Installation, Operation & Maintenance Manual
IP262/Z0, Rev. AB
February 2012
MSL600
MSL600
Ultrasonic continuous sludge blanket monitor
Model Covered:
MSL600/Z0 with MSL603 transducer
Page 1
Installation, Operation & Maintenance Manual
IP262/Z0, Rev. AB
February 2012
MSL600
5.6
5.7
5.8
5.9
Relay parameters .............................................................................................................................................. 23
Alarm.................................................................................................................................................................. 23
Transducer out-of-water time........................................................................................................................... 23
Digital input ....................................................................................................................................................... 24
6.
Detailed operation.................................................................................................25
6.1
6.2
6.3
6.4
The menu structure........................................................................................................................................... 25
Parameter editing.............................................................................................................................................. 26
Scrolling............................................................................................................................................................. 26
Direct access..................................................................................................................................................... 26
7.
Application parameters ........................................................................................27
7.1
Main menu parameters..................................................................................................................................... 27
7.1.1
7.1.2
7.2
Cancel password................................................................................................................................................. 27
Go Online/Offline................................................................................................................................................. 27
Installation parameters..................................................................................................................................... 27
7.2.1
7.2.2
7.2.3
7.2.4
7.3
Tank Depth – P101 ............................................................................................................................................. 27
Xdr Tilt Time – P103 ........................................................................................................................................... 27
Tag No. – P242................................................................................................................................................... 27
Description – P240.............................................................................................................................................. 28
De-sludge parameters ...................................................................................................................................... 28
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.4
Start On - P250 ................................................................................................................................................... 28
Stop On - P251 ................................................................................................................................................... 28
Stop If - P252...................................................................................................................................................... 29
Start Time - P253................................................................................................................................................ 29
Interval - P254..................................................................................................................................................... 29
Max Retries - P257 ............................................................................................................................................. 29
Cleaning parameters......................................................................................................................................... 30
7.4.1
7.4.2
7.4.3
7.5
Start On - P260 ................................................................................................................................................... 30
Interval - P264..................................................................................................................................................... 30
Cleaning Time - P444 ......................................................................................................................................... 30
mA output parameters...................................................................................................................................... 30
7.5.1
7.5.2
7.5.3
7.5.4
7.6
Lower Range Val - P400..................................................................................................................................... 30
Upper Range Val - P401..................................................................................................................................... 30
Alarm Action - P402 ............................................................................................................................................ 31
0/4-20mA - P403................................................................................................................................................. 31
Relay parameters .............................................................................................................................................. 32
7.6.1
7.6.2
7.6.3
7.7
Relay RL1 mode (P410) and RL2 mode (P420).................................................................................................. 32
Relay On and Off Points ..................................................................................................................................... 34
Relay overrides (Min ON, Max ON, and Min OFF).............................................................................................. 34
Display parameters (HMI)................................................................................................................................. 34
7.7.1
7.7.2
7.7.3
7.7.4
7.8
HMI upper, middle, and lower display options..................................................................................................... 34
Backlight On/Off - P575 ...................................................................................................................................... 35
Clear Trend......................................................................................................................................................... 35
Clear Profile ........................................................................................................................................................ 35
Logging parameters.......................................................................................................................................... 36
7.8.1
7.8.2
7.8.3
Log Interval - P590.............................................................................................................................................. 36
Fast log - P591.................................................................................................................................................... 36
Data Overwrite - P592......................................................................................................................................... 36
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IP262/Z0, Rev. AB
February 2012
MSL600
7.8.4
Low Mem Alarm - P593....................................................................................................................................... 36
7.9
Engineering parameters................................................................................................................................... 37
7.9.1
7.9.2
7.9.3
7.9.4
7.10
Alg. Select – P620............................................................................................................................................... 37
Common algorithm parameters P621 to P629 .................................................................................................... 37
Municipal 1 parameters P630 to P637 ................................................................................................................ 40
Municipal 2 parameter P640 ............................................................................................................................... 42
System parameters........................................................................................................................................... 43
7.10.1 AUTO CYCLE function........................................................................................................................................ 43
7.10.2 DISPLAY test ...................................................................................................................................................... 43
7.10.3 Current Output test parameters P700 to P702.................................................................................................... 43
7.10.4 LOAD DEFAULTS function................................................................................................................................. 43
7.10.5 COMMS parameters P710 to P716..................................................................................................................... 44
7.10.6 SETTINGS parameters P730 to P737 and BASE UNITS selection ....................................................................44
7.10.7 PIN parameter P740 ........................................................................................................................................... 45
7.10.8 FIXED parameters D750 to D753 ....................................................................................................................... 45
7.11
Readings and diagnostics parameters ........................................................................................................... 46
7.11.1 Readings parameters D800 to D834................................................................................................................... 46
7.11.2 Diagnostics parameters D835 to D852 ............................................................................................................... 47
8.
Technical reference...............................................................................................49
8.1
Transmit pulse and echo processing.............................................................................................................. 49
9.
Maintenance ..........................................................................................................49
Troubleshooting....................................................................................................49
Programming chart ...............................................................................................50
Specification..........................................................................................................53
10.
11.
12.
12.1
MSL600 .............................................................................................................................................................. 53
12.2
MSL603 transducer........................................................................................................................................... 54
13.
14.
Dimensional drawings ..........................................................................................55
MSL603 transducer cable extension ...................................................................57
Figures and tables
Figure (1): MSL600 system architecture ..........................................................................................................................9
Figure (2): Circular clarifiers – Rotating bridge.................................................................................................................10
Figure (3): Circular clarifiers - Static bridge......................................................................................................................11
Figure (4): Rectangular clarifiers......................................................................................................................................11
Figure (5): MSL600 mounting...........................................................................................................................................14
Figure (6): Transducer cable wiring..................................................................................................................................15
Figure (7): External connection terminals.........................................................................................................................16
Figure (8): The LCD display layout...................................................................................................................................18
Figure (9): Keypad layout.................................................................................................................................................19
Figure (10): Tank depth parameter .................................................................................................................................21
Figure (11): Menu structure..............................................................................................................................................26
Figure (12): MSL600 Bridge mounted unit .......................................................................................................................53
Figure (13): MSL600 and MSL603 assembly...................................................................................................................54
Table (A): Connection descriptions reading from left to right (all via M20 cable glands)..................................................16
Table (B): Relay Parameter numbers...............................................................................................................................32
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Installation, Operation & Maintenance Manual
IP262/Z0, Rev. AB
February 2012
MSL600
(i)
Safety precautions
BEFORE OPERATING THIS DEVICE THE MANUAL SHOULD BE READ FULLY
The following safety precautions should be observed before using this product or working on the attached cables.
ꢀ
This MSL600 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
should not be allowed 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. Otherwise, only service
personnel should perform them.
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. There are no user
serviceable parts on the main PCB section of the MSL600 product.
ꢀ
ꢀ
Users of this product must be protected from electric shock at all times. The responsible body must ensure
that users are prevented access and/or insulated from every connection point. Product users must be trained
to protect themselves from the risk of electric shock.
Before operating an instrument, make sure the line cord is connected to a properly grounded power
receptacle. Inspect the connecting cables for possible wear, cracks, or breaks before each use. When fuses
are used in a product, replace with same type and rating for continued protection against fire hazard.
ꢀ
ꢀ
Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth
ground connections.
Standard fuses, with applicable national safety approvals, may be used if the rating and type are the same. If
you are unsure about the applicability of a replacement component, call a MOBREY office for information.
Only use the MSL600 with the sensor supplied or Mobrey agreed replacement. The unit will not necessarily
work with apparently equivalent sensor units.
ꢀ
ꢀ
To clean the instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument
only. Do not apply cleaner directly to the inside of the instrument or allow liquids to enter or spill on the
instrument.
WARNING - If this equipment is used in a manner not specified by Mobrey, the protection provided may be
impaired. The MSL600 is regarded as permanently installed equipment and as such a switch or circuit
breaker must be included in the installation. This should be in close proximity to the equipment, it should be
marked as the disconnecting device, and it should disconnect both current carrying conductors.
ꢀ
ꢀ
A protective earth should be used for all applications.
The normal application of the MSL600 requires it to be mounted on a water handling plant. The installation
point and power cables associated with the MSL600 must be such that tank overflow, local flooding or pump
failure do not cause these to be submerged or subject to flows of water. Sensor and sensor cabling can be
submerged without hazard to equipment operators when correctly connected as described in this manual.
Explanation of symbols: The IEC Protective Earth Symbol is:
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 the 2 voltage selection switches compared with the available power supply.
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Installation, Operation & Maintenance Manual
IP262/Z0, Rev. AB
February 2012
MSL600
1. Introduction
Before operating this device the manual should be read carefully paying particular attention to the safety
precautions laid out in section (i).
This instruction manual provides comprehensive information specific to the Mobrey Measurement continuous
suspended solids blanket level monitor, the MSL600.
1.1 About the MSL600
The basic MSL600 system contains an ultrasonic transducer and a bridge-mounted control unit.
The control unit is microprocessor-based and is given the designation MSL600. It is intended to be mounted on a
bridge using a specially designed and easy-to-install mounting bracket that is supplied with the system.
The system is specially adapted for use with clarifiers and thickeners containing municipal and industrial
wastewater treatment sludge. The MSL600 provides a means of sensing the presence of the sludge blanket and
measuring its depth in the clarifier. It also provides a range of current and relay outputs to the user for control and
alarm purposes.
The MSL600 uses the sonar principle, with an ultrasonic pulse transmitted under water from a partially
submerged, IP68-rated transducer (MSL603). The pulse of ultrasound is transmitted vertically down into the
clarifier tank, and then reflects from the surface of the sludge blanket. The system captures the ultrasonic echoes
received from the sludge blanket interface and determines the time-of-flight of the echo from the transducer to the
sludge blanket.
Knowing the speed of sound in the supernatant (the system has automatic temperature compensation), the
control unit calculates the distance to the blanket interface. This distance is then subtracted from the
programmed depth of the tank to give the sludge blanket depth or interface level. This is the system’s
fundamental process variable.
1.2 About this Manual
This section introduces the user to the MSL600 system, its components and key features. The system’s mode of
operation is explained in this section.
In section 2, the manual discusses application planning where installation is primarily intended to be on municipal
and industrial wastewater clarifiers.
In section 3, the manual discusses the actual physical process of mechanical and electrical installation of the
system. This section provides a step by step procedure for easy installation of the MSL600 system on site.
In section 4, the manual introduces the basics of programming the system. This section introduces the human
machine interface (HMI), keypad and display
In section 5, the manual discusses the minimum programming steps needed for commissioning the system so
that a meaningful measurement can be made. This quick start setup section is intended to cater for the needs of
most users.
In section 6, the manual discusses in more detail the human machine interface and how the system is
programmed.
In section 7, all of the system’s parameters are discussed and their function detailed. Sections 6.0 and 7.0 are
primarily intended for the more advanced user who needs to tune the system to meet an unusual application.
In section 8, the manual discusses in detail the mode of operation of some of the key system elements. This
section is intended for the most advanced user.
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IP262/Z0, Rev. AB
February 2012
MSL600
Finally, sections 9 to 13 cover maintenance, troubleshooting, programming chart, technical specifications and
dimension drawings relevant to using the MSL600 system.
1.3 Important MSL600 features
The MSL600 system incorporates several unique design features which are intended to promote trouble free
operation, give a degree of installation flexibility, and allow ease of installation.
