Teledyne Slow Cooker Model 2010B User Manual

Thermal Conductivity Analyzer

OPERATING INSTRUCTIONS FOR

Model 2010B

Thermal Conductivity Analyzer

Teledyne Analytical Instruments

0.0

AL-1

Anlz

2010B

Thermal Conductivity Analyzer

DANGER

HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING

SYSTEM.

PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.

HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST

FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.

P/N M70845

11/22/00

ECO # 00-0517

ONLYAUTHORIZEDPERSONNELSHOULDCONDUCTMAINTENANCEAND/ORSERVICING. BEFORE

CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR/

MANAGER.

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Thermal Conductivity Analyzer

Table of Contents

Specific Model Information ................................. iv

Part I: Control Unit, Model 2010B .........Part I: 1-1

Part II: Analysis Unit, Model 2010B......Part II: 1-1

Appendix ......................................................... A-1

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Model 2010B

Specific Model Information

The instrument for which this manual was supplied may incorporate one or more

options not supplied in the standard instrument. Commonly available options are listed

below, with check boxes. Any that are incorporated in the instrument for which this

manual is supplied are indicated by a check mark in the box.

Instrument Serial Number: _______________________

Options Included in the Instrument with the Above Serial Number:

❑ C:

Auto Calibration valves (zero/span/sample) built-in gas control

valves are electronically controlled to provide synchronization

with the analyzer’s operations.

❑ G:

❑ H:

❑ K:

Stainless steel cell block with nickel filaments and Stainless

Steel fittings and tubing.

Stainless steel cell block with gold filaments for corrosive gas

streams and Stainless Steel fittings and tubing.

19" Rack Mount option with one or two analyzer Control

Units installed and ready to mount in a standard rack.

❑ K2:

19" Rack Mount option with two Control Units mounted.

❑ K3:

19" Rack Mount option with one Control Unit mounted and a

blank cover installed in the second Control Unit location.

❑ L:

Gas selector panel consisting of sample/ref flow meters and

control valves for metering input of sample/calibrations support

gases.

❑ F:

Flame Arrestors for Class 1, Div. 1, Groups C/D service.

❑ P:

Flame Arrestors for Class 1, Div. 1, Groups C/D service, and

Auto Cal valves option (Ref. C above) and GP use.

❑ Q:

Flame Arrestors for Group B (hydrogen) service, and Auto Cal

valves option (Ref. C above)

❑ O:

Flame Arrestors for Group B (hydrogen)

Sealed Reference Cell

❑ R:

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Thermal Conductivity Analyzer

Table of Contents

1 Introduction

1.1 Overview ........................................................................ 1-1

1.2 Typical Applications ....................................................... 1-2

1.3 Main Features of the Analyzer ....................................... 1-2

1.4 Model Designations ....................................................... 1-3

1.5 Operator Interface (Front Panel) .................................... 1-3

1.6 Recognizing Difference Between LCD & VFD ............... 1-5

1.7 Equipment Interface (Rear Panel).................................. 1-5

1.8 Gas Connections ........................................................... 1-7

2 Operational Theory

2.1 Introduction .................................................................... 2-1

2.2 Sensor Theory ............................................................... 2-1

2.2.1 Sensor Configuration .............................................. 2-1

2.2.2 Calibration ............................................................... 2-2

2.2.3 Effects of Flowrate and Gas Density ....................... 2-3

2.2.4 Measurement Results ............................................. 2-3

2.3 Electronics and Signal Processing ................................ 2-3

2.4 Temperature Control ...................................................... 2-5

3 Installation

3.1 Unpacking the Analyzer ................................................. 3-1

3.2 Mounting the Control Unit .............................................. 3-1

3.3 Electrical Connections (Rear Panel) .............................. 3-3

3.3.1 Primary Input Power .............................................. 3-4

3.3.2 Fuse Installation..................................................... 3-4

3.3.3 Analog Outputs ...................................................... 3-4

3.3.4 Alarm Relays ......................................................... 3-6

3.3.5 Digital Remote Cal Inputs ...................................... 3-7

3.3.6 Range ID Relays.................................................... 3-8

3.3.7 Network I/O............................................................ 3-8

3.3.8 RS-232 Port ........................................................... 3-9

3.3.9 Remote Probe Connector ...................................... 3-9

3.4 Testing the System ........................................................3-16

3.5 Warm Up at Power Up ...................................................3-16

4 Operation

4.1 Introduction .................................................................... 4-1

4.2 Using the Data Entry and Function Buttons................... 4-1

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Model 2010B

4.3 The System Function ..................................................... 4-4

4.3.1 Setting the Display ................................................. 4-5

4.3.2 Setting up an Auto-Cal........................................... 4-5

4.3.3 Password Protection .............................................. 4-6

4.3.3.1 Entering the Password................................... 4-7

4.3.3.2 Installing or Changing the Password ............. 4-7

4.3.4 Logging Out ........................................................... 4-9

4.3.5 System Self-Diagnostic Test .................................. 4-9

4.3.6 The Model Screen ................................................. 4-10

4.3.7 Checking Linearity with Algorithm.......................... 4-10

4.4 The Zero and Span Functions ....................................... 4-11

4.4.1 Zero Cal ................................................................. 4-12

4.4.1.1 Auto Mode Zeroing ........................................ 4-12

4.4.1.2 Manual Mode Zeroing.................................... 4-13

4.4.1.3 Cell Failure..................................................... 4-14

4.4.2 Span Cal ................................................................ 4-14

4.4.2.1 Auto Mode Spanning ..................................... 4-15

4.4.2.2 Manual Mode Spanning................................. 4-15

4.5 The Alarms Function...................................................... 4-16

4.6 The Range Select Function ........................................... 4-18

4.6.1 Manual (Select/Define Range) Screen .................. 4-19

4.6.2 Auto (Single Application) Screen ........................... 4-19

4.6.3 Precautions............................................................ 4-21

4.7 The Analyze Function .................................................... 4-21

4.8 Programming ................................................................. 4-22

4.8.1 The Set Range Screen .......................................... 4-23

4.8.2 The Curve Algorithm Screen ................................. 4-25

4.8.2.1 Checking the Linearization ............................ 4-25

4.8.2.2 Manual Mode Linearization............................ 4-26

4.8.2.3 Auto Mode Linearization ................................ 4-27

4.9 Special Function Setup .................................................. 4-28

4.9.1 Output Signal Reversal .......................................... 4.28

4.9.2 Special - Inverting Output ...................................... 4-28

4.9.3 Special - Polarity Coding........................................ 4-29

4.9.4 Special - Nonlinear Application Gain Preset .......... 4-29

Maintenance

5.1 Routine Maintenance ..................................................... 5-1

5.2 System Self Diagnostic Test........................................... 5-1

5.3 VFD Display ................................................................... 5-2

5.4 Fuse Replacement......................................................... 5-2

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Thermal Conductivity Analyzer

5.5 Major Internal Components ........................................... 5-3

5.6 Cleaning......................................................................... 5-5

5.7 Phone Numbers ............................................................. 5-5

Appendix

A-1 Specifications................................................................. A-1

A-2 Recommended 2-Year Spare Parts List......................... A-3

A-3 Drawing List ................................................................... A-4

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Model 2010B

DANGER

COMBUSTIBLE GAS USAGE WARNING

The customer should ensure that the principles of operating of

this equipment are well understood by the user. Misuse of this

product in any manner, tampering with its components, or

unauthorized substitution of any component may adversely

affect the safety of this instrument.

Since the use of this instrument is beyond the control of

Teledyne, no responsibility by Teledyne, its affiliates, and

agents for damage or injury from misuse or neglect of this

equipment is implied or assumed.

viii

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Thermal Conductivity Analyzer

Part I: Control Unit

Introduction

1.1 Overview

TheModel2010isafamilyofsplitconfigurationconductivityanalyzers.

EachanalyzerconsistofaControlUnitsuitableforinstallationinageneral

purposearea-enclosureratedNEMA-4,andaAnalysisUnitwhichishousedin

anexplosion-proofenclosure. TheAnalysisUnitenclosureisratedforNEMA

4/7 Class I, Div. 1, Groups B,C,D and is approved by U/L and CSA.

TheAnalyticalInstrumentsModel2010BThermalConductivityAnalyzeris

aversatilemicroprocessor-basedinstrumentformeasuringacomponentgasina

backgroundgas,orinaspecificmixtureofbackgroundgases.Itcomparesthe

thermalconductivityofasamplestreamwiththatofareferencegasofknown

composition.The2010Bcan—

•

measure the concentration of one gas in a mixture of two gases.

measure the concentration of a gas in a specific mixture of back-

ground gases.

•

measure the purity of a sample stream containing a single impuri-

ty or a mixture of impurities.

Thestandard2010Bispre-programmedwithautomaticlinearization

algorithmsforalargenumberofgasesandgasmixtures.Thefactorycanaddto

thisdatabaseforcustomapplications,andthesophisticatedusercanaddhis

ownuniqueapplications.

ThismanualsectioncoverstheModel2010BGeneralPurposeflush-panel

andrack-mountcontrolunitsonly.

ManyoftheModel2010Bfeaturescoveredinthismanualareoptional,

selectedaccordingtothecustomersspecificapplication.Refertothespecific

modelinformationsheet(pageIV)fortheoptionsincorporatedintheinstrument.

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1 Introduction

Model 2010B

1.2 Typical Applications

AfewtypicalapplicationsoftheModel2010Bare:

•

Power generation

Airliquefaction

Chemicalreactionmonitoring

Steel manufacturing and heat treating

Petrochemicalprocesscontrol

Qualityassurance

Refrigerationandstorage

Gasproportioningcontrol.

1.3 Main Features of the Analyzer

ThemainfeaturesoftheModel2010BThermalConductivityAnalyzer

include:

•

Three independent, user definable, analysis ranges allow up to

three different gas applications with one concentration range

each, or up to three concentration ranges for a single gas applica-

tion, or any combination.

•

Specialrecalibrationrangeformultipleapplications.Recalibrat-

ing one, recalibrates all.

•

Automatic, independent linearization for each range.

Auto Ranging allows analyzer to automatically select the proper

preset range for a given single application. Manual override

allows the user to lock onto a specific range of interest.

•

RS-232 serial digital port for use with a computer or other digital

communicationsdevice.

Six adjustable concentration set points with two alarms and a system

failurealarmrelay.

•

Extensive self-diagnostic testing, at startup and on demand.

A 2-line alphanumeric display screen, driven by microprocessor

electronics, that continuously prompts and informs the operator.

•

High resolution, accurate indication of target or impurity gas

concentration from large, bright, meter readout. (0-9999 ppm

through 0-100 % depending on types of gas involved.)

Standard, proven sensor cell design.

1-2 Part I

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Thermal Conductivity Analyzer

Part I: Control Unit

•

Wide range of custom applications, ranges, and linearization.

Microprocessorbasedelectronics:8-bitCMOSmicroprocessor

with 32 kB RAM and 128 kB ROM.

•

Autoandremotecalibrationcapabilities.

Four analog outputs: two for measurement (0–1 V dc and Isolat-

ed 4–20 mA dc) and two for range identification.

•

Compact and versatile design: Small footprint, yet internal com-

ponentsareaccessible.

1.4 Model Designations

TheModel2010Bisordinarilycustomprogrammedatthefactorytofitthe

customer’sapplication.Manyparameters,includingthenumberofchannels,the

gasapplication,thematerialsspecificationofthesamplingsystem,andothers,

areoptions.Themostcommonoptions,arecoveredinthismanual.Seethe

SpecificModelInformationchecklistinthefrontmatterofthismanualforthose

thatapplytoyourModel2010Banalyzer.Somestandardmodelsthatarenot

coveredinthismanualarelistedhere.

Models 2000A: Both analysis section and control unit are in a single

generalpurposeenclosure.

Models 2020:

Both the analysis section and control unit are in a single

explosionproofenclosure.

1.5 Operator Interface (Front Panel)

Thestandard2010Bishousedinaruggedmetalcasewithallcontrolsand

displaysaccessiblefromthefrontpanel.SeeFigure1-1.Thefrontpanelhas

thirteenbuttonsforoperatingtheanalyzer,adigitalmeter,andanalphanumeric

display.TheyaredescribedbrieflyhereandindetailintheOperationschapter

ofthismanual.

FunctionKeys:Sixtouch-sensitivemembraneswitchesareusedto

changethespecificfunctionperformedbytheanalyzer:

•

Analyze Perform analysis for target-gas content of a sample

gas.

•

System Performsystem-relatedtasks(describedindetailin

chapter 4, Operation.).

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1 Introduction

Model 2010B

Outer Door

(Open)

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Digital

M eter

Viewing

W indow

0.0

AL-1

Anlz

LCD

Screen

Inner Door

Latch

(Pressing the latch button

will open the inner Door)

Outer Door

Latch

Control

Panel

2010B

Therm al Conductivity Analyzer

Figure 1-1: Model 2010B Front Panel

•

Span

Zero

Alarms Set the alarm setpoints and attributes.

Range Set up the user definable ranges for the instrument.

Span calibrate the analyzer.

Zero calibrate the analyzer.

DataEntryKeys:Sixtouch-sensitivemembraneswitchesareusedto

inputdatatotheinstrumentviathealphanumericVFD(VacuumFluorescent

Display)display:

•

Left & Right Arrows

Selectbetweenfunctionscurrently

displayed on the VFD screen.

Up & Down Arrows

Increment or decrement values of

functionscurrentlydisplayed.

Enter Moves VFD on to the next screen in a series. If none

remains, returns to the Analyze screen.

Escape Moves VFD back to the previous screen in a series. If

none remains, returns to the Analyze screen.

1-4 Part I

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Thermal Conductivity Analyzer

Part I: Control Unit

Digital Meter Display: ThemeterdisplayisaVFDdevicethat

produceslarge,bright,7-segmentnumbersthatarelegibleinanylighting.It

producesacontinuoustracereadoutfrom0-9999ppmoracontinuouspercent

readoutfrom1-100 %.Itisaccurateacrossallanalysisranges.

AlphanumericInterfaceScreen:TheVDFscreenisaneasy-to-use

interfacebetweenoperatorandanalyzer.Itdisplaysvalues,options,and

messagesthatgivetheoperatorimmediatefeedback.

StandbyButton:The Standbyturnsoffthedisplayandoutputs,

butcircuitryisstilloperating.

