Emerson Computer Monitor MSM400 User Manual

Instruction Leaflet

IP258

November 2004

Level

Mobrey

MSM400 Intelligent

Suspended Solids Monitor

Software Version 1.1

www.mobrey.com

CONTENTS

Page

PRODUCT INTRODUCTION

1.1

1.2

The MSM400 slurry monitoring system

Description

SENSOR TYPES

2.1

2.2

2.3

Safety Precautions

Hazardous Area systems

Quick Start guide

CONTROL UNITS

3.1

3.2

MSM400 Displays and Keypad

Specifications

INSTALLATION

4.1

4.2

4.3

4.4

4.5

4.6

Preliminary Checks

Pipe Section Installation

Suspended Sensor Installation

Sensor Cabling

Control Unit

Electrical Connections

PROGRAMMING

5.1

5.2

5.3

5.4

Programme Structure

Navigation in the Menu System

Diagnostic Parameters

Ex-Factory System Features

CALIBRATION

6.1

6.2

6.3

6.4

6.5

6.6

6.7

6.8

6.9

Zero Setting

Re checking Zero

Auto cal zero setting procedures

Auto cal span setting procedure

Auto cal lab values

Maximum % solids

Calibration - Alternative method

Zero setting procedure

Span Calibration Methods

6.10 Method 1-Slurry Type

6.11 Method 2-Sample Calibration

6.12 Method 3-Attenuation Value

7.0

PROGRAMMING THE MSM400 FUNCTIONS

7.1

7.2

7,3

7.4

7.5

7.6

7.7

7.8

Outputs

Current output

Relay Operation

Alarm

Display

Back Light

Engineering

System

HART SMART COMMUNICATIONS

MAINTENANCE / INSPECTION

APPENDICES

A1.

A2.

A3.

Full Listing of Menu Structure

31-32

33-37

38-40

41-59

Full List of Programme Parameter Functions

HART and PSION Operating Instructions

Handheld Communicator - Assembly Instructions

Footnote :-

In this manual the following terms are used which refer to trademarks from other manufacturers:

HART: is the protocol adopted for the MSM400 SMART Communications.

HART is a registered trademark of the HART Communications Foundation and is a mnemonic For

Highway Addressable Remote Transducer.

PSION: is the trade mark of PSION plc who manufacture the PSION ORGANISER Hand held computer.

The MOBREY SMART program is stored in a DATAPAK which is also a trademark of PSION plc, and is an accessory

for the Model LZ Organiser

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Safety Precautions

The following safety precautions should be observed before using this product or working on the attached cables.

This MSM400 product is intended for use by qualified personnel who recognize shock hazards and are familiar with

the safety precautions required to avoid possible injury. Read the operating information carefully before using the

product.

The types of product users are:

Responsible body: This is the individual or group responsible for the use and maintenance of equipment, and for

ensuring that operators are adequately trained.

Operators use the product for its intended function. They do not require access to the electrical connections within

the control box, and would normally only operate the external keypad and monitor the display.

Maintenance personnel perform routine procedures on the product to keep it operating, for example, checking the

line voltage or checking electrical connections, replacing mains fuses etc.

Service personnel are trained to work on live circuits, and perform safe installations and repairs of products. Only

properly trained service personnel may perform installation and service procedures. However, the only serviceable part

in MSM400 is the mains cartridge fuse.

Users of this product must be protected from electric shock at all times. Product users must be trained to protect

themselves from the risk of electric shock.

Before operating the instrument, make sure the mains supply is connected to a properly grounded power supply.

Periodically inspect the connecting cables for possible wear, cracks, or breaks. Check lid and glands are tight, also

check unit for damage and if damaged do not use.

The fuse may only be replaced with same type and rating for continued protection against fire hazard.

To clean the instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument only. Do

not allow liquids to enter or spill on the instrument.

WARNING - If this equipment is used in a manner not specified by Mobrey Measurement, the protection provided

may be impaired. The MSM400 is regarded as permanently installed equipment and as such a double pole supply

isolating switch or circuit breaker must be included in the installation. This should be in close proximity to and not

be obstructed by the equipment. It should be marked as its disconnecting device.

A protective earth must be used for all applications.

The installation of the MSM400 and its associated power cables must be such that tank overflow, local flooding or

pump failure do not cause these to be submerged or subject to flows of water. Sensors and sensor cabling can be

submerged without hazard to equipment operators when correctly connected as described in this manual.

CHECK THAT THE POWER SUPPLY IS SUITABLE BEFORE SWITCHING POWER ON.

Internal adjustments can select mains 115 Volts AC power, which makes the equipment unsuitable for 230V AC

supplies. Check this Voltage selection switch compared to the available power supply.

Explanation of symbols:

The Protective earth terminal must be connected to an external Protective earthing system.

Refer to manual.

Hazardous area systems :-

Where the MSM400 is connected to sensors located in an explosive atmosphere additional instructions apply.

Refer to Safety Instructions IP258/SI

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QUICK START

Terminal connections

SENSOR CONNECTION

L IVE NEUTRAL EARTH

MAINS IN

Connect the mains supply to the terminal connections L, N and E as shown above.

Connect the sensor to the terminals as shown above.

With power on, press a button on the key pad as shown below. This will access the main menu.

DISPLAY

MAIN MENU

TOGGLERUN

CALIBRATION

SETUP

ꢂ

ꢁ

Navigation around the menu system is achieved by using the up and down arrow keys to highlight an option and

the ENT key to accesss the various levels. Pressing ESC returns the user to the previous level.

Highlight toggle run and press ENT. PRESS ENT AGAIN to open the toggle run padlock. Press ESC to return to

main menu. Parameters may now be altered.

To calibrate the unit, highlight CALIBRATION and press ENT.

Now highlight AUTOCAL and press ENT.

AUTOCAL

SETZERO MAX %

SETSPAN

CALIBRATION

AUTOCAL

MANUALENTRY

MAX %

ꢃ

LABVALUES

Highlight SETZERO and press ENT

SET ZERO

In clear liquor

Press ꢁ

SET ZERO

In clear liquor

press ENT to set

-------------Signals from sensor

16.2 dB

25.3 dB ꢄ

Follow the instruction then wait a few seconds.

When ENT is pressed the zero is set. Press ESC four times to return to normal display.

10)

Follow the same procedure to set the span. i.e. Highlight SETSPAN in the AUTOCAL menu and press ENT.

Up to 3 SPAN values can be taken. Press down arrow to access next span.

11)

When setting span, sludge samples should be taken for analysis. The results of the samples are the input to the

control unit for reference in THE LABVALUES menu.

INPUTTING A VALUE

Access the parameter as shown below :

CALIBRATION - Manual/Entry

AUTOCAL - SETZERO

LabVal 1

SETSPAN

LAB VALUES

ENT

0.00 P150

ENT

LabVal 1 ------------------

LabVal 2

LabVal 3

ENT

To input a value press the right arrow to highlight the correct digit to be altered. The value of the digit is then

incremented or decremented by using the up or down arrows. To save a value press ENT. 'ESC to return to menu'

Now input your expected max % solids required. Located in - Calibration - AUTOCAL - Max %. (See section 6 for

details)

All other parameters are setup in a simpler way and can be located by looking at the full menu structure in

Appendix 1 of this manual.

For outputs to be made active Toggle run padlock must be closed.

Note: Press and hold ESC to return to the main menu form any where in the menu structure. Press ESC once more

to return to normal display. Once a parameter is reached (indicated by P*** or D*** on the display) all other

parameters can be reached by simply scrolling using the up or down arrows.

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1.0

1.1

PRODUCT INTRODUCTION

THE MSM400 SLURRY MONITORING SYSTEM

The MSM400 is an advanced Microprocessor based, HART compatible, versatile slurry measurement system, with a

wide range of built-in display, control and alarm function options. The Menu driven programming is simple to use,

and allows complete configuration of the unit from the external membrane keypad. Sensor and electrical connections

are in a separated terminal housing.

This manual is for Software Version 1.1

1.2

PRODUCT DESCRIPTION

The Mobrey MSM400 is a microprocessor based electronic control unit. It operates with sensors mounted in a pipe

section or suspended in a tank. The MSM400 monitors the suspended solids concentration in the liquid between

the two sensor faces. The normal application is to monitor this percentage, typically in the range 0.5% to 15%, to

provide signals for a plant control system to operate the slurry transport process. Typically this might be to desludge a

sewage settlement tank, or in mineral processing to maintain the percent solids of china clay, or similar, moving on to

further refiners.

The technique used to measure suspended solids is ultrasonic attenuation. As suspended solids pass between the

gap in the sensor faces they scatter the ultrasound. The amount of signal that the sensor receives is inversly

proportional to the % of suspended solids.

To allow accurate measurement over a wide range of % solids the attenuation is measured at 2 different frequencies.

Control signals :

The MSM400 has a 4-20mA, 2 relays and analogue output, typically 4-20mA, The MSM400 can control a desludge

operation using a combination of measured % solids, external trigger and internal timers.

The unit is also HART compatible, to feed in to digital control systems using HART protocol.

A typical application would be with the sensors mounted in a discharge line from a refiner or settlement tank. The

relay in the MSM400 would be used to stop the de-sludge cycle when the liquor runs clear, switching at typically

about 4-5% suspended solids.The ultrasonic technique has an advantage over some techniques in that it is largely

unaffected by fouling of the sensor face.

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SLURRY CHARACTERISTICS

The relationship between the measurement of ultrasonic attenuation and the percentage solids of a particular slurry

type is dependent on the density of the slurry particles and their average size distribution. This is known from

experience for most slurry types, and is expressed as a number, which is the ultrasonic attenuation in deciBels (dB),

per mm gap between sensor faces, per one percent suspended solids.

The relationship between attenuation and suspended solids is

Attenuation

shown graphically in Figure 2. Calibration of the unit involves

adjustment of the zero point, by setting up the sensors in

clean liquid (supernatant), and then setting the slope of the

straight line graph, either according to past data or from site

samples.

(dB)

In the memory of the MSM400 there is information on various

slurry types, to enable simple initial set-up. More accurate

adjustment can then be made once site samples have been

taken.

Zero Ref

% Solids

Figure 2 :

Ultrasonic Attenuation versus

Suspended solids

Calibration:

The Mobrey experience with using ultrasonics for suspended solids monitoring has been developed over 25 years.

Calibration systems for the MSM400 use this experience, allowing the plant operator to choose whether to set up the

unit based on Mobrey site and slurry experience, or whether to take site samples to fine tune that data to suit the

specific site conditions. The MSM400 is versatile enough to allow simple or complex calibrations.

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2.0 SENSOR TYPES

2.1 SUSPENDED SENSOR TYPE MSM433

R¾" (BS21:1973)

¾" BSPT

Material :

Gap size :

316 Stainless steel

100mm, 150mm, 200mm,

300mm,

450mm

(others on request)

Dual twin-axial

Cable :

Max. Pressure :

Temperature range : -40°C to + 70°C (others on

105 kg/cm2 (103 bar)

Standard gap = 150mm

102

request) Refer to Sensor

safety data for intrinsically

safe systems

Specify gap

50 to 450mm

Figure 3 : MSM433 Sensor and Specifications

2.2

MOBREY PIPE SECTION SENSORS

The Mobrey pipe section is used as part of a pipeline transporting the slurry to be monitored. Each pipe section

contains two sensors, installed with their faces accurately aligned and flush with the pipe inner wall, to avoid any

excessive slurry or grease build up on the faces.

455

Material pipe section :

Material sensors :

Drain fitting :

Malleable cast iron epoxy coated

316 stainless steel

1" NPT

Mounting connection :

Flanges :

In line installation

DN100, DN150, DN200 to BS4772

(others on request)

Max pressure :

10 Bar (PN10)

Temperature range :

-40°C to +70°C(for T6), +120°(for T5)

Retaining nut

Location pin

(Others on request)

Refer to Sensor safety data for intrinsically

safe systems

Sensor cable :

Oil hose protected on pipe section,

Screened twisted pair

Cable length :

7m dual twin-axial from junction box (others

on request)

Cable junction box :

IP65 aluminium alloy

'O' ring

Sealing

face

Figure 4 : MSM448 Pipe Section Sensors

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2.3 SENSOR TYPE NUMBERING SYSTEM

MSM *** * *** * * / *

No.

- Indicates special requirement

i.e. 1 - with PN16 flanges

- 7m cable supplied as standard

- Customer defined upto 100m (must be

clearly stated on order

- Spray valve (pipe section only)

- No spray valve (pipe section only)

- 433 tank mount

000 - Sensor size i.e. 100, 150, 300, 450mm as standard

for tank mount

100, 200, 150mm as standard for pipe section sensor

(others on request)

- Intrinsically safe (ATEX)

- Non Intrinsically safe

433 - Sludge blanket tank mount sensor

448 - Sludge pipe mount sensor

In intrinsically safe systems, the maximum length of integral cable permitted by the sensor certification is 50m.

Additional extension cables are however permitted.

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3.0 CONTROL UNIT

3.1 MSM400 DISPLAYS AND KEYPAD

Figure 5 : MSM400 keypad and LCD display

The MSM400 is wall mounted: the lower

section of the housing is for cable connections,

and the upper part has the 4 line LCD and

keypad controls. The whole unit is IP65.

Display 1

03.09

RL1

RL2

ꢆ

Typically the display will show as in Figure 7,

the top line shows whether the programme lock

is open together with the time display. The

actual value is displayed in the centre. The

attenuation figure in decibels is on the bottom

line.

4.6 %

ꢅ

46.3dB

Display 3

Figure 6 : Typical MSM400 liquid crystal display

Display 2

Additional flags on the display show the status of the two relay outputs, RL1 and RL2 ,and of the digital control

inputs into the MSM400.

KEYPAD OPERATION :

There are 6 buttons on the MSM400 front panel, the four ARROWS allow navigation around the programming menu

and the " ESC" and "ENT" buttons allow movement from one screen to the next. By pressing "ESC" repeatedly, the

screen will always return to the normal display as shown in Fig 7. Movement through the menu structure using the

arrows is shown by the titles being "highlighted", ie reversed to showing white letters on a black background. The LCD

is backlit for operator convenience. (This can be turned off if required).