1.3.1 Human Machine Interface
In common with other Mobrey Measurement control units, the MSL600 makes use of the Mobrey Measurement
Human Machine Interface (HMI). The HMI reflects comments and suggestions received about the need to be
easy and intuitive to use. The intention is that you should be able to program and interrogate the system using the
integral membrane keypad and Liquid Crystal Display (LCD) without the need for regular reference to this manual.
For the more experienced user, the HMI also facilitates rapid navigation of the menu structure to system parameters.
1.3.2 Self-cleaning
One of the most important features of the MSL600 is its transducer self-cleaning facility.
In the application for which the system is designed, the transducer is normally mounted in a relatively hostile
environment. In this environment, the likelihood of the transducer becoming coated or otherwise fouled is
relatively high. A fouled transducer is far less efficient at transmitting sonar pulses into the supernatant. Without
the ability to automatically clean itself, the transducer maintenance cycle would need to be more regular, and thus
increase the life cost of the system.
Experience suggests that any moving mechanical cleaning devices are themselves prone to fouling. It is for this
reason that the MSL600 uses an air purge cleaning function. Extensive experimental results show that this
method is extremely effective in keeping the face of the transducer free from any coating growth or build-up of
floating debris.
The cleaning cycle is optimised for maximum efficiency. However, you can manually initiate a cleaning cycle or
override this feature by turning it off.
1.3.3 Mounting bracket
Most clarifier tanks have railings on the walkway, rotating or moving bridge or walkway. It is recommended that
the MSL600 be mounted on these railings. The MSL600 system is supplied with a purpose designed mounting
bracket. This bracket design has been optimised to fit most designs of railing. This is intended to provide
alignment and a stable platform for the transducer and control unit.
The transducer and mounting bracket, collectively known as an MSL603, are intended to be fitted to the clarifier
before the MSL600 control unit is attached to them. This allows mechanical adjustment and fitting without the
need to worry about the electronics in the enclosure.
The transducer mounting arrangement is hinged so that the transducer can be lifted out of the water, using the
chain provided, for ease of maintenance (in most cases this will not be necessary because the transducer is self-
cleaning). When installed, the transducer front face should be continually immersed in water to a depth of
approximately 75mm (3 inches). The MSL600 mounting bracket should allow sufficient adjustment for this in
most cases. Extensions and extra tubes are readily available from a number of sources to allow the mounting to
be modified – contact Mobrey Measurement Sales for assistance (see section 3.3.3 for other sources).
Note:
The MSL603 transducer can also be supplied without mounting hardware and is supplied complete with
10 metres (33 feet) of connecting cable and air hose for the self-cleaning system. This allows the installer to
provide their own mounting arrangements using suitable 25mm (1 inch) pipe or conduit. This arrangement is
normally supplied for fixed bridges or enclosed tanks where a pivoting sensor is not required.
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February 2012
MSL600
1.4 As a system
Figure (1) shows the architecture of the complete MSL600 system and where each component is intended to be
used. Install the MSL603 transducer and mounting bracket on the rotating bridge or fixed walkway over the
clarifier tank. Install the MSL600 control unit on the mounting bracket.
Figure (1): MSL600 system architecture
Location
Fixed or rotating bridge
Location
Control room
PLC/SCADA
3 relay
outputs
RS232
4-20mA
output
MSL600 - Standalone Bridge Mount Unit
PC or
Laptop
computer
MSL603 Transducer
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IP262/Z0, Rev. AB
February 2012
MSL600
2. Application planning
The following section discusses a few practical considerations when planning an installation.
2.1 Circular clarifiers
Circular clarifiers are very common and can come with rotating or static bridges over them.
2.1.1 Rotating bridge
If the transducer is mounted on a rotating bridge then it should be positioned on the leading edge of the bridge,
see Figure (2). This places it ahead of any bow wave in the sludge blanket which may be created by trailing sub
surface scrappers that would otherwise give rise to a false indication of the blanket level.
Ideally the transducer should be mounted between 1/3 and 2/3 of the way along from the outer (wall) edge of the
settlement tank (i.e. 1/3 to 2/3 of the radius from the inside of the tank wall).
Care should be taken to ensure that the transducer is mounted over an undisturbed section of the tank, i.e. not
too close to the tank inlet or tank wall, and away from columns of rising gas bubbles. All of these factors can
result in false sonar echoes being received. It is recommended that the transducer be mounted at least
1m (3.3 feet) from any such structures.
If a scum removing skimmer is present then the transducer should be mounted behind this.
When locating the transducer the user must ensure that there are no permanent underwater obstructions below
the transducer, as these will give false sonar echoes and disrupt the signal. It is recommended that the
transducer be mounted at least 1m (3.3 feet) from any such structures.
Ensure that the transducer does not come into contact or collide with any scum boards, weirs or other surface
obstructions as the bridge rotates.
Figure (2): Circular clarifiers – Rotating bridge
Approximate
MSL600
mounting
position
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February 2012
MSL600
2.1.2 Static bridge
The transducer mounting arrangement is designed to lift out of the water if it is mounted on a fixed bridge when a
moving scraper passes underneath (e.g. on a picket fence thickener). Ideally, the transducer should be mounted
1/3 to 2/3 of the way along from the outer (wall) edge of the settlement tank (i.e. 1/3 to 2/3 of the radius from the
inside of the tank wall).
If the transducer is mounted on a static bridge then it should be positioned on the trailing edge of the bridge, see
Figure (3). This gives the hinge mechanism maximum clearance from the bridge structure.
Ensure the transducer guard is facing towards the moving sweeper. The guard and hinge mechanism can be
angled slightly to meet the rotating parts at a normal incidence. This avoids the transducer guard sliding
sideways along the rotating part as it is lifted.
Always check that the parts sliding over each other will not become entangled or locked together. The rotating
mechanism on most bridges is strong enough to bend the mounting bracket if this should happen.
It is strongly recommended that a few uneventful rotations be observed before installation is completed.
Figure (3): Circular clarifiers - Static bridge
2.2 Rectangular clarifiers
As with a rotating bridge and a circular tank, the transducer should be mounted from the leading edge of the
bridge to avoid false level readings from the disturbed bow wave in the sludge blanket as the bridge scrapes
sludge into the hopper at the end of the clarifier.
The considerations detailed in section 2.1 for rotating clarifiers should all be considered as appropriate for a
rectangular clarifier.
Figure (4): Rectangular clarifiers
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IP262/Z0, Rev. AB
February 2012
MSL600
3. Installation
The following section discusses installation considerations in more detail.
3.1 Preliminary checks
Carefully unpack the MSL600 control unit, transducer, and mounting bracket arrangement from their packaging.
Check that there is no visible damage to any of the packed parts, paying particular attention to the transducer and
transducer cables, and the membrane keypad and display area on the MSL600.
Contained in the packaging should be the following:
Pack one
•
1 x MSL600 bridge mounted unit, with compressor housing containing the air compressor for self-cleaning on
a metal mounting plate (pre-assembled).
•
1 x MSL600 manual.
Pack two
1 x transducer assembly, and bridge mounting kit (including tool kit).
•
(Optional – MSL603 transducer only with 10 metres of cable and air hose)
3.2 Location
Determine the optimum location for installation of the MSL600 following the hints and tips given in section 2,
Application planning.
3.3 Mounting bracket attachment
The mounting bracket is specifically designed for mounting on the centre rail of the safety railing on the bridge of
any settling tank, see Figure (5). The rail can be any diameter up to 52mm (2 inches).
The bracket is also clamped to the bridge kicking board or similar supporting frame.
Adjustments can be made for different bridge heights, and the bracket can be angled to miss obstructions.
An extension arm can be added to the main support tube to extend the adjustment of the bracket further, if required.
Most adjustments are made by hexagon key and spanner, included in the supplied bridge mounting kit.
The transducer arm hangs vertically from a pivot and can be swung out of the water for cleaning and inspection.
WARNING!
The transducer is a sensitive instrument and care must be taken to prevent unnecessary impact or strain on it during installation.
3.3.1 Bridge preparation
The bracket should be prepared and initial adjustments made off the bridge. If any obstructions are present in the
installation area, the unit should be set up accordingly. This will greatly simplify any adjustments required during
mounting of the unit on the bridge. The cable and hose from the transducer should be handled with care to
prevent any sharp bending, especially in the area where they exit the transducer arm.
Check there is sufficient room between the top rail, centre rail, and any other structure for the control box to be
fitted. The space required is 430mm (17 inches) high and 360mm (14 inches) wide [see Figure (5)].
Measure the distance from the water surface to the centre rail of the safety railing (dimension A).
Measure the distance from the centre rail to the kicking board (dimension B) or similar structure.
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February 2012
MSL600
With the bracket on the ground adjust the pivot tube up or down the main support tube until the distance between
the angle bracket and midpoint of the transducer is dimension A. Adjust the clamping bracket up or down the
main support tube to dimension B so it will be just clear of the final clamping position.
If the clamp is higher than the pivot tube this will need to be removed and reassembled in reverse order (view X).
If dimension A is too large and cannot be achieved, remove the pivot tube assembly, screw on the extension tube
and refit the pivot tube (view Y). If the pivot arm is to be set at an angle or set to the opposite hand, this should
be done at this stage.
Adjust the transducer guard so that it is at 90° to the pivot arm, projecting under the pivot arm and approximately
25mm (1 inch) below the bottom of the transducer.
If necessary move the chain attachment clamps to positions convenient for swinging the transducer out of the
water. Adjust the chain so that it is slightly slack with the unit fully extended and any excess chain is hanging on
the main support tube and not the transducer arm.
The cable and air hose can now be attached to the bottom of the main support tube with the cable ties provided.
The cable and hose must make a 360° loop between transducer tube and main support tube to allow for flexing
when the arm is lifted. Move the transducer arm up and down and check that the cable and hose move freely
without excessive strain.
Before installing the unit on the bridge check that all the fittings associated with pivot tube are securely tightened,
including those which have not been adjusted, as these are often difficult to reach later.
3.3.2 Installing the bracket on the bridge
Before carrying the unit on to the bridge, swing the transducer arm into the up position and attach it to the main
support tube with the chain. This makes the unit more compact and easier to manage. Lift the unit over the
handrail and hook it on to the horizontal centre tube of the rail. Release the rail clamp and push it up firmly under
the rail. While pushing on the barrel of the rail clamp (not the lug) retighten the clamping screw. This will
ensure a tight fit against the rail.
Loosen the clamping bracket assembly, attach it to the kicking board or similar structure and retighten. The
studding allows the main support tube to be adjusted approximately to the vertical position. In some instances
one or both nuts between the clamps will need to be removed. Tighten all fixings.
Lower the transducer arm carefully into the water and check the water surface is approximately in line with the top
of the parallel portion of the transducer and it is clear of obstructions. Adjust the pivot arm height and angle as
necessary. It is recommended the unit be removed from the bridge to make these fine adjustments. Ensure the
cable and air hose still move freely without excessive strain when the transducer is raised and lowered.
Check that the transducer arm is hanging vertically. The transducer guard also functions as a balance arm.
To adjust, swing the arm up and loosen the transducer guard. Move the guard backwards or forwards as
appropriate and retighten. Repeat until the arm hangs vertically.
When the unit is installed and functioning correctly check all fittings are securely tightened, including those which
have not been adjusted.