CAUTION: The power cable must be unplugged to fully

disconnect power from the instrument. When

chassis is exposed or when access door is open

and power cable is connected, use extra care to

avoid contact with live electrical circuits.

AccessDoor:Foraccesstothethermalconductivitysensororthefront

panelelectronics,thefrontpanelswingsopenwhenthelatchintheupperright

cornerofthepanelispressedallthewayinwithanarrowgaugetool.Accessing

themainelectronicscircuitboardrequiresunfasteningrearpanelscrewsand

slidingtheelectronicsdraweroutofthecase.(Seechapter5.)

1.6 Recognizing Difference Between LCD &

VFD

LCD(LiquidCrystalDisplay)hasGREENbackgroundwithBLACK

characters. VFD has DARK background withGREEN characters. In the case

ofVFD (VacuumFluorescentDisplay)-NOCONTRASTADJUSTMENTIS

NEEDED.

1.7 Equipment Interface (Rear Panel)

Therearpanel,showninFigure1-2,containstheelectricalconnectorsfor

externalinputandoutput.Theconnectorsaredescribedbrieflyhereandindetail

inchapter3,Installation.

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1 Introduction

Model 2010B

Figure 1-2: Model 2010B Rear Panel

•

Power Connection

Analog Outputs

85-250 V AC power source.

0-1 V dc concentration plus 0-1 V dc

range ID, and isolated 4-20 mA dc plus

4-20 mA dc range ID.

1-6 Part I

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Thermal Conductivity Analyzer

Part I: Control Unit

•

Alarm Connections

2 concentration alarms and 1 system

alarm.

RS-232 Port

Serialdigitalconcentrationsignaloutput

and control input.

Remote Probe

Remote Span/Zero

Used in the 2010B to interface the

external Analysis Unit.

Digital inputs allow external control of

analyzercalibration.

Calibration Contact To notify external equipment that

instrument is being calibrated and

readings are not monitoring sample.

•

Range ID Contacts

Network I/O

Four separate, dedicated,

range-identificationrelaycontacts(01,

02, 03,CAL).

Serialdigitalcommunicationsforlocal

network access. For future expansion.

Not implemented at this printing.

Note: If you require highly accurate Auto-Cal timing, use external

Auto-Cal control where possible. The internal clock in the

Model 2010B is accurate to 2-3 %. Accordingly, internally

scheduled calibrations can vary 2-3 % per day.

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1 Introduction

Model 2010B

1-8 Part I

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Thermal Conductivity Analyzer

Part I: Control Unit

Operational Theory

2.1 Introduction

The analyzer is composed of two subsystems:

1. ThermalConductivitySensor

2. Electronic Signal Processing, Display and Control.

The sensor is a thermal conductivity comparator that continuously

compares the thermal conductivity of the sample gas with that of a reference

gas having a known conductivity.

The electronic signal processing, display and control subsystem simpli-

fies operation of the analyzer and accurately processes the sampled data. A

microprocessorcontrolsallsignalprocessing, input/output, anddisplay

functions for the analyzer.

2.2 Sensor Theory

For greater clarity, Figure 2-1 presents two different illustrations, (a)

and (b), of the operating principle of the thermal conductivity cell.

2.2.1 Sensor Configuration

The thermal conductivity sensor contains two chambers, one for the

reference gas of known conductivity and one for the sample gas. Each

chamber contains a pair of heated filaments. Depending on its thermal

conductivity, each of the gases conducts a quantity of heat away from the

filaments in its chamber. See Figure 2-1(a).

The resistance of the filaments depends on their temperature. These

filaments are parts of the two legs of a Wheatstone bridge circuit that unbal-

ances if the resistances of its two legs do not match. See Figure 2-1(b).

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2 Operational Theory

Model 2010B

Figure 2-1: Thermal Conductivity Cell Operating Principle

If the thermal conductivities of the gases in the two chambers are

different, the Wheatstone bridge circuit unbalances, causing a current to flow

in its detector circuit. The amount of this current can be an indication of the

amount of impurity in the sample gas, or even an indication of the type of

gas, depending on the known properties of the reference and sample gases.

The temperature of the measuring cell is regulated to within 0.1 °C by a

sophisticated control circuit. Temperature control is precise enough to com-

pensate for diurnal effects in the output over the operating ranges of the

analyzer. (See Specifications in the Appendix for details.)

2.2.2 Calibration

Because analysis by thermal conductivity is not an absolute measure-

ment, calibration gases of known composition are required to fix the upper

and lower parameters (“zero” and “span”) of the range, or ranges, of analy-

sis. These gases must be used periodically, to check the accuracy of the

analyzer.

During calibration, the bridge circuit is balanced, with zero gas against

the reference gas, at one end of the measurement range; and it is sensitized

with span gas against the reference gas at the other end of the measurement

range. The resulting electrical signals are processed by the analyzer electron-

ics to produce a standard 0-1V, or an isolated 4–20 mA dc, output signal, as

described in the next section.

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Thermal Conductivity Analyzer

Part I: Control Unit

2.2.3 Effects of Flowrate and Gas Density

Because the flowrate of the gases in the chambers affects their cooling

of the heated filaments, the flowrate in the chambers must be kept as equal,

constant, and low as possible.

When setting the sample and reference flowrate, note that gases lighter

than air will have an actual flowrate higher than indicated on the flowmeter,

while gases heavier than air will have an actual flowrate lower than indi-

cated. Due to the wide range of gases that are measured with the Thermal

Conductivity Analyzer, the densities of the gases being handled may vary

considerably.

Then, there are limited applications where the reference gas is in a

sealed chamber and does not flow at all. These effects must be taken in

consideration by the user when setting up an analysis.

2.2.4 Measurement Results

Thermal conductivity measurements are nonspecific by nature. This fact

imposes certain limitations and requirements. If the user intends to employ

the analyzer to detect a specific component in a sample stream, the sample

must be composed of the component of interest and one other gas (or spe-

cific, and constant, mixture of gases) in order for the measured heat-transfer

differences to be nonambiguous.

If, on the other hand, the user is primarily interested in the purity of a

process stream, and does not require specific identification of the impurity,

the analyzer can be used on more complex mixtures.

2.3 Electronics and Signal Processing

The Model 2010B Thermal Conductivity Analyzer uses an 8031

microcontroller, Central Processing Unit—(CPU) with 32 kB of RAM and

128 kB of ROM to control all signal processing, input/output, and display

functions for the analyzer. System power is supplied from a universal power

supply module designed to be compatible with any international power

source. (See Major Internal Components in chapter 5 Maintenance for the

location of the power supply and the main electronic PC boards.)

The signal processing electronics including the microprocessor, analog

to digital, and digital to analog converters are located on the Motherboard at

the bottom of the case. The Preamplifier board is mounted on top of the

Motherboard as shown in the figure 5.4. These boards are accessible after

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2 Operational Theory

Model 2010B

removing the back panel. Figure 2-2 is a block diagram of the Analyzer

electronics.

Variable

Differential

Amplifier

Gain

Amplifier

Thermistor

A to D

Converter

To CPU

Sensor

Heater

Auto-

Range

0-1 V dc

Concentration

and Range

Temperature

Control

Digitial to

Analog

Converter

(DAC)

Coarse

Adjustment

4-20 mA dc

Concentration

and Range

Fine

Adjustment

Temperature

Control

Heater

Alarm 1

Alarm 2

Selt-Test Signal to MUX

System

Failure

Alarm

RS-232

Keyboard

Central

Processing

Unit

Range

Contacts (4)

(CPU)

Displays

Processing

External

Valve

Control

Remote Span

Control

Power

Supply

Remote Zero

Control

A to D Conv

Cal

Contact

Figure 2-2: Block Diagram of the Model 2010B Electronics

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Thermal Conductivity Analyzer

Part I: Control Unit

In the presence of dissimilar gases the sensor generates a differential

voltageacrossitsoutputterminals. Adifferentialamplifierconvertsthis

signal to a unipolar signal, which is amplified in the second stage, variable

gain amplifier, which provides automatic range switching under control of

the CPU. The output from the variable gain amplifier is sent to an 18 bit

analog to digital converter.

The digital concentration signal along with input from the Gas Selector

Panel is processed by the CPU and passed on to the 12-bit DAC, which

outputs 0-1 V dc Concentration and Range ID signals. An voltage-to-current

converter provides 4-20 mA dc concentration signal and range ID outputs.

The CPU also provides appropriate control signals to the Displays,

Alarms, and External Valve Controls, and accepts digital inputs for external

Remote Zero and Remote Span commands. It monitors the power supply

through an analog to digital converter as part of the data for the system

failurealarm.

The RS-232 port provides two-way serial digital communications to

and from the CPU. These, and all of the above electrical interface signals are

described in detail in chapter 3 Installation.

2.4. Temperature Control

For accurate analysis the sensor of this instrument is temperature con-

trolled to 50^oC.

The Temperature Control keeps the temperature of the measuring cell

regulated to within 0.1 degree C. A thermistor is used to measure the tem-

perature, and a zero-crossing switch regulates the power in a cartridge-type

heater. The result is a sensor output signal that is temperature independent.

A second temperature control system is used to maintain the Analysis

Unit internal temperature at 22⁰C minimum.

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2 Operational Theory

Model 2010B

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Thermal Conductivity Analyzer

Part I: Control Unit

Installation

Installation of the Model 2010B Analyzer includes:

1. Unpacking

2. Mounting

3. Gas connections

4. Electricalconnections

5. Testing the system.

3.1 Unpacking the Analyzer

The analyzer is shipped ready to install and prepared for operation.

Carefully unpack the analyzer and inspect it for damage. Immediately report

any damage to the shipping agent.

3.2 Mounting the Control Unit

The Model 2010B Control Unit is designed for bulkhead mounting in

general purpose area, NOT for hazardous environments of any type. The

Control Unit is for indoor/outdoor use.

Figure 3-1 is an illustration of the 2010B standard front panel and

mounting bezel. There are four mounting holes—one in each corner of the

rigid frame. See the outline drawing, at the back of this manual for overall

dimensions.

All operator controls are mounted on the inner control panel, which is

hinged on the left edge and doubles as a door to provide access to the internal

components of the instrument. The door will swing open when the button of

the latch is pressed all the way in with a narrow gauge tool (less than 0.18

inch wide), such as a small hex wrench or screwdriver Allow clearance for

the door to open in a 90-degree arc of radius 11.75 inches. See Figure 3-2.

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3 Installation

Model 2010B

NPT Fittings

supplied by

customer

Viewing

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Outer Door

Latch

HHinge

Figure 3-1: Front Panel of the Model 2010B Control Unit

Figure 3-2: Required Front Door Clearance

3-2 Part I

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Thermal Conductivity Analyzer

Part I: Control Unit

3.3 Electrical Connections (Rear Panel)

Figure 3-3 shows the Model 2010B Electrical Connector Panel. There

are terminal blocks for connecting power, communications, and both digital

and analog concentration outputs.

For safe connections, ensure that no uninsulated wire extends outside of

the connectors they are attached to. Stripped wire ends must insert com-

pletely into terminal blocks. No uninsulated wiring should be able to come in

contact with fingers, tools or clothing during normal operation.

Figure 3-3: Rear Panel of the Model 2010B

3.3.1 Primary Input Power

The power terminal block and fuse receptacles are located in the same

rearpanelassembly.

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3 Installation

Model 2010B

DANGER: POWER IS APPLIED TO THE INSTRUMENT'S CIR-

CUITRY AS LONG AS THE INSTRUMENT IS CON-

NECTED TO THE POWER SOURCE. THE RED I/O

SWITCH ON THE FRONT PANEL IS FOR SWITCH-

ING POWER ON OR OFF TO THE DISPLAYS AND

OUTPUTS ONLY.

NOTE:

AC POWER MAY BE PRESENT ON THE RELAY

CONTACTS WHEN THE POWER CORD IS RE-

MOVED!

The Control Unit is universal power 100-240V, 50-60 Hz. The Analy-

sis Unit requires 110 or 220 VAC and is selectable via switch located inside

theexplosion-proofenclosure.

3.3.2 Fuse Installation

The fuse receptacles accepts European size fuses only (5x20mm). Both

sides of the line are fused. If the European size fuses are selected, both sides

at the line will be fused. Be sure to install the proper fuse as part of installa-

tion. (See Fuse Replacement in chapter 5, maintenance.)

3.3.3 Analog Outputs

There are four DC output signal connectors with spring terminals on the

panel. There are two wires per output with the polarity noted. See Figure 3-

4. The outputs are:

0–1 V dc % of Range: Voltageriseslinearlywithincreasingconcentration,

from 0 V at 0 concentration to 1 V at full scale.

(Full scale = 100% of programmable range.)

0–1 V dc Range ID:

0.25 V = Range 1, 0.5 V = Range 2, 0.75 V =

Range 3, 1 V = Cal Range.

4–20 mA dc % Range: Current rises linearly with concentration, from 4

mA at 0 concentration to 20 mA at full scale. (Full

scale = 100% of programmable range.)

4–20 mA dc Range ID: 8 mA = Range 1, 12 mA = Range 2, 16 mA =

Range 3, 20 mA = Range 4.

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Thermal Conductivity Analyzer

Part I: Control Unit

Figure 3-4: Analog Output Connections

Examples:

The analog output signal has a voltage which depends on gas concen-

tration relative to the full scale of the range. To relate the signal output to the

actual concentration, it is necessary to know what range the instrument is

currently on, especially when the analyzer is in the autoranging mode.

The signal output for concentration is linear over the currently selected

analysis range. For example, if the analyzer is set on a range that was defined

as 0–10 % hydrogen, then the output would be as shown in Table 3-1.

Table 3-1: Analog Concentration Output—Example

Percent

Voltage Signal Current Signal

Hydrogen Output (V dc)

Output (mA dc)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

4.0

5.6

7.2

8.8

10.4

12.0

13.6

15.2

16.8

18.4

20.0

(Continued)

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3 Installation

Model 2010B

To provide an indication of the range, the Range ID analog output

terminals are used. They generate a steady preset voltage (or current when

using the current outputs) to represent a particular range. Table 3-2 gives the

range ID output for each analysis range.