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3.2

SPECIFICATIONS--MSM400

Housing

ABS with polycarbonate lid, IP65

External dimensions

Cable Glands

256.5 wide, 236.7 high, 95.0 deep, including wall mounting brackets

3x 16mm holes and plastic glands supplied

3x 20mm holes and plastic glands supplied

Weight

2 kg

Wall Mounting holes

Power supply options

6 off Diam 5.0mm (See Drawing Section 4.5)

115 V a.c. ( 15%) 50 / 60 Hz

230 V a.c. ( 15%) 50 / 60 Hz

or 24 V d.c. (15 to 30 Volts)

Power consumption

a.c. 10VA

d.c. 6W

Fuse (F1)

200 mA (T) 5 x 20mm

Current Output

0-20 or 4-20 mA selectable,

maximum load 1KΩ (at 22mA)

maximum applied voltage 48v d.c

HART

HART digital communications, Two HART internal test terminals provided.

2x SPCO Relays, rated 5 Amps at 250 V a.c. Resistive

Relay Outputs

DC Power Output

Sensor connections

Trigger inputs

24V DC for external sensors such as Mobrey Electrosensor

Terminals for Mobrey sensor Tx and Rx cables, each 2 cores and screen

Unit accepts two 5V d.c.trigger input signals. 5V d.c. provided - compatible

with Mobrey Electrosensor

Terminals

Max. cable size 2.5mm²

Ambient temperature

Max Altitude

-30°C to 55°C

2000m

Max Humidity

Electrical Safety

Installation Category

Pollution Degree

EMC

95% RH

Conforms to EN61010-1

Cat III 132V a.c. Max., Cat II 264V a.c. Max.

Complies with EN61326 (Industrial level)

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INSTALLATION

4.1

PRELIMINARY CHECKS

The MSM400 system is normally supplied in two packages, one for the MSM400 Control Unit and one for the

sensor, whether it is a pipe section or a tank sensor. Take care in handling the pipe section. In particular do not

damage the cable or the hose protection for the cable where it enters the sensors. Before installation check that

there has been no damage in transit, particularly to the sensor cables. Check that the equipment is as specified, and

that the pipe section length and flanges are compatible with plant pipework.

Sensors in intrinsically safe systems may be mounted in potentially explosive areas ("hazardous areas"). Refer to the

sensor safety data section 2.4.

The control unit must be mounted in a non-hazardous ("safe") area. Refer to control unit safety data section 3.3.

4.2

PIPE SECTION INSTALLATION

The Mobrey MSM448 pipe section sensor should be same size as surrounding pipe work. It should be installed in a

straight section of line, if possible, with the sensors in a horizontal plane. This avoids the sensors being covered with

debris at the bottom of the pipe, and being in an air gap at the top of the pipe. Particular attention must be paid to

the positioning of the pipe section in relation to pressure reduction or agitation of the slurry to be monitored :

Sensors horizontal in pipe OK

Pipe line

Sensors vertical in pipe NOT OK

Pipe line

Sludge settles on bottom sensor

Top sensor probably in air

Figure 7 : Pipe sensor orientation

WARNING:

Air or gas that comes out of suspension in a slurry gives a high ultrasonic attenuation, giving a false high solids

reading. The installation must maintain the full hydrostatic pressure in the slurry up to the pipe measurement

section. Any unnecessary pressure reduction should be avoided. This means avoid free fall of the slurry into a sump,

avoid pumps and partly open valves, avoid abrupt changes of pipeline diameter upstream of the sensor pipe section

installation point. If possible position the sensors directly at the outlet of the tank, low down, so that the full

hydrostatic head is maintained on the monitored liquid. However, it may be necessary to remove the sensors for face

cleaning later, so isolation valves are desirable. The Mobrey Sensor pipe is supplied with a flushing spray nozzle,

which directs a supply of water at the sensor faces. This is a useful cleaning procedure, avoiding the need to remove

the sensors from the pipe. A water supply is required, connected to the purge nozzle on the top of the sensor pipe

section.

4.3

SUSPENDED SENSOR INSTALLATION

The Mobrey MSM433 sensor is available with the gap between sensor faces from 100 mm up to 450 mm, for higher

sensitivity to light slurries. These sensors are usually mounted directly into the settlement tank, at pre-selected levels

above the tank discharge outlet. Mounting can be vertically down on a piece of conduit, or suspended on the sensor

cable. Whilst the conduit might be attached to the tank wall, it is normal to have the sensor well away from the wall

itself, to avoid any non moving slurry or "dead" settlement areas. It should be possible to lift the sensor out for

periodic cleaning and/or rag removal.

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4.4

SENSOR CABLES

The ultrasonic drive signals on the sensor cables are normally at 1MHz and 3.3MHz. The cables are a special

construction of two separately screened twisted pairs, designed to meet electromagnetic compatibility regulations.

The cables can be extended up to 100 metres, but should use the same cable type, available from Mobrey

Measurement. (or consult factory for alternative vendors). The certification for intrinsically safe systems requires that

cable joins should be in enclosures rated at least IP20 and suitable for the intended enviornment and that the wiring

should withstand a test voltage of 500V rms to earth. The electrical parameters of the cable used must conform to

Table 1 in section 2.4.

Twisting the cables on installation should be avoided. Cable runs should be separated from any high voltage or mains

cables, to avoid crosstalk or switching transients.

4.5

CONTROL UNIT

The control unit housing is rated IP65. It is suitable for mounting outside, but this should be above any flood level,

away from any overflow water path, and away from direct sunlight. Internal sensors turn the LCD backlight off if the

temperature is excessive.

The control unit must not be mounted in areas where an explosion hazard exists.

It is not necessary or advisable to remove the lid to the upper part of the box, containing the LCD and keypad.There

are no user serviceable parts inside. The control unit must not be modifed in any way. The keypad and LCD are

linked to the lower electronic pcb by a ribbon cable at the left hand side of the upper housing. Mounting brackets

for wall mounting are provided, and these should be attached to the rear of the housing using the self tapping screws

(also provided).The brackets are then used to wall mount the MSM400, using the six mounting holes available.

Dimensional information is shown below:

203.5

Internal wall mounting holes

4.2

226.5

241.5

256.5

Figure 8 : MSM 400 Control Unit Dimensions

Note that the weight of the MSM400 is 2Kg. To conform with safety requirements the wall should be capable of

supporting 4 x this weight, ie. 8Kg. 5mm diameter steel screws should be used.

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4.6

ELECTRICAL CONNECTIONS

All field wiring connections are accessible by removing the lower lid, which is secured by two screws. Note that it is

the responsibility of the installer to observe all local regulations and approval requirements, and to use cable to suit

the environmental requirements of the particular application. Obtain and check any hazardous area work permits

required before applying power to the MSM400.

The diagram below shows the layout of external connection terminals: all terminal blocks are suitable for wires

0.5mm²to 2.5mm²(26-12 AWG). Insulation should be stripped back 7mm.

Ensure wiring is suitable for the load current and the insulation is suitable for the voltage, temperature and

environment of the installation.

Note that in intrinsically safe systems, apparatus connected to the MSM400 must not be supplied from a voltage

greater than 250V rms or 250V DC.

FUSE

200mA

K7941

Figure 9: Connection Terminal Layout

Note that not all of the labelled terminals are functional in this version of the MSM400. The functions available are

listed below :

CONNECTION DESCRIPTIONS :

Terminal

Label

RX A

Function

Sensor Cable

Screen for 1+2

Screen for 5+6

Sensor Cable

RX SCN

TX SCN

TRIGGER 0V Ground ref for Trigger inputs

TRIGGER D1 Digital input No 1

TRIGGER 5V 5 V output

19-21

22-24

I out Io

Current output (4-20mA)

I out 0V

I out 24V

RELAY 1

RELAY 2

Current output zero ref terminal

Current output 24 V DC loop power : refer to Fig. 10

NC-C-NO Relay output terminals for Relay 1

NC-C-NO Relay output terminals for Relay 2

DC out 24V Output of 24 VDC for powering external devices.

DC out 0V

DC in 24V

DC in 0V

Mains L

Mains N

Mains E

Ref for DC output

Positive supply at 24VDC to the MSM400--ie DC power input

Ref terminal for DC supply input

AC power input 115/230V, Live terminal

AC power input 115/230V, Neural terminal

Protective Earth (PE)

NB: SELECT 115 or 230V

ON SWITCH ABOVE

THESE TERMINALS

NOTE 1

The sensors are symmetrical, so either of the two cable pairs can be chosen as "Tx" or "Rx

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SENSOR CONNECTIONS

The sensor connections are on the left side of the terminal enclosure.

Each sensor has two screened twisted wire pairs, either as one dual pair cable, or two separate pairs

One pair is connected to the TX (transmit) group and the other to the RX (receive) group. The sensors are

symmetrical so either of the pairs can be chosen as TX or RX. The two cores in each group are connected to A and

B, the polarity is not important. Each screen connection, normally coloured green, is connected to the group’s SCN

terminal. Cable screens must not be earthed at any other point.

The un-screened length of the cores should be as short as possible, to prevent crosstalk, but in any case no longer

than 30mm.

RELAYS

The relay NC-C-NO labels represent the relay terminals in the de-energised state.

HART CONNECTIONS AND JUMPER SETTINGS

There are two clearly labelled HART Test Points, labelled A and B. These test points are for connection of a HART

Hand Held Communicator, to provide a local interface to the MSM400 if required. Above terminal blocks 7-12 there

is a plug selector labelled PL1.

The normal position is with the plug shorting out the left hand pins. In this case, the external 20 mA loop must have

at least a 250 ohm impedance to enable HART communictions. With the plug in the central position, the MSM400

itself provides this load in the 20 mA loop. The right hand position enables HART communication when there is no

external loop connected by connecting a 270 ohm resistor across the current output. (See Appendix D).

NOTE:

The 20 mA output will not function correctly when the link is in this right hand position, so replace it in position 1 or

2 after use!

CURRENT OUTPUT

The current output may be connected in loop-powered mode or internally powered mode.

See connections in Fig 10 below.

In Loop-powered mode an external power source is required. A minimum of 2.5v is required across terminals 16 and

17 for correct operation. The external voltage should not be more than 30v.

Note that the current output must not be routed through hazardous areas unless protected by an additional I.S.

barrier.

Terminal Number

Figure 10 : Alternative current output configurations

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TRIGGER INPUTS

There is trigger input D1. This can be used to control desludge and other functions see programming section. The

digital trigger input is connected as shown below:

A voltage greater than 2V on Terminal 8 (D1) causes trigger input 1 to be active. This can be achieved by

connecting to terminal 10 (5V) via an external switch or relay. The maximum voltage should not exceed

28V.

24V

MES*AI OR

ELECTRO SENSOR

The trigger input is also compatible with the MOBREY Electrosensor sensors and head amplifiers. A 24V output is

provided for this purpose. Typically this allows complete control of the desludge cycle by using a second sensor

(Electrosensor) to start or stop the cycle. The terminal connections are shown above (note: it is important that the two

0V connections on terminals 7 and 26 are linked).

NOTE : When connected to these terminals the electrosensor sensors and head amplifiers MUST NOT be

installed in explosive atmospheres.

MAINS SUPPLY

The unit can be powered either by 24V DC or by mains AC power. If both are connected, the unit will select the

supply producing the highest internal 24V power rail. Select the AC Voltage as 115V or 230V using the selector slide

switch above the AC line terminals.

Although the MSM400 meets all European standards for surge immunity on power and signal lines, it is

recommended that lightning suppressors are fitted if local conditions make this advisable. Units manufactured by

Telematic are suitable.

SAFETY PRECAUTIONS

A switch or circuit breaker should be installed in close proximity to the instrument, and labelled as such.

The unit must be earthed using the protective earth terminal 31.

INITIAL POWER UP

The unit will initially display the software revision number on Power up, and then revert to the standard display

screen, showing a measured slurry/sludge density. If the sensor is in air, then this value will be high -the unit is

effectively at full scale deflection.

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5.0

PROGRAMMING

5.1

The operation of the MSM400 is controlled by means of programmable parameters. These are stored in

memory and may be set by the user to define variables such as calibration scale factors, set points, and modes of

operation. The parameters are accessed using the keypad, by means of a menu system as shown below. (Parameters

may also be edited remotely using the HART protocol. See Appendix N). For a full listing of the menu structure refer

to Appendix A1.

5.2

Navigation in the menu system

From the main display, pressing any key except ESC will enter the menu system. The top level menu contains the list

of available menu items:

TOGGLE RUN

CALIBRATION

SETUP

MONITOR

To move up and down the list, use the UP and DOWN arrows until the required menu item is highlighted, then use

the ENT or RIGHT arrow key to select it. The presence of additional menu items off the screen is indicated by up

and down arrows on the right hand side of the display

The next level of the menu is then displayed and the required option can again be selected as above.

Continue until the required parameter is displayed and select it using the ENT key. (Note that menu groups are in

upper case letters, parameters are in upper and lower case.)

The parameter may now be modified. Numeric values are edited one digit at a time, the LEFT and RIGHT arrows

select each digit by highlighting them and the UP and DOWN arrows increment and decrement each digit. Some

parameters e.g. “PV Units” are in the form of a list. These are edited in a similar way, selecting with the RIGHT arrow

and using the UP and DOWN arrows to scroll through the list

When the displayed value is correct, press the ENT key to store it.

Scrolling

When a parameter is displayed but no digit is selected, the UP and DOWN arrow keys will scroll to the next parameter

in numeric order. This provides an alternative method of accessing parameters without using the menu facility.

Example: Relay 1 set point programming.

To programme the relay, follow the simple steps shown below;

To alter any menu option the padlock icon in the top left of the display must be open. This is done using the

TOGGLE RUN menu.

To access TOGGLE RUN from the normal display, press any key except ESC to display the main menu. The

down arrow (↓) shown on the screen indicates that there are further options. (including MONITOR)

MAIN MENU

TOGGLE RUN

CALIBRATION

SETUP

↓

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Use the down arrow key (ß) to highlight the TOGGLE RUN option and select it using the “ENT” key. The

TOGGLE RUN screen is then displayed:

TOGGLE RUN

To open (or close) the padlock press ENT as required. Press ESC to return to the main menu.

Programming is now enabled.

From the Main Menu screen, use the down arrow key (ß) to highlight the SETUP option and select it using

the “ENT” key

In the SETUP menu use the ß key to highlight the OUTPUT option and select it.

In the OUTPUT menu use the ß key to highlight the RELAY option and select it.

The parameters associated with the relays are now shown.

10.

In the RELAY menu highlight the RELAY 1 MODE and select it using the “ENT” key.