3.3.3 Attaching the MSL600
The MSL600 and compressor box come attached to a back plate complete with mounting lug. Check the
clamping screw of the mounting lug is clear of the inside face and slide the complete unit onto the top of the main
support tube. Orientate the unit to the correct position and tighten the clamping screw.
Run the cable and hose up to the control unit avoiding sharp bends and flattening of the hose. Plug the air hose
onto the air connector on the bottom of the compressor box. The unit is now ready for wiring.
Additional fittings for MSL bracket (UK only) can be obtained from:
Alvin Products Limited, Knight Works, 10-12 Hampton Street, London, SE1 6SN
Fittings are ALVIN ‘KEY’ CLAMPS (Size 5 - 26.9mm dia.) Similar fittings are also available from other manufacturers.
Note: Socket head screws require 1/4” A/F Hex key clamp bracket screws require 17mm A/F spanner.
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February 2012
MSL600
Figure (5): MSL600 mounting
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MSL600
3.4 Transducer connections
The MSL600 is housed in an ABS enclosure rated to IP66. The lower section of the housing is for cable
connections and the upper part has the LCD and keypad controls.
It is not necessary, or advisable, to remove the lid of the upper part of the enclosure. There are no user
serviceable parts inside.
All field wiring connections are accessible by removing the lower lid, which is secured by four screws. Inside the
terminal area, all connections are made using screw terminals. All terminal blocks are suitable for wires 0.5mm2 to
2.5mm2 (26 to 12 AWG). Insulation should be stripped back 7.0mm (0.25 inches).
The transducer cable comprises of five wires, see Figure (6), the connections for which are as follows:
• White wire
• Black wire
• Yellow wire
• Red wire
-
-
-
-
-
Transducer signal wire. This should be connected to the terminal
block marked ‘SENSOR’ and ‘SIG’.
Transducer 0V wire. This should be connected to the terminal block
marked ‘SENSOR’ and ‘0V’.
Transducer screen wire. This should be connected to the terminal
block marked ‘SENSOR’ and ‘SCN’.
Temperature compensation positive wire. This should be connected
to the terminal block marked ‘TEMP’ and ‘IN’
• Brown wire
Temperature compensation 0V wire. This should be connected to
the terminal block marked ‘TEMP’ and ‘0V’.
Figure (6): Transducer cable wiring
All connections to the transducer are intended to be made via the first M20 cable gland (fitted) on the left-hand
side, at the bottom of the MSL600 enclosure.
3.5 Power and other electrical connections
(See also section (i), safety precautions)
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.
Prior to applying power to the unit ensure that the two voltage selection switches are set to the appropriate
voltage for the installation.
In the event of a fuse needing replacement the user must ensure that the mains input fuse (F1) has a rating of
200mA (F) and the cleaning compressor (F2) has a rating of 1A(T).
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February 2012
MSL600
The diagram below, Figure (7) shows the layout of external connection terminals of the MSL600 with the lower
terminal housing cover removed. Table (A) gives a description of each.
Note:
When wiring of the unit is finished, ensure that the terminal housing cover is replaced the correct way up, i.e. with
the bevelled edge uppermost otherwise the IP rating of the enclosure may be compromised.
Figure (7): External connection terminals
SENSOR TEMP
(see note 1)
SIG
0V
SCN
IN
Transducer sonar signal (white)
Transducer zero volts (black)
Transducer screen (yellow)
Temperature compensation signal (red)
Temperature zero volts (brown)
0V
DIGITAL INPUT (see note 2)
1
Digital input signal
0V
Digital input zero volts
CURRENT OUT ISOLATED
0V
Current output zero
Io
Current out
24V
24V source for current output (Not normally used)
RELAY 1 (de-energised state)
NO
C
Normally open
Common
NC
Normally closed
RELAY 2 (de-energised state)
NO
C
Normally open
Common
NC
Normally closed
RELAY 3 (de-energised state)
NO
C
Normally open
Common
NC
Normally closed
COMPRESSOR (Factory wired)
115V
C
230V
(White)
(Purple)
(Orange)
115V supply for the cleaning compressor
Common for the cleaning compressor
230V supply for the cleaning compressor
MAINS
L
N
E
Live terminal for mains supply
Neutral terminal for mains supply
Earth terminal for mains supply
Table (A): Connection descriptions reading from left to right (all via M20 cable glands)
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3.6 Cable extension
The transducer is connected using ALPHA XTRA-GUARD4 P/N45272. The standard cable length is 10 metres.
This cable comprises of two twisted pairs with an overall screen and drain. The brown and red wires from the
transducer should be connected to one twisted pair. The black and white wire from the transducer should be
connected to the other twisted pair. The yellow from the transducer should be connected to the drain wire which
must be terminated at the screen (SCN) terminal on the PCB.
Fitting instructions for extending the MSL603 transducer cable are in section 14.
Note 1:
The standard 10 metres of cable should be sufficient for most installations. The maximum recommended
additional extension is 20m. Use only cable conforming to the specification given above and ensure any
connections are made using high grade screened connectors. For suitable specification connectors refer to
Mobrey Measurement customer support. It is the responsibility of the installer to ensure that any extension to the
cable must be suitable for its working environment.
Note 2:
The digital input, if used must be connected to switch relay contacts which are insulated to IEC6010 category III
(4kV impulse) with no exposed live parts.
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4. Programming
The following sections introduce the main display and use of the keypad (MSL600 only) for programming the
MSL600. Password protection to prevent unauthorized access is also discussed.
4.1 Display
The display is a 240 x 128 dot matrix LCD module with full graphics capability and LED back light. The LCD is
split into four parts, see Figure (8).
Figure (8): The LCD display layout
•
•
Upper left
–
–
In the upper left of the display is an icon representing the transducer and the unit tag
number. The tag number is user programmable via the HMI.
Upper right
The HMI information is displayed in the upper right of the display. The HMI uses 4 lines
x 20 characters with each character 7 x 5 dots. In normal operation, the actual blanket
level is displayed here.
•
•
Lower left
–
–
The lower left of the display shows the sonar echo profile from which the blanket position
is determined.
Lower right
The lower right of the display shows the blanket level trend at minute intervals over the
last hour.
When the display is in the normal mode, trending is active and the
and ꢁ keys enable the user to view the last
12 hours of data, an hour at a time backwards and forwards respectively. The views are labelled with their start
and finish times. The sonar echo profile recorded at the corresponding start time is also displayed.
After reaching the oldest data the ꢁ key is inoperative. Where no data has been recorded there is a gap in the
trend line. A zero value is represented by a line a single-pixel thick. Pressing Esc returns to the real time normal
display.
Note: Do not confuse this trending with data logging which is discussed in more detail later.
The LCD has a back light for operator convenience. This has one of 3 modes selectable using the HMI:
•
•
•
On permanently unless internal temperature too high, in which case automatically off.
Off permanently unless internal temperature is too low, in which case automatically on.
Auto - i.e. off until keypad is actuated, in which case on and stay on for, typically, 5 minutes - on for only 10
seconds if internal temperature too high.
The LCD on the MSL600 is supplemented by a single red LED which indicates the health of the unit. The LED
flashes every 2 seconds (½Hz) to indicate normal operation, whilst a steady illumination or no illumination
indicates a problem.
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4.2 Contrast (viewing angle) control
When the system is making measurements in normal mode the screen contrast or viewing angle can be adjusted.
Whilst holding down the Esc key press either the ꢂ or ꢃ key
Esc and - increases (darkens) the contrast and Esc and ꢃ decreases (lightens) the contrast.
4.3 Keypad and Menu Navigation
Data entry and interrogation is normally achieved using the integral membrane keypad on the MSL600 front
panel, see Figure (9).
Figure (9): Keypad layout
The keypad comprises 6 keys:
•
•
•
Cursor keys (ꢂꢄꢃꢄ ꢄꢁ)
Enter key (ꢅ)
Escape key (Esc)
The four arrow keys allow navigation around the HMI menu structure and the Esc and ꢅ keys allow movement
from one menu level to the next. Each time a key is pressed an audible “beep” is heard. This “beep” can be
turned off via the HMI if required.
To access the main menu (from the normal display, see section 4.1) press ꢅ.
To access a menu option, highlight the option using the ꢂꢄꢃ keys and press ꢅ.
To change a parameter the padlock in the on line/off line menu must be open. This is done by highlighting “Go off
Line” in the main menu and pressing ꢅ. Press ꢅ again and the padlock will open. Press ꢅ again and the padlock
will close.
By pressing Esc repeatedly, the screen will always return to the normal display. Alternatively, pressing and
holding Esc for a few seconds will result in jumping straight back to the Main Menu screen.
If any key other than Esc is held pressed for more than 1 second then it auto repeats. This is particularly useful for
fast scrolling through parameters. Although the display does not show every parameter whilst fast scrolling (it is
only refreshed every 500ms), the key beep (if enabled) is actuated for each parameter.
Movement through the menu structure using the arrows is shown by the titles being highlighted and flashing, i.e.
reversed to showing clear letters on a black background and vice versa. Pressing ꢅ with the title highlighted
enters that part of the menu.
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4.4 Security
The HMI includes a password system which may be used to protect parameters from unauthorised changes and
also to prevent the system from being switched between On and Off-line mode.
The password is in the form of a 4-digit code (or PIN). When the user has entered the correct PIN then the
password is said to be open (else closed). The PIN is a 4-digit code, value 0000 to 9999.
Once the password is open then all parameters may be edited.
A PIN of 0000 means that the password is disabled, i.e. no password is required to edit parameters.
Examining the PIN locally shows “- - - -” unless set to 0000.
When prompting for entering of PIN, the display shows “- - - -”.
A PIN is set or entered by scrolling each of the 4 digits using the
arrows to select the value for each digit.
and ꢁ arrows to select the digit and ꢂ and ꢃ
No PIN is required to navigate the menus or to simply examine parameter values.
Attempting to change a parameter value prompts for the entering of the PIN (if it is not already open). If the
parameter affects outputs, and if On-line, then after entering the PIN the user is offered go Off-line.
If the password is open then the main menu offers the option “Cancel Password” as the default (highest priority)
option. Closing the password does not affect the On line/Off-line status.
The password is automatically closed after 5 minutes without any key press; this does not affect the
On line/Off-line status.
4.5 On-line/Off-line
This feature allows the MSL600 outputs, i.e. its relays and current output to be frozen. Also, when On-line, the
editing of all parameters which may affect these outputs is inhibited.
Off-line inhibits relays and current output.
On-line inhibits the editing of all parameters that may affect the outputs. These include relay, current output and
alarm parameters.
The On line/Off-line state is shown by the padlock symbol at the top left-hand corner of the HMI display (padlock
closed represents On-line).
Go On line/Off-line by selecting the appropriate item in the main menu. As the mode is toggled, a large image of
the Padlock symbol opens and closes. Attempting to edit any parameter can only be performed with the unit
Off-line.
If the system password is closed then the system will prompt for a password, once correctly entered then it
changes as requested.
NOTE: There is no time-out on On-line or Off-line.
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5. Quick start parameters
The system leaves the factory with default values in all the parameters. These values, after installation, allow
immediate operation without any further programming. However, it is recommended for best operation that the
following parameters should be programmed.
In order to get meaningful measurements from the MSL600 in the minimum time only the following parameters
need to be adjusted.
5.1 Tank depth - Bottom reference
An accurate knowledge of the tank depth is a key parameter for the system.
The tank depth is the distance from the front face of the transducer to the bottom of the tank directly under the
transducer [see Figure (10)]. Where the tank bottom slopes, as is often the case, the sludge blanket level, Xm
indicated by the system is therefore relative to this zero reference level.