Table 3-2: Analog Range ID Output—Example

Range

Voltage (V)

Current (mA) Application

Range 1

0.25

0-1 % H₂in N2

0-10 % H₂in N2

0-1 % H₂in Air

0-1 % H₂in N2

Range 2

0.50

0.75

1.00

Range 3

Range 4 (Cal)

3.3.4 Alarm Relays

The three alarm-circuit connectors are spring terminals for making

connections to internal alarm relay contacts. Each provides a set of Form C

contacts for each type of alarm. Each has both normally open and normally

closed contact connections. The contact connections are indicated by dia-

grams on the rear panel. They are capable of switching up to 3 amperes at

250 V ac into a resistive load. See Figure 3-5. The connectors are:

Threshold Alarm 1: • Can be configured as high (actuates when concen-

tration is above threshold), or low (actuates when

concentrationisbelowthreshold).

• Can be configured as fail-safe or non-fail-safe.

• Can be configured as latching or nonlatching.

• Can be configured out (defeated).

Threshold Alarm 2: • Can be configured as high (actuates when concen-

tration is above threshold), or low (actuates when

concentrationisbelowthreshold).

• Can be configured as fail-safe or non-fail-safe.

• Can be configured as latching or nonlatching.

• Can be configured out (defeated).

SystemAlarm:

Actuates when DC power supplied to circuits is

unacceptable in one or more parameters. Permanently

configured as fail-safe and latching. Cannot be de-

feated.

Actuates when cell can not balance during zero

calibration.

Actuates when span parameter out off its limited

parameter.

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Thermal Conductivity Analyzer

Part I: Control Unit

Actuates when self test fails.

(Reset by pressing I/O button to remove power. Then

press I/O again and any other button EXCEPT

Systemtoresume.

Further detail can be found in chapter 4, section 4-5.

Figure 3-5: Types of Relay Contacts

3.3.5 Digital Remote Cal Inputs

Accept 0 V (off) or 24 V dc (on) inputs for remote control of calibra-

tion. (See Remote Calibration Protocol below.)

Zero:

Floating input. 5 to 24 V input across the + and – terminals

puts the analyzer into the Zero mode. Either side may be

grounded at the source of the signal. A synchronous signal

must open and close the external gas control valves appropri-

ately. See 3.3.9 Remote Probe Connector. (With the –C

option,theinternalvalvesoperateautomatically.)

Span:

Floating input. 5 to 24 V input across the + and – terminals

puts the analyzer into the Span mode. Either side may be

grounded at the source of the signal. A synchronous signal

must open and close the external gas control valves appropri-

ately. See 3.3.9 Remote Probe Connector. (With the –C

option,theinternalvalvesoperateautomatically.)

Cal Contact: This relay contact is closed while analyzer is spanning

and/or zeroing. (See Remote Calibration Protocol below.)

Remote Calibration Protocol: To properly time the Digital Remote

Cal Inputs to the Model 2010B Analyzer, the customer's controller must

monitor the Cal Relay Contact.

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3 Installation

Model 2010B

When the contact is OPEN, the analyzer is analyzing, the Remote Cal

Inputs are being polled, and a zero or span command can be sent.

When the contact is CLOSED, the analyzer is already calibrating. It

will ignore your request to calibrate, and it will not remember that request.

Once a zero or span command is sent, and acknowledged (contact

closes), release it. If the command is continued until after the zero or span is

complete, the calibration will repeat and the Cal Relay Contact (CRC) will

closeagain.

When the contact is closed, the display would display the last reading of

the gas concentration value and output signal would output the last reading

from the sample gas (SAMPLE and HOLD).

Forexample:

1) Test the CRC. When the CRC is open, Send a zero command

until the CRC closes (The CRC will close quickly.)

2) When the CRC closes, remove the zero command.

3) When CRC opens again, send a span command until the CRC

closes. (The CRC will close quickly.)

4) When the CRC closes, remove the span command.

When CRC opens again, zero and span are done, and the sample is

being analyzed.

Note: The Remote Probe connector (paragraph 3.3.9) provides

signals to operate the zero and span gas valves synchro-

nously. However, if you have the –C, -P, or -Q Internal valve

option, which includes zero and span gas inputs, the 2010B

automatically selects the zero, span and sample gas flow.

3.3.6 Range ID Relays

Four dedicated Range ID relay contacts. For any single application they

are assigned to relays in ascending order. For example: if all ranges have the

same application, then the lowest range is assigned to the Range 1 ID relay,

and the highest range is assigned to the Range 3 ID relay. Range 4 is the Cal

Range ID relay.

3.3.7 NetworkI/O

A serial digital input/output for local network protocol. At this printing,

this port is not yet functional. It is to be used in future versions of the instru-

ment.

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Thermal Conductivity Analyzer

3.3.8 RS-232 Port

Part I: Control Unit

The digital signal output is a standard RS-232 serial communications

port used to connect the analyzer to a computer, terminal, or other digital

device. It requires a standard 9-pin D connector.

Output: The data output is status information, in digital form, updated

every two seconds. Status is reported in the following order:

•

The concentration in ppm or percent

The range in use (01 = Range 1, 02 = Range 2, 03 = Range 3,

CAL = Range 4)

•

The scale of the range (0-100 %, etc)

Which alarms—if any—are disabled (AL–x DISABLED)

Which alarms—if any—are tripped (AL–x ON).

Each status output is followed by a carriage return and line feed.

Input: The input functions using RS-232 that have been implemented

to date are described in Table 3-3.

Table 3-3: Commands via RS-232 Input

Command

as<enter>

az<enter>

rp<enter>

Description

Immediatelystartsanautospan.

Immediatelystartsanautozero.

Allows reprogramming of the APPLICATION (gas use)

and ALGORITHM (linearization) System functions.

st<enter>

Toggling input. Stops/Starts any status message output from

the RS-232, until st<enter> is sent again.

rm1<enter>

rm2<enter>

rm3<enter>

rm4<enter>

ra<enter>

Range manual 1

Range manual 2

Range manual 3

Range manual CAL

Range auto

Implementation: The RS-232 protocol allows some flexibility in its

implementation. Table 3-4 lists certain RS-232 values that are required by

the Model 2010B implementation.

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3 Installation

Model 2010B

Table 3-4: Required RS-232 Options

Parameter

Setting

Baud 2400

Byte

Parity

Stop Bits

8 bits

none

MessageInterval

2 seconds

3.3.9 Remote Probe Connector

The 2010B is a single-split configuration analyzer, the Remote Probe

connector is used to interface the Analysis Unit. See Figure 3-6.

SPA N IN

SAM PLE IN

ZE RO IN

EXH AUST

+15V

Turn cw to hold

ccw to

loosen w ire.

Switching

G round

Insert wire

here.

Figure 3-6: Remote Probe Connector Pinouts

The voltage from these outputs is nominally 0 V for the OFF and

15 V dc for the ON conditions. The maximum combined current that can be

pulled from these output lines is 100 mA. (If two lines are ON at the same

time, each must be limited to 50 mA, etc.) If more current and/or a different

voltage is required, use a relay, power amplifier, or other matching circuitry

to provide the actual driving current.

In addition, each individual line has a series FET with a nominal ON

resistance of 5 ohms (9 ohms worst case). This could limit the obtainable

voltage, depending on the load impedance applied. See Figure 3-7.

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Thermal Conductivity Analyzer

Part I: Control Unit

Figure 3-7: FET Series Resistance

3.4 Testing the System

Before plugging the instrument into the power source:

•

Check the integrity and accuracy of the gas connections. Make

sure there are no leaks.

Check the integrity and accuracy of the electrical connections.

Make sure there are no exposed conductors

Check that the pressure and flow of all gases are within the

recommended levels, and appropriate for your application.

Power up the system, and test it by performing the following

operations:

1. Repeat the Self-Diagnostic Test as described in chapter 4, section

4.3.5.

3.5 Warm Up at Power Up

Every time the unit is turned on, the instrument stays with the introduc-

tion screen for thirty minutes. This is to allow the cell to come up to tem-

perature (50^oC). The only way to bypass this warm up period is by pressing

any key once, such as the Enter key.

The instrument warms up for half an hour so that it will not receive a

remote calibration signal, send false readings to a monitor system, or, again,

be calibrated by an untrained operator while the cell is cold.

NOTE:There is no feedback on whether the working temperature

has been achieved by cell to the software. If instrument power

is interrupted for only a brief time, the instrument will wait

thirty minutes again. Press the ENTER key to bypass self-

diagnostic mode.

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3 Installation

Model 2010B

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Thermal Conductivity Analyzer

Part I: Control Unit

Operation

4.1 Introduction

AlthoughtheModel2010Bisusuallyprogrammedtoyourapplicationat

thefactory,itcanbefurtherconfiguredattheoperatorlevel,oreven,cautious-

ly,reprogrammed.Dependingonthespecificsoftheapplication,thismight

includeallorasubsetofthefollowingprocedures:

•

Settingsystemparameters:

•

Establish a security password, if desired, requiring Operator

to log in.

•

Establish and start an automatic calibration cycle, if desired.

•

RoutineOperation:

•

Calibratetheinstrument.

Choose autoranging or select a fixed range of analysis.

Set alarm setpoints, and modes of alarm operation (latching,

fail-safe,etc).

•

Program/Reprogramtheanalyzer:

•

Define new applications.

Linearize your ranges.

Ifyouchoosenottousepasswordprotection,thedefaultpasswordis

automaticallydisplayedonthepasswordscreenwhenyoustartup,andyou

simplypressEnterforaccesstoallfunctionsoftheanalyzer.

4.2 Using the Data Entry and Function

Buttons

DataEntryButtons:The<>buttonsselectoptionsfromthemenu

currentlybeingdisplayedontheVFDscreen.Theselectedoptionblinks.

Whentheselectedoptionincludesamodifiableitem,the∆∇arrowbuttons

canbeusedtoincrementordecrementthatmodifiableitem.

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4 Operation

Model 2010B

The EnterbuttonisusedtoacceptanynewentriesontheVFDscreen.

The EscapebuttonisusedtoabortanynewentriesontheVFDscreenthatare

not yet accepted by use of the Enterbutton.

Figure4-1showsthehierarchyoffunctionsavailabletotheoperatorviathe

functionbuttons.Thesixfunctionbuttonsontheanalyzerare:

• Analyze. This is the normal operating mode. The analyzer

monitors the thermal conductivity of the sample, displays the

percent or parts-per-million of target gas or contamination, and

warns of any alarm conditions.

• System. The system function consists of nine subfunctions.

Four of these are for ordinary setup and operation:

•

Setup an Auto-Cal

Assign Passwords

Log out to secure system

InitiateaSelf-Test

Three of the subfunctions do auxiliary tasks:

•

Checking model and software version

Displaymoresubfunctions

Two of these are for programming/reprogramming the analyzer:

•

Define gas applications and ranges (Refer to programming

section, or contact factory.)

•

Use the Curve Algorithm to linearize output. (Refer to

programmingsection, orcontactfactory.)

• Zero. Used to set up a zero calibration.

• Span. Used to set up a span calibration.

• Alarms. Used to set the alarm setpoints and determine whether

each alarm will be active or defeated, HI or LO acting, latching,

and/orfail-safe.

• Range. Used to set up three analysis ranges that can be

switched automatically with autoranging or used as individual

fixedranges.

Anyfunctioncanbeselectedatanytimebypressingtheappropriatebutton

(unlesspasswordrestrictionsapply).Theorderaspresentedinthismanualis

appropriateforaninitialsetup.

Eachofthesefunctionsisdescribedingreaterdetailinthefollowingproce-

dures.TheVFDscreentextthataccompanieseachoperationisreproduced,at

theappropriatepointintheprocedure,inaMonospacedtypestyle.Push-

buttonnamesareprintedinObliquetype.

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Thermal Conductivity Analyzer

Part I: Control Unit

System

Set LCD

CONTRAST

Contrast Function is DISABLED

Contrast

(Refer to Section 1.6)

Span/Zero

Off/On

Span/Zero

Timing

Span/Zero

Off/On

AUTO-CAL

PASSWORD

LOGOUT

Enter

Password

Change Yes

Yes/No

Change

Password

Verify

Password

Secure Sys &

Analyze Only

Show Model

and Version

MODEL

Select

Range

Define

Appl/Range

APPLICATION

SELF-TEST

Self-Test in

Progress

Slef-Test

Results

Verify

Points

Ver

Enter

Input/Output

Values

Gas Use

Range

Select

Verify/Setup

Select

Range

Man

ALGORITHM

Enter

Auto/Manual

Linearity Cal

Set

Select Linrty

Span Values

Auto

Zero in

Progress

Auto/Manual

Zero Select

Zero

Auto/Manual

Span Select

Span Value

Set

Span in

Progress

Span

Select

Range

Gas Use

Range

% / ppm

Select

Setpoints &

Attributes

Alarms

Man

Define

Range

Select

Range

Auto/Manual

Range Adj

Range

Gas

Application

Auto

Analyze

Sample

Analyze

Figure 4-1: Hierarchy of Functions and Subfunctions

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4 Operation

Model 2010B

4.3 The System Function

ThesubfunctionsoftheSystemfunctionaredescribedbelow.Specific

proceduresfortheirusefollowthedescriptions:

•

AUTO-CAL: Used to define an automatic calibration sequence

and/or start an AUTO-CAL.

PWD: Security can be established by choosing a 3 digit

password (PWD) from the standard ASCII character set. Once a

unique password is assigned and activated, the operator MUST

enter the UNIQUE password to gain access to setup functions

which alter the instrument's operation.

•

LOGOUT: Logging out prevents an unauthorized tampering

withanalyzersettings.

MORE: Select and enter MORE to get a new screen with

additionalsubfunctionslisted.

MODEL: Displays Manufacturer, Model, and Software Version

ofinstrument.

APPLICATION: A restricted function, not generally accessed by

theenduser.Usedtodefineuptothreeanalysisrangesanda

calibrationrange(includingimpurity,background,lowendofrange,

highendofrange,and%orppmunits).

•

SELF-TEST: The instrument performs a self-diagnostic test to

check the integrity of the power supply, output boards, sensor

cell,andpreamplifiers.

ALGORITHM: A restricted function, not generally accessed by the

end user. Used to linearize the output for the range of interest.

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Thermal Conductivity Analyzer

Part I: Control Unit

4.3.1 Setting the Display

ContrastFunctionisDISABLED

(Refer to Section 1.6)

IfyoucannotreadanythingontheVFDafterfirstpoweringup:

1. ObserveLEDreadout.

a. If LED meter reads 8.8.8.8.8., go to step 3.

b. If LED meter displays anything else, go to step 2.

2. Press I/O button twice to turn Analyzer OFF and ON again. LED

meter should now read 8.8.8.8.8.. Go to step 3.