Relay 1 Mode

Set Point

P410

11.

Press the right key (Þ) to highlight the option.

Relay 1 Mode

Set Point

P410

12.

13.

14.

Note; with the option highlighted pressing the up and down arrows scrolls through the available options.

With the set point option highlighted press ENT to select. The highlighting now disappears.

Pressing ß will display the next item in the menu, RL1 On Point.

RL1 On Point

0.00

% 0

P411

15.

16.

This is a numeric parameter, therefore pressing Þ highlights the first digit that can be edited.

RL1 On Point

% 0

000.00 P411

Select the digit to be edited by pressing Þ as necessary.

RL1 On Point

% 0

000.00 P411

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17.

The value of the digit may now be incremented or decremented by pressing ⇑ ⇓.

RL1 On Point%

003.00

P411

18.

19.

Press ENT to store the value. The highlighting will disappear. If an invalid number is entered then the display

will revert to the last valid value.

The relay off point is programmed in the same way (all other numeric parameters are programmed in a similar

way).

20.

21.

When programming is complete, return to the TOGGLE RUN menu and close the padlock.

Note; any programme changes will not alter the outputs, which remain frozen,

until the TOGGLE RUN padlock has been closed.

5.3

DIAGNOSTIC PARAMETERS

Apart from the user-settable parameters described above, there is another set of diagnostic parameters, which display

measured or calculated data to analyse and optimise system performance. These have the prefix “D” and cannot be

modified.

5.4

EX-FACTORY SYSTEM FEATURES

The MSM400 Control Unit is supplied with default parameters that allow basic initial operation. The values and

descriptions are listed in appendix two of this manual.

6.0

CALIBRATION

There are several methods for calibrating the MSM400, AUTOCAL and MANUAL ENTRY, these together with some

important basic principles are explained below. Calibration always comprises two stages, zero setting and span setting.

Zero setting calibrates the system so that the control unit indicates 0% solids in clear liquid.

Span and lab value setting calibrates the system to monitor suspended solids accurately.

The recommended, simplest and most accurate method for calibrating the MSM400 is by using the AUTOCAL

procedure, which is explained below.

6.1

ZERO SETTING

INITIAL ZERO

The MSM400 has the facility to warn the operator that the sensors require cleaning. The first zero calibration will be

stored in initial zero reference parameter, “Init zero ref”. Future zero calibrations are compared with this value and

any significant change will produce a warning message like the one shown below.

SET ZERO

In clear liquor

press ENT to set

Sensor dirty

The actual difference required to produce this warning is programmed in dirty point (SETUP – ENGINEERING

– SENSOR LIMITS – Dirty Pt). The default value is 0, which disables this feature. To enable the feature it is

suggested that a value of approximately 6 dB is entered.

Note: this warning feature is not active until the first zero calibration has been carried out.

To reset or clear initial zero value, ‘0’ must entered in Initial zero reference parameter (CALIBRATION – MANUAL

ENTRY – ZERO REF – “Init Zero–1MHz” and “Init Zero–3MHz”, P123 & P124).

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6.2

RECHECKING ZERO

It is recommended that the zero is checked regularly. The frequency of re-calibration is dependent on the process.

However, it is suggested that this be done at least every 6 months.

CALIBRATION METHODS

AUTO CAL

6.3

AUTO CAL - ZERO SETTING PROCEDURE

AUTOCAL is a simple step by step calibration routine in which the user is guided through the calibration process by a

series of user friendly screens. AUTOCAL is the recomended calibration proceedures.

The attenuation of the ultrasonic signal in dean liquid varies slightly from sensor to sensor. For optimum system

accuracy it is important to set up this zero loss accurately. When the system has been installed, immerse the sensors

in the clearest liquid available. If this is not practical, choose a point in the cycle when the liquid in the gap between

sensors has the lowest possible % suspended solids. For example on sewage treatment plants wash water would be

acceptable.

Firstly enable access using the “TOGGLE RUN” command in the MAIN MENU.

Highlight the CALIBRATION option in the MAIN MENU by pressing the down arrow key.

MAIN MENU

TOGGLE RUN

CALIBRATION

SETUP

Press ENT.

CALIBRATION

AUTOCAL

MANUAL ENTRY

Max %

Highlight the AUTOCAL option by pressing the down arrow key, and press ENT.

CALIBRATION

AUTOCAL

MANUAL ENTRY

Max %

Highlight the SETZERO option and press ENT. The following will show on the display.

CALIBRATION

SETZERO Max %

SETSPAN

LAB VALS

Follow the instruction, the display will show the following

SET ZERO

In clear liquor

Press

⇒

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The display will show the following.

SET ZERO

In clear liquor

please wait

After a few seconds the display will show the following.

SET ZERO

In clear liquor

Press ENT to set

23.1dB 26.2dB

The two dB values at the bottom of the screen are the zero values for the operating frequencies of the sensor

(1MHz and 3.3MHz).

Once the ENT key is pressed the zero is set. All zero reference data is now saved together with the

date of zero calibration. The screen now gives the option to re-do the zero setting or return to the AUTOCAL menu.

SET ZERO

Zero is now set

ESC to finish

ENT to re-do

6.4

AUTOCAL - SPAN SETTING PROCEDURE

The span setting measures the signal received from a representative sample of sludge. Later when the sludge is

analysed and the results entered in the control unit the system automatically calculates the correct calibration factor

(SLOPE).

If suitable slurry is not available an approximate calibration can be done using slurry types chosen from a list. This

proceedure is detailed in Sectiono 6.10.

At least one span measurement must be taken. However, for better accuracy it is possible to take up to three span

measurements and the MSM400 will calculate the average value.

Return to the AUTOCAL menu and highlight the SETSPAN option.

CALIBRATION

SETZERO Max %

SETSPAN

LAB VALS

Press ENT. The following is shown on the display

SET SPAN

In sample 1

Press

⇒

Now allow the normal or thickest (thickest is best) sludge which is to be metered, to cover the MSM400 sensor.

Press the ⇒ key the display will show.

SET SPAN

In sample 1

please wait

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After a few secnds the display will show the following.

SET SPAN

In sample 1

Press ENT to set

33.6dB 44.2dB

The bottom line of the display shows the attenuation caused by the sludge. During a desludge these readings will

fluctuate due to random variations in the sludge density. When the readings are reasonably stable press ENT at the

same time that a sample is taken. This will store the reading from the sensor.

SET SPAN

Span1 is now set

ESC to finish

↓ for Span2

Press the down arrow key to access the sample 2 and sample 3 screens (if required).

Repeat the above procedure for samples 2 and 3. The span is now set and ready for input of laboratory result (see

later). When the sample procedure is complete press ESC until the normal display shows.

For best accuracy the three samples should be taken over a period of approximately 2 to 3 minutes.

The samples should now sent for laboratory analysis to establish the actual suspended solids content.

When the laboratory analysis results are available, the span calibration can be completed by entering the solids

content (in % Solids) into “Lab Value 1” (P150).

If required, an estimated value can be used until the laboratory analysis results are available.

Note:

Each time SPAN 1 is set the other two SPAN and LAB values are cleared and are not used

until new Span2 and Span3 calibrations are carried out. The MSM400 calculates the

average of all the valid span calibrations (a valid span calibration is one which has both a

span ‘N’ and lab val ‘N’ value). The calibrations must be carried out in numerical order

i.e. Span 1, then Span 2 and then Span 3. These values should be carried over a short

period of time i.e. 2 to 3 minutes.

6.5

AUTO CAL LAB VALUES

To complete the AUTO CAL the samples must now be analysed and the results entered into the lab value menu.

Access the LAB VALS menu by highlighting this option in the AUTOCAL menu and pressing ENT.

LAB VAL

LabVal 1

LabVal 2

LabVal 3

Highlight the number of the LabVal to be entered and press ENT

LAB VAL

% 0

LabVal 1

0.00 P150

Highlight the digit to be edited by pressing left or right arrows. To change the LabVal use the up and down arrows

until the required value is showing, then use left or right arrow to move on to next digit. The units of this parameter

are always % suspended solids. When the correct value is displayed press ENT to store the value. Repeat this step to

input LabVal 2 and LabVal 3 if required (please note that better accuracy is achieved if all three samples and

corresponding LabVals are entered). Press ESC until the normal display shows.

It is important to note that until the LabVal (1,2 or 3) are entered the system will use the default value of

attenuation for the calibration.

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6.6

MAXIMUM % SOLIDS

To complete the calibration and to enable the system to automatically select the optimum frequency of operation., it

is necessary to set the maximum % solids that the system is required to measure.

In the AUTOCAL Menu, select ‘Max % Solids’ (P 160) and enter the value required.

If the maximum % solids are low then the system will choose the higher operating frequency (3.3 MHz). This will give

the best possible resolution. If the maximum % solids are higher than can be measured at 3.3 MHz then the system

will automatically select the lower frequency (1 MHz). The figure for the maximum % solids that can actually be

measured can be seen in MONITOR - DIAGNOSTICS - SENSOR – Max Measurable (D861)

The control unit is now calibrated and ready for operation.

6.7

CALIBRATION- Alternative calibration methods

Calibration is normally done via AUTOCAL. However, in special cases, if required, calibration can be done manually.

6.8

ZERO SETTING PROCEDURE

Firstly enable access using the “TOGGLE RUN” command in the Main menu. See section 5.2. Next, ensure that the

frequency of operation corresponds to the frequency of the sensor by checking parameter D860 located in

Monitor\Diagnostics\Sensor\Frequency. If necessary it can be changed. The relevant parameter is “Frequency” (P630)

located in Set up\ Engineer\. When the sensor is in “clear” liquid note the value of “Attenuation (D852) located in

Monotor\Diagnostics\ Sensor.

To complete the zero setting, enter this value in the appropriate “Zero ref” parameter, located in Calibration\ Manual

Entry\Zero ref.. “Zero ref A” (P120) is used for 1MHz sensors, “Zero ref B” (P121) is used for 3.3MHz sensors.

6.9

SPAN CALIBRATION/GRADIENT METHODS

There are three alternative ways of setting the gradient relationship between the measured attenuation and the %

solids displayed (See Graph shown in Figure2). It is recommended that if AUTOCAL is not used then the Initial Setup

should use Method 1: when later, figures are entered according to Methods 2 or 3, these automatically take priority

over an original Method I calibration.

The First alternative method uses previous Mobrey experience of slurries/sludges, and the slurry type is chosen by

name from a list. The MSM400 then uses the appropriate calibration line.

The Second alternative method uses actual site samples, and as such it is usually the most accurate calibration

method. When the MSM400 reading is stable, a sample of slurry is taken for Lab analysis, and the attenuation

measured at that time is recorded/entered in the MSM400 memory. Later the Lab result is also entered into a

different location in the MSM400 memory, and the microprocessor computes the relationship.

The Third alternative method uses a known mathematical value of attenuation versus suspended solids for the slurry

to be monitored from site experience on other tanks or other installations with the same sensor arrangement and

slurry.

6.10 CALIBRATION METHOD 1-SLURRY TYPE

Enter the CALIBRATION option on the MAIN MENU screen. Then ENTER ‘MANUAL ENTRY’. There are four

selections possible here. Select SENSOR\ Sensor Gap and enter the space between sensor faces, in mm. This tells

the MSM400 how big the sensor is, to relate it to memory figures of attenuation. Select SLUDGE TYPE (access

through CALIBRATION, MANUAL ENTRY, SENSOR menu) and for Method I calibration select one of the listed types

to suit the application. The unit will now work with this typical sludge calibration.

6.11 CALIBRATION-METHOD 2-SAMPLES

This Method of calibration offers the highest accuracy (and is used by AUTOCAL), since the MSM400 is set up based

on actual site sample analysis. It does therefore require quite a lot of site work in taking samples, and analysing the

solids %, to enter this later into the MSM400 microprocessor memory.

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Under stable operating conditions, the objective is to record the MSM400 attenuation figure, and immediately take a

sample of the slurry present between the sensor faces.This is then analysed in the lab, to derive the solids %, and

this % value is later linked to the previous ultrasonic attenuation. The objective is to take three separate readings and

samples, which are averaged by the Microprocessor.

Preferably the readings should be taken for a slurry concentration that Is as high as possible, to give the best

accuracy for the slope calculation. The three readings are date coded, and can all be separately inspected.

Ensure that the frequency is correct and that access is enabled as above. With the sensor in a stable representative

slurry, note the value of the relevant “Span dB” which is the attenuation due to the suspended solids. This is the

total attenuation minus the zero ref and is available in two parameters, Span dB @ A MHz (D854) for

1MHz

sensor and Span dB @ BMH2 (D855) for 3.3MHz sensors. They are located in Monitor \ Diagnostics \ Sensor.

At the same time take a physical sample of the slurry for laboratory analysis by drying and weighing.

Now enter the value of “Span dB” recorded, in the relevant “Span I @ 1MHz” (P130) or “Span I @ 3MHz”

(P131) parameters. (accessed via Calibration / Manual Entry / Span)

When the laboratory analysis results are available, the span calibration can be completed by entering the solids

content (in % Solids) into “Lab Value 1” (P150). -

(If required, an estimated value can be used until the laboratory analysis results are available.)

For improved accuracy up to three samples can be taken. These should be taken at roughly the same time and the

“Span dB” noted for each one. The values are entered into the relevant Span 1, Span 2, Span 3 and Lab Value 1,

Lab Value 2, and Lab Value 3 (accessed via Calibration / Manual / Entry / Lab Values). The MSM400 will

automatically average as many values as are entered.

The MSM400 stores the calculated value of the slope in 0858 (1MHz) and D859 (3.3MHz) It is recommended that a

note is made of this value. Note that the value of the frequency not being used is displayed as zero.

6.12 ATTENUATION VALUE-METHOD 3

Select the CALIBRATION /Manual Entry / Sensor to access the dB FACTOR value. This is the attenuation in dB per

percent solids for the size/type of sensor and the slurry in use. Typically this data would have come from another

installation of the same type, or previous data on this installation, read from the Diagnostic Display Data screens.

Enter the numerical value required.

NB: It Is advisable to recheck the zero setting on the plant periodically (Every 6 months at least).

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7.0 PROGRAMMING THE MSM400 FUNCTIONS

DUTY (MODE)

DESLUDGE MODE.

There are several methods of starting, stopping, overriding and stopping early a de-sludge operation. The desired

options can be selected in the SETUP – DUTY (Mode) – DESLUDGE menu. The following table explains the various

options.