Tank depth
Sludge blanket interface Xm
0m tank depth
Figure (10): Tank depth parameter
The maximum tank depth that the system will measure is 7.000m (23.00 feet), the minimum is 1.000m (3.3 feet),
do not confuse this with the transducer blanking distance which is discussed elsewhere and is 0.3m (1 foot) by
default.
The tank depth value is stored in the system and used in subsequent calculations. The factory default is 7.000m
(23.00 feet), corresponding to the maximum depth of tank for which the system is specified.
When the unit is powered on for the first time the system makes measurements using this default. It will be
obvious that until the user enters a measured value certain functions, such as current output and displayed
blanket level will not be correct for the installation.
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5.2 Determination of tank depth
The ultimate blanket level measurement accuracy depends upon the accuracy of the value entered for the tank
depth. It is always recommended that this be determined for every installation by the user using a measuring rod
or similar. Alternatively, the user can obtain a workable estimate of the tank depth by adjusting the tank depth
value Off line using the HMI and positioning the bottom echo at the bottom of the profile display.
This only works if a bottom echo is visible and the user must be sure that the echo he is positioning does actually
correspond to the tank bottom. To do this, follow the procedure below:
1.
From the normal display, press ꢅ.
2.
3.
4.
The main menu will appear on the upper right of the display.
Highlight the Go Off line menu option and press ꢅ. The padlock will open.
Press Esc to return to the main menu.
5.
6.
Use the ꢂ and ꢃ keys highlight the INSTALLATION menu option and press ꢅ.
Highlight the Tank depth option and press ꢅ.
7.
To edit the depth press ꢅ.
8.
Use the ꢂ and ꢃ keys to increment and decrement the highlighted digit.
9.
Use the
and ꢁ keys to move from one digit to the next.
10.
11.
When editing has finished press ꢅ to save the value.
The large echo (in most cases this represents the bottom of the tank that the transducer is positioned over)
on the lower left display will move.
12.
13.
14.
Repeat steps 7 to 11 as necessary.
When this echo appears at the bottom of the display the tank depth is set.
ESC to return to main menu.
Please note that to avoid confusing echoes this procedure should be carried out when there is no significant
sludge blanket in the tank.
5.3 Transducer self-cleaning
The transducer self-cleaning is pre-programmed for optimal performance. However, the cleaning cycle can be
changed by following the procedure set out below.
In order to access the transducer cleaning parameters follow the following programming sequence:
1. Press ꢅ to access the main menu.
2. The main menu will appear on the upper right of the display.
3. Highlight the Go Off line menu option and press ꢅ. The padlock will open.
4. Press Esc to return to the main menu.
5. Use the ꢂ and ꢃ keys to highlight the SETUP menu option and press ꢅ.
6. Highlight the DUTY (mode) menu option and press ꢅ.
7. Highlight the CLEANING menu option and press ꢅ.
8. Highlight the Start On menu option and press ꢅ.
9. Use the ꢂ and ꢃ keys to highlight the required option and press ꢅ.
Three options are available;
•
•
•
Auto Clean - This is the default option and means that the MSL600 will automatically carry out a cleaning
cycle for 10 seconds on the hour every hour.
Manual 5s - This allows the user to manually activate a 5 second cleaning cycle at any time after which the
cycle returns to its previous setting (note, the unit must be on line to carry out this process).
Off - The unit will not perform any cleaning cycles.
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5.4 mA current output parameters
The operation of the current output is programmed by four parameters and is always controlled by the sludge
blanket level.
The current output parameters are found in SETUP – OUTPUT – CURRENT OUTPUT.
The parameters are as follows:
ꢀ
Low range val (Lower range value)
This parameter allows the user to reference the programmed minimum current output (0 or 4mA) to any point
in the programmed blanket level measurement range.
The default condition is that the programmed minimum current corresponds to 0m (0 feet), the tank bottom.
ꢀ
Up range val (Upper range value)
This parameter allows the user to reference the maximum 20mA current output to any point in the
programmed blanket level measurement range.
The default condition is that 20mA corresponds automatically to the programmed tank depth parameter less
the top blanking distance. This level is programmed by the tank depth parameter which by default is set to be
7.000m (23.00 feet). The 20mA level for default settings therefore corresponds to a sludge blanket level of
6.7m (22.1 feet)
ꢀ
Alarm action
This parameter is selectable from a list and determines the action to be taken by the current output under
alarm conditions.
The allowed actions are:
•
•
•
Go to 3.6mA
Go to 21mA
Hold last reading
ꢀ
0/4-20mA (0-20mA or 4-20mA setting)
This parameter sets the current output range from a list to be either 0-20 or 4-20mA.
5.5 Current output adjust
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 detailed below:
1. Connect a milliammeter to the terminal block marked CURRENT OUT ISOLATED between the 0V and the IO
connections.
2. Put the system off line so that the ‘Go Off line?’ padlock is open.
3. Access the SETUP – SYSTEM – TEST – CURRENT OUTPUT menu.
4. Select either the “4mA out adjust” or the “20mA out adjust” and press ꢅ.
5. Read the actual current on the calibrated meter.
6. Enter this value in the chosen parameter and press ꢅ.
7. 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 by accessing
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 ‘Go On line?’ padlock is closed.
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5.6 Relay parameters
The MSL600 offers various options for operating its relays. There are 2 relays that are programmable to different
modes, these modes are:
•
•
•
•
•
•
•
•
Alarm
Set point operation
De-sludge
On
Off
None
Fault
Slg Lev Limits (Sludge Level Limits)
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 for Relay 2 default mode is alarm. Relay 3 is permanently
assigned to fault mode (see section 7.6 for further details).
5.7 Alarm
There are six different alarm conditions in the SETUP - OUTPUT - ALARM menu. Each alarm condition 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 or Hold as defined in “Alarm action” in the CURRENT OUTPUT menu.
Relay outputs – The relays energise in the alarm condition if they are programmed in Alarm mode.
The relays or current output must be set up for alarm action for this function to operate. The available alarm
actions are shown in the list below:
•
•
•
•
•
•
•
•
Out of limits
Current saturated
Memory filling
Digital Input
Max Retries
Xdr tilted
Dirty supernatant
Noise Alarm
5.8 Transducer out-of-water time
Certain installations make use of a picket fence thickener or a variety of rotating scrappers and scum boards.
These rotating arms at the surface of the liquid will periodically lift the articulated transducer out of the liquid as
they sweep by.
The transducer includes a (non-mercury) mechanical tilt switch. This is used to indicate when the transducer is
being tilted and lifted out of the water. The MSL600 uses this information to determine whether valid sonar echo
profile data is being received. If not then measurement will pause and outputs will be held until the arm is vertical
again.
When the transducer is tilted a timer is started. The time for which the transducer has been tilted is compared to
a maximum allowed value, programmed by the user. If this time is exceeded then an alarm condition can be
flagged. It is possible to program an alarm relay to respond to this flag. This is intended to detect problems if the
fence should stop under the transducer, etc. The time for which the transducer has been tilted is available as a
Monitor readings parameter (D833).
When the arm returns to the vertical the timer is re-set to zero and if allocated the alarm cancelled.
If the transducer has been out of water for greater than the time allowed then its temperature may be significantly
different to that of the supernatant.
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The transducer may take up to 1 hour to reach thermal equilibrium. Therefore, it may take some time to restore
accurate blanket level readings. When the arm tilts out of the supernatant the MSL600 holds the last supernatant
temperature reading from the transducer. When the transducer falls back into the supernatant the MSL600 starts
to make measurements again.
When the MSL600 measures the supernatant temperature at the transducer, as long as the temperature is within
the programmed normal limits for a supernatant then the system uses this measured temperature for speed of
sound compensation.
If the measured temperature is outside of these limits then the MSL600 uses the last held temperature reading.
This state will continue until a valid temperature reading is again obtained from the transducer in the supernatant.
The upper and lower temperature points are programmable as HMI Engineering parameters. The default values
are -5 to +40°C (23 to 104 deg F). The lower temperature should always be less than the upper and valid entries
should be limited to temperatures between -40°C and +85°C (-40 to 185 deg F).
Because the tilt switch is sensitive to vibration as well as angle it is de-bounced in software. An engineering
parameter exists in the HMI to allow this function to be turned on and off, in the case of for example a particularly
vibration prone bridge.
5.9 Digital input
Parameter P340 is used to assign the status of the digital input to an alarm relay if desired. This allows the user
to stop measurement whilst the blanket is known to be disturbed and meaningful results would not be obtained.
E.g. during high in-flow or when top water level falls below the transducer face and normal measurements can’t
be performed.
When the digital input is active all measurements continue as normal and the LED still flashes. The sonar pulse
echo display continues to update with live data. However, the blanket level is held at its last value. The trend
graph continues to update, relays and current output remain active, and logging continues using the held blanket
level.
Digital input active means either a short across the terminals, i.e. from a contact closure or a PLC driving low, i.e.
going to ‘0’.
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6. Detailed operation
The following sections go into programming the system in more detail.
6.1 The menu structure
From the normal display, pressing the ꢅ key will enter the menu system, see Figure (11). A full menu structure is
shown in section 11.
Main menu item
Go On line ?
INSTALLATION
SETUP
Tank Depth
Xdr Tilt Time
Tag No.
Description
DUTY (Mode)
CLEANING
DE-SLUDGE
Digital i/p action
OUTPUT
CURRENT OUTPUT
RELAY
ALARM
FAULT
DISPLAY
LOGGING
ENGINEERING
SYSTEM
TEST
COMMS
SETTINGS
PIN
FIXED
MONITOR
DIRECT
READINGS
DIAGNOSTICS
Pxxx
Dxxx
Figure (11): Menu structure
The top-level menu contains the list of available menu items:
Menu Item
Description
Go On-line (Go off-line)
INSTALLATION
SETUP
Allows programming when off line
Installation parameters
Setup parameters
Diagnostic and performance type parameters
Allows direct access to parameters
MONITOR
DIRECT
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To move up and down the list, use the ꢂ and ꢃ arrows until the required menu item is highlighted, then use the ꢅ
key to enter that menu option.
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.
6.2 Parameter editing
Once the required parameter is displayed, select it and press the ꢅ key (note that menu groups are in upper case
letters, parameters are in upper and lower case).
Note also that there are two parameter types:
•
•
Read/Write - these parameters are normally preceded by a “P” - e.g. P200. They may be modified by the user.
Read Only - these parameters are normally preceded by a “D” - e.g. D800. They are either fixed within the
MSL600 or produced by data processing and thus may not be modified by the user. Examples are Software
Revision and Serial Number.
The desired parameter may now be modified. Numeric values are edited one digit at a time, the
select each digit by highlighting them and the ꢂ and ꢃ keys increment and decrement each digit.
and ꢁ keys
Alternatively, some parameters are in the form of a list. These are edited in a similar way, selecting with the ꢅ
key and using the ꢂ and ꢃ keys to scroll through the list.
When the displayed value is correct, press the ꢅ key to store the value.
6.3 Scrolling
When a parameter is displayed but no digit is highlighted, the ꢂ and ꢃ keys will scroll to the next parameter in
numeric order. This provides an alternative method of accessing parameters without using the menu facility.
6.4 Direct access
It is possible to access the parameters directly from the main menu if the parameter number is known.
From the normal display press the ꢅ key to display the main menu on the top right hand side of the display.