4.3.2 Setting up an AUTO-CAL

Whenproperautomaticvalvingisconnected(seechapter3,installation),

theAnalyzercancycleitselfthroughasequenceofstepsthatautomaticallyzero

andspantheinstrument.

Note: Before setting up an AUTO-CAL, be sure you understand the

Zero and Span functions as described in section 4.4, and

follow the precautions given there.

Note: If you require highly accurate AUTO-CAL timing, use external

AUTO-CAL control where possible. The internal clock in the

Model 2010B is accurate to 2-3 %. Accordingly, internally

scheduled calibrations can vary 2-3 % per day.

Note: If all your ranges are for the same gas application, then AUTO-

CAL will calibrate whichever range you are in at the scheduled

time for automatic calibration.

Note: If your ranges are configured for different applications, then

AUTO-CAL will calibrate all of the ranges simultaneously (by

calibrating the Cal Range).

To setup an Auto–Cal cycle:

ChooseSystemfromtheFunctionbuttons.TheVFD willdisplayfive

subfunctions.

CONTRAST AUTO—CAL

PWD LOGOUT MORE

Contrast Function is DISABLED

(Refer to Section 1.6)

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4 Operation

Model 2010B

Use < > arrows to blink AUTO—CAL, and press Enter. A new screen for

ZERO/SPAN set appears.

ZERO in Ød Øh off

SPANin Ød Øhoff

Press < > arrows to blink ZERO(or SPAN), then press Enter again.

(You won’t be able to set OFF to ON if a zero interval is entered.) A Span

Every ... (or Zero Every ...) screen appears.

Zeroschedule:OFF

Day: ØdHour: Øh

Use ∆∇arrows to set an interval value, then use < >arrowstomovetothe

start-timevalue.Use∆∇arrowstosetastart-timevalue.

To turn ON the SPAN and/or ZERO cycles (to activate AUTO–CAL):

Press System again, choose AUTO–CAL, and press Enter again. When the

ZERO/SPAN values screen appears, use the < > arrows to blink the ZERO

(or SPAN) and press Enter to go to the next screen. Use < > to select OFF/

ONfield. Use ∆∇ arrows to set the OFF/ONfield to ON. You can now turn

thesefieldsONbecausethereisanonzerospanintervaldefined.

4.3.3 Password Protection

Beforeauniquepasswordisassigned,thesystemassignsTAIbydefault.

Thispasswordwillbedisplayedautomatically.Theoperatorjustpressesthe

Enterkeytobeallowedtotalaccesstotheinstrument’sfeatures.

Ifapasswordisassigned,thensettingthefollowingsystemparameterscan

bedoneonlyafterthepasswordisentered:alarmsetpoints,assigninganew

password,range/applicationselections,andcurvealgorithmlinearization.

(APPLICATIONandALGORITHMarecoveredintheprogrammingsection.)

However,theinstrumentcanstillbeusedforanalysisorforinitiatingaself-test

withoutenteringthepassword.Todefeatsecuritythepasswordmustbe

changed back to TAI.

NOTE: If you use password security, it is advisable to keep a copy of

the password in a separate, safe location.

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Thermal Conductivity Analyzer

Part I: Control Unit

4.3.3.1

EnteringthePassword

Toinstallanewpasswordorchangeapreviouslyinstalledpassword,you

mustkeyinandENTERtheoldpasswordfirst.Ifthedefaultpasswordisin

effect, pressingtheENTERbuttonwillenterthedefaultTAIpasswordforyou.

Press System to enter the System mode.

ContrastFunctionisDISABLED

CONTRAST AUTO—CAL

PWD LOGOUT MORE

(Refer to Section 1.6)

Use the < > arrow keys to scroll the blinking over to PWD, and press

Enterto select the password function. Either the default TAI password or AAA

placeholdersforanexistingpasswordwillappearonscreendependingon

whetherornotapasswordhasbeenpreviouslyinstalled.

Enterpassword:

TAI

Enterpassword:

AAA

Thescreenpromptsyoutoenterthecurrentpassword.Ifyouarenotusing

password protection, press Enter to accept TAI as the default password. If a

passwordhasbeenpreviouslyinstalled,enterthepasswordusingthe<>arrow

keystoscrollbackandforthbetweenletters, andthe∆∇arrowkeystochange

the letters to the proper password. Press Enter to enter the password.

Inafewseconds,youwillbegiventheopportunitytochangethispass-

word or keep it and go on.

ChangePassword?

<ENT>=Yes <ESC>=No

Press Escape to move on, or proceed as in Changing the Password,

below.

4.3.3.2

InstallingorChangingthePassword

Ifyouwanttoinstallapassword,orchangeanexistingpassword,proceed

asaboveinEnteringthePassword. Whenyouaregiventheopportunityto

changethepassword:

ChangePassword?

<ENT>=Yes <ESC>=No

PressEntertochange the password(eitherthe defaultTAI or the previ-

ouslyassignedpassword),orpressEscapetokeeptheexistingpasswordand

moveon.

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4 Operation

Model 2010B

IfyouchoseEntertochangethepassword,thepasswordassignment

screenappears.

Selectnewpassword

TAI

Enter the password using the < > arrowkeys tomove backand forth

betweentheexistingpasswordletters,andthe∆∇arrowkeystochangethe

letterstothenewpassword.Thefullsetof94charactersavailableforpassword

useareshowninthetablebelow.

Characters Available for Password Definition:

}

)

→

[

]

{

;

(

Whenyouhavefinishedtypingthenewpassword,pressEnter.Averifica-

tionscreenappears.Thescreenwillpromptyoutoretypeyourpasswordfor

verification.

EnterPWDToVerify:

AAA

Use the arrow keys to retype your password and press Enter when

finished.Yourpasswordwillbestoredinthemicroprocessorandthesystemwill

immediatelyswitchtotheAnalyzescreen,andyounowhaveaccesstoall

instrumentfunctions.

Ifallalarmsaredefeated, theAnalyzescreenappearsas:

1.95 %H2inN2

nR1: Ø—1ØAnlz

Ifanalarmistripped,thesecondlinewillchangetoshowwhichalarmitis:

1.95 %H2inN2

AL—1

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Thermal Conductivity Analyzer

Part I: Control Unit

NOTE:If you log off the system using the LOGOUT function in the

system menu, you will now be required to re-enter the pass-

word to gain access to Alarm, and Range functions.

4.3.4 Logging Out

TheLOGOUTfunction providesaconvenientmeansofleavingtheanalyzer

inapasswordprotectedmodewithouthavingtoshuttheinstrumentoff.By

enteringLOGOUT,youeffectivelylogofftheinstrumentleavingthesystem

protectedagainstuseuntilthepasswordisreentered.Tologout,pressthe

SystembuttontoentertheSystemfunction.

CONTRAST AUTO—CAL

PWD LOGOUT MORE

ContrastFunctionisDISABLED

(Refer to Section 1.6)

Use the < > arrow keys to position the blinking over the LOGOUT func-

tion,andpressEntertoLogout.Thescreenwilldisplaythemessage:

Protecteduntil

passwordentered

4.3.5 System Self-Diagnostic Test

TheModel2010Bhasabuilt-inself-diagnostictestingroutine.Pre-pro-

grammedsignalsaresentthroughthepowersupply,outputboard,preamp

boardandsensorcircuit.Thereturnsignalisanalyzed,andattheendofthetest

thestatusofeachfunctionisdisplayedonthescreen, eitherasOK orasa

number between 1 and 1024. (See System Self Diagnostic Test in chapter 5

fornumbercode.)Ifanyofthefunctionsfails,theSystemAlarmistripped.

Note: The sensor will always show failed unless identical gas is

present in both channels at the time of the SELF-TEST.

Theselfdiagnosticsarerunautomaticallybytheanalyzerwheneverthe

instrumentisturnedon,butthetestcanalsoberunbytheoperatoratwill.To

initiateaselfdiagnostictestduringoperation:

PresstheSystembuttontostarttheSystemfunction.

CONTRAST AUTO—CAL

PWD LOGOUT MORE

Contrast Function is DISABLED

(Refer to Section 1.6)

Use the < > arrow keys to blink MORE, then press Enter.

MODEL APPLICATION

SELF—TEST ALGORITHM

Use the < > arrow keys again to move the blinking to the SELF–TEST

andpressEnter.Thescreenwillfollowtherunningofthediagnostic.

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4 Operation

Model 2010B

RUNNING DIAGNOSTIC

TestingPreamp—Cell

Whenthetestingiscomplete,theresultsaredisplayed.

Power:OK Analog:OK

Cell: 2 Preamp:3

ThemoduleisfunctioningproperlyifitisfollowedbyOK.Anumber

indicatesaprobleminaspecificareaoftheinstrument.RefertoChapter5

MaintenanceandTroubleshootingfornumber-codeinformation.Theresults

screenalternatesforatimewith:

PressAnyKey

ToContinue...

ThentheanalyzerreturnstotheinitialSystemscreen.

4.3.6 The Model Screen

Move the < > arrow key to MORE and press Enter. With MODEL

blinking,pressEnter.Thescreendisplaysthemanufacturer,model,andsoft-

wareversioninformation.

4.3.7 Checking Linearity with ALGORITHM

From the System Function screen, select ALGORITHM, and press

Enter.

selrngtosetalgo:

—> Ø1 Ø2 Ø3 <—

Use the < > keys to select the range: 01, 02, or 03. Then press Enter.

Gas Use: H2 — N2

Range:

— 10%

PressEnteragain.

Algorithmsetup:

VERIFY SETUP

Select and EnterVERIFY to check whether the linearization has been

accomplishedsatisfactorily.

Dpt INPUT OUTPUT

Ø Ø.ØØ Ø.ØØ

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Thermal Conductivity Analyzer

Part I: Control Unit

Theleftmostdigit(underDpt)isthenumberofthedatapointbeingmoni-

tored.Usethe∆∇keystoselectthesuccessivepoints.

TheINPUTvalueistheinputtothelinearizer.Itisthesimulatedoutputof

theanalyzer.Youdonotneedtoactuallyflowgas.

The OUTPUT value is the output of the linearizer. It should be the ACTU-

ALconcentrationofthespangasbeingsimulated.

IftheOUTPUTvalueshownisnotcorrect,thelinearizationmustbe

corrected. PressESCAPEtoreturntothepreviousscreen. SelectandEnter

SET UP to Calibration Mode screen.

Selectalgorithm

mode : AUTO

There are two ways to linearize: AUTO and MANUAL: The auto mode

requiresasmanycalibrationgasesastherewillbecorrectionpointsalongthe

curve.Theuserdecidesonthenumberofpoints,basedontheprecisionre-

quired.

Themanualmodeonlyrequiresenteringthevaluesforeachcorrection

pointintothemicroprocessorviathefrontpanelbuttons.Again,thenumberof

pointsrequiredisdeterminedbytheuser.

4.4 The Zero and Span Functions

(1)TheModel2010Bcanhaveasmanyasthreeanalysisrangesplusa

specialcalibrationrange(CalRange);andtheanalysisranges,ifmorethanone,

maybeprogrammedforseparateoridenticalgasapplications.

(2)Ifallrangesareforthesameapplication,thenyouwillnotneedtheCal

Range.Calibratinganyoneoftherangeswillautomaticallycalibratetheothers.

(3)If:a)eachrangeisprogrammedforadifferentgasapplication,b)your

sensorcalibrationhasdriftedlessthan10 %,andc)yourCalRangewascali-

bratedalongwithyourotherrangeswhenlastcalibrated,thenyoucanusethe

CalRangetocalibrateallapplicationsrangesatonce.

IfyourModel2010Banalyzerfitstheparagraph(3)description,above,

usetheCalRange.Ifyouranalyzerhasdriftedmorethan10 %,calibrateeach

rangeindividually.

CAUTION: Always allow 4-5 hours warm-up time before calibrat-

ing, if your analyzer has been disconnected from its

power source. This does not apply if the analyzer

was plugged in but was in STANDBY.

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4 Operation

Model 2010B

Theanalyzeriscalibratedusingreference,zero,andspangases.Gas

requirementsarecoveredindetailinchapter3,section3.4GasConnections.

Checkthatcalibrationgasesareconnectedtotheanalyzeraccordingtothe

instructionsinsection3.4,observingalltheprescribedprecautions.

Note: Shut off the gas pressure before connecting it to the analyzer,

and be sure to limit pressure to 40 psig or less when turning it

back on.

Readjustthegaspressureintotheanalyzeruntiltheflowratethroughthe

sensorsettlesbetween50to200cc/min(approximately0.1to0.4scfh).

Note: Always keep the zero calibration gases flow as close to the

flowrate of sample gas as possible

4.4.1 Zero Cal

TheZerobuttononthefrontpanelisusedtoenterthezerocalibration

function.Zerocalibrationcanbeperformedineithertheautomaticormanual

mode.

CAUTION: If you are zeroing the Cal Range by itself (multiple

application analyzers only), use manual mode

zeroing.

If you want to calibrate ALL of the ranges at once

(multiple application analyzers only), use auto mode

zeroing in the Cal Range.

Make sure the zero gas is flowing to the instrument. If you get a CELL

CANNOT BE BALANCED message while zeroing skip to section 4.4.1.3.

4.4.1.1

AutoModeZeroing

Observe the precautions in sections 4.4 and 4.4.1, above. PressZeroto

enterthezerofunctionmode.Thescreenallowsyoutoselectwhetherthezero

calibrationistobeperformedautomaticallyormanually. Usethe∆∇arrow

keys to toggle between AUTO and MAN zero settling. Stop when AUTO

appears,blinking,onthedisplay.

Selectzero

mode: AUTO

PressEntertobeginzeroing.

####.##% H2 — N2

Slope=#.### C—Zero

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Thermal Conductivity Analyzer

Part I: Control Unit

Thebeginningzerolevelisshownintheupperleftcornerofthedisplay.As

thezeroreadingsettles,thescreendisplaysandupdatesinformationonSlope=

inpercent/second(unlesstheSlopestartswithintheacceptablezerorangeand

doesnotneedtosettlefurther).Thesystemfirstdoesacoursezero,shownin

thelowerrightcornerofthescreenasC—Zero, for3 min, andthendoesafine

zero,anddisplaysF—Zero,for3 min.

Then,andwheneverSlopeislessthan0.01foratleast3min,insteadof

Slope you will see a countdown: 9 Left, 8 Left, and so fourth. These are

softwarestepsinthezeroingprocessthatthesystemmustcomplete,AFTER

settling, before it can go back toAnalyze. Software zero is indicated by S–

Zero in the lower right corner.