(PV = process value i.e. % suspended solids)

Start on

Stop on

Stop if

Do not start if

PV above level*

Digital i/p 1 low ***

Time

PV below level**

Digital i/p 1 low ***

Max Time

PV below level**

Digital i/p 1 low ***

Digital i/p 2 low****

Normally relay 1 is used for control purposes. Relay two is normally the alarm relay.

If selected, the desludge operation defaults to “Start on”– Time, “Stop on”– PV below a level.

“Do not start if” and “Stop if” are set to “none” (i.e. in default conditions these do not affect the desludge

operation).

Above level is above Relay 1 or 2 On Point

***

Below level is below Relay 1 or 2 Off Point

Digital input 1 low for 1 sec, 2 sec, 5 sec, 10 sec, 15 sec, 20 sec, 30 sec, 40 sec, 50 sec, 60 sec, 90

sec, 120 sec, 180 sec, 240 sec & none

**** Digital input 2 low for 1 sec, 2 sec, 5 sec, 10 sec, 15 sec, 20 sec, 30 sec, 40 sec, 50 sec, 60 sec, 90

sec, 120 sec, 180 sec, 240 sec & none

The min and max times described in Set point operation also apply in de-sludge mode.

If it is required to set the control unit up to Start on Time then 4 parameters can be set up:-

Start time 1

Time interval 1

Start time 2

Time interval 2.

(Start time 2 and interval 2 default to not used.)

The time interval indicates the interval between de-sludges.

Start time 1 indicates the time of the first de-sludge operation. A de-sludge will always happen at this time each day

independent of the time interval.

Start time 2 indicates the time of another fixed de-sludge time.

If either of the start times are set to 0:00 then the interval associated with that start time is not used.

If both of the time intervals are set to 0:00 then de-sludge only occurs at the start times.

The following table shows the default and limits of the time desludge operations.

No. of operation.

Set in

(hrs & mins.)

hh:mm

Default value

(hrs & mins)

8:00

Max value

(hrs & mins)

23:59

Start time 1

Time interval 1

Start time 2

hh:mm

1:00

0:00

24:00

23:59

Time interval 2

hh:mm

0:00

24:00

Example:

In this example it is required to control the desludge operation as follows: Relay 1 will be used to open a discharge

valve. Desludge cycles should start at fixed intervals. Each desludge cycle should stop on detection of thin sludge,

thus preventing unwanted transfer of clear liquor. The “Stop if” function will also be used to stop the desludge using

a digital input (i.e. an external trigger.). from a pump protection switch if the pump should fail. Typically in this

example the sensor is mounted close to the bottom of a primary tank or in the discharge line.

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Starting desludge

This is controlled by the “Start on” function in the DESLUDGE menu. This should be set to “Time”.

Cycles will begin at “Start Time 1” and repeat at intervals “Interval 1” until “Start Time 2”. After this, cycles will

repeat at intervals “Interval 2”. This allows desludging to be done at different intervals during day and night, for

example.

In the example “Start Time 1” is set to 7:30 and “Interval 1” to 5 hours. This will result in desludge cycles at 7:30,

12:30, 17:30, 22:30 and 03:30

Stopping desludge

This is controlled by the “Stop on” function in the DESLUDGE menu. This should be set to “PV<level” (PV = Process

Variable, normally % solids)

Cycles will stop when the PV is less than “Relay 1 Off Point” in the RELAY menu.

In the example “Relay 1 Off Point” is set to 2%

Emergency stopping of desludge.

This is controlled by the “Stop if” function in the DESLUDGE menu. It should be set to “Ext Trig Xs” and the

external trigger connected to the D1 trigger input. (The X indicates the number of seconds the input must be high to

activate the function)

In the example “Stop if” is set to Ext Trig 2s

Related parameters.

“Relay N Max On Time” and “Relay N Min Off Time” may also be used to modify the basic commands described

above.

Programming procedure.

From the normal display Press any key (except ESC) to access main menu (note; ensure TOGGLE RUN

padlock is open).

Scroll down to the SETUP menu and press ENT.

SETUP

DUTY (Mode)

INPUT

OUTPUT

↓

Scroll down to the DUTY (Mode) menu and press ENT.

DUTY (Mode)

PV CALCULATION

Description

Message

Scroll down to the DESLUDGE menu and press ENT.

DESLUDGE

Start On

Stop On

Do not start if

Scroll down to the Start On menu and press ENT.

Use ⇒ key to highlight the option, scroll down to the Time option and press ENT.

Start On

Time

P250

Press ESC to return to the DESLUDGE menu.

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Scroll down to “Start time #1” and press ENT.

Use ⇒ key to highlight the first digit in the time, scroll up and down to edit the digit. Use the left and right

arrows to move to the next digit (the time is programmed in hours and minutes h : m). When the correct start

time is shown on the display press ENT.

Start Time #1 h:m

7:30 P254

10.

11.

12.

Press ESC to return to the DESLUDGE menu.

Scroll down to “Interval #1” and press ENT.

The interval is the time that the control unit waits between the end of one desludge and the start of the next.

To set the interval use ⇒ key to highlight the first digit in the interval, scroll up and down to edit the digit.

Use the left and right arrows to move to the next digit (the time is programmed in hours and minutes h : m).

When the correct interval is shown on the display press ENT.

13.

14.

15.

16.

17.

18.

Press ESC to return to the DESLUDGE menu.

Scroll to “Stop on” and press ENT.

Use ⇒ key to highlight the option, scroll to the “PV<level” (P251) option and press ENT.

Press ESC to return to the DESLUDGE menu.

Scroll down to “Stop if” and press ENT.

Use ⇒ key to highlight the option, scroll down to the “Ext Trig Ns (P252)” option and press ENT. Where N =

the number of seconds that the digital input must be active before the control unit stops the desludge. This

value is chosen from a list by scrolling, picking the desired time and pressing ENT.

Stop if

Ext Trig 2s

P252

The times available are digital input 1 active for 1 sec, 2 sec, 5 sec, 10 sec, 15 sec, 20 sec, 30 sec, 40 sec, 50 sec,

60 sec, 90 sec, 120 sec, 180 sec, 240 sec & none.

19.

20.

21.

22.

23.

24.

25.

26.

Press ESC three times to return to the SETUP menu.

Scroll down to OUTPUT and press ENT.

Scroll down to RELAY and press ENT.

Scroll down to “RELAY 1 Mode” and press ENT.

Use ⇒ key to highlight the option, scroll down to the “Desludge” (P410) option and press ENT.

Press ESC to return to the RELAY menu.

Scroll down to RL1 Off Point and press ENT.

Use ⇒ key to highlight the first digit to be edited, scroll up and down to edit the digit. Use the left and right

arrows to move to the next digit (the off point is programmed in % suspended solids). When the correct value

is shown on the display press ENT.

27.

28.

Return to the TOGGLE RUN menu and lock the padlock by pressing enter.

The system is now in desludge mode.

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7.1

7.2

OUTPUTS

CURRENT OUTPUT

The operation of the current output is set up by four different parameters and is always controlled by the process

variable (PV), which is normally % suspended solids. These are found in SETUP – OUTPUT – CURRENT OUTPUT.

Lower range value (Low range val)

This is the value of PV which corresponds to the minimum current output, either 0 or 4mA

Upper range value (Up range val)

This is the value of PV which corresponds to the maximum current output, 20mA.

Alarm action

This is the value to which the current output is driven under alarm conditions and is selectable from a list.

•

3.6mA

21mA

Hold (i.e. hold last reading)

For alarm conditions see the section below titled ALARM.

0-20mA or 4-20mA setting (0/4-20mA)

This parameter sets the current output range to either 0-20mA or 4-20 and is selected from a list.

If required the 4-20mA can be trimmed using an external calibration meter. (For details see Section 7.8)

7.3

RELAY OPERATION

The MSM400 controller offers various options for operating the relays.

There are 2 relays that are programmable to different modes, set point operation, de-sludge, alarm and fault. The

mode of operation is selected through the SETUP – OUTPUT – RELAY – Relay Mode menu. The default mode for

Relay 1 is set point operation and Relay 2 default mode is alarm.

a) SET POINT OPERATION

It is possible to program both relays for set point operation. These are found in SETUP – OUTPUT – RELAY. The

process value (PV) controls the relays.

Relay on point (RL* On Point)

This is the value of PV at which each relay will turn on

Relay off point (RL* Off Point)

This is the value of PV at which each relay will turn off

Relay minimum on time (RL* Min ON)

This is the minimum time that the relay will stay on for and this takes priority over the maximum on time.

Relay maximum on time (RL* Max ON)

This is the maximum time that the relay will stay on for.

It is important to note that this function only operates when the minimum off time is set to a non zero

value.

Relay minimum off time (RL* Min OFF)

Once the relay has turned off this is the minimum time before the relay will turn on again.

(*=1or 2 i.e. relay one or two)

If both on and off parameters are set to zero then relay is turned off.

If the on and off points are equal (non-zero) the relay is on when PV is above the set point and off when below.

If both minimum and maximum on times are set to zero (default) then they are not used.

(See also the example in “NAVIGATION IN THE MENU SYSTEM”).

b) DESLUDGE

When in desludge mode the relays operate as explained above.

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c) ALARM

The relays can be set for alarm mode conditions by selecting the option in SETUP – OUTPUT – RELAY – Relay *

mode. See the section below titled ALARM.

7.4

ALARM

There are six different alarms in the SETUP - OUTPUT - ALARM menu. Each alarm can be set to operate a relay, or

drive the current output, or both, or neither to the following states.

Current output - 3.6mA, 21mA, Hold as defined in “Alarm action” in the CURRENT OUTPUT menu.

Relay outputs – The relays energise in the alarm condition

The relays or current output must be set up for alarm or fault action for this function to operate. The effects of each

alarm action are shown in the list below :

Memory fault

PV out of limits

Current saturated

Temperature out of limits - this refers to the temperature within the control housing.

Digital input 1 active

7.5

DISPLAY

The display has 3 sections which can be programmed to display a selection of variables. Each section has a

parameter which is used to select the variable which is displayed. They are located in SET-OUTPUT-DISPLAY. The

required option is selected from the list as shown below.

11:59 0

←−− UPPER DISPLAY

■

12.35

MIDDLE DISPLAY

←−−−−−−−−−

ꢇꢇꢇꢇꢇꢇꢇꢇꢇꢇꢇꢈ

←−−−−−−−

LOWER DISPLAY

Display option parameter number

Description

D800

D801

D805

D806

D821

D822

D844

D850

D851

D860

P730

P731

Bargraph

PV process value

Sludge density

% Current out

Current output (mA)

RL1 run time

RL2 run time

Control unit temperature

Attenuation at 1 MHz

Attenuation at 3.3 MHz

Sensor frequency

Date

Time

Please note that the bargraph only works on the

lower display and it shows % current output.

7.6

BACKLIGHT

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The display has a backlight, which can be set to On, Off or Auto. When set to Auto the backlight automatically turns

off after a few minutes if no keys are pressed.

7.7

ENGINEERING

FREQUENCY SET

The frequency of operation is normally set automatically. Under certain conditions it may be advantageous to force

the control unit to operate at either 1 MHz or 3.3 MHz. This should not be done without consulting the factory.

7.8

SYSTEM

TEST – CURRENT OUTPUT

The current output is calibrated in the factory and should not require any adjustment. However, if required, it is

possible to adjust the 4mA and 20mA points using a calibrated meter. This is done by following the procedure below.

Connect a millammeter to the current output terminals (No. 16 and No. 18).

Ensure the toggle run padlock is open.

Access the SETUP – SYSTEM – TEST – CURRENT OUTPUT MENU.

Select either the “4mA out adjust” or the “20mA out adjust” and press ENT.

Read the actual current on the calibrated meter.

Enter this value in the chosen parameter and press ENT.

Check that the actual current is now exactly 4mA or 20mA.

For diagnostic purposes the current output can be driven to any value between 4mA and 20mA (SETUP – SYSTEM –

TEST – CURRENT OUTPUT – Set current). With a suitable meter connected to the current output terminals a value

can programmed on the control unit and the same value will appear on the meter.

This programmed current will remain until the toggle run padlock is closed.

SETTINGS

Keypad sound

The keypad sound can be turned on or off according to the users preference. It is controlled by SETUP – SYSTEM –

SETTINGS – Keypad sound.

IP258

8.0 HART SMART Communications

The MSM400 is compatible with the HART digital signalling system, either as well as the 4-20 mA output , or on a

Bus system. MSM400 supports Version 5.x of the HART protocol, and is fully supported by the MOBREY CK-1 HHC

(Hand Held Communicator) and by the UNIVERSAL 275 HHC. It is normally necessary to load the Universal HHC

with the transmitters Device Description to access anything more than the basic transmitter information-contact

Mobrey Measurement for details. The MSM400 can also communicate with the MOBREY H-View PC based system.

Normal requirements of the loop impedance apply to allow the HHC to communicate properly. The MSM400 has a

built in 270 ohm load, which can be selected if required-see section 4.6. This section also shows the special

terminals in the MSM400 terminal compartment available for connection of a HHC across the current output. The

MSM400 Cn number in relation to HART circuits is 1.

Please consult the HHC manual to see how to interrogate the Universal and Transmitter specific parameters.

The HART messages and Transmitter/Sensor ID Numbers are accessed and set up (where allowed) by the operator on

the INFORMATION Structure, APPLICATION+CONTROL UNIT+SENSOR screens. Some of this data is factory preset,

and is not alterable, to make the MSM400 identifiable to Universal communicators. But the main Description, Tag

Number and Message should be used to identify the equipment and the actual site application for site operator use.

The Normal Universal Commands are always available over the HART interface---

PV-Process Value

% of current output (% of FSD)

Actual mA current output being transmitted

Alarms active

Temperature (inside the electronics housing)

PV for 0 or 4 mA output as programmed

PV for 20 mA output as programmed

PV units of measurement

Time Damping used on the measurement

Description (Customer supplied)

Message (Customer supplied)

Tag Number (Customer supplied)

MAINTENANCE / INSPECTION

9.1

Spares

The MSM400 is a factory built in instrument and apart from the mains fuse there are no spare parts that can be

fitted in the field. Should the MSM400 require any repair or replacement parts, it must be returned to Mobrey

Measurement for action.