Use the arrow keys to scroll down until the menu option DIRECT is highlighted and press the ꢅ key.
Highlight either Pxxx or Dxxx
(Pxxx are user configurable parameters and Dxxx are non-configurable diagnostic parameters).
Enter the parameter number to be edited and press ꢅ.
If an invalid number is entered then the next lowest parameter is displayed.
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7. Application parameters
The following section details each parameter.
7.1 Main menu parameters
The following functions are available at the top level of the menu structure.
Note: A full menu structure is shown in section 11.
7.1.1 Cancel password
This is a dynamic parameter; it only appears when password has been opened. This parameter allows the user
to cancel the need for password entry before access to parameter editing is allowed.
7.1.2 Go Online/Offline
This is a dynamic parameter; it changes according to whether the system is online or offline. The padlock icon
will be displayed in a corresponding open or closed state.
7.2 Installation parameters
The following parameters are intended primarily for use during system installation.
7.2.1 Tank Depth – P101
The tank depth is the distance from the front face of the transducer to the bottom of the tank directly under the
transducer and is the user programmable range for zero blanket level.
Parameter values (Metric)
Parameter values (Imperial)
Default
7.000m
Min
1.000m
Max
7.000m
Default
23.00 ft
Min
3.30 ft
Max
23.00 ft
7.2.2 Xdr Tilt Time – P103
This is the maximum time for which transducer can be out of the water before the system registers a fault.
The parameter is either disabled by entering a value of zero or programmed with a value in minutes.
The default is a value of 0 minutes, disabled.
Parameter values:
Default
0 (Disabled)
Min
1
Max
15
7.2.3 Tag No. – P242
This is a user defined alpha-numeric parameter. Any string up to 8 characters long may be entered using the keypad.
This will usually correspond to the instrument’s asset number or some other such identifier on the user’s schedule.
The following characters are allowed:
!”#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_
Parameter values:
Default
MSL600
Min
-
Max
-
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7.2.4 Description – P240
This is a user defined alpha-numeric parameter. Any string up to 12 characters long may be entered using the
keypad. This will usually be a description of the application.
The following characters are allowed:
!”#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_
Parameter values:
Default
CLARIFIER1
Min
-
Max
-
7.3 De-sludge parameters
The following parameters relate to the de-sludge function and are found in the setup menu.
Note that minimum and maximum parameters relating to time are 00:00 and 23:59 respectively. Minimum and
maximum parameters relating to sludge level are 0.000 to 7.000m (0.00 to 23.00 feet)
Note: A full menu structure is shown in section 11.
7.3.1 Start On - P250
Use this parameter to select how the de-sludge cycle starts.
The selectable options are:
ꢀ
ꢀ
ꢀ
None
Time
Sludge Level
The parameter defaults to “None” which means it is not used.
Parameter values:
Default
None
Min
-
Max
-
7.3.2 Stop On - P251
Use this parameter to select how the de-sludge cycle stops.
The selectable options are:
ꢀ
ꢀ
ꢀ
None
Time
Sludge Level
The parameter defaults to "None" which means it is not used.
Parameter values:
Default
None
Min
-
Max
-
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7.3.3 Stop If - P252
Use this parameter to select if it is necessary to override the “Stop on” condition.
The selectable options are:
ꢀ
ꢀ
Not used
Sludge Level
The parameter defaults to none which means it is not used.
Parameter values:
Default
None
Min
-
Max
-
7.3.4 Start Time - P253
This is the time of the day at which the first de-sludge operation starts. The time is programmed in hours and
minutes. This parameter is set up in conjunction with the de-sludge Interval P254.
Parameter values:
Default
07:00
Min
-
Max
-
7.3.5 Interval - P254
The parameter is the interval between de-sludge events.
After a start time has been programmed, the interval between each de-sludge needs to be programmed.
For example, if it is required that the de-sludge cycle starts at 7:00am each morning then 07:00 is entered in P253.
If it is then required that a de-sludge cycle is carried out every hour thereafter, 01:00 is entered in P254.
Parameter values:
Default
01:00
Min
-
Max
-
7.3.6 Max Retries - P257
This parameter is the maximum number of retries allowed following an unsuccessful de-sludge cycle. If the
maximum retries is exceeded, and a relay is programmed, and allocated in alarm mode, it can be used to signal
this fact.
A retry occurs if the start condition is still present when the stop condition occurs or if a relay maximum run time is
exceeded and the stop condition has not been reached.
To prevent a relay from remaining on, the relay minimum off time must be programmed (see P415).
Parameter values:
Default
10
Min
0
Max
250
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7.4 Cleaning parameters
The following parameter relates to the cleaning function.
Note: A full menu structure is shown in section 11.
7.4.1 Start On - P260
Use this parameter to select how the cleaning cycle starts.
The selectable options are:
ꢀ
ꢀ
ꢀ
AutoClean
Manual 5s
Off
The default is “AutoClean”.
7.4.2 Interval - P264
Use this parameter to programme the interval between cleaning cycles (see also P444 - cleaning duration).
This parameter is programmed in hours and minutes.
Default
1:00
Min
0:10
Max
1:39
7.4.3 Cleaning Time - P444
The duration of the cleaning cycle can be programmed in seconds
Default
0:10
Min
0:10
Max
0:20
7.5 mA output parameters
The following parameters are used to program the mA current output.
7.5.1 Lower Range Val - P400
This is the sludge blanket level in metres (or feet if Imperial version) for the minimum mA output, either 0 or 4mA
as programmed using P403.
Parameter values (Metric)
Parameter values (Imperial)
Default
0.000m
Min
0.000m
Max
7.000m
Default
0.00 ft
Min
0.00 ft
Max
23.00 ft
7.5.2 Upper Range Val - P401
This is the sludge blanket level in metres (or feet if Imperial version) for the maximum mA output.
This value is by default set to "Auto".
Parameter values (Metric)
Parameter values (Imperial)
Default
Auto
Min
0.000m
Max
7.000m
Default
Auto
Min
0.00 ft
Max
23.00 ft
Note: In the case of the default setting the upper limit is defined as being at the programmed transducer blanking
distance P623 from the front of the transducer face.
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7.5.3 Alarm Action - P402
This parameter is used to select the desired action which is taken by the mA output when the system is in an
alarm condition.
The allowed options are:
ꢀ
ꢀ
ꢀ
Go to 3.6mA
Go to 21mA
Hold (last reading)
The default action is to go to 3.6mA.
7.5.4 0/4-20mA - P403
This parameter is used to select the desired range of the mA output from a list.
The allowed options are:
ꢀ
ꢀ
0-20mA
4-20mA
The default is 4-20mA.
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7.6 Relay parameters
The following parameters are used to program the 2 available relays RL1 and RL2, which are controlled by the
sludge blanket level. The mode of relay RL3 is fixed to fault indication.
Note: A full menu structure is shown in section 11.
P
RL1
410
411
412
413
414
415
RL2
420
421
422
423
424
425
Mode
On Point
Off Point
Min ON
Max ON
Min OFF
Table (B): Relay Parameter numbers
7.6.1 Relay RL1 mode (P410) and RL2 mode (P420)
The mode of operation, or function, of the relay can be selected from a list:
A) Alarm............................................................see page 32
B) Fault .............................................................see page 33
C) Set Point.......................................................see page 33
D) De-sludge.....................................................see page 33
E) On.................................................................see page 33
F) Off.................................................................see page 33
G) None.............................................................see page 33
H) Slg lev limits (Sludge Level Limits) ...............see page 33
i) Temp OL (Temperature Over Limits)............see page 33
7.6.1.1 Alarm mode (relay RL1 and RL2 parameters P540 to 552)
There are several alarms which can be assigned to a relay. When an alarm condition occurs it may be signalled
by relay, current, both relay and current, or not at all. Alarm conditions are listed below:
ꢀ
ꢀ
ꢀ
Out of Limits - P540
The sludge blanket level is outside the limits set in the relay on and off point parameters
mA o/p Sat. (Current Saturated) - P541
The current output is outside the limits set in the current output parameters.
Memory Filling - P542
The logging memory is filling. This alarm condition is activated when the remaining memory is less than the
percentage programmed by the user in ‘Low Mem Alarm’ P593.
ꢀ
ꢀ
Digital Input - P543
If the digital input is active then the relay indicates alarms.
Max Retries - P544
If at the end of a de-sludge operation the start condition is still present for a programmed number of retries
then the relay alarms.
ꢀ
ꢀ
Xdr Tilted - P550
An alarm can be activated after the transducer has been out of water for a user-programmed length of time.
Dirty S-nat - P551
If the supernatant gives a high degree of returned echo (indicating a significant number of suspended
particles) then an alarm can be activated.
ꢀ
Noise Alarm - P552
An alarm is activated if the background noise exceeds the pre-set limit set in parameter P622.
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7.6.1.2 Fault mode (relay RL1 and RL2 parameters P560 to P570)
There are several fault conditions which can be assigned to a relay. Fault conditions may be selected to be
signalled by relay, current, both relay and current, or not at all.
Messages describing active faults are automatically written to the lower HMI display.
When a fault condition occurs, a relay configured in fault mode will de-energise. Fault conditions are listed
below:
ꢀ
Memory Fault - P560
A memory fault occurs if system memory has been corrupted. On occasion the control unit may indicate a
memory fault when first powered up. This is normal because the unit is automatically loading default
settings in to the memory. After the first power up this fault message should not occur again. All control
units are first powered up prior to leaving the factory. If the memory fault message appears after the unit
has been switched on and off at least once then consult the factory.
ꢀ
ꢀ
CU Temp Fault - P561
A fault is indicated if the temperature within the control unit exceeds pre-set limits.
Xdr Temp Fault - P563
A fault is indicated if the temperature within the transducer unit exceeds pre-set limits.
7.6.1.3 Set point mode (relay RL1 and RL2)
The relays can be operated in set point mode. See also section 7.6.2.
For example:
If it is required to turn a pump on using relay 1 when the sludge blanket reaches a depth of 3.5m (11.5 ft), then
3.5 (11.5) is programmed in to P411 (RL1 on point).
Note:
It is advisable that the "On" and "Off" points are always set to different values, nominally 50mm (2 in/0.16ft)
apart.
7.6.1.4 De-sludge mode (relay RL1 and RL2)
The relay can be programmed to operate in de-sludge mode. The de-sludge parameters are described in
section 7.3 of the manual.
7.6.1.5 On mode (relay RL1 and RL2)
The relays can be switched permanently on if required.
7.6.1.6 Off mode (relay RL1 and RL2)
The relays can be switched permanently off if required.
7.6.1.7 None mode (relay RL1 and RL2)
If the relay mode is set to "None" then the relay remains in its last valid state i.e. if the relay is "On" and the
mode is changed to "None", the relay remains "On".
7.6.1.8 Sludge Level Limits mode (relay RL1 and RL2)
If the relay mode is set to Slg Lev Limits, the relay is energised above the Relay On point. It is also energised
below the Relay Off point. However, the relay is de-energised in between the "On" and "Off" points.
7.6.1.9 Temperature Over Limits mode (relay RL1 and RL2)
If the relay mode is set to Temp OL, the relay is energised above the minimum and maximum control unit
operating temperatures. The relay is de-energised while temperatures are within the normal operating range.
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7.6.2 Relay On and Off Points
Relay On Point for RL1 (P411) and RL2 (P421)
This is the sludge blanket level at which the Set Point mode relay turns on i.e. between 0.000 and 7.000m
(0.00 to 23.00 ft). See also section 7.6.1.3 for related information.