####.## % H2—N2

4Left=#.### S—Zero

Thezeroingprocesswillautomaticallyconcludewhentheoutputiswithin

theacceptablerangeforagoodzero.Thentheanalyzerautomaticallyreturnsto

the Analyze mode.

4.4.1.2

ManualModeZeroing

PressZerotoentertheZerofunction.Thescreenthatappearsallowsyou

toselectbetweenautomaticormanualzerocalibration.Usethe∆∇keysto

toggle between AUTO and MAN zero settling. Stop when MANUAL appears,

blinking,onthedisplay.

Selectzero

mode: MANUAL

PressEntertobeginthezerocalibration.Afterafewsecondsthefirstof

threezeroingscreensappears.Thenumberintheupperlefthandcorneristhe

first-stagezerooffset.Themicroprocessorsamplestheoutputatapredeter-

minedrate.

####.## % H2—N2

Zeroadj:2048C—Zero

TheanalyzergoesthroughC–Zero,F–Zero,andS–Zero.DuringC–Zero

and F–Zero, use the ∆∇ keys to adjust displayed Zero adj: value as close as

possibletozero.Then,pressEnter.

S–Zerostarts.DuringS–Zero,theMicrocontrollertakescontrolasinAuto

ModeZeroing,above.Itcalculatesthedifferencesbetweensuccessivesam-

plingsanddisplaystherateofchangeasSlope= avalueinpartspermillionper

second(ppm/s).

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4 Operation

Model 2010B

####.## % H2 — N2

Slope=#.### S—Zero

Generally, you have a good zero when Slope is less than 0.05 ppm/s for

about30seconds.

Oncezerosettlingcompletes,theinformationisstoredintheanalyzer’s

memory,andtheinstrumentautomaticallyreturnstotheAnalyzemode.

4.4.1.3 Cell Failure

Cellfailureinthe2010Bisusuallyassociatedwithinabilitytozerothe

instrumentwithareasonablevoltagedifferentialacrosstheWheatstonebridge.If

thisshouldeverhappen,the2010Bsystemalarmtrips,andtheVFDdisplaysa

failuremessage.

Cellcannotbebalanced

Checkyourzerogas

Beforereplacingthesensor:

a. Check your zero gas to make sure it is within specifications.

b. Check for leaks downstream from the sensor, where contamina-

tion may be leaking into the system.

c. Check flowmeter to ensure that the flow is no more than

200SCCM

d. Checktemperaturecontrollerboard.

e. Check gas temperature.

Ifnoneoftheaboveasindicated, thesensormayneedtobereplaced.

Checkwarranty,andcontactAnalyticalInstrumentsCustomerService.

4.4.2 Span Cal

TheSpanbuttononthefrontpanelisusedtospancalibratetheanalyzer.

Spancalibrationcanbeperformedineithertheautomaticormanualmode.

CAUTION: If you are spanning the Cal Range by itself (multiple

application analyzers only), use manual mode

zeroing.

If you want to calibrate ALL of the ranges at once

(multiple application analyzers only), use auto mode

spanning in the Cal Range.

Makesurethespangasisflowingtotheinstrument.

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Thermal Conductivity Analyzer

Part I: Control Unit

4.4.2.1

AutoModeSpanning

Observeallprecautionsinsections4.4and4.4.2, above. PressSpanto

enterthespanfunction.Thescreenthatappearsallowsyoutoselectwhetherthe

spancalibrationistobeperformedautomaticallyormanually. Usethe∆∇

arrow keys to toggle between AUTO and MAN span settling. Stop when

AUTO appears, blinking, onthedisplay.

Selectspan

mode: AUTO

PressEnterto move to the next screen.

SpanVal: 2Ø.ØØ%

<ENT>Tobeginspan

Usethe<>arrowkeystotogglebetweenthespanconcentrationvalue

andtheunitsfield(%/ppm).Usethe∆∇ arrowkeyschangethevalueand/orthe

units,asnecessary.Whenyouhavesettheconcentrationofthespangasyouare

using,pressEntertobegintheSpancalibration.

####.##% H2 — N2

Slope=#.### Span

Thebeginningspanvalueisshownintheupperleftcornerofthedisplay.

Asthespanreadingsettles,thescreendisplaysandupdatesinformationon

Slope.Spanningautomaticallyendswhenthespanoutputcorresponds,within

tolerance,tothevalueofthespangasconcentration.Thentheinstrumentauto-

maticallyreturnstotheanalyzemode.

4.4.2.2

ManualModeSpanning

PressSpantostarttheSpanfunction.Thescreenthatappearsallows

youtoselectwhetherthespancalibrationistobeperformedautomaticallyor

manually.

Selectspan

mode: MANUAL

Use the ∆∇ keys to toggle between AUTO and MAN span settling. Stop

when MAN appears, blinking, on the display. Press Enterto move to the next

screen.

SpanVal: 2Ø.ØØ%

<ENT>Tobeginspan

Usethe<>arrowkeystotogglebetweenthespanconcentrationvalue

andtheunitsfield(%/ppm).Usethe∆∇ arrowkeyschangethevalueand/orthe

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4 Operation

Model 2010B

units,asnecessary.Whenyouhavesettheconcentrationofthespangasyouare

using,pressEntertobegintheSpancalibration.

PressEntertoenterthespanvalueintothesystemandbeginthespan

calibration.

Oncethespanhasbegun,themicroprocessorsamplestheoutputata

predeterminedrate.Itcalculatesthedifferencebetweensuccessivesamplings

anddisplaysthisdifferenceasSlopeonthescreen.Ittakesseveralsecondsfor

thefirstSlopevaluetodisplay.SlopeindicatesrateofchangeoftheSpan

reading.Itisasensitiveindicatorofstability.

####.##% H2—N2

Slope=#.### Span

WhentheSpanvaluedisplayedonthescreenissufficientlystable,press

Enter.(Generally,whentheSpanreadingchangesby1 %orlessoftherange

beingcalibratedforaperiodoftenminutesitissufficientlystable.)OnceEnter

ispressed,theSpanreadingchangestothecorrectvalue.Theinstrumentthen

automaticallyenterstheAnalyzefunction.

4.5 The Alarms Function

TheModel2010Bisequippedwith6fullyadjustablesetpointsconcentra-

tionwithtwoalarmsandasystemfailurealarmrelay.Eachalarmrelayhasaset

ofform“C"contactsratedfor3amperesresistiveloadat250V ac.SeeFigure

inChapter3,Installationand/ortheInterconnectionDiagramincludedatthe

backofthismanualforrelayterminalconnections.

Thesystemfailurealarmhasafixedconfigurationdescribedinchapter3

Installation.

Theconcentrationalarmscanbeconfiguredfromthefrontpanelaseither

high or low alarms by the operator. The alarm modes can be set as latching or

non-latching, and either failsafe or non-failsafe, or, they can be defeated

altogether.Thesetpointsforthealarmsarealsoestablishedusingthisfunction.

Decidehowyouralarmsshouldbeconfigured.Thechoicewilldepend

uponyourprocess.Considerthefollowingfourpoints:

1. Which if any of the alarms are to be high alarms and which if any

are to be low alarms?

Setting an alarm as HIGH triggers the alarm when the

contaminant concentration rises above the setpoint. Setting an

alarm as LOW triggers the alarm when the contaminant

concentration falls below the setpoint.

Decide whether you want the alarms to be set as:

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Thermal Conductivity Analyzer

Part I: Control Unit

•

Both high (high and high-high) alarms, or

One high and one low alarm, or

Both low (low and low-low) alarms.

2. Are either or both of the alarms to be configured as failsafe?

In failsafe mode, the alarm relay de-energizes in an alarm

condition. For non-failsafe operation, the relay is energized in an

alarm condition. You can set either or both of the concentration

alarms to operate in failsafe or non-failsafe mode.

3. Are either of the alarms to be latching?

In latching mode, once the alarm or alarms trigger, they will

remain in the alarm mode even if process conditions revert back

to non-alarm conditions. This mode requires an alarm to be

recognized before it can be reset. In the non-latching mode, the

alarm status will terminate when process conditions revert to non-

alarmconditions.

4. Are either of the alarms to be defeated?

The defeat alarm mode is incorporated into the alarm circuit so

that maintenance can be performed under conditions which

would normally activate the alarms.

The defeat function can also be used to reset a latched alarm.

(See procedures, below.)

Ifyouareusingpasswordprotection,youwillneedtoenteryourpassword

toaccessthealarmfunctions.Followtheinstructionsinsection4.3.3toenter

yourpassword.Onceyouhaveclearancetoproceed,entertheAlarmfunction.

Note: If all ranges are for the same application, setting one of them

will automaticaly set the others.

PresstheAlarmbuttononthefrontpaneltoentertheAlarmfunction.

Makesurethat01isblinking.

Selrngtosetalm:

—> Ø1 Ø2 Ø3 <—

SetuptheRange1alarmbymovingtheblinkingoverto01usingthe<>

arrowkeys.ThenpressEnter.Checkthegasapplicationandrangelimitsas

displayedonthescreen.

Gas use: H2 — N2

Range: 0— 10%

Pressenteragaintosetthealarmsetpoints.

Sel%/ppmalmtoset

AL1—PPM AL2—PPM

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4 Operation

Model 2010B

Use the ∆∇ keys to choose between % or ppm units. Then press Enter to

movetothenextscreen.

AL1: 1ØØØ ppm HI

Dft:N Fs:N Ltch:N

Fiveparameterscanbechangedonthisscreen:

•

Value of the alarm setpoint, AL1: ####

Out-of-range direction, HI or LO

Defeated? Dft:Y/N (Yes/No)

Failsafe? Fs:Y/N (Yes/No)

Latching? Ltch:Y/N (Yes/No).

•

To define the setpoint, use the < > arrow keys to move the

blinking over to AL1: ####. Then use the ∆∇ arrow keys to

change the number. Holding down the key speeds up the

incrementingordecrementing.

To set the other parameters use the < > arrow keys to move the

blinking over to the desired parameter. Then use the ∆∇ arrow

keys to change the parameter.

•

Once the parameters for alarm 1 have been set, press Alarms

again, and repeat this procedure for alarm 2 (AL2).

To reset a latched alarm, go to Dft– and then press either ∆ two

times or ∇ two times. (Toggle it to Y and then back to N.)

–OR –

Go to Ltch– and then press either ∆ two times or ∇ two times.

(Toggle it to N and back to Y.)

4.6 The Range Select Function

TheRangefunctionallowsyoutomanuallyselecttheconcentration range

of analysis (MANUAL), or to select automatic range switching (AUTO).

In the MANUAL screen, you are further allowed to define the high and low

(concentration)limitsofeachRange,andselectasingle,fixedrangetorun.

CAUTION: If this is a linearized application, the new range must

be within the limits previously programmed using the

System function, if linearization is to apply through-

out the range. Furthermore, if the limits are too small

a part (approx 10 % or less) of the originally linear-

ized range, the linearization will be compromised.

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Thermal Conductivity Analyzer

Part I: Control Unit

IntheAUTOscreen,youarefurtherallowedtoselectwhichgasapplication

(PREVIOUSLYdefinedinSystemfunction)torun.

4.6.1 Manual (Select/Define Range) Screen

TheManualrange-switchingmodeallowsyoutoselectasingle,fixed

analysisrange.Itthenallowsyoutoredefinetheupperandlowerlimits,forthe

range.

PressRangekeytostarttheRangefunction.

Selectrange

mode: MANUAL

Note: If all three ranges are currently defined for different applica-

tion gases, then the above screen does not display (because

mode must be manual). Instead, the VFD goes directly to the

following screen.

If above screen displays, use the ∆∇ arrow keys to Select MANUAL, and

pressEnter.

Selectrangetorun

—> Ø1 Ø2 Ø3 CAL<—

Use the < > keys to select the range: 01, 02, 03, or CAL. Then press

Enter.

Gasuse: H2—N2

Range: Ø — 10 %

Usethe <> keystotogglebetweentheRange:low-endfieldandthe

Range:high-endfield.Usethe∆∇ keystochangethevaluesofthefields.

PressEscapetoreturntothepreviousscreentoselectordefineanother

range.

PressEntertoreturnthetotheAnalyzefunction.

4.6.2 Auto (Single Application) Screen

Autorangingwillautomaticalysettotheapplicationthathasatleasttwo

rangesetupwiththesamegases.

Intheautorangingmode,themicroprocessorautomaticallyrespondsto

concentrationchangesbyswitchingrangesforoptimumreadoutsensitivity.Ifthe

upperlimitoftheoperatingrangeisreached,theinstrumentautomaticallyshifts

tothenexthigherrange.Iftheconcentrationfallstobelow85%offullscaleof

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4 Operation

Model 2010B

thenextlowerrange,theinstrumentswitchestothelowerrange.Acorrespond-

ingshiftintheDCconcentrationoutput,andintherangeIDoutputs,willbe

noticed.

Theautorangingfeaturecanbeoverriddensothatanalogoutputstays ona

fixedrangeregardlessofthecontaminantconcentrationdetected.Iftheconcen-

trationexceedstheupperlimitoftherange,theDCoutputwillsaturateat1V dc

(20mAatthecurrentoutput).

However,thedigitalreadoutandtheRS-232outputoftheconcentration

areunaffectedbythefixedrange.Theycontinuetoreadbeyondthefull-scale

settinguntilamplifiersaturationisreached.Belowamplifiersaturation,the

overrangereadingsareaccurateUNLESStheapplicationuseslinearizationover

theselectedrange.

TheconcentrationrangescanberedefinedusingtheRangefunction

Manualscreen,andtheapplicationgasescanberedefinedusingtheSystem

function,iftheyarenotalreadydefinedasnecessary.

CAUTION: Redefining applications or ranges might require

relinearizationand/orrecalibration.

Tosetupautomaticranging:

PressRangekeytostarttheRangefunction.

Selectrange

mode : AUTO

Note: If all three ranges are currently defined for different applica-

tion gases, then the above screen does not display (because

mode must be manual).

If above screen displays, use the ∆∇ arrow keys to Select AUTO, and

press Enter.

PressEscapetoreturntothepreviousAnalyzeFunction.

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Thermal Conductivity Analyzer

4.6.3 Precautions

Part I: Control Unit

TheModel2010Ballowsagreatdealofflexibilityinchoosingrangesfor

automaticrangeswitching.However,therearesomepitfallsthataretobe

avoided.