CONTROL UNIT

No maintenance is required beyond occasional cleaning of the enclosure with a damp cloth. Solvents or bleaches

should not be used. The fuse may only be replaced with the same type and rating. Do not modify or attempt to

repair the unit.

SENSORS

No maintenance is required beyond occasional cleaning. The frequency of cleaning will be determined by

experience. A message warning that cleaning is required may be generated when performing routine zero

calibrations. Refer to Section 6.1

IP258

APPENDIX A1

FULL MENU STRUCTURE - LOCATION OF PARAMETERS

MAIN MENU

SUB MENU 1

SUB MENU 2

PARAMETER DESCRIPTION

Par No.

TOGGLE RUN

Toggle

CALIBRATION

(specific)

AUTOCAL

SET ZERO

L125

L126

L127

SET SPAN

LAB VALUES

Max % solids

MANUAL ENTRY

SENSOR

Sensor Gap

Sludge Type

P100

P101

P102

P103

P120

P121

P122

P123

P124

P130

P131

P132

P133

P134

P135

P140

P141

P142

P150

P151

P152

P160

P200

P201

P240

P241

P242

P250

P251

P252

P253

P254

P255

P256

P257

P300

P301

P302

P400

P401

P402

P403

P410

P411

P412

P413

P414

P415

P420

P421

P422

P423

P424

P425

dB Factor @ 1MHz

dB Factor @ 3MHz

Zero Ref @ 1MHz

Zero Ref @ 3.3MHz

Date of Zero Ref

Initial Zero Ref @ 1MHz

Initial Zero Ref @ 3.3MHz

Span 1 @ 1MHz

Span 1 @ 3.3MHz

Span 2 @ 1MHz

Span 2 @ 3.3MHz

Span 3 @ 1MHz

Span 3 @ 3.3MHz

Date for Span 1

Date for Span 2

Date for Span 3

Lab Value 1

Lab Value 2

Lab Value 3

Max % Solids

PV Units

Density Units

Description

Message

Tag

Start On

Stop On

ZERO REF

SPAN

LAB VALUES

SETUP

DUTY (Mode)

PV Calculation

DESLUDGE

Do not Start if

Stop If

Start Time #1

Interval #1

Start Time #2

Interval #2

Serial Number 1

Type 1

Damping 1

INPUT

SENSOR INPUT

OUTPUT

CURRENT

OUTPUT

Lower range value

Upper range value

Alarm action

0-20mA/4-20mA

Relay 1 mode

Relay 1 On Point

Relay 1 Off Point

Relay 1 Min On Time

Relay 1 Max On Time

RL 1 Min Off Time

Relay 2 mode

Relay 2 On Point

Relay 2 Off Point

Relay 2 Min On Time

Relay 2 Max On Time

RL 2 Min Off Time

RELAY

IP258

MAIN MENU

SUB MENU 1

SUB MENU 2

PARAMETER DESCRIPTION

Par No.

SETUP (Contd)

ALARM

Memory Fault Alarm

PV Out of Limits

Current Saturated

Temperature Out of Limits

Logging Memory Filling

Digital Input 1 Active

Display Select 1 (upper)

Display Select 2

Display Select 3

Backlight On/Off

Interval

Fast Log Select

Overwrite Old

Frequency

Min dB

Max dB

P540

P541

P542

P543

P544

P545

P570

P571

P572

P575

P590

P591

P592

P630

P640

P641

P642

P700

P701

P702

P730

P731

P735

D750

D751

D752

D753

D760

D761

D762

D763

D764

D765

D800

D801

D805

D806

D810

DISPLAY

LOGGING

ENGINEERING

(setup)

SENSOR LIMITS

Sensor Dirty Threshold

SYSTEM

TEST CURRENT OUTPUT 4mA output adjust 1

20mA output adjust 1

Set Current 1

Date

Time

Keypad Sound On/Off

Model Code

SETTINGS

FIXED

Serial Number

Hardware Version

Software Revision

Manufacturer’s Code

Unique ID

Universal Command Rev

TS Command Rev

Preamble Bytes

Flags

PV(process variable)

SV (Sludge Density)

% Current Output 1

Current Output 1

Totaliser

HART

MONITOR

READINGS

RELAY

RELAYRUNTIMES Relay 1 Run Time

D821

D822

D830

D835

D844

D850

D851

D852

D853

D854

D855

D856

D857

D858

D859

D860

D861

Relay 2 Run Time

ALARM REPORT

Sensor

DIAGNOSTICS

Digital input status

Temperature

Attenuation @ 1MHz

Attenuation @ 3.3MHz

Attenuation unsmoothed

Signal level (Raw A/D bits)

SpanAverage @ 1MHz

SpanAverage @ 3.3MHz

Sample Average @ 1MHz

Sample Average @ 3.3MHz

Slope 1

Slope 3

Frequency of operation

Max. density measurable

IP258

APPENDIX A2: FULL LIST OF FUNCTIONS

Parameter list and description

P=Parameter,

D=Diagnostic Display Parameter

Parameter

No.

Description

Min

value

Max

value

Default

Ex-Factory

P100

Sensor Gap in mm.

This is a user entered parameter (optional).

This value is ignored when an alternative span

calibration is caried out (i.e. method two or three).

Sludge type

1000

0.0

P101

The user can select from a list of sludge type to set

up the span for the calibration procedure (optional).

Each sludge type is associated with an attenuation

factor for each frequency. This value is ignored when

an alternative span calibration is caried out

(i.e. method two or three).

none

P102

P103

P120

dB Factor @ 1MHz

A user alterable parameter. This is the attenuation

number in dB/% at 1MHz. This is used for the span

calibration (method three).

0.000

dB Factor @ 3.3MHz

A user alterable parameter. This is the attenuation

number in dB/% at 3.3MHz.This is used for the span

calibration (method three).

Zero Ref @ 1MHz

This is the value in dBs (@ 1MHz) that is stored in

the control unit when a zero calibration is carried out.

This value is over written each time a zero calibration

is carried out.

P121

Zero Ref @ 3.3MHz

This is the value in dBs (@ 3.3MHz) that is stored in

the control unit when a zero calibration is carried out.

This value is over written each time a zero calibration

is carried out.

P122

P123

Date of Zero Ref

This is automatically stored by the control unit when

the zero calibration is done. The actual date can be

set-up in the ENGINEER menu (P730)

Initial Zero Ref @ 1MHz dB’s

--/--/----

This is the value in dBs (@ 1MHz) that is stored in

the control unit when the initial zero calibration is

carried out.This value is compared with subsequent

zero calibrations.0 must be entered to reset or clear initial

zero value

P124

Initial Zero Ref @ 3.3MHz dB’s

This is the value in dBs (@ 3.3MHz) that is stored in

the control unit when the initial zero calibration is

carried out.This value is compared with subsequent

zero calibrations.0 must be entered to reset or clear initial

IP258

Parameter

No.

Description

Min.

value

Max.

value

Default

Ex-Factory

P130

P131

P132

P133

P134

P135

P140

P141

P142

P150

P151

P152

P160

P200

Span 1 @ 1MHz

Measured attenuation

0.0

Span 1 @ 3.3MHz Measured attenuation

Span 2 @ 1MHz Measured attenuation

Span 2 @ 3.3MHz Measured attenuation

Span 3 @ 1MHz Measured attenuation

Span 3 @ 3.3MHz Measured attenuation

Date for Span 1

Date for Span 2

Date for Span 3

Lab Value 1

Lab Value 2

Lab Value 3

Max % Solids

PV Units

The PV units can be selected from a list

(%, kg/hr, lb/hr,g/l, ppm, None)

Density Units

P201

P240

Description

16 character user-defined description of application, say.

Message

MSM400 MONIT

P241

P242

User set up message for HART info

Tag Number - Control Unit

User-defined alpha-numeric entry up to 32 characters in

accordance with HART. May be entered by keypad.

Start On

This parameter is used to set up the mode of start

for a desludge operation and is selected from a list

(Time, PV, Ext. Trig)

32 Chars

MSM40055

P250

P251

P252

none

Stop On

This parameter is used to set up the mode of stop

for a desludge operation and is selected from a list

(Time, PV, Ext. Trig)

none

Do not Start if

This parameter is used to set up the mode 'do not start if'

for a desludge operation and is selected from a list

(Light sludge, Ext trigger)

not used

P253

Stop If select from list

This parameter is used to set up the mode 'stop if'

for a desludge operation and is selected from a list

(Light sludge, Ext trigger)

not used

P254

P255

P256

P257

Start Time #1

The time of day that the first desludge cycle starts

Interval #1

The time interval for the first desludge cycle

Start Time #2

The time of day that the second desludge cycle starts

Interval #2

The time interval for the first desludge cycle

Max retries

Sensor Serial Number

User-settable

00:00

23:59

7:00

1:00

00:00

23:59

Not implemented

P258

P300 P

P301 P

P302

Sensor Type

dB Damping

IP258

Parameter

No.

Description

Min.

value

Max.

value

Default

Ex-Factory

P400

P401

P402

Lower range value

The mA set point for minimum PV in selected units

Upper range value

The mA set point for maximum PV in selected units

Alarm action

auto

The is the value that the current will drive to on alarm

action. The alarm action is programable and is selected

from list (3.6/21mA/hold last reading).

0-20mA/4-20mA

The mA output is selectable by user,

either 0 or 4 to 20mA

hold

P403

P410

P411

P412

P413

4-20mA

Relay 1 Mode

Select Relay function from a list (Off, Set Point,Desludge

Alarm, Totaliser, Fault)

Relay 1 On Point

The value of the variable (as set in relay mode parameter)

at which relay 1 turns on. Programmable by user

Relay 1 Off Point

The value of the variable (as set in relay mode parameter)

at which relay 1 turns off.

set point

Relay 1 Min On Time

A programmable parameter for the minimum on time

of relay 1. This is to overcome slugs of clear liquor at

the start of desludge cycles

0:00

999.59

000:00

P414

Relay1 Max On Time

A programmable parameter for the maximum on time

of relay 1. This is to ensure, for example, a pump does

not continue to run due to a faulty signal from sensor.

Relay 2 Mode

Select Relay function from a list (Off, Set Point,Desludge

Alarm, Totaliser, Fault)

0:00

999.59

000:00

P420

P421

P422

P423

set point

Relay 2 On Point

The value of the variable (as set in relay mode parameter)

at which relay 2 turns on. Programmable by user

Relay 2 Off Point

The value of the variable (as set in relay mode parameter)

at which relay 2 turns off. Programmable by user

Relay 2 Min On Time

A programmable parameter for the minimum on time

of relay 2. This is to overcome slugs of clear liquor at

the start of desludge cycles

0:00

999.59

000:00

P424

Relay 2 Max On Time

A programmable parameter for the maximum on time

of relay off. This is to ensure, for example, a pump does

not continue to run due to a faulty signal from sensor.

Relay 1 Min Off Time

0:00

999.59

000:00

P415

P425

Relay 2 Min Off Time

IP258

Parameter

No.

Description

Min.

value

Max.

value

Default

Ex-Factory

P540

P541

Memory Fault Alarm

If the control unit detects a memory fault

PV Out of Limits

If the Pv is out of limits then an alarm can be reported by

a relay, current output or by both

Current Saturated

If the current is saturated is out of limits then an alarm

can be reported by a relay, current output or by both

Temperature Out of Limits

both

none

P542

P543

If the temperature is out of limits then an alarm can be

reported bya relay, current output or by both

Digital Input 1 Active

none

P545

P570

Display Select 1 (upper)

This parameter designates what is shown on the upper

display and can be selected from a list (PV, %, clock)

Display Select 2 (mid)

This parameter designates what is shown on the mid

display and can be selected from a list (PV, %, clock)

Display Select 3 (lower)

- Time

- PV

P571

P572

This parameter designates what is shown on the lower

display and can be selected from a list (PV, %, clock)

Backlight On/Off

- bar graph

P575

P630

Set Frequency of Operation

High, Low or Auto

P640

P641

P642

Min dB

Max dB

Sensor Dirty Threshold

A user alterable value in dBs.The control unit

compares successive zero calibrations and if the

difference exceeds this value then the control unit

displays the warning 'CHECK SENSOR CLEAN'.

4mA output adjust

Factory calibrated. The user can adjust the 4mA output

via the up down arrows

20mA output adjust

P700

P701

P702

735

3194

Factory calibrated. The user can adjust the 20mA output

via the up down arrows

Set Current

Force current to a value to check loop equipment

Date

Time

P730

P731

IP258

Parameter

No.

Description

Min.

value

Max.

value

Default

Ex-Factory

D750

D751

Model Code Hart parameter

Serial Number - Control Unit

Store as Final Assembly Number (FAN)

Hardware Revision

Factory-set

Software Revision

Factory-set, embedded in software

Manufacturer’s Code

Factory set not atlerable

Unique ID

Hart parameter

Universal Command Revision

Hart parameter

D752

D753

D760

D761

D762

D763

D764

Transmitter Specific Command Revision

Hart parameter

Preamble Bytes

Hart parameter

D765

D800

D801

D805

D806

D810

D820

D821

D822

D830

D835

D841

Flags Hart parameter

Sludge Density

% Current Output

Current output

Totaliser Value

Relay Status

Current is proportional to PV

Relay 1 Run-Time

Relay 2 Run-Time

Resettable - Hours & Minutes

Alarm report e.g. Sensor Fault, ….

Digital input status

Current input

Value of current input (mA)

Temperature

D844

The temperature ^oC within the control unit

Attenuation @ 1MHz Attenuation

D850

D851

D852

D853

Attenuation @ 3.3MHz

Attenuation unsmoothed

Signal level (Raw A/D bits)

Raw RF A/D output

Span Average @ 1MHz (dB)

Diagnostic parameter that averages the span calibrations

Span Average @ 3.3MHz

Attenuation

D854

D855

D858

Diagnostic parameter that averages the span calibrations

Slope 1

The value of the attenuation in dB/% @ 1MHZ

determined by the control unit.

D859

Slope 3

The value of the attenuation in dB/% @ 3.3MHZ

determined by the control unit.

Frequency of operation

Diagnostic of frequency(ies) being used (MHz)

Maximum density

D860

D861

The maximum density that can be measured.

This value is calculated from zero and span data.

IP258

APPENDIX A3 : HART and PSION Operating Instructions

1.0. HART CONSIDERATIONS

Special Considerations for HART

If the HART communications facility built into the control unit will be used at the time of installation or

during its future working life, then it is essential that a resistive load of at least 250 Ohms is connected in the

supply cable. This may be provided by other devices in the loop (Chart recorder, meter, etc.) or more usually

by installing a standard 270 Ohm 0.25W resistor in series with control unit. In this way the master device will

be able to signal to the control unit without the power supply short-circuiting the data.