Relay OFF Point for RL1 (P412) and RL2 (P422)
This is the sludge blanket level at which the Set Point mode relay turns off i.e. between 0.000 and 7.000m
(0.00 to 23.00 ft). See also section 7.6.1.3 for related information.
7.6.3 Relay overrides (Min ON, Max ON, and Min OFF)
Relay minimum on time (Min ON) for RL1 (P413) and RL2 (P423)
This is the minimum time for which the relay will remain on in non-alarm or fault modes. This takes priority over
the maximum on time. It is important to note that this function only operates when the minimum off time is set to a
non-zero value. This parameter can be set between 00:00 and 99.59 in mm:ss.
Relay maximum on time Max ON for RL1 (P414) and RL2 (P424)
This is the maximum time for which the relay will remain on in non-alarm or fault modes. It is important to note
that this function only operates when the minimum off time is set to a non-zero value. This parameter can be set
between 00:00 and 99.59 in mm:ss.
Relay minimum off time Min OFF for RL1 (P415) and RL2 (P425)
Once the relay has turned off this is the minimum time before the relay will turn on again. If both minimum and
maximum on times are set to zero (default) then they are not used. This parameter can be set between 00:00 and
99.59 in mm:ss.
7.7 Display parameters (HMI)
7.7.1 HMI upper, middle, and lower display options
The top right hand section of the main display, the HMI, can be adjusted to suit your requirements.
The HMI display is split into three regions:
1. Display Upper - P570 (Default – Time)
2. Display Middle - P571 (Default – Sludge level)
3. Display Lower - P572 (default – Date)
What is displayed in these sections is selected from a list as follows:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Time
Rad msg count
None
Sludge Level
Range
% mA Output
mA Output
RL1 run-time
RL2 run-time
Clean run-time
Internal Temp
Xducer Temp
Noise level
% Free Lg Mem
Description
Tag
Date
Note: The current output and relays are always controlled by sludge level regardless of display selection.
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7.7.2 Backlight On/Off - P575
The default for the display back light is "Auto". It can be switched to "Off" or "On". If set to Auto it is on when a key
is pressed. The back light will automatically turn off after 5 minutes or if the internal temperature is too high and
exceeds its programmed limits. It will turn on if the internal controller temperature is too low and is less than the
programmed limit.
7.7.3 Clear Trend
The lower right of the display shows a trend of the sludge blanket position over the last 12 hours. Pressing ꢅ
when in the Clear Trend menu will clear this trend information. When the data is cleared the unit indicates this by
displaying ‘Done’. This does NOT clear logged data.
7.7.4 Clear Profile
The lower left of the display shows a profile of the sludge blanket. Pressing ꢅ when in the Clear Profile menu will
clear this information. When the data is cleared the unit indicates this by displaying ‘Done’
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7.8 Logging parameters
Logged data can be downloaded and analysed via the RS232 port and Mobrey Measurement Log View Software
(via a PC). For copies of this software, please contact Mobrey Measurement Sales.
Note: A full menu structure is shown in section 11.
7.8.1 Log Interval - P590
The MSL600 can log the value (not the units) of the parameter that is shown on the middle of the HMI Display.
The MSL600 can store up to 4800 records. The interval between each record being stored is programmed in
minutes in P590, the Logging interval. The unit takes a reading every 5 seconds and averages the readings over
the programmed logging interval.
The unit automatically stores the maximum recorded value that occurred in the previous 24-hour period (from 12
midnight to 12 midnight).
Parameter values:
Default
5
Min
0
Max
99
7.8.2 Fast log - P591
The control unit will automatically override the logging interval and log at a rate of one record per minute when the
sludge blanket level is above the level in metres (Feet – Imperial) set in the fast Log parameter. If the parameter
is set to zero then fast log is not used.
Parameter values (Metric)
Parameter values (Imperial)
Default
0.000
Min
0.000
Max
7.000
Default
0.000
Min
0.000
Max
23.00
7.8.3 Data Overwrite - P592
If this parameter is set to "On" then old data will be over written when the memory is full. If it is set to "Off" then old
data is not over written and the unit stops logging when the memory is full.
Parameter values:
Default
On
Min
Off
Max
-
7.8.4 Low Mem Alarm - P593
An alarm can be activated if the memory reaches this level when set as a % of full memory.
Parameter Values:
Default
0
Min
0
Max
99
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7.9
Engineering parameters
The MSL600 blanket echo processing algorithm has been optimised for use on various types of municipal and
industrial sludge. The user can select from either of two municipal sludge types depending on the application.
The following parameters have been extensively tested and, once MUNICIPAL 1 or MUNICIPAL 2 sludge types
have been chosen, the user should not need to adjust them. However, different sludge types have widely
varying ultrasonic properties and settling characteristics, therefore the following parameters are adjustable in
order that the MSL600 can be set up for different types of sludge.
Note:
It is strongly recommended that if the default parameters do not give reliable operation, or if use on industrial
sludge is required, then advice is sought from Mobrey Measurement Customer Support.
7.9.1 Alg. Select – P620
Use this parameter to select an algorithm which is optimised for municipal or industrial sludge.
The allowed options are:
•
Municipal 1 (This covers most Municipal Wastewater applications e.g. Primary and Secondary settlement
tanks, Picket fence thickeners)
•
Municipal 2 (This covers Industrial applications such as Industrial effluent final settlement, clarifiers, slurry
settlement etc.)
The default is Municipal 1. After selecting the algorithm to use, there are a number of common algorithm
parameters which can be adjusted using the HMI.
7.9.2 Common algorithm parameters P621 to P629
Common algorithm parameters affect the way in which both Municipal 1 and Municipal 2 algorithms work.
7.9.2.1 Ave. Cyc Count – P621
The number of cycles, in powers of 2 over which the unit will average raw sonar echo profiles to remove any
spurious reflections from such things as air bubbles and floating solids.
Since a complete measurement cycle takes 2 seconds then the averaging cycle count can effectively damp the
noise over a period between 4 seconds and 2048 seconds(or 34 minutes, which is a substantial proportion of a
rotation of most bridges).
The default value is 128 cycles. The minimum is 2 and the maximum is 1024.
Parameter values:
Default
128
Min
2
Max
1024
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7.9.2.2 Noise Alrm Lev – P622
The unit automatically monitors the background electronic noise floor as a % of display width, see parameter
D834. If this level exceeds the Noise Alarm Lev value, programmed as a % of display width then an alarm can
be indicated by allocating an output in P552, Noise Alarm.
The default value is 25%.
Parameter values:
Default
25
Min
0
Max
100
7.9.2.3 Top Blanking – P623
This is the minimum operating range for the transducer in metres (feet – imperial). This parameter allows the
user to program a region in front of the transducer which is not used by the system.
This is useful if there are any fixed obstructions in front of the transducer which cannot be moved or otherwise
avoided.
This parameter is also useful when programming the industrial algorithm for avoiding floating or settling debris in
front of the transducer.
The default value is 0.3 metres / 1 foot.
Parameter values (metric)
Parameter values (imperial)
Default
0.300
Min
0.100
Max
7.000
Default
1.00
Min
0.33
Max
23.00
7.9.2.4 Damping – P624
It is unlikely that the blanket level will change by a large amount on a short time scale. The settling process is
typically fairly slow. If the system should want to respond to noise or stray echoes from bubbles or debris this
parameter, which is programmed as a time measured in seconds damps out rapid fluctuations in the measured
sludge blanket level.
The default value is 60 seconds.
Parameter values:
Default
60
Min
0
Max
9999
7.9.2.5 Upr S-nat Temp – P625
This is the value used for temperature compensation if the measured supernatant temperature should exceed
this value. Valid entries are between –35 and +85°C (-30 to 185 deg F).
The default is +40°C (105 deg F)
Parameter values (metric)
Parameter values (imperial)
Default
40
Min
-35
Max
+85
Default
105
Min
-30
Max
185
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7.9.2.6 Lwr S-nat Temp – P626
This value is used for temperature compensation if the measured supernatant temperature is below this value.
The lower temperature (P626) must always be less than the upper (P625).
Valid entries are between –40 and +85°C (-40 to 185 deg F).
The default is -5°C (25 deg F)
Parameter values (metric)
Parameter values (imperial)
Default
-5
Min
-40
Max
+85
Default
25
Min
-40
Max
185
7.9.2.7 SoS constant - P627
The speed of sound at 0 C (32 deg F) for a particular supernatant can be programmed in m/s (ft/s imperial).
o
Default (metric m/s)
1402.0
Default (imperial ft/s)
4599.7
7.9.2.8 Bottom Blanking – P628
This parameter allows the user to program a region close to the bottom of the tank which is not used by the
system for normal blanket level measurement.
This is useful if there are any fixed obstructions in front of the transducer close to the bottom of the tank which
cannot be moved or otherwise avoided.
The default value is 0.0 metres / 0 foot
Parameter values (metric)
Parameter values (imperial)
Default
0.000
Min
0.000
Max
9.999
Default
0.00
Min
0.00
Max
33.00
7.9.2.9 Level Offset – P629
This parameter is used to provide an offset to the normal displayed sludge blanket level (D800). The value may
be entered as a positive or negative value to provide the required offset to the normal displayed sludge blanket
level.
Default is 0.0.
Parameter values (metric)
Parameter values (imperial)
Default
0.0
Min
-0.99
Max
0.99
Default
0.0
Min
-3.0
Max
3.0
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7.9.3 Municipal 1 parameters P630 to P637
When the Municipal 1 algorithm is selected using parameter P620 (page 37), only the following specific
parameters need to be adjusted.
7.9.3.1 Significance – P630
This parameter is used to select which echo in the echo profile that the Municipal 1 algorithm chooses as the
most likely to correspond to the real sludge blanket level.
The algorithm scans the echo profile for echoes. It calculates the mean and standard deviation of amplitudes
for these echoes. Depending on the P630 setting, the algorithm can be programmed to select the first significant
echo it comes to, measured from the surface of the supernatant or the most significant echo it detects in the
entire profile.
The allowed options are:
•
•
First
Most (default)
7.9.3.2 Sharp Echo Reject – P631
Electrical noise and other types of false echo are characteristically shorter in duration than the real echo from a
sludge blanket. This parameter allows fine tuning of the value which the municipal algorithm uses as a window
width to separate out these echoes.
Note:
This is a key system parameter and should not be adjusted without asking for advice from Mobrey Measurement.
Parameter values:
Default
8
Min
5
Max
30
7.9.3.3 Lost Echo Rnge - P633
The lost echo range is the distance, split equally above and below, that the device will still look for an echo
before going to hold last reading as set in lost echo delay (P637).
The parameter P633 is set in number of samples. However, each sample equates to approximately 25mm (1”).
Therefore when set with the default value of 24, the device will look for a valid echo in a window 300mm (12”)
above and 300mm (12”) below its last valid value. If no valid echo is present, it will hold its last reading for the
programmed amount as set in P637.
Parameter values:
Default
24
Min
1
Max
410
7.9.3.4 Threshold – P634
The Municipal 1 algorithm scans the echo profile for echoes. It calculates the mean and standard deviation of
amplitudes for these echoes. In order to be significant, the echoes must exceed a threshold value determined in
terms of the standard deviation of the echo amplitudes.
The default value is 0.5 standard deviations.