Rangesthatworkwelltogetherare:

•

Ranges that have the same lower limits but upper limits that differ

by approximately an order of magnitude

Ranges whose upper limits coincide with the lower limits of the

next higher range

Ranges where there is a gap between the upper limit of the range

and the lower limit of the next higher range.

Rangeschemesthataretobeavoidedinclude:

•

Ranges that overlap

Ranges whose limits are entirely within the span of an adjoining

range.

Figure4-2illustratestheseschemesgraphically.

Figure 4-2: Examples of Autoranging Schemes

4.7 The Analyze Function

Normally,allofthefunctionsautomaticallyswitchbacktotheAnalyze

functionwhentheyhavecompletedtheirassignedoperations.Pressingthe

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4 Operation

Model 2010B

EscapebuttoninmanycasesalsoswitchestheanalyzerbacktotheAnalyze

function.Alternatively,youcanpresstheAnalyzebuttonatanytimetoreturn

toanalyzingyoursample.

TheAnalyzefunctionscreenshowstheimpurityconcentrationandthe

applicationgasesinthefirstline,andtherangeinthesecondline.Inthelower

rightcorner,theabbreviationAnlzindicatesthattheanalyzerisintheAnalyze

mode.Ifthereisan*beforetheAnlz,itindicatesthattherangeislinearized.

1.95 % H2 —N2

nR1:Ø—10 *Anlz

nindicatesnoninvertingrange

iindicatesinvertingrange

Iftheconcentrationdetectedisoverrange,thefirstlineofthedisplayblinks

continuously.

4.8 Programming

CAUTION: The programming functions of the Set Range and

Curve Algorithm screens are configured at the facto-

ry to the users application specification. These func-

tions should only be reprogrammed by trained,

qualified personnel.

Toprogram,youmust:

1. Enter the password, if you are using the analyzer’s password

protectioncapability.

2. Connect a computer or computer terminal capable of sending an

RS-232 signal to the analyzer RS-232 connector. (See chapter 3

Installation for details). Send the rp command to the analyzer.

For software 1.1.4 or later, turn the instrument off and back on.

While on the introduction screen hold the Analyze key for at least

fifteen seconds. Press the Enter key twice to return to the

Analyze mode.

3. Press the System button to start the System function.

CONTRAST AUTO—CAL

PWD LOGOUT MORE

ContrastFunctionisDISABLED

(Refer to Section 1.6)

Use the < > arrow keys to blink MORE, then press Enter.

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Thermal Conductivity Analyzer

Part I: Control Unit

MODEL APPLICATION

SELF_TEST ALGORITHM

NowyouwillbeabletoselecttheAPPLICATIONandALGORITHM

set-upfunctions.

4.8.1 The Set Range Screen

TheSetRangescreenallowsreprogrammingofthethreeanalysisranges

andthecalibrationrange(includingimpuritygas,backgroundgas,lowendof

range,highendofrange,and%orppmunits).Originalprogrammingisusually

doneatthefactoryaccordingtothecustomer’sapplication.Itmustbedone

throughtheRS-232portusingacomputerrunningaterminalemulationprogram.

Note: It is important to distinguish between this System programming

subfunction and the Range button function, which is an operator

control. The Set Range Screen of the System function allows the user

to DEFINE the upper and lower limits of a range AND the application

of the range. The Range button function only allows the user to

select or define the limits, or to select the application, but not

to define the application.

NormallytheModel2010Bisfactorysettodefaulttomanualrange

selection,unlessitisorderedasasingle-applicationmultiple-rangeunit(inwhich

caseitdefaultstoautoranging).Ineithercase,autorangingormanualrange

selectioncanbeprogrammedbytheuser.

Intheautorangingmode,themicroprocessorautomaticallyrespondsto

concentrationchangesbyswitchingrangesforoptimumreadoutsensitivity.Ifthe

upperlimitoftheoperatingrangeisreached,theinstrumentautomaticallyshifts

tothenexthigherrange.Iftheconcentrationfallstobelow85%offullscaleof

thenextlowerrange,theinstrumentswitchestothelowerrange.Acorrespond-

ingshiftintheDCconcentrationoutput,andintherangeIDoutputs,willbe

noticed.

Theautorangingfeaturecanbeoverriddensothatanalogoutputstays ona

fixedrangeregardlessofthecontaminantconcentrationdetected.Iftheconcen-

trationexceedstheupperlimitoftherange,theDCoutputwillsaturateat1V dc

(20mAatthecurrentoutput).

However,thedigitalreadoutandtheRS-232outputoftheconcentration

areunaffectedbythefixedrange.Theycontinuetoreadbeyondthefull-scale

settinguntilamplifiersaturationisreached.Belowamplifiersaturation,the

overrangereadingsareaccurateUNLESStheapplicationuseslinearizationover

theselectedrange.

Toprogramtheranges,youmustfirstperformthefourstepsindicatedat

thebeginningofsection4.8Programming.Youwillthenbeinthesecond

Systemmenuscreen.

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4 Operation

Model 2010B

MODEL APPLICATION

SELF_TEST ALGORITHM

Use the < > arrow keys again to move the blinking to APPLICATION

and press Enter.

Selrngtosetappl:

—> Ø1 Ø2 Ø3 CAL <—

Usethe∆∇arrowkeystoincrement/decrementtherangenumberto01,

02, 03, or CAL, and press Enter.

Imp: H2 Bck: N2

FR:Ø TO:1Ø %

Usethe<>arrowkeystomovetoImp:(impurity),Bck:(background),

FR:(from—lowerendofrange),TO:(to—upperendofrange),andPPMor%.

Usethe∆∇arrowkeystoincrementtherespectiveparametersasdesired.

Press Enter to accept the values and return to Analyze mode. (See note

below.)Repeatforeachrangeyouwanttoset.

Note: The ranges must be increasing from low to high, for example,

if Range 1 is set to 0–10 % and Range 2 is set to 0–100 %, then

Range 3 cannot be set to 0–50 % since that makes Range 3

lower than Range 2.

Ranges,alarms,andspansarealwayssetineitherpercentorppmunits,as

selectedbytheoperator,eventhoughallconcentration-dataoutputschange

fromppmtopercentwhentheconcentrationisabove9999 ppm.

Note: When performing analysis on a fixed range, if the concentra-

tion rises above the upper limit as established by the operator

for that particular range, the output saturates at 1 V dc (or 20

mA). However, the digital readout and the RS-232 output

continue to read regardless of the analog output range.

Toendthesession:

IfstartedwiththeRS-232,send:

st<enter>

totheanalyzerfromthecomputer.

Ifstartedthroughthefrontpanel,turntheinstrumentoffandbackon.

Press the Enter key twice to return to the Analyze mode.

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Thermal Conductivity Analyzer

Part I: Control Unit

4.8.2 The Curve Algorithm Screen

TheCurveAlgorithmisalinearizationmethod.Itprovidesfrom1to9

intermediatepointsbetweentheZEROandSPANvalues,whichcanbenormal-

izedduringcalibration,toensureastraight-lineinput/outputtransferfunction

throughtheanalyzer.

Eachrangeislinearizedindividually,asnecessary,sinceeachrangewill

usuallyhaveatotallydifferentlinearizationrequirement. Beforesettingthe

algorithmcurve,eachrangemustbeZeroedandSpanned.

Tolinearizetheranges,youmustfirstperformthefourstepsindicatedat

thebeginningofsection4.8Programming.Youwillthenbeinthesecond

Systemmenuscreen.

MODEL APPLICATION

SELF_TEST ALGORITHM

4.8.2.1 Checkingthelinearization

From the System Function screen, select ALGORITHM, and press

Enter.

Selrngsetalgo

—> Ø1 Ø2 Ø3 <—

Use the < > keys to select the range: 01, 02, or 03. Then press Enter.

Gasuse:H2 —N2

Range: Ø-10 %

PressEnteragain.

Algorithmsetup:

VERIFY SETUP

Select and EnterVERIFY to check whether the linearization has been

accomplishedsatisfactorily.

Dpt INPUT OUTPUT

Ø Ø.ØØ Ø.ØØ

Theleftmostdigit(underDpt)isthenumberofthedatapointbeingmoni-

tored.Usethe∆∇keystoselectthesuccessivepoints.

TheINPUTvalueistheinputtothelinearizer.Itisthesimulatedoutputof

theanalyzer.Youdonotneedtoactuallyflowgas.

The OUTPUT value is the output of the linearizer. It should be the ACTU-

ALconcentrationofthespangasbeingsimulated.

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4 Operation

Model 2010B

IftheOUTPUTvalueshownisnotcorrect,thelinearizationmustbecorrect-

ed. Press ESCAPE to return to the previous screen. Select and Enter SET UP

toCalibrationModescreen.

Select algorithm

mode : AUTO

There are two ways to linearize: AUTO and MANUAL: The auto mode

requiresasmanycalibrationgasesastherewillbecorrectionpointsalongthe

curve.Theuserdecidesonthenumberofpoints,basedontheprecisionre-

quired.

Themanualmodeonlyrequiresenteringthevaluesforeachcorrection

pointintothemicroprocessorviathefrontpanelbuttons.Again,thenumberof

pointsrequiredisdeterminedbytheuser.

Note: Before performing section 4.8.2 or 4.8.2.3, you must check to

ensure that your calibration gases or points are between low

end and high end of the range setup. All correction points

must be between Zero and Span concentrations. Do not enter

Zero and Span points as part of the correction.

4.8.2.2 Manual Mode Linearization

Tolinearizemanually,youmusthavepreviousknowledgeofthenonlinear

thermal-conductivitycharacteristicsofyourgases.Youenterthevalueofthe

differentialbetweentheactualconcentrationandtheapparentconcentration

(analyzeroutput).AnalyticalInstrumentshastabulardataofthistypeforalarge

numberofgases,whichitmakesavailabletocustomersonrequest.SeeAppen-

dixfororderinginformation.Toenterdata:

From the System Functions Screen—

1. Use < > to select ALGORITHM , and Enter.

2. Select and Enter SETUP.

3. Enter MANUAL from the Calibration Mode Select screen.

Dpt INPUT OUTPUT

Ø Ø.ØØ Ø.ØØ

Thedataentryscreenresemblestheverifyscreen,butthegasvaluescan

bemodifiedandthedata-pointnumbercannot. Usethe<>keystotoggle

between the INPUT and OUTPUT fields. Use the ∆∇ keys to set the value for

thelowestconcentrationintothefirstpoint.ThenpressEnter.

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Thermal Conductivity Analyzer

Part I: Control Unit

Aftereachpointisentered,thedata-pointnumberincrementstothenext

point.Movingfromthelowesttothehighestconcentration,usethe∆∇keysto

setthepropervaluesateachpoint.

Dpt INPUT

0 Ø.ØØ Ø.ØØ

OUTPUT

Repeattheaboveprocedureforeachofthedatapointsyouaresetting(up

toninepoints:0-8).Setthepointsinunitincrements.Donotskipnumbers.The

linearizerwillautomaticallyadjustforthenumberofpointsentered.

When you are done, Press ESCAPE. The message, Completed. Wait

for calculation, appears briefly, and then the main System screen returns.

Toendthesession:

IfstartedwiththeRS-232,send:

st<enter>

totheanalyzerfromthecomputer.

Ifstartedthroughthefrontpanel,turntheinstrumentoffandbackon.

Press the Enter key twice to return to the Analyze mode.

4.8.2.3 Auto Mode Linearization

TolinearizeintheAutoMode,youmusthaveonhandaseparatecalibra-

tiongasforeachofthedatapointsyouaregoinguseinyourlinearization.First,

theanalyzeriszeroedandspannedasusual.Then,eachspecialcalibrationgas,

foreachoftheintermediatecalibrationpoints,isflowed,inturn,throughthe

sensor.Aseachgasflows,thedifferentialvalueforthatintermediatecalibration

pointisenteredfromthefrontpaneloftheanalyzer.

Note: The span gas use to span the analyzer must be >90% of the

range being analyzed.

Beforestartinglinearization,performastandardcalibration.Seesection

4.4. Toenterdata:

From the System Functions screen—

1. Use < > to select ALGORITHM , and Enter.

2. Select and Enter SETUP.

3. Enter AUTO from the Calibration Mode Select screen.

TheAutoLinearizeModedataentryscreenappears.

1.95% H2 —N2

Input(Ø):2.00

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4 Operation

Model 2010B

5. Use the ∆∇ keys to set the proper value of calibration gas, and

Enter. Repeat this step for each cal-point number as it appears in

the Input (x) parentheses.

6. Repeat step 5 for each of the special calibration gases, from the

lowest to the highest concentrations. Press Escape when done.

Toendthesession:

IfstartedwiththeRS-232,send:

st<enter>

totheanalyzerfromthecomputer.

Ifstartedthroughthefrontpanel,turntheinstrumentoffandbackon.

Press the Enter key twice to return to the Analyze mode.

4.9 Special Function Setup

4.9.1 Output Signal Reversal

Someapplicationsrequireareversaloftheoutputsignalsinorderforthe

4-20mAand0-1VDCoutputsignalstocorrespondwiththelowandhighend

oftheconcentrationrange. Forexample,ifanapplicationinvolvestheanalysis

of85%oxygeninabackgroundofargonbymeasuringthethermalconductivity

ofthebinarygas,theanalyzerwouldnormallybesetupsothatthe100%

oxygen(0%argon)concentrationwouldcorrespondtothezerolevel(4mA0V)

oftheoutputsignal. Then,85%oxygen(15%argon)wouldcorrespondto

20mA(1V)inthesignaloutput.

Itmaybeconvenientfortheusertohavetheoutputsreversedsothatthe

85-100%oxygenleveloutputsa4-20mA(0-1V)signalrespectively. Thiscan

beaccomplishedbyreversingthedatainputtothecustomsettings. Notall

applicationswillrequireareversingfunction,however,ifthisisdesirable,itmust

bespecifiedatthetimeofpurchaseoralternatively,bysubstitutingalinearizing

PCboardwiththereversalinformationcontainedtherein. Contactthefactory

forfurtherinformation.

4.9.2 Special - Inverting Output

NOTE: If the unit has a range or ranges that specified >0 unit setup

for inverting.

Thestepsare:

Press RANGE key.

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Thermal Conductivity Analyzer

Part I: Control Unit

UseLEFT/RIGHTkeytomovetotherangethatisspeci-

fiedasinvertingoutput.