In addition, excessive cable capacitance will attenuate the HART signalling and so the capacitance must

anyway be limited if HART communications is to be used. The RC time constant for the network must not

exceed 65µs, e.g. if the network resistance is, say, 650Ω then the maximum network capacitance is 0.1µF.

HART transmitters are often given a Cn number where n is the multiple of 5000pF which the device presents

to the network. In the case of MSM400 the value of n is 1 since its capacitance is below 5000pF.

Total loop resistance and capacitance

Additional equipment such as indicators or recorders may be inserted in the loop subject to the resistance and

capacitance limits discussed above.

Cable trays

It is recommended that HART signal cables are not run alongside power cables.

1.1

Multi-drop installations (MSM400 in HART digital mode)

Up to 15 transmitters may be connected in parallel with each other, and each must be set to a different

HART address between 1 and 15. When HART transmitters are connected in multi-drop mode, each control

unit draws a fixed current of 4mA.

Compatibility with other HART instruments.

Any HART instrument, regardless of the manufacturer, may be connected in parallel with another to create a

multi-drop network. They may be combined with separately powered, current sourcing or sinking devices but

care must be taken to ensure that the HART signal current passes through the 250W minimum impedance to

establish communications. For full details of HART instrument availability, refer to the HART Communication

Foundation publications or individual manufacturers' literature.

Handheld Communicators

A handheld communicator (HHC) may be connected across the network (downstream of the minimum 250

Ohm loop resistance) to programme or interrogate a HART control unit. Some HHC’s support only a subset of

a transmitter’s functions, and will thus only access the control units Universal and Common Practice

commands. However, the MSM400 is fully supported by the MOBREY-CK1 HHC and by the UNIVERSAL 275

HHC (provided the 275 is loaded with the transmitter’s Device

Description – contact Mobrey Measurement or the HART Communications Foundation for details).

IP258

2.0

SMART COMMUNICATION WITH THE MOBREY MSM400

With a SMART HHC, you can make adjustments and calibrate your MSM400 at any point on the two wire

connection to the control unit. You can also make many other adjustments and obtain operational and

diagnostic information using the HHC.

Alternatively, Mobrey have a PC based software package called Mobrey H-View which allows you to make

adjustments and obtain readings through a standard PC. Contact Mobrey or your local agent for details.

If you have a Mobrey type CK HHC (Psion Organiser based) and the appropriate datapak, refer now to

Appendix D for details of assembly, connection and menu structure before reading on to the specific

adjustments listed below.

If you have another type of SMART communicator or computer based software tool, you must ensure that the

MSM400 Device Description (DD) is correctly loaded or compiled to gain access to all of the MLT parameters.

If you do not have the MSM400 DD loaded, you will only be able to access the Universal and Common

Practice commands.

Contact or any other HART Host Subscriber to update your communication device with the latest MSM400

DD.

The MSM400 control unit is a SMART instrument using the HART protocol to communicate with external

devices.

The Mobrey HHC is a hand-held organiser based communication device fitted with a HART interface to allow

communication with Mobrey HART instruments.

By connecting the HHC across the two wire loop at any point downstream of the minimum 250 Ohm loop

resistance, communication can be established. The MSM400 has integral test pins provided for this purpose.

Refer to Appendix D3.0 for details of HHC connection and operation.

The following paragraph details how to re-range and change damping using the HHC once communication

with the MSM400 has been established.

2.1

Calibration adjustments at operating conditions.

Important note : Making changes to the position or span of the 4-20mA range with a communicator can cause

the control unit to make step changes in the output. You should arrange to set your plant control loop to

“Manual” before making changes if this could be a problem.

4mA point – from the “Program” menu / “Calibrate” sub-menu, access Parameter P500. The factory default

value is “0”.

Enter the desired new value of the PV (Process Value), normally the sludge level in % solids, required to give a

4mA output, and confirm when prompted by pressing the “exe” key that this is correct. The new value is now

entered and saved.

Note, the 4mA point can be positioned above the 20mA point to reverse the operation of the control unit,

thus giving a falling current output with rising sludge level.

20mA point – from the “Program” menu / “Calibrate” sub-menu, access Parameter P501. The factory default

value is “A”. This represents “Automatic” and in this case means that the 20mA point is automatically set to

the maximum range of the control unit.

Enter the desired new value of the PV (Process Value), required to give a 20mA output, and confirm when

prompted by pressing the “exe” key that this is correct. The new value is now entered and saved.

Damping – from the “Program” menu / “Engineer” sub-menu, access parameter P625. The factory default

value is 5s.

Enter the desired new value in seconds and press “exe” to confirm and save the new value.

IP258

2.2

Further customisation using the SMART HHC

There are some other features of the control unit that can be changed at this stage:

Identity

The following parameters can be recalled from the “Info” menu, and those shown * below can be site

configured :-

P701

P710

P700

P702

P722

P760

P660

MESSAGE

TAG

*general purpose 32 character message

*control unit identifier (8 characters)

*E.G. control unit application or location (16 char)

Automatically updated on exit if changes made

Factory set – hardware assembly number

Factory set – LVDT serial number

DESCRIPTION

DATE

FINAL ASSY No.

SENSOR SERIAL No

PASSWORD

* 3 level password system.

Simply enter any message or tag number as appropriate and the control unit will retain this information in

memory for future identification. This is particularly useful if you are likely to interrogate the control unit

using the HHC from a remote location.

Refer to Appendix D for more detailed information.

Units of Operation and Display

The units displayed on the display or the HHC when used can be changed from the default “%” using P610

accessible through the “Program”Engineer sub-menu.

IP258

Appendix D

HANDHELD COMMUNICATOR – MOBREY – CK*

D.1.0. Hand Held Communicator – Assembly Instructions

The MOBREY-CK* SMART Hand Held Communicator is supplied as a kit of items (Figure DI) which are

assembled as follows:

D.1.1 Remove the lower sliding cover (1) of the Psion organiser (2) completely to expose the battery compartment lid

(3) at the base of the keypad, and the two slots for Datapaks behind the right hand side of the keypad.

D.1.2 Remove the lower of the two blank Datapak mouldings and insert the preprogrammed Mobrey SMART Datapak

(4), pressing the unit home. This lower slot is the “C” slot in Psion Organiser memory.

D.1.3 Remove the battery compartment lid (3) and insert the 9V battery (5), positive terminal first. Replace the

battery compartment lid (3) and the lower sliding cover (1) over the base of the Psion Organiser. Leave the

keyboard exposed.

D.1.4 At the top of the Psion Organiser above the LCD, slide the cover across to the right to expose the connector.

Insert the MOBREY SMART interface unit (6) in this slot.

D.1.5 The lead used to connect the MSM400 cabling is plugged into the MOBREY SMART interface unit. On the

MOBREY-CK1 and MOBREY-CK3 this is via a 3.5mm jack plug. On the -CK2 a multi pin plug is used. The

latter also has the hook-on connectors built into the leads instead of push on crocodile clips.

D.1.6 The MOBREY SMART Interface Unit has another socket at the top left hand side for connection of a standard

Psion external power unit as an alternative to battery operation.

D.2.0. Notes

D.2.1 Although it is possible to insert two Datapaks into the HHC, this is not recommended as a conflict between

them can occur.

D.2.2 The MOBREY-CK* Datapaks enable communication with both MSP100 ultrasonic level transmitters and

MSM400 displacement level transmitters, and also gives generic support for all other HART transmitters.

D.2.3 When not in use, remove the Mobrey SMART Interface unit from the HHC to prolong battery life.

D.3.0. Requirements for loop powered SMART Operation (Refer to Fig. DII)

D.3.1 The MSM400 control unit requires a DC supply voltage of 2.5 volts at its terminals for satisfactory operation

(V3).

D.3.2 Resistance between any two SMART Interface connection points must exceed 250 ohms. (R1).

D.3.3 For the minimum DC supply voltage (V1) to be calculated, the voltage drops in the loop at 20mA must be

assessed. The absolute minimum value of V1 will therefore be 7.5 volts, since 5 volts is required for the

voltage drop across R1 at 20mA. (See Note 2 below).

D.3.4 If R1 is 250 ohms or more the SMART communicator can be connected between B1-B2, or C1-C2, or D1-D2

or E1-E2. It is also allowable to connect across the SMART Load resistor R1, on B1-A1, or across any

resistance in the circuit that exceeds 250 ohms.

D.3.5 The current loop load resistance R2 can be considered to be part of the 250 ohms needed as the SMART

Load resistor. In this case R1 + R2 must exceed 250 ohms, and the communicator can be connected

between C1-C2, D1-D2, E1-E2, or C1-A1.

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Fig DII. : Loop diagram

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Fig D1 : MOBREY-CK* HHC assembly

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Technical Notes:

At no time can the SMART communicator be attached across A1-A2, since the DC supply effectively short

circuits the transmitted and returned digital communications signals.

The minimum DC Voltage V1 required for satisfactory 20mA loop operation can be calculated from the

formula –

V1 > 2.5 + V2 + [20 x 10^-3]x (R1 + R2 + R4 +R5)

D.3.6.3.

D.3.6.4.

An alternative way of looking at this voltage requirement is in terms of the maximum loop resistance

that can be tolerated, which has to be less than (V1 – 2.5) x 50 ohms.

The maximum allowable value for V1 is 30 Volts.

The HART protocol itself sets the maximum values that can apply to the loop resistances, labelled R1

to R5.

The total load on the loop (R1 + R2 + R4) must not exceed 1100 ohms.

In addition the maximum length of cable in a loop working on the HART protocol is specified as 3000

metres on a single screened loop cable, or 1500 metres if multicore multi-loop cabling is used.

D.4.0. How to connect the SMART Communicator

Assemble the Psion based SMART Communicator unit as shown in Fig. DI fitting the battery, 100 SMART

Datapak, SMART Interface unit and lead. The push on crocodile clips are optional.

Power the MSM400 Control unit from a DC supply as shown in Figure DII. A 250 ohm (or higher value) load

resistance must be incorporated in the loop.

The SMART Communicator is self powered and draws no current from the loop.

The two wires from the SMART Communicator are interchangeable – it does not matter which way round they

are connected.

These two wires can be connected to the HART test pins inside the lid of the MSM400 control unit, using

the crocodile clips provided on the CK1 or CK3.

Alternatively connection can be made via the crocodile clips or hook on probes to each wire of the 2

wire current loop at a convenient terminal box or strip.

At the control room the two wires can be connected either across the “SMART” Load resistor or between

a terminal on the chart recorder/indicator and the other side of the loop.

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D.5.0. Hand Held Communicator : Operation

Language

Initially the Psion Organiser will power up and display the Psion Copyright message, when the ON button is

pressed. Then a choice of languages will be offered. This applies to the operation of the Psion Organiser

functions only, MSM400 programme, although Datapaks will be available from MOBREY in different

languages.

MSM400 Programme

The main menu selection of the Psion Organiser is automatically amended to include the MOBREY option

when the Datapak is fitted. This cannot be permanently repositioned nor deleted.

Time

The only data in the Psion Organiser used by the MOBREY programme is the date held in the Organiser

memory. On making changes to an MSM400 the date will be stored in the MSM400 control unit

microprocessor, as shown by the Psion Organiser. To set this clock, select TIME, press MODE, select SET, and

use the arrows to select the correct date and time on the display. Then press EXE to start the clock, and ON/

CLEAR to return to the main menu.

Disconnecting SMART Interface

To disconnect the interface unit it is necessary to press down the catch in the top centre face of the unit to

release the lock, when the interface can be pulled vertically away. The Psion programme knows when the

interface is not present and will no longer seek to find an instrument connected – it will only allow OFFLINE

programming. Naturally, no diagnostic parameters are made available.

Note : Programme Lock-up

This will occur if the interface unit is disconnected from the Psion before it has finished all communications,

or as a function of the Psion ON button features. The LCD is frozen:

Reconnect the interface unit, to allow completion of the procedure.

If the Lock-up has occurred after pressing the ON/CLEAR button, it probably results from the Psion

Organiser “CLEAR” function which stops/freezes all programmes running at the time. The programme can be

restarted by pressing any button again (except Q).

If the Lock-up occurs as a result of an incomplete procedure, there is no easy release process. The LCD on

the SMART Communicator is frozen. Once the buffer store for instructions has been filled with 16 command

key instructions, a bell like sound is made when any further button is pressed. The best escape route is to

remove the battery to totally clear the memory of the Psion. Beware that this will also clear the date, diary

and alarm memories of the Psion Organiser itself. Clearing the memory occurs after approx. 30 seconds with

no battery, or immediately on pressing ON/CLEAR after the battery has been removed.

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D.6.0 How to drive a Psion based SMART Communicator

Familiarity with the Psion

The Psion is supplied with several manuals to described its function. The main keyboard functions that are

important are the yellow keys. Press “ON” and see the functions of the arrows to move the cursor around the

selections in the menu. Press “EXE” to see the Psion functions. Note that a short cut to selecting a menu

item is to press the key with the initial letter of the required selection – for example “O” switches the unit

“OFF”.

Note that if the “CALC” option is selected, the keyboard changes from the “Alphabet” marked on the keys, to

the “numbers” and symbols marked above the keys. The Psion selects the expected function required of the

keyboard. This function can be changed back by depressing the “SHIFT” key.

MOBREY Menu

If “MOBREY” is selected from the start up menu on the Psion, by pressing “EXE” the space available in the A

memory of the Psion is checked. If there is insufficient then a message is displayed and the program returns

to the main menu. Data, Note Pad or Diary files in A must be removed to allow the program to run. The

SMART Communicator then establishes whether the SMART interface unit is plugged in or not.

10:41

MOBREY Find Save

Diary Calc Time

Notes World Alarm

When the SMART interface is not connected, the Communicator does not look for an instrument – it offers

OFF-LINE programming.

When the SMART interface is connected to the Psion, on selecting the “MOBREY” menu item the programme

seeks an instrument that is expected to be functioning on a 4-20mA loop (the loop that is expected to be

connected to the SMART interface cables).

MOBREY V3.1

SEEKING INSTRUMENT

PLEASE WAIT

If the loop is not powered, or the interface cables are not properly connected to the loop, or the loop

impedance/resistance values are incorrect, the unit will fail to find the control unit.