Parameter values:
Default
0.5
Min
0.00
Max
9.99
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7.9.3.5 Noise SD Mult – P635
The Municipal 1 algorithm scans the echo profile for echoes. Prior to sending pulses to the transducer, the
noise floor is measured. It calculates the mean and standard deviation of fluctuations in the noise floor.
In order to be significant, the echo from a blanket must not only exceed a threshold value determined in terms of
the standard deviation of the echo amplitudes (P634) but it must also exceed a threshold value determined in
terms of the standard deviation of the noise floor (P635).
The default value is 2.75 standard deviations.
Parameter values:
Default
2.75
Min
0.00
Max
9.99
7.9.3.6 Dirty Mult – P636
It is often the case that the supernatant becomes dirty. In this case, large echoes can be seen directly in front of
the transducer that should not necessarily be ignored or blanked out. If the amplitude of these signals is typically
above 50% of the screen width, it is likely the supernatant was dirty and an alarm would be helpful in this
situation. This can be achieved by programming a relay to operate in alarm mode and setting the alarm
condition to Dirty S-nat.
Parameter P636 is used to linearly scale the default threshold of 50%. The default value is a multiplier of 0.5,
which represents 50% of the maximum displayable amplitude.
Parameter values:
Default
0.5
Min
0.00
Max
2.00
7.9.3.7 Lost Echo Time - P637
The Municipal 1 algorithm has a facility such that if the echo is lost from a set range (see P633) then the last
reading is held for the programmed time. This allows the unit to accommodate any false echoes from targets
other than the sludge blanket. In other words, the device is able to recognise that the sludge level does not
change rapidly.
The parameter can be set between 1 to 255 minutes
Parameter values:
Default
30
Min
1
Max
255
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7.9.4 Municipal 2 parameter P640
Only one specific parameter, P640, needs to be adjusted when the Municipal 2 algorithm is selected.
Industrial blankets are typically much denser and more substantial than municipal sludge found in a
conventional wastewater plant. For this reason, the echo profile from an industrial sludge typically only displays
one distinct echo.
7.9.4.1 Threshld Offset – P640
The echo from the blanket will produce a signal which is visible above the electronic noise floor on the echo
profile display.
The threshold offset parameter is the offset of the threshold which the user wishes to set above the noise floor.
Both the noise level, D834 and the threshold offset are expressed as a % of full screen.
The noise level can be viewed as a diagnostic parameter from the monitor menu. The first point in the echo
profile which exceeds the threshold level is determined by the algorithm to be at the blanket level.
Remember that;
Threshold level = Threshld Offset (P640) + Noise Level (D834)
When setting this parameter, remember that the echo amplitude can get larger or smaller over a period of time
during normal operation of the system. This is because the consistency of the sludge varies with time and
position in the settling tank as the bridge rotates over it.
Floating debris close to the transducer can give echoes which will exceed the threshold level. It is suggested
that in this case the blanking distance, P623 be extended to include this region in the echo profile.
The default value is 30%.
Parameter values:
Default
30
Min
0
Max
100
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7.10 System parameters
These parameters can be used to test the MSL600 hardware.
Note: A full menu structure is shown in section 11.
7.10.1 AUTO CYCLE function
The Auto Cycle or Self-Test function has the effect of automatically ramping up the sludge blanket level value
between its minimum and maximum values so as to exercise the current output and relays without the actual
blanket level changing.
With the unit On-line, this parameter is accessed via SETUP-SYSTEM-TEST-AUTOCYCLE. Once the menu item
AUTOCYCLE is entered press ꢅ . The on screen display prompts you to press ꢂ to start the AUTOCYCLE.
AUTOCYCLE is stopped by pressing ꢂ. Press ESC to return to main menu.
A complete cycle is executed in about 100 seconds. It may be paused and re-started using the ꢂ arrow key.
During Auto Cycle mode, the MSL600 system continues to measure the blanket level in the background.
On exiting the Auto Cycle mode the sludge blanket level immediately takes on the value based on the MSL600
sensor inputs.
7.10.2 DISPLAY test
This function allows the user to test all the pixels in the MSL600 display.
The Display Test function displays the product name, full software version number, and exercises all pixels.
The MSL600 remains in Display Test mode until the Esc key is pressed. The same data, excluding the test
pattern, is displayed at power-up.
7.10.3 Current Output test parameters P700 to P702
This function allows the user to test the current output on the MSL600.
7.10.3.1 4mA Out Adjust - P700
The current output is calibrated in the factory and should not require any adjustment. However, if required, it is
possible to adjust the 4mA point using a calibrated meter (see section 5.5).
7.10.3.2 20mA Out adjust - P701
The current output is calibrated in the factory and should not require any adjustment. However, if required, it is
possible to adjust the 20mA point using a calibrated meter (see section 5.5).
7.10.3.3 Set Current - P702
It is possible to force the current output to a value to check loop equipment. Any value between 0 and 20mA
can be programmed (see section 5.5). When the unit is returned to On Line mode the current output reverts to
normal.
7.10.4 LOAD DEFAULTS function
The unit can be reset to its factory-default configuration at any time by selecting the Load Defaults menu option.
Pressing ꢅ loads the default values when in this menu. This action does not change the language setting or the
base units selected (metric or imperial).
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7.10.5 COMMS parameters P710 to P716
These parameters are used for serial RS232 communications.
7.10.5.1 Address - P710
Poll Address. The default value of this parameter should not be changed. The parameter is included in the
menu system for future software updates. Default = 0
7.10.5.2 Interface - P711
The type of serial interface. The default value of this parameter should not be changed. The parameter is
included in the menu system for future software updates. Default = log download
7.10.5.3 Baud Rate - P712
The speed of transfer of the interface in bit/s. The default value of this parameter should not be changed. The
parameter is included in the menu system for future software updates. Default = 9600
7.10.5.4 Start Bits - P713
The number of start bits. The default value of this parameter should not be changed. The parameter is included
in the menu system for future software updates. Default = 1
7.10.5.5 Data Bits - P714
The number of data bits between start and parity bit. The default value of this parameter should not be changed.
The parameter is included in the menu system for future software updates. Default = 8
7.10.5.6 Parity - P715
Whether an even or odd parity check bit has been added. The default value of this parameter should not be
changed. The parameter is included in the menu system for future software updates. Default = even
7.10.5.7 Stop Bits - P716
The number of stop bits. The default value of this parameter should not be changed. The parameter is included
in the menu system for future software updates. Default = 1
7.10.6 SETTINGS parameters P730 to P737 and BASE UNITS selection
7.10.6.1 Base units
The user can select either metric units (metres, deg C) or imperial units (Feet, degrees F)
7.10.6.2 Date - P730
The current date is entered here.
7.10.6.3 Time - P731
The current time is entered here.
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7.10.6.4 Date format - P734
The format for the date can be chosen from a list:
ꢀ
ꢀ
ꢀ
yy/mm/dd
dd/mm/yy (Default metric)
mm/dd/yy (Default imperial)
7.10.6.5 Keypad Sound - P735
Each time a key is pressed, a beep sounds as confirmation of the key being pressed. This audio feedback can
be turned off. The default is on.
7.10.6.6 Language - P737
The HMI default language is English. The user can chose from a list of English, Francais, Deutsch, or Svenska.
7.10.7 PIN parameter P740
7.10.7.1 PIN - Personal Identification Code - P740
The unit can be protected from unauthorised use by programming a PIN. Access is via SETUP – SYSTEM –
PIN – PIN. Any four digit numeric characters can be programmed as a PIN. In the PIN menu enter 0000 to
remove the password.
Please ensure that the PIN is not forgotten. If the password is forgotten, the factory must be consulted.
Please provide the full serial number of the unit which can normally be found on the external label.
7.10.8 FIXED parameters D750 to D753
7.10.8.1 Model Code - D750
The model code of the control unit.
7.10.8.2 Serial No. - D751
The serial number of the control unit.
7.10.8.3 H/W Revision - D752
The hardware revision of the control unit.
7.10.8.4 S/W Version - D753
The software revision. This is displayed to one decimal place. Performing the Display test function (section Error!
Reference source not found.) will show the full software version.
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7.11 Readings and diagnostics parameters
The user can not alter the value of readings or diagnostics parameters within the MONITOR menu.
Note: A full menu structure is shown in section 11.
7.11.1 Readings parameters D800 to D834
7.11.1.1 Sludge Level - D800
The main process variable, the sludge blanket level in metres (feet – imperial).
Note:
If P629 Level offset is being used, this value will be added or subtracted from the normal sludge blanket level
and displayed as D800.
7.11.1.2 Target Range - D801
The actual distance from the transducer to the sludge blanket interface in metres (feet – imperial).
7.11.1.3 % Current Output - D805
Indicates % of current output
7.11.1.4 Current Output - D806
The actual current output in mA.
7.11.1.5 Relay Status - D820
This diagnostic parameter indicates the status of all the relays including relay three, the fault relay and relay
four, the compressor relay.
The relay status is indicated by a 1 or a 0. A 1 indicates the relay is energised, a 0 indicates the relay is de-
energised.
The display shows the state in the following format: 0000
Reading from left to right the first 0 is relay 1, the second 0 is relay 2, the third 0 is relay 3 and the fourth 0 is
relay 4.
7.11.1.6 RL * Runtime – (RL 1-D821, RL 2-D822, Cleaning time-824)
The total length of time in hours and minutes that a relay has been energised is monitored from this parameter.
Entering zero for the hours and minutes will reset the parameter.
7.11.1.7 Alarm Report - D830
When an alarm is detected then it can be viewed by accessing this parameter.
Press ꢅ to highlight the first alarm report item. The user can step through the current active alarms using the ꢂ
and ꢃ keys.
7.11.1.8 Fault Report - D831
When a fault is detected then it can be viewed by accessing this parameter. In normal operation, the highest
priority active fault condition is also displayed in the lower display. Press ꢅ to highlight the first fault report item.
The user can scroll through the current active faults using the ꢂ and ꢃ keys.
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7.11.1.9 Xdr Tilt Time - D833
A diagnostic parameter indicating the time for which the transducer has been out of the water in min:secs.
7.11.1.10 Noise Level - D834
A diagnostic parameter indicating the noise level in the tank as a % of full screen.
7.11.2 Diagnostics parameters D835 to D852
7.11.2.1 Input Status - D835
A diagnostic parameter indicating the status of the digital input, 1 indicating active, 0 indicating not active.
7.11.2.2 LE Count – D836
This gives an indication as to reliability of signal.
7.11.2.3 Radio Channel - D842
This parameter is not used with this version of the MSL600.
7.11.2.4 Radio Address - D843
This parameter is not used with this version of the MSL600.
7.11.2.5 CU Temperature (Temperature of Control Unit) - D844
View this parameter to see the current temperature in °C (imperial – degrees F) inside the MSL600 control unit.
This temperature is used for control of the LCD back light, turning it on to generate a degree of internal heating
in cold weather and off when hot to avoid overheating.
7.11.2.6 Xducer Temp (Temperature of Transducer) - D845
View this parameter to see the current temperature in °C (imperial - degrees F) of the transducer. This
temperature is used in the compensation of the speed of sound in the supernatant.
7.11.2.7 Free Memory (Logging Memory Free) - D846
View this parameter to see the amount of MSL600 logging memory remaining as a % before the end of the
buffer is reached and over writing at the start begins. This parameter is compatible with Mobrey Measurement
Log View software.