PressandholdDOWNkeyforapproximately5to7seconds.

PressENTER key.

NOTE: If the inverting has been setup, “i” shall display on the left

bottom corner. Otherwise, the left bottom corner display ”n”.

Ifmorethatonerangeisspecifiedaninvertingoutput,repeatsteps1

to 4.

4.9.3 Special - Polarity Coding

NOTE: This setup will be identified only when performing GAS TEST

or calculation. Formula 1 will determine which range(s)

willrequired polarity coding.

Iftheanalyzerindicatesanegativeconcentrationwithproperspangasor

formula1indicatesanegativevalue,settheS1accordinglytothetablebelow:

Close S1-5 range 1

Close S1-6 range 2

Close S1-7 range 3

CloseS1-8calrange

PressI/Otorestartthesystem.

4.9.4 Special - Nonlinear Application Gain Preset

NOTE: This section apply during GAS TEST routine for the unit that

has more than one range install with nonlinear output applica-

tion.

Thestepsareasfollows:

Setunitrangetolowestrangereading.

Usingthecomputergeneratedsettingsforthecontroller,

adjustthecontrollersettingsforthemaximumspangas

output.

PressSPANkey. SelectAUTOmodeandsetupthesetting

to span level. Press ENTER key to span.

Setrangeswitchtonextrange.

Press SPAN key.

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4 Operation

Model 2010B

Press and hold the RIGHT key for approximate 5 to 7

seconds.

SelectAUTOandsetthereadingtospangaslevel. Press

ENTERkey.

Repeat steps 1 to 7 if more than two ranges need to be setup.

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Thermal Conductivity Analyzer

Part I: Control Unit

Maintenance

5.1 Routine Maintenance

Aside from normal cleaning and checking for leaks at the gas connec-

tions, routine maintenance is limited to replacing fuses, and recalibration. For

recalibration, see Section 4.4 Calibration.

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS

MANUAL.

5.2 System Self Diagnostic Test

1. Press the System button to enter the system mode.

2. Use the < > arrow keys to move to More, and press Enter.

3. Use the < > arrow keys to move to Self-Test, and press Enter.

The following failure codes apply:

Table 5-1: Self Test Failure Codes

Power

5 V Failure

15 V Failure

Both Failed

Analog

DAC A (0–1 V Concentration)

DAC B (0–1 V Range ID)

Both Failed

(Continued)

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5 Maintenance

Model 2010B

Preamp

OK - > 0 means one or more gain have a

high offset, e.g. 204 means highest

gain has an offset. This error is

common on sealed air cells.

Cell

Failed (open filament, short to ground, no

power.)

Unbalance(deteriorationoffilaments,blocked

tube)

5.3 VFD Display

NOTE:

When a vacuum Fluorescent Display is used, It will not

require contrast adjustment.

If you cannot read anything on the VFD, especially after first powering

up, check that VFD cable is not loose.

5.4 Fuse Replacement

The 2010B requires two 5 x 20 mm, 1 A, T type (Slow Blow) fuses.

The fuses are located inside the enclosure on the Electrical Connector Panel,

as shown in Figure 5-1. To replace a fuse:

1. Disconnect the Unit from its power source.

2. Place a small screwdriver in the notch in the fuse holder cap,

push in, and rotate 1/4 turn. The cap will pop out a few

millimeters. Pull out the fuse holder cap and fuse, as shown in

Figure 5-1.

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Thermal Conductivity Analyzer

Part I: Control Unit

Figure 5-1: Removing Fuse Cap and Fuse from Holder

3. Replace fuse by reversing process in step 1.

Remove Power to the instrument before changing fuses.

5.5 Major Internal Components

The Interconnection Panel and the Front Panel PCBs are accessed by

unlatching and swinging open the front door, as described earlier.

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS

MANUAL.

The 2010B Control Unit contains the following major components:

•

Power Supply

PreampandMotherboardwithMicrocontroller

Display Board and Displays

5 digit LED meter

2 line, 20 character, alphanumeric, VFD

Rear Panel Board.

•

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5 Maintenance

Model 2010B

5.6 Cleaning

If instrument is unmounted at time of cleaning, disconnect the instru-

ment from the power source. Close and latch the front-panel access door.

Clean outside surfaces with a soft cloth dampened slightly with plain clean

water. Do not use any harsh solvents such as paint thinner or benzene.

For mounted instruments, DO NOT wipe the front panel while the

instrument is controlling your process. Clean the front panel as prescribed in

the above paragraph.

5.7 Phone Numbers

CustomerService: (626) 934-1673

Environmental Health and Safety: (626) 961-9221, Extension 1592

Fax: (626) 961-2538

EMERGENCY ONLY: (24-hour pager) 1-800-759-7243

PIN # 1858192

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Part II: Analysis Unit

OPERATING INSTRUCTIONS

Model 2010B

Thermal Conductivity Analyzer

Part II: Analysis Unit

NEC Type

Part Number D-70089

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Model 2010B Thermal Conductivity Analyzer

Table of Contents

1 Introduction

1.1 Overview........................................................................ 1-1

1.2 Connections................................................................... 1-1

1.3 Electrical Connector Panel ............................................ 1-2

2 Installation

2.1 Unpacking the Analysis Unit.......................................... 2-1

2.2 Mounting the Analysis Unit ............................................ 2-1

2.3 Sample System Design ................................................. 2-2

2.4 Pressure and Flowrate Regulation ................................ 2-3

2.5 VENT Exhaust ............................................................... 2-3

2.6 SAMPLE Gas................................................................. 2-4

2.7 REFERENCE Gas......................................................... 2-4

2.8 ZERO Gas ..................................................................... 2-5

2.9 SPAN Gas...................................................................... 2-5

2.10 Electrical Connector Panel ............................................ 2-5

2.11 Signal Wiring Recommendations................................... 2-7

2.12 Testing the System......................................................... 2-7

3 Operation

3.1 System Self Diagnostic Test........................................... 3-1

3.2 Cell Failure Checks ....................................................... 3-2

4 Maintenance

4.1 Routine Maintenance..................................................... 4-1

4.2 Major Components......................................................... 4-1

4.3 Fuse Replacement......................................................... 4-2

4.4 System Self Diagnostic Test........................................... 4-3

4.5 Cell, Heater, and/or Thermistor Replacement ................ 4-4

4.5.1 Removing the Cell Compartment ........................ 4-4

4.5.2 Removing and Replacing the Cell Block............. 4-5

4.5.3 Removing the Heater and/or Thermocouple........ 4-6

4.5.4 Replacing the Heater and/or Thermister .............. 4-7

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Thermal Conductivity Analyzer

Part II: Analysis Unit

Introduction

1.1 Overview

The Analytical Instruments Model 2010B Analysis Unit is a versatile

remotely controlled instrument for measuring a component gas in a back-

ground gas, or in a specific mixture of background gases.

Part 1 of this manual covers the Control Unit. Part II, this part, covers

the Model 2010B NEC type explosion proof Analysis Unit only.

1.2 Connections

The standard 2010 Analysis Unit is housed in a NEC type housing and

includes all gas connections. Figure 1-1 is a cutaway illustration of the

Analysis Unit showing the Gas Connections. The gas connectors are de-

scribed briefly here and in detail in the Installation chapter of this manual.

NOTE: The version of the 2010 Analysis Unit depicted has no options.

The gas connections found on the 2010B Analysis Unit depend on the

options selected. Refer to the outline diagram in the rear of this manual for

the actual configuration. These options may include gas panels with

flowmeters and auto-cal or manual valves as well as flame arrestors. If you

have purchased a unit with a sealed air option, there will not be any refer-

ence gas connections or flowmeter. If you have not purchased a unit with

gas panel, provision must be made to provide zero and span gas to the

sample in port.

•

SAMPLE IN This is the gas input from the sample stream.

This gas connection should have a flowmeter

with a range of 50-200 cc/min.

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1 Introduction

Model 2010B

Figure 1-1: Outline Diagram of 2010B Analysis Unit

•

REFERENCE IN This is the gas input from the flowing

reference gas source. This gas connector should

have a flowmeter with a range of 20-100 cc/

min.

•

SPAN/ZERO These gas inputs have the same requirements as

the sample in connection.

VENTS

Sample and reference gas vents must be re-

turned to areas of equal pressure.

The actual tubing size and connection type will depend on actual

options selected. See outline diagram in the rear of the manual for piping

requirements.

1.3 Electrical Connector Panel

Figure 1-2 shows the internal Electrical Connector Panel. Cables enter

the housing through access ports (visible in Figure 1-1), and connect to

terminals inside the housing. The connectors and controls are described

briefly here. They are described in detail in the Installation, Operation, and

Maintenancechapters, asappropriate.

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Thermal Conductivity Analyzer

Part II: Analysis Unit

Figure 1-2: Electrical Connector/Control Panel

•

Power In

Power input terminals for electric heater.

Requires 110 or 220 V ac, depending on

position of the Voltage Selector switch. Use

50/60 Hz.

CAUTION: Check the position of the Voltage Selector switch

BEFORE applying power to the Power Input termi-

nals.

•

VoltageSelector Power input selector switch for electric heater.

Adjusts input requirement for 110 or

220 V ac, depending on available source

voltage. Use 50/60 Hz.

•

Fuses

1.6 A, 250 V, T type, European size

5 × 20 mm fuses. Fuse 2 is on the neutral side

of the line. Fuse 1 is on the hot side of the

line.

•

Solenoid Valves Terminalsthatprovideallelectricalintercon-

nections from the Control Unit to the gas

controlvalves.

Sensor Signal

Terminals that provide connections from the

T/C sensor to the Control Unit.

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1 Introduction

Model 2010B

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Thermal Conductivity Analyzer

Part II: Analysis Unit

Installation

Installation of the Model 2010B Analyzer includes:

1. Unpacking, mounting, and interconnecting the Control Unit and

the Analysis Unit

2. Making gas connections to the system

3. Making electrical connections to the system

4. Testing the system.

2.1 Unpacking the Analysis Unit

The analyzer is shipped with all materials needed to install and prepare the

system for operation. Carefully unpack the Analysis Unit and inspect it for

damage. Immediately report any damage to the shipping agent.

2.2 Mounting the Analysis Unit

The Model 2010B Analysis Unit is for use in Class 1, Division 1,

Groups C and D, hazardous environments (group B available). The actual

class is limited by the flame arrestor option.

The standard model is designed for bulkhead mounting. Overall dimen-

sions of the Analysis Unit will vary depending on options. The maximum

footprint will be 19″ × 12″, and maximum height 9.4″. An Outline Drawing

at the back of this manual, gives the correct mounting dimensions for your

unit.

Note: The housing, including the cover, protrudes 8.6 to 9.4inches

from the base on which it is mounted. Enough clearance is

required in front of the cover to allow the cover to be re-

moved.

Figure 3-1 is a view with the cover removed showing the external Gas

Connector Panel and the internal Electrical Connector Panel.

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2 Installation

Model 2010B

Figure 3-1: 2010 Analysis Unit with Auto-Cal & Gas Panel options

2-3 Sample System Design

Gas Connector and Selector Panels for specific applications are avail-

able at additional cost . These panels are designed to substitute a standard

frontpanel.

For those customers wishing to incorporate their own sample system,

electronic input/output ports are provided on the rear panel for the operation

of solenoid valves under the complete control of the Model 2010B electron-

ics. See section 3.3. The recommended system piping schematic is included

among the drawings at the rear of the manual

For best results, use the recommended piping system. Select a

flowmeter that can resolve 0.08 scfh (40-50 cc/min) for the reference path of

the analyzer, and select a flowmeter that can resolve 0.3 scfh (150 cc/min)

for the sample path of the analyzer.

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Thermal Conductivity Analyzer

Part II: Analysis Unit

NOTE:

The sample-line pressure regulator should be installed as

close to the sample point as possible to minimize sample-

line lag time.

An additional option is available for SEALED reference

application. This option would not have the reference Gas

Flow Meter, Piping and Fittings.

2-4 Pressure and Flowrate Regulation

Appropriate pressure reducing regulators must be installed at all gas

supply sources. To minimize flowrate adjustments the pressure regulators on

the supporting gas supply cylinders should be adjusted to provide the same

output pressure as the sample line regulator.

The gas pressure at the IN input should be reasonably well regulated.

Pressures between 5 and 50 psig are acceptable (10 psig is normal) as long

as the pressure, once established, will keep the flow constant during analy-

sis and within an acceptable range (between 0.1 and 0.4 scfh—See Note).

Note: Gases lighter than air have a flowrate higher than indicated on

the flowmeter, while gases heavier than air have a flowrate

lower than indicated. Values can range from one half to twice

the indicated flowrate.

For example: For hydrogen or helium, set the flowrate to 0.1

scfh (50 cc/min). For carbon dioxide or argon, set the flowrate

to 0.4 scfh (200 cc/min).

When installing pressure regulators on supply cylinders, crack the

cylinder valves so that gas is flowing during installation. This will eliminate

the most common cause of standardization-gas contamination: air trapped

during assembly diffusing back into the cylinder. This procedure is particu-

larly important in applications where impurity content of 1 to 2 % is the

range of interest.

2-5 VENT Exhaust

There are two separate VENT fittings—one for the sample gas and one

for the reference gas. Use ¹/4 inch tubing for both sample and reference vents

to minimize back pressure from restricted flow.

Exhaust connections must be consistent with the hazard level of the

constituent gases. Check local, state, and federal laws, and ensure that the

exhaust stream vents to an appropriately controlled area if required. If not

vented to the same area, both VENT lines must vent to areas with equal

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2 Installation

Model 2010B

ambient pressures, and pressures must vary no more than the normal baro-

metricchanges.

2-6 SAMPLE Gas

In the standard model, sample and calibration gases are introduced

through the SAMPLE fitting. The gases must be Tee'd into the Sample inlet

withappropriatevalves.

The gas pressure in should be well regulated. The sample line pressure

regulator should be installed as close to the sample line as possible to mini-

mize sample line lag time.

If greater flow is required for improved response time, install a bypass

in the sampling system upstream of the analyzer input.

2-7 REFERENCE Gas

A gas of fixed composition is needed as a reference to which the

sample gas will be compared. The reference gas is normally selected to

represent the main background gas of the analysis.

For most applications, a constant supply of reference gas flowing at the

same rate as the sample is required for best results. However, in many cases

the flow of reference gas can be slowed to about 0.08 scfh (40 cc/min) with

goodresults.