NO SINGLE LOOP

INSTRUMENT CONNECTED

RETRY (Y)es or (N)o

Note that if the MSM400 control unit is programmed to respond as a numbered sensor on a multidrop loop, it

will also fail to communicate to the SMART communicator at this point.

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When an MSM400 Control unit is located on the loop, this is identified and further instructions awaited.

MSM400

TAG

FOUND

TANK 1

ACCESS (Y)es or (N)o

Alternatively an Unknown Instrument may have been found, i.e. a HART instrument that is not a MSM400 or

MSP100 or MLT100. This will cause a similar message and prompt to be displayed.

UNKNOWN INSTRUMENT

TAG FLOW1

ACCESS (Y)es or (N)o

In either case pressing “Y” will cause the following prompt to be displayed:

UPLOAD ALL

PARAMETERS

NOW?

(Y)es or (N)o

Pressing “Y” will result in all the parameters being read into the HHC. If “N” is pressed then the delay

imposed by a full upload can be avoided. If parameters in the D240 to D265 and P100 to P104 are accessed

later on all the parameters in that group will be uploaded. Thus only the parameters of interest need to be

uploaded, with the minimum delay. A full upload must be done at some stage if the parameters in the

instrument are saved, printed, or used to program another instrument.

The asterisks show each transfer of digital information. If one transfer is incorrect, or corrupted, the

Communicator will advise and ask for an action decision – an example of one of these error messages

is –

NO RESPONSE FROM

CONTROL UNIT

RETRY (Y)es or (N)o

A retry will attempt to obtain the same data again, whereas the “No” decision will jump that data transfer and

collect the next set of data, to try to gain whatever information is available. The data loaded in the Working

Typically, a full upload data collection time is between 30 and 45 seconds.

The main screen describing the equipment now gives control unit identify information – i.e.

MSM400

TAG TANK ALL

MSM400 XDUCER

ACCEPT (Y)es or (N)o

Line 2 of the display is the Tag number loaded as Parameter 01, and Line 3 is the Description loaded into

P700. If this is not acceptable the program suggests a return to the Psion menu functions. If it is

acceptable, pressing the Y button will give access to the FUNCTION menu of the MSM400 Program. The

MSM400 control unit parameters are now loaded into the SMART Communicator (Psion Organiser) memory in

the WORKING Register.

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Future work on this data can be carried out whilst the SMART communicator is connected to the loop, in

which case all changes will be immediately sent to the MSM400, or after disconnection of the Communicator,

in which case the amended programme will have to be stored in the “OFFLINE” register of the communicator.

The Psion Organiser has four separate registers of data relating to the MSM400 control unit. These registers

are named WORKING, SAFE, OFF-LINE and DEFAULT, and are explained in Section D13.0. All changes and

operations occur in the Working Register, identified by W on the right hand end of line 2 on the display. The

other registers are for storage and transfer of data between transmitters or for reference.

D7.0 Introduction and FUNCTION menu

The microprocessor in the MSM400 control unit retains the calibration required for the particular application

or tank involved, once this has been entered into the memory (EEPROM). On the initial interrogation of the

control unit, this information is transferred to the SMART Communicator using the HART protocol, which

defines the command structure and message format.

When received by the SMART Communicator, these messages are loaded into the WORKING register (which

resides in the Psion Organiser memory), which then adds the descriptions and other information shown on the

4 line liquid crystal display. The operator is presented with the information he requested, in a meaningful

format in relation to the application.

The first selections of the MSM400 control unit programme use a menu structure, where the operator

identifies the part of the programme required from a list of options available. The detailed information under

each menu item can be inspected, after selection, by scrolling through the listing. Each item is given an

identifier in the top right hand corner of the screen, identified by a parameter reference number, to allow

accurate recording of the data interrogated and to simplify communications relating to this data.

The programme is divided into two main sets of data, selected from the FUNCTION menu. The FUNCTION

menu is the first programme screen presented when the data from the control unit is accepted and

interrogation is to begin.

***** FUNCTION *****

Calibration

Monitor Program

Info Toggle access

Help D**

MONITOR – The data presented on selecting MONITOR is the live “read only” information from the control

unit, for example the liquid level in the tank, and the value of the current output. These parameters are

labelled D, for Display information parameters, and are indexed between D200 and D265. The Display

parameters are described and listed in Section D10.0

PROGRAM – The data presented on selecting PROGRAM is the operator adjustable data used to configure the

control unit for the particular application. These are “read/write” parameters, labelled P for Program

parameter, and are indexed from P300 to L104. The Program parameters are described and listed in Section

D10.0

FIXED DATA – These are the MOBREY factory preset display parameters, identifying the equipment type, serial

number, software information, etc.

BACK UP – This menu item controls the transfer of data between registers or a file available in the Psion

Organiser memory: operation is described in Section D13.0.

D** - Allows direct access to a Display parameter by entering the relevant code number.

HELP – The HELP information display screens give some introductory advice on the use of the keys on the

Psion Organiser and the Programme structure.

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D7.1 Monitor/Display Parameters – D**

Access and programme structure

The Display Parameters (D***) are separated into several blocks according to the type of operator read only

information. See menu structure in the main body of the manual.

All the Display parameters can be accessed directly from the FUNCTION menu by selecting the appropriate

identification number, e.g. D240.

ENTER PARAMETER No

D -

The live data recalled on the displays are updated continuously by the SMART Communicator every 0.5

seconds, and so represents the latest available information from the MSM400 control unit. When monitoring

these parameters the Psion Organiser is active and so will not switch itself off (the normal action after 5

minutes without any keyboard input).

Additional messages and codes are displayed in a priority order on the LCD when the Display parameters are

in use, to indicate exceptional tank conditions or operational problems.

D7.2 PROGRAM Parameters – P***

Access and Programme Structure

The PROGRAM Parameters are separated into three blocks. These blocks are available for operator access to

configure the MSM400 control unit as required for the particular application, or adjust the normal mode of

operation of the unit. Access to all the PROGRAM parameters is made via the PROGRAM menu.

The three blocks of PROGRAM parameters are as follows:

MODE – The normal operator adjustments equivalent to desludge setup and current input configuration.

Parameters P300 - L102.

ENGINEER – The more technical operator parameters, establishing response time, alarm delay time and HMI

(keypad sound). Parameters P400 - P562.

OUTPUT – These allow Relay and current output configure.

These PROGRAM parameters are read/write parameters, so that when a particular parameter is recalled its

value can be changed by one of three methods – either entering a new value on the blue numeral key pad, or

on the alphabet keys for a text entry parameter, or by scrolling sideways. Each of the parameters uses only one

of these methods : sideways scrolling is prompted by the appearance of horizontal arrows on line 3 of the

LCD. When the new value is on the display correctly, this is entered using the “EXE” key. The SMART

Communicator immediately then transmits the change to the MSM400 control unit. If the value is incorrect

or the operator wants to revert to the original value, the CLEAR/ON key will reinstate the existing parameter

value on the display, without affecting the MSM400 control unit.

Within the memory of the Psion Organiser there are four separate registers for each of the PROGRAM

Parameters. These registers are known as WORKING, SAFE, OFFLINE and DEFAULT, and are further

described in Section D13.0. All programme changes are made in the WORKING register, and these are the

values sent to the MSM400 Control unit memory. The display can be cycled through the registers by using

the MODE key, and the initial letter of the register currently displayed is shown at the right hand end of the

second line – the same line as the parameter value. Individual parameters can be moved into the WORKING

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WORKING REGISTER

Holds the same value as is currently in the control unit.

SAFE REGISTER

Use as a backup, can only be sent to the same control unit as it was loaded from.

OFF-LINE REGISTER

General purpose register, use to program a control unit offline or transfer data between transmitters of the

same type.

DEFAULT REGISTER

The normal ex-factory values.

When a new value is programmed into certain parameters a warning message OUTPUT MAY BE CHANGED is

displayed with the option to proceed with or abort this change. This may be of importance where the output,

either digital or analogue, is controlling some process, such that a sudden change could cause problems.

D8.0 Keyboard Functions

ON/CLEAR KEY

Aborts data entry if this has been started, else returns to the previous menu.

EXE KEY

When display is read/write parameter, writes the value on line 2 or the list selection on line 3 to the control

unit.

↑ AND ↓ ARROW KEYS

Used to step through a parameter block in numerical order.

MODE KEY

Used to access the WORKING, SAFE and OFF-LINE registers and the DEFAULT value while a read/write

parameter is being displayed. The selected register is indicated by W, S, O or D on the right hand side of

line 2.

← AND → ARROW KEYS

Used to select an item from a list when <> is displayed on the right of line 3.

P*** AND D*** ENTRY

Allows direct access to a parameter via its number. Other parameters in the same group can then be accessed

by the ↑ and ↓ arrow keys.

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HAND HELD COMMUNICATOR REGISTERS

D9.0 SAFE, WORKING, OFFLINE, DEFAULT, Registers

Introduction to Registers

From the FUNCTION screen, whilst interrogating an MSM400 control unit, there is a selection titled

“BACKUP”. This allows the data now stored in the WORKING register (i.e. the MSM400 control unit

data) to be transferred to a separate secure memory, to either retain it while making changes to the

MSM400 control unit (i.e. as a “revert to the original program” insurance data store) or to save it in

memory so that it can be copied or consulted back in the office. The registers available are

WORKING REGISTER

This is literally the work sheet where all work is done – all changes made to the parameters on the

SMART Communicator keyboard are made to the data in the WORKING Register. While the

Communicator is attached across the 4-20mA loop, the WORKING register is exactly the same as the

MSM400 control unit memory, so all changes made to the WORKING register are also made to the

control unit itself. The MSM400 control unit memory and the WORKING register in the SMART

Communicator are identical. If communication between the two units fails, then changes attempted

in the WORKING register will be rejected.

Note : The SMART Communicator can be unaware of changes to the MSM400 control unit memory

made by (a) a Primary Master (such as Mobrey H-View) also attached to this control unit loop, and (b)

the local zero and span on the MSM400.

The data existing in the WORKING register is overwritten (and therefore lost) when new data is

loaded from another register, or when the SMART communicator is reconnected to an MSM400 loop,

because the start up routine will load this new MSM400 memory into the WORKING register. To

save any data that has been entered in an “Off-loop” state (i.e. back in the office) the data must be

held in the OFFLINE register (see below).

It is recommended that the data in the WORKING register is transferred OFFLINE before disconnection

of the SMART communicator from the loop, if it is likely to be needed for reference back in the office.

However, the data in the WORKING register is retained in the Psion memory after this disconnection,

and can still be interrogated until overwritten by new data.

SAFE REGISTER

The SAFE Register is literally a register where the current MSM400 calibration data can be stored and

kept SAFE, while changes are made on the WORKING register and the SMART Communicator is

attached to the loop. If these WORKING register changes then prove ineffective or not required, the

SAFE register data can be recalled into the WORKING register (and therefore to the MSM400 control

unit) to reset all the MSM400 parameters to their original values – i.e. the values in the control unit

when the last “Backup” operation transferring the data to the SAFE register was carried out. The data

in the SAFE register can only be loaded into the WORKING REGISTER when the communicator is

attached to the same MSM400 control unit that was the source of the data – i.e. the control unit with

the same unique identifier (D08). It is not possible to transfer programmes between instruments

using the SAFE register.

The SAFE register is retained even when the Communicator is disconnected from the loop, powered

down, and then reconnected to another loop, collecting new data in the WORKING register. It is not

accessible until the correct control unit loop is interrogated, so that the check on the D08 Unique

Identifier has been satisfied.

OFF-LINE REGISTER

This is the register used for transfer of programmes between one unit and the next, or from a

programme developed on the SMART Communicator at the office desk, stored OFF-LINE and then

down loaded into an MSM400 control unit on the plant later. Such data transfer is achieved by

connecting the SMART Communicator across the relevant MSM400 loop, loading the WORKING

into the WORKING register – this overwrites the previous programme in the MSM400 (both the

control unit memory and the WORKING Register).

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An obvious precaution in the above procedure after loading the WORKING register with the current

MSM400 control unit data, is to transfer this data to the SAFE register in case the OFF-LINE sorted

new programme does not give the expected result – if necessary the MSM400 can be restored to its

original programme status by transferring the SAFE register data to the WORKING register.

The OFF-LINE register is retained when the communicator is disconnected from the loop or powered

down. It is only wiped when a new set of data is transferred to the OFF-LINE register from the

WORKING register.

Only one set of parameters can be stored in the OFF-LINE register at once.

DEFAULT REGISTER

This is the register of all the normal ex factory settings for the MSM400 Control unit. It is a useful

start or reference point for programming any control unit, since the values set in each parameter are

known and only those that need The screens showing the Transfer functions of data between registers

provide step by step instruction for achieving such data transfer . There are also facilities for allowing

the normal interface between the Psion Organiser and a printer or personal computer to provide

output of the MSM400 programme data.

The options presented on the LCD are amended when the SMART Communicator senses that a loop

is not present or the Interface unit is not plugged into the Psion. In such cases OFF-LINE operation is

offered or selected automatically. After changes to the PROGRAM screens which modify data in the

WORKING Register, these changes must be saved in the OFF-LINE Register or to a Data File using the

TRANSFER function.

Loop transfers

The BACK-UP selection on the main FUNCTION menu allows manipulation of the data held in the

various registers. Since all transfers are to or from the WORKING Register, the initial screen

SELECT DATA SOURCE

Safe

Off Line

Working Defaults

File

Immediately transfers data to the WORKING Register if SAFE or OFFLINE are selected. If the

source is a Data File then a location and a File name are prompted for and the data is transferred to

the OFFLINE Register followed by a transfer from OFFLINE to WORKING. This final transfer can be

prevented by pressing “N” when asked to accept that the output may be changed. If the data source

is the WORKING Register, the screen prompts for a full upload if any parameters have not yet been

read then asks for a destination decision.

SELECT DATA

DESTINATION

Safe Off-line

File

To know where to place the data. Transfer to a Data File will prompt for a location and a file name.

The location is either the internal memory at A or a Data or Rampak in the upper side slot which is B.

The filename can be up to 8 characters long. In this case the WORKING Register remains unchanged

after the data transfer.

Please note that Parameters in the range P44 to P69 are not transferred to the WORKING Register in

any BACK-UP data transfer. These parameters are left as set up by the Service Engineer for that

particular control unit.