7.11.2.8 Date of Change (Last date of Change) - D848
View this parameter to see the date of the last change to the configuration of the MSL600. This parameter can
be used to detect unauthorised access.
7.11.2.9 Echo Sharpness – D849
View this parameter to estimate the size of the echo. A typical reading would be between 20 and 30.
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7.11.2.10 Speed of Sound - D850
View this parameter to see the temperature compensated speed of sound in the supernatant which the
MSL600 is using in its calculation of sludge blanket level in m/s (imperial – ft/s).
7.11.2.11 Max Xdr Temp - D851
View this parameter to see the maximum temperature in °C (imperial – degrees F) which has been
experienced by the transducer.
This log is reset by direct entry of a nominal ambient value of 20°C (68 degrees F).
7.11.2.12 Min Xdr Temp - D852
View this parameter to see the minimum temperature in °C (imperial degrees F) that has been experienced by
the transducer. This log is reset by direct entry of a nominal ambient value of 20°C (68 degrees F).
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8. Technical reference
8.1 Transmit pulse and echo processing
The transducer and it’s transmit and receive circuitry is optimized to work at 1.0MHz.
Some sludge blankets are indistinct.
The algorithm has been optimised to average out and ignore unwanted signals produced by particles in the
supernatant, whilst detecting and measuring the wanted signals from the sludge blanket.
Although the algorithm is designed to largely ignore particles in the supernatant, the information (size and
distance) is retained allowing a warning of this condition to be indicated.
9. Maintenance
The MSL600 should require no maintenance. It has no user serviceable parts inside.
Although the MSL603 transducer should keep its front face clean by self-cleaning the transducer should be
inspected periodically to ensure that algae or floating debris is not collecting on its side or transducer face.
10. Troubleshooting
Refer to factory
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11. Programming chart
Main Menu Option
Sub-menu Level 1
Sub-menu Level 2
Sub-menu Level 3
Parameter Title
-
Par No.
-
Cancel Password (only seen if the password is active)
Go Offline ?
INSTALLATION
-
-
Tank Depth
Xdr Tilt Time
Tag No.
Description
Start On
P101
P103
P242
P240
P250
P251
P252
P253
P254
P257
P260
P264
P444
P340
P400
P401
P402
P403
P410
P411
P412
P413
P414
P415
P420
P421
P422
P423
P424
P425
P430
P540
P541
P542
P543
P544
P550
P551
P552
P560
P561
P563
P570
P571
P572
P575
-
SETUP
DUTY(Mode)
DESLUDGE
Stop On
Stop If
Start Time
Interval
Max Retries
Start On
CLEANING
Interval
Cleaning Time
Digital i/p action
Low Range Val
Up Range Val
Alarm Action
0/4-20mA
OUTPUT
CURRENT OUTPUT
RELAY
RELAY 1
Relay 1 Mode
RL1 On Point
RL1 Off Point
RL1 Min ON
RL1 Max ON
RL1 Min OFF
Relay 2 Mode
RL2 On Point
RL2 Off Point
RL2 Min ON
RL2 Max ON
RL2 Min OFF
Relay 3 Mode
Out of Limits
mA o/p Sat.
Memory Filling
Digital Input
Max Retries
Xdr Tilted
Dirty S-nat
Noise Alarm
Memory Fault
CU Temp Fault
Xdr Temp Fault
Display Upper
Display Middle
Display Lower
Backlight On/Off
-
RELAY 2
RELAY 3
ALARM
FAULT
DISPLAY
Clear Trend
Clear Profile
-
-
LOGGING
Log Interval
Fast Log
Data Overwrite
Low Mem Alarm
P590
P591
P592
P593
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MSL600
Programming chart continued…
ENGINEERING
Alg. Select
P620
CONFIG ALGORITHM COMMON
Ave. Cyc Count
Noise Alrm Lev
Top Blanking
Bottom Blanking
Damping
Upr S-nat Temp
Lwr S-nat Temp
SoS constant
Level Offset
Significance
Sharp Echo Reject
Lost Echo Rnge
Threshold
P621
P622
P623
P628
P624
P625
P626
P627
P629
P630
P631
P633
P634
P635
P636
P637
P640
-
MUNICIPAL 1
Noise SD Mult
Dirty Mult
Lost Echo Time
Thrshld Offset
-
MUNICIPAL 2
AUTO-CYCLE
DISPLAY
SYSTEM
TEST
-
-
CURRENT OUTPUT
4mA Out Adjust
20mA Out Adjust
Set Current
-
P700
P701
P702
-
LOAD DEFAULTS
COMMS
Address
Interface
Baud Rate
Start Bits
Data Bits
Parity
Stop Bits
Radio Timeout
Radio On/Off
Base Units
Date
P710
P711
P712
P713
P714
P715
P716
P722
P723
-
P730
P731
P734
P735
P737
P740
D750
D751
D752
D753
RADIO
SETTINGS
FIXED
Time
Date Format
Keypad Sound
Language
PIN
Model Code
Serial No.
H/W Revision
S/W Version
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MSL600
Programming chart continued…
Sludge Level
Target Range
% Current Out
Current Output
Relay Status
D800
D801
D805
D806
D820
D821
D822
D824
D830
MONITOR
READINGS
Relay
RL1 Run-Time
Relay Run-time
RL2 Run-Time
Cleaning Time
Alarm Report
Fault Report
Xdr Tilt Time
Noise Level
Input Status
CU Temperature
Xducer Temp
Free Memory
Date of Change
Echo Sharpness
Speed of Sound
Max Xdr Temp
Min Xdr Temp
Radio Msg Count
Radio STX Count
Radio Channel
Radio Address
-
D831
D833
D834
D835
D844
D845
D846
D848
D849
D850
D851
D852
D853
D854
D842
D843
DIAGNOSTICS
RADIO
Pxxx
Dxxx
DIRECT
-
Note: The Radio parameters are not used with this version of the MSL600.
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MSL600
12. Specification
12.1 MSL600
Model No.
Operating principle
Range
MSL600
Ultrasonic sonar
7.0m (23 feet)
0.3m (1 foot)
Dead band
Accuracy
+/-35mm (+/- 1.4”)
25mm (1”)
Resolution
o
Temperature limits C - Sensor
-40 to +65 (-40 to 150 degrees F)
o
Temperature limits C - Control unit
-20 to +55 (-4 to 130 degrees F)
Temperature compensation
Power Supply – AC
Power Supply – Hz
Power rating
Integral
Switch selected 115 or 230Vac
50/60Hz
140VA
Outputs
Relays
2 programmable relays
1 fault relay
Analogue
0/4-20mA
Display
LCD 240 x 128 pixels with back light
RS232
Communications
Enclosure
IP rating
IP66
Material
ABS
Dimensions W x H x D
355 x 237 x 95mm (14 x 9.3 x 3.75 INS)
Without compressor housing. See dimensional drawing
for full details.
Programming
Via integral membrane keypad
Compressor driven air cleaning
Transducer cleaning method
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Weight
Enclosure & compressor housing
Transducer & mounting bracket
Approvals
7.0 Kg / 15.4 lbs
12.0 Kg / 26.4 lbs
CE, LVD, EMC
Max Altitude
2000m
Max Humidity
95% RH
2-1EC664
Pollution Degree
Additional specification notes:
Programming menu using Mobrey HMI.
Sludge blanket level from bottom of the clarifier.
Icon enunciators display the relay status.
The display gives a graphical presentation of sludge profile through the clarifier.
A trend graph indicates the sludge level for the last 12 hour(s).
The MSL600 has a single red LED to indicate power on. This LED flashes on as the transducer pulses.
Continuous On = fault
12.2 MSL603 transducer
IP Rating
Material
Cable
IP68 / Type 6P
Ceramic face, PTFE nozzle, UPVC body
Alpha xtra-guard 4 P/N 45272, 10 metres
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13. Dimensional drawings
Figure (12): MSL600 Bridge mounted unit
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Figure (13): MSL600 and MSL603 assembly
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14. MSL603 transducer cable extension
Parts required:
ITT Cannon TNM connectors (Cannon part no.) [R.S. stock no.]
1 off Reversed receptacle (192993-0071) [265-9727]
1 off Reversed plug
2 off Shielded endbell
4 off Solder cup pin
4 off Solder cup socket
(192993-0051) [265-9812]
(192993-0081) [265-9777]
(192900-0634) [329-8660] to fit in the receptacle
(192900-0632) [329-8676] to fit in the plug
Fitting instructions:
PLEASE NOTE - THIS CABLE CARRIES LOW LEVEL SIGNALS WHICH ARE VULNERABLE TO ELECTRO-
MAGNETIC INTERFERENCE. IT IS IMPORTANT FOR THE CORRECT OPERATION OF THE MSL600 THAT THE
BRAIDED SCREEN, AS WELL AS THE INTERNAL CORES ARE CONNECTED AS SPECIFIED.
The cable comprises a brown and white twisted pair, and a black and white twisted pair. During the following
procedure, care should be taken to ensure that the two white wires are connected correctly.
The Shielded Endbell is supplied with assembly instructions, which includes an exploded drawing. In the following
description, the part references [in square brackets] refer this drawing.
ꢀ
Terminate the new length of cable to look like the existing transducer cable as follows: The drain wire has a yellow
sleeve, the white wire, that is twisted with the brown wire, has a red sleeve. All conductors should preferably have
crimped ferrules for insertion in the terminal blocks.
ꢀ
Cut off the terminations on the existing transducer cable
The following instructions refer to both plug and receptacle assemblies:
ꢀ
ꢀ
ꢀ
Slide the endbell components [parts 1 to 5] on to the cable.
Strip the outer insulation back 38mm
Pull the exposed braid back over the outer insulation and remove the inner foils to expose the twisted cores for the
full 38mm.
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Using an indelible marker, mark the white wire in the white/black twisted pair.
Untwist the wires and strip the insulation back 4mm.
Solder pins/sockets to wires.
Fit the 'O' ring from the endbell kit in the groove of the connector.
Push the support sleeve [part 6] onto the cable, and over the braid.
Insert the pins/sockets into the back of the connector as follows: position A - marked white, B - black, C - white, D -
brown. The pins/sockets must be pressed well into the housing, using a narrow implement, to snap into place.
Pull the support sleeve [part 6] forwards towards the connector, and draw the braid over the spring elements [of part 6].
Pull the grounding ring [part 5] forwards and snap it onto the support sleeve [part 6] trapping the braid.
Screw together the remaining elements of the endbell. Note that ITT Cannon recommend a torque setting for the
housing [part 4].
ꢀ
ꢀ
ꢀ
The air hose is extended using the nozzle (RS stock no. 795-348) and a hose (RS-stock no, 721-4013, 20m, black).
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The Emerson logo is a trade mark and service mark of Emerson Electric Co.
Rosemount is a registered trademark of Rosemount Inc.
Mobrey is a registered trademark of Mobrey Ltd.
All other marks are the property of their respective owners.
We reserve the right to modify or improve the designs or specifications of product and services at any time without notice.
© 2012 Mobrey Ltd. All rights reserved.
International:
Americas:
Emerson Process Management
Mobrey Ltd.
Emerson Process Management
Rosemount Measurement
8200 Market Boulevard
Chanhassen, MN 55317 USA
Tel (USA) 1 800 999 9307
Tel (International) +1 952 906 8888
Fax +1 952 906 8889
158 Edinburgh Avenue,
Slough, Berks, SL1 4UE, UK
T +44 (0) 1753 756600
F +44 (0) 1753 823589
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