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D.9.1 Printout or PC transfer of MSM400 programme data

When used “Off-Line” the Hand Held Communicator can be instructed to transfer the programme memory

into a PC or print a list of the parameters and the values in the working register on a paper printer. This is

achieved using the Standard Psion COMMS LINK routines and interfaces.

To send or receive data from a PC the COMMS LINK must be plugged in and connected to the PC port and

the CL program must be running on the PC. See the COMMS LINK manual for further details.

The Psion will set itself up for transfer to or from a PC when this option is selected.

The file name is any valid MS DOS file name including path names and extensions. The PSION/HART

program restricts the length of the input to 17 characters.

The actual transfer to a PC is a complete list of parameter numbers (P100 and P761), of the memory

values in the WORKING register. Certain parameters have numeric codes to identify the option

(normally chosen in text, such as LINEAR or HOLD). Do not modify this data while it is in the PC file.

To printout the parameter list the COMMS LINK must first be set up to match the requirements of the

attached printer with regards to the Baud Rate, start bits, stop bits and protocol. To test the printer

and get the desired settings, use the AUTO function in the SETUP menu, and experiment with the

HAND settings, try XON + DTR first.

The printout includes the parameter number, title and value of all the valid parameters in the range

P100 and P761. Where necessary the value will be related text instead of the value in the data file,

e.g. “HOLD” instead of 2.

D.9.2 Display of Parameter Data

The four different registers relate only to the \Programmed Parameters in the MSM400 memory.

When interrogating an MSM400 control unit, a typical parameter display would show:

STANDING VALUE P***

**** **

VALUE OF PV

AT ZERO LEVEL

The W shown on the second line right hand end indicates that this displayed value is the value present

in the WORKING register. This can be compared with the SAFE, OFFLINE or DEFAULT equivalent values

by pressing the “MODE” button, which cycles through these registers. The data displayed is labelled

with the initial letter of the register selected. This is useful for comparing transmitters (between W and

O) or noting changes on this control unit (Between W and S). A transfer of this single parameter can be

made into the WORKING register by pressing “EXE” when the desired alternative register value is

shown on the LCD – the display will show the letter changing to W to acknowledge the transfer.

D.10.0ERROR MESSAGES ON THE HHC

D.10.1Alarm and Error Messages

Throughout the programming of the MSM400 Control unit using the SMART Communicator, any failure

of a communication message or other problem in the SMART interface will be advised with a message

on the Liquid Crystal Display. Certain error messages prompt for an operator input or decision, for

example, whether the procedure should be repeated. These need simple “Yes” or “No” responses.

Other errors, for example, “No response from control unit” when programme parameters are being

changed, will produce a reset of the parameter value back to the original value in the WORKING Register.

In the first interrogation of the control unit, each asterisk shown on the LCD represents a message,

which can contain up to 10 parameters. In the event of a failure of this communication, the option of a

retry or move to the next set of parameters is offered. It is always preferred to use “Retry” to collect a

full set of data.

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Control unit Status Messages

Further operational alarm/error messages are shown on the LCD when any display parameter is

selected. When either Readings or Diagnostic parameters (D200 - D265) are shown, the SMART

Communicator is interrogating the MSM400 control unit every 0.5 seconds, and the information returned

includes various message signals concerning the current status of the returned echo. These messages are

displayed on the LCD line 2 for two seconds when the condition is first detected, instead of the Display

parameter value. After this display period the condition message is abbreviated to a two letter code

shown on the right hand side of the LCD, as long as the condition persists These status messages are

updated every 10 seconds. Only one status message is displayed at a time, in a priority order, as listed

below, to see all the alarms present use P520 - P525.

CURRENT SATURATED (CS)

The echo currently monitored is from a process value outside the pre-programmed 4-20mA range, so

the current is either at 4mA or 20mA and is possibly not valid.

TEMPERATURE LIMIT (TL)

This indicates that the process temperature or a combination of the process and ambient temperatures

have resulted in the electronics becoming too hot or too cold. Using the HHC, check P523 to see the

maximum and minimum temperatures recorded. If the MSM400 electronics has recorded a temperature

above 55°C then the electronics may have been permanently damaged. The MSM400 should be

returned to Mobrey Measurement or your local agent for repair or replacement.

There are also various microprocessor fault messages which should be shown on the LCD, indicating

significant problems with the sensor microprocessor. For all these error conditions reference should be

made to the factory, and it will probably be necessary to return the unit for repair. The messages and

codes are:

ROM CHECKSUM

EEPROM SIGNATURE

EEPROM CHECKSUM

RAM TEST

When an Unknown instrument is being interrogated, a universal set of error messages is used:

DEVICE MALFUNCTION

PV OUT OF LIMITS

NON PV OUT OF LIMITS

CURRENT SATURATED

D.10.2Invalid Data Entry

When the Operator tries to enter a command or parameter value which is invalid, the message on the

screen will indicate this. Typical messages occur as follows:

“INVALID INPUT”

“INVALID DATA”

(Rejected by the Psion Organiser)

(Rejected by the MSM400 control unit)

- Parameter value entered is outside the limits allowed for that parameter, or resetting of this

parameter is not allowed as per the data entered.

“IN WRITE PROTECT MODE”

- The Password is “Closed” or does not allow access to this parameter.

“INVALID PARAMETER NUMBER”

- Parameter number entered is not known by MSM400.

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“PASSWORD NOT OPEN”

- If the Password in the MSM400 control unit memory is set “CLOSED”, then it will not be

possible to load data from the SAFE or OFFLINE register. The Password protects the data in the

MSM400.

“INVALID ACTION NOT THE SAME INSTRUMENT”

- If an attempt is made to transfer SAFE register data to the WORKING register of an MSM400

control unit which is not the origin of the SAFE register data, this will not be allowed. The

message indicates that D731 on the currently connected loop is not the same as the D731 in the

SAFE register.

“INSTRUMENT IN MULTIDROP MODE”

- The current output control circuitry in the MSM400 control unit is only active when the MSM400

is operating as a 0-20 or 4-20mA device. In a multidrop configuration the current is set to 4mA,

and trimming and current set commands are inoperative.

D.10.3Communication Errors

Communications between the MSM400 control unit and the SMART interface/Psion organiser are subject

to error checking and acknowledgement signals according to the HART protocol. This means that only

valid messages are accepted, and if the message is invalid then it will be rejected.

The screen of the LCD will indicate if a message has not been received correctly. This is perhaps most

likely to be seen when the Display parameters are being used, since these are updated with a new value

in a message every 0.5 seconds. If the message is received incorrectly, the second and third lines of the

display will show one of the following messages:

VERTICAL PARITY ERROR IN REPLY

OVERRUN ERROR IN REPLY

FRAMING ERROR IN REPLY

LONGITUDINAL PARITY ERROR IN REPLY

BUFFER OVERFLOW IN REPLY

Which describe the cause of the fault.

There is an identical group of errors in the outgoing message:

VERT PARITY ERROR IN OUTGOING MESSAGE

OVERRUN ERROR IN OUTGOING MESSAGE

FRAMING ERROR IN OUTGOING MESSAGE

LONGDNL PARITY ERROR IN OUTGOING MESSAGE

BUFFER OVERFLOW IN OUTGOING MESSAGE

If this occurs frequently, it is appropriate to check the electrical connections to the instrument loop, the

presence of the SMART load resistor and that the SMART Communicator is attached at the correct

position in the loop.

The “IN OUTGOING MESSAGE” group of error messages if displayed while accessing the Programme

Parameters implies that the message from the SMART Communicator was not received correctly by the

MSM400. Therefore the instructions in the message would have been rejected, and the Parameters

remain unchanged at their previous value. This previous value will be shown on the LCD screen on the

SMART Communicator after the error message, to prompt the operator to repeat the last parameter

value amendment. During a Register transfer this message will automatically cause the Communicator

to hold transmission, and suggest a retry because of the error.

The “IN REPLY” group of error messages if displayed when programming the instrument, signals a more

significant communications failure. This indicates that the acknowledgement of the change instruction

sent to the MSM400 was incorrect. It is not known whether the Parameter value in the MSM400 was

changed or not. The SMART Communicator assumes that it was not changed, and reverts to the original

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OFF-LINE MEMORY TRANSFERS

D0 - D8 :

MSM400

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(pre change) value : this prompts the operator to re-enter the required new value. It is important that

the Parameter is re-entered, to ensure that the Working register memory in both the Psion and the

MSM400 contain the same data.

If either of the above two Outgoing or Reply Comms Error messages occurs in a Backup menu transfer

between registers, it is advisable to repeat the Backup operation to complete the data transfer, or check

that the memory has been transferred correctly.

The message “NO RESPONSE FROM TRANSMITTER” Indicates a failure of the power on the loop or a

failure of the connection of the SMART interface across the loop or the address of the instrument has

been changed. Connection should be re-established if possible.

The message “LOCKED OUT BY BUS ACTIVITY” indicates there are either two secondary masters on the

bus or a primary master is continuously trying to access an instrument that does not exist.

The message “INCOMPLETE REPLY” indicates that a start of a message was detected but the message

was not completed in the time allowed. This is most likely to be due to a power failure or a loss of

connection.

D.11.0Current Loop Checks and Trimming

Introduction

The MSM400 4-20mA control unit has no customer or service engineering adjustable potentiometers

on the printed circuit boards. All current trimming of the 4mA and 20mA set points is achieved via the

SMART communicator. Because this is a “live” interaction, the access to this function is via the

MONITOR functions and screen on the Communicator.

Select “Current – Output” and the screen displayed is

** CURRENT OUTPUT **

Set current

Trim-maximum

These three functions are as follows:

D.11.1Set current

This selection is used for MSM400 transmitters attached to a single 4-20mA loop to check for correct

functioning of all the equipment – the MSM400, the communications and the other loop indicators and

outputs.

By selecting the “Set-current” option the screen prompts the operator to choose a current value for the

loop, for example 12mA.

ENTER NEW VALUE

12-

On pressing “EXE”, the current in the loop is set to this value, and the loop indicators and trips can be

checked for function and calibration. The LCD screen changes to suggest selection of a new value if

necessary. To abort the procedure press ON/CLEAR

CURRENT OUTPUT =

12 mA

ENTER NEW VALUE

Some specific error messages are used to prevent the loop current being set outside the valid 4-20mA

limits.

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D11.2

Trim Current

If the procedure shown above suggests that there is a calibration difference between the MSM400

output and other current monitoring equipment on the loop, it will be necessary to use a calibrated

meter to establish which unit is in error. Using the “Set current” routine of the MSM400 can be

instructed to provide outputs between 4 and 20mA that the MSM400 considers correct. If these are in

error, the “Trim current” routine is used as follows:

The “Trim current” selection sets the current output of the MSM400 either at maximum (supposed to be

20mA) or minimum (supposed to be 4mA) depending on the option selected.

For maximum the display shows:

CURRENT OUTPUT IS

NOW 20mA. MEASURE

CURRENT AND USE ↑ & ↓

TO TRIM THE OUTPUT

Follow the instructions and if the current output is in error, i.e. not 20mA, use the ↑ and ↓ arrows as

trimming signals to adjust the value to be exactly 20mA. Each press of the arrow causes an audible

signal and adjusts the output value by a discrete step. (approx 6μA)

This process should then be repeated for the 4mA setting. Once the current output is seen to be correct

the ON/CLEAR key is used to escape.

Mode Cancelled Warning

If while trimming or fixing the current the analog output returns to its normal mode the message FIXED

CURRENT MODE CANCELLED will be displayed. This could occur for three reasons, master has sent the

appropriate command, the MSM400 has been powered off then on again, or the output in fixed current

mode has been at the same value for 20 minutes.

D.12.0Unknown Instrument

This limited support for unknown control unit is provided so that the identification and basic performance

of any control unit can be obtained without having to change to another HHC. This is of particular use in

multi-drop networks where all the currently occupied addresses need to be identified when selecting an

address for an additional control unit on the loop.

If the control unit detected is not an MSM400, MSP100 or MLT100 then Unknown instrument is

displayed and an access to the parameters is prompted for. If this is selected then the parameters that

are present on all transmitters are uploaded, after first setting up any files that are required.

If the instrument conforms to revision 5 or higher of the HART protocol then the manufacturer of the

instrument will be available. If it is of an earlier revision then only the model number will be available.

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D13.0

D13.1

SMART Interfaces – Compatibility

Introduction

The MOBREY MSM400 SMART slurry monitoring system unit uses the HART digital communications

protocol.

This was originally developed by Rosemount Inc. in USA, and uses Bell 202 Frequency Shift Key

signalling on top of a 2 wire DC loop supply. The MOBREY MSM400 system conforms to Revision 5.1

of the HART protocol.

Various other manufacturers use this same HART protocol and produce sensor equipment that can be

attached to 4-20mA or digital loops. Similarly there are other hand held communicators that use the

HART protocol to interrogate transmitters in such loops. Not all manufacturers’ equipment conforms to

the Revision 5.3 of the protocol.

At present the major SMART communicators working to a HART protocol are

MOBREY –CK1 and –CK2

HART Communicator Model 275 manufactured by Rosemount

Rosemount Model 268

Measurement Technology MTL 611 and CNF 41

MOBREY H-View

This is a rapidly developing field, and the specification of these units is continually being updated. Each

updating produces better interoperability and user friendly operation. However, even equipment

conforming to the same Revision of the protocol from different manufacturers cannot be regarded as

compatible, because each sensor has a unique programme structure.

D.13.2Transmitters recognised by the MOBREY SMART Communicators

The MOBREY-CK1 and –CK2 SMART Communicators can identify and interrogate all variants of the

MLT100 and MSP100 ultrasonic level transmitters and MSM400 slurry monitors.

If a MOBREY SMART Communicator is connected to a loop with another type of control unit, for e

example the Rosemount 1151 pressure control unit, it will record the presence of an “Unknown

instrument”. Various parameters can be read and a limited set of common parameters can be changed.

D.13.3Use of multiple SMART Communicators

The HART SMART protocol allows two SMART digital communicators to be active on the same loop

at once. Only one of these can be a hand held communicator (known as “Secondary Master”) such as

the MOBREY-CK1 or the Rosemount 275 : the second must be a permanent monitoring system such as

MOBREY H-View (which is designated as a ”Primary Master”).

If two hand held communicators are connected to the same loop at the same time and both try to

communicate at once there will be a conflict in the messages and neither unit will function correctly.

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