For some applications, an optional sealed air reference is installed. In

sealed-reference sensors the reference side of the detector cell is filled with

air and sealed. This eliminates the need to have reference gas constantly

passing through the cell.

NOTE:For instruments equipped with the optional sealed air refer-

ence, there is no REFERENCE inlet or reference VENT port.

It is highly recommended that the same cylinder of gas be used for both

the REFERENCE gas and the ZERO gas.

Pressure, flow, and safety considerations are the same as prescribed for

the SAMPLE gas, above.

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Thermal Conductivity Analyzer

2-8 ZERO Gas

Part II: Analysis Unit

For the ZERO gas, a supply of the background gas, usually containing

none of the impurity, is required to zero the analyzer during calibration. For

suppressed zero ranges the zero gas must contain the low-end concentration

of the impurity.

NOTE:Because most cylinder gases are between 99.95 and 99.98%

pure, it is highly recommended that the same cylinder of gas

be used for both REFERENCE and ZERO gas.

NOTE:It is essential to the accuracy of the analyzer that the purity of

the zero gas be known. Otherwise, when the zero control is

adjusted during zero standardization, the reading will indicate

the impurity content of the zero gas, rather than zero.

2-9 SPAN Gas

For the SPAN gas, a supply of the background gas containing 70-

100 % of the component of interest is required as a minimum.

Note: If your analyzer range is set for inverting output, your zero gas

will be at 100% of the range interest, and span will be 70 to

100% of the low end range.

If linearization is required, intermediate concentrations of the target gas

in the background gas may be necessary. From one to nine separate span

gases may be used, depending on the desired precision of the linearization.

See chapter 4, Operation.

2-10 Electrical Connector Panel

All electrical connections are made on the internal Electrical Connector

Panel, inside the explosion-proof enclosure, illustrated in Figure 3-3. The

signals are described in the following paragraphs. Wire size and length are

given in the Drawings section at the back of this manual. To access the

Panel, remove the explosion-proof cover as described in chapter 5, Mainte-

nance. NEVER OPEN THE COVER IN A HAZARDOUS ATMO-

SPHERE. THE AREA MUST BE DECLARED TEMPORARILY SAFE

BY THE PROPER AUTHORITY FIRST.

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2 Installation

Model 2010B

Figure 3-4: Control Unit (CU) to Analysis Unit (AU) Connector

If you use your own gas control valves, use the interconnect diagram in

Figure 3-4 for the valves. The sensor and thermistor remain connected as in

Figure 3-5, above. (See drawing D-73170 for wire recommendations.)

Figure 3-5: Remote Probe Connector Pinouts

The voltage from the solenoid outputs is nominally 0 V for the OFF

and 15 V dc for the ON conditions. The maximum combined current that

can be pulled from these output lines is 100 mA. (If two lines are ON at the

same time, each must be limited to 50 mA, etc.)

If more current and/or a different voltage is required, use a relay, power

amplifier, or other matching circuitry to provide the actual driving current.

Note that each individual line has a series FET with a nominal ON resistance

of 5 ohms (9 ohms worst case). This can limit the obtainable voltage, de-

pending on the load impedance applied. See Figure 3-6.

2-6: Part II

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Thermal Conductivity Analyzer

Part II: Analysis Unit

Figure 3-6: FET Series Resistance

2-11 Signal Wiring Recommendations

The signal leads are the bias and sensor leads ref fig. 3.4, and reference

D-73170interconnectiondiagram. Themaximuminterconnectiondistances

between the 2010 control unit and the analysis unit is limited by the sensor

signal requirements. The sensor has two limiting factors. The first is series

resistance which is limited to a maximum of 2.5 ohms. Refer to the intercon-

nection diagram for wire gages and distances which will meet this require-

ment.

The second issue is one of signal quality. At greater distances prob-

lems associated with signal degradation increases. Signal degradation prob-

lems have two major issues. The first is associated with the local installation

environment. The number, proximity, and power associated with local

sources of EMI radiation can not be accounted for by TAI. These issues can

only be controlled by the end user. The other factor is the amplitude of the

signals generated by the thermal conductivity cell. This signal level is a

function of the gas composition of the gases involved. This signal level can

vary from micro-volts to mili-volts dependent on application. Consult TAI

for recommendations based on sample stream composition. Signal quality

and operating distances can be increased by the uses of better quality

shielded low loss cable. The cable configuration should be twisted pair with

double shielding for best performance. The signal cable should not be run

with AC power or digital signals.

2-12 Testing the System

After The Control Unit and the Analysis Unit are both installed and

interconnected, and the system gas and electrical connections are complete,

the system is ready to test. Before plugging either of the units into their

respectivepowersources:

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2 Installation

Model 2010B

•

Check the integrity and accuracy of the gas connections. Make

sure there are no leaks.

Check the integrity and accuracy of the electrical connections.

Make sure there are no exposed conductors

Check that sample pressure is between 3 and 40 psig, according

to the requirements of your process.

Power up the system, and test it as follows:

1. Repeat the Self-Diagnostic Test as described in Part I, chapter 4,

section 4.3.5.

2-8: Part II

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Thermal Conductivity Analyzer

Part II: Analysis Unit

Operation

3.1 System Self Diagnostic Test

The self diagnostics are run automatically by the analyzer whenever the

instrument is turned on, but the test can also be run by the operator at will.

During the test, internal signals are sent through the power supply, output

board and sensor circuit automatically. The return signal is analyzed, and at

the end of the test the status of each function is displayed on the screen,

either as OK or as a number between 1 and 3. (See Table 4-1 for number

code.)

Note: Remote Probe connector must be connected to the Analysis

Unit, or sensor circuit will not be properly checked.

Instructions for running self diagnostics are repeated here for your

convenience:

1. Press the System button to enter the system mode.

2. Use the < > arrow keys to move to More, and press Enter.

3. Use the < > arrow keys to move to Self-Test, and press Enter.

During preamp testing there is a countdown in the lower right corner of

the screen. When the testing is complete, the results are displayed.

Power:OK Analog:OK

Preamp:3

The following failure codes apply:

Table 4-1: Self Test Failure Codes

Power

5 V Failure

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3 Operation

Model 2010B

15 V Failure

Both Failed

Analog

DAC A (0–1 V Concentration)

DAC B (0–1 V Range ID)

Both Failed

Preamp

OK - > 0 means gains of the amplifier have a

high offset, e.g. 204 means the highest

gain has a high offset it is common on

sealedairreference.

The results screen alternates for a time with:

Press Any Key

ToContinue...

Then the analyzer returns to the initial System screen.

3.2 Cell Failure Checks

Cell failure is covered in detail in Part I: Control Units, section 4.4.1.3,

Cell Failure. Cell replacement is covered Part II: Analysis Units chapter 5,

Maintenance.

3-2: Part II

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Thermal Conductivity Analyzer

Part II: Analysis Unit

Maintenance

4.1 Routine Maintenance

Aside from normal cleaning and checking for leaks at the gas connec-

tions,routinemaintenanceislimitedtorecalibration.

Self-diagnostic testing of the system and fuse replacement in the Con-

trol Unit are covered in Part I, chapter 5 of this manual. For recalibration, see

Part I, section 4.4 Calibration.

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS

MANUAL.

4.2 Major Components

The internal components are accessed by rotating the explosion-proof

housing cover counterclockwise several turns until free. See Figure 4-1,

below.

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS

MANUAL.

The 2010B Analysis Unit contains the following major components:

•

TC Cell

Optional Auto-Cal Solenoid Assy.

HeaterAssembly

ElectricalConnectorPanel

Gas Connector Panel (external)

See the drawings in the Drawings section in back of this manual

fordetails.

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4 Maintenance

Model 2010B

Figure 4-1: Major Components

4.3 Fuse Replacement

The 2010B Analysis Unit requires two 5 x 20 mm, 1.6 A, T type

(Slow Blow) fuses. The fuses are located inside the explosion proof housing

on the Electrical Connector Panel, as shown in Figure 4-2. To replace a fuse:

1. Disconnect the Unit from its power source.

2. Place a small screwdriver in the notch in the fuse holder cap,

push in, and rotate 1/4 turn. The cap will pop out a few

millimeters. Pull out the fuse holder cap and fuse, as shown in

Figure 4-2.

Figure 4-2: Removing Fuse Cap and Fuse from Holder

4-2: Part II

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Thermal Conductivity Analyzer

Part II: Analysis Unit

3. Replace fuse by reversing process in step 1.

4.4 System Self Diagnostic Test

1. Press the System button to enter the system mode.

2. Use the < > arrow keys to move to More, and press Enter.

3. Use the < > arrow keys to move to Self-Test, and press Enter.

4. Observe the error-code readings on the VFD Display screen, and

check Table 4-1, below, to interpret the codes.

Table 4-1: Self Test Failure Codes

Power

5 V Failure

15 V Failure

Both Failed

Analog

DAC A (0–1 V Concentration)

DAC B (0–1 V Range ID)

Both Failed

Preamp

OK - > 0 means gains of the amplifier have a

high offset, e.g. 204 means the highest

gain has a high offset it is common on

sealedairreference.

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4 Maintenance

Model 2010B

4.5 Cell, Heater, and/or Thermistor

Replacement

The Thermal Conductivity Cell, with its Heater and Thermistor, is

mounted inside the insulated cell compartment, inside the analysis unit. To

remove these components, you must first remove screw on the cover, and

thecustomerinterface.

4.5.1 Removing the Cell Compartment

WARNING: IF THE MODEL 2010B ANALYZER HAS BEEN USED

WITH TOXIC GASES, FLUSH IT THOROUGHLY

BEFORE PERFORMING THIS PROCEDURE.

WARNING: DISCONNECT ALL POWER TO THE MODEL 2010B

BEFORE PERFORMING THIS PROCEDURE.

Remove the t/c cell as follows:

a. Verify that the power has been removed from the analysis unit

prior to removing cover.

b. Verify that the analysis unit is free from any toxic gas prior

disconnectinganyplumbing.

c. Remove the screw on lid and the six #6 screws securing the

interfacecoverpanel.

d. Remove the cover panel and the four 3/4" #6 stands-off securing

the 1^stinterface PCB.

e. Remove the 1^stPCB and the four 7/16" #6 stand-off securing the

2^ndinterface PCB.

f. Unplug the heater from J3, and the sensor connectors from the

sensor connector J4, and J2, on the upper interface PCB.

Remove the 2^ndPCB. Remove the two #10 screws from the

sensor retaining bracket located at the top of the sensor.

Disconnect the gas fitting and remove the sensor from the

analysisunit.

g. Reassemble in the reverse order, verify that there are no gas leaks

prior to returning the unit to service.

4-4: Part II

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Thermal Conductivity Analyzer

Part II: Analysis Unit

4.5.2 Removing and Replacing the Cell Block

a. Refer to Figure 4-3, which illustrates removal of the Cell Block

from the Cell Compartment. Exploded view is as seen from the

top of the Cell Block.

Figure 4-3: Removal of Cell from Cell Housing

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4 Maintenance

Model 2010B

b. Remove the two screws holding the front mounting bracket—

they also hold the Cell Block Cover to the Cell Block—and then

pull off the cover.

c. Turn the uncovered Cell Block assembly over so that the bottom

faces you. The black rectangular block with four screws is the

Heater Block. Separate the Heater Block from the Cell Block by

removing the four screws. Leave the Heater Block electrical

connectionsconnected.

d. Remove the four screws from each of the black plates that hold

the Cell. The Cell is sandwiched between the plates. You should

now be able to slide the Cell free.

e. Leave the electrical connections connected at the Cell. Unlace the

cabling, and unplug the grey Cell cable at the Interface PCB

connector, J3. The Preamplifier PCB can be more easily

accessed by removing the analyzer's rear panel.

f. Replace the cell by reversing the above procedure, steps a

through e.

g. On analyzers with the sealed air reference option, the thermistor

is epoxied to the front of the cell block.

4.5.3 Removing the Heater and/or Thermocouple

a. Refer to Figure 4-4, which illustrates removal of the Thermistor

and/or Heater from the Cell Compartment. Exploded view is as

seen from the bottom of the Cell Block.

To Interface Board

Thermistor

Heater

Figure 4-4: Removing the Heater and/or Thermocouple

4-6: Part II

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Thermal Conductivity Analyzer

Part II: Analysis Unit

b. Remove the two screws holding the front mounting bracket—

they also hold the Cell Block Cover to the Cell Block—and then

pull off the cover.

c. Turn the uncovered Cell Block assembly over so that the bottom

faces you. The black rectangular block with four screws is the

Heater Block.

d. The Heater is fastened to the Heater Block by a set screw as well

as the silicone sealing compound. The Thermistor is fastened

only by the silicone sealer. (NOTE: On units with sealed air

reference option, the thermistor is epoxied to the front on the

cell.)

(1) To remove the Heater, use a ¹/16 ″ Allen wrench to loosen the

Thermistor set screw. Then, grasp BOTH Heater wires

firmly, and pull the Heater slowly out of the Heater Block,

breaking the silicone seal. Do not allow any foreign matter to

enter the empty duct.

(2) To remove the Thermistor, grasp BOTH Thermistor wires

firmly, and pull the Thermistor slowly out of the Heater

Block, breaking the silicone seal. Do not allow any foreign

matter to enter the empty duct.

e. Undo the cable lacing and separate the Heater/Thermistor wires.

Then, disconnect the wires from the interface PCB.

4.5.4 Replacing the Heater and/or Thermister

a. To replace the Heater and/or Thermister, coat the new element

with silicone sealing compound, and insert it into the duct.

CAUTION: The larger duct is for the Heater element, and the

smaller duct is for the Thermocouple.

b. Enough sealing compound should be on the element to spill over

and seal around the wire where it enters the duct. Smooth the

outer seal and remove any excess. (NOTE: On unit with the

sealed air reference option, the thermistor is expoxied to the

front of the t/c cell.)

c. Reassemble the Cell Compartment by reversing the procedure in

section 4.5.3. Then relace the cabling.

d. Reinstall the Assembled Cell Compartment by reversing the

procedure in section 4.5.1. Then reconnect the wires to J2 on the

interface PCB.

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4 Maintenance

Model 2010B

4-8: Part II

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Thermal Conductivity Analyzer

Appendix

OPERATING INSTRUCTIONS

Models 2010B

Thermal Conductivity Analyzer

Appendix

Bulkhead Mount Control Unit, PN D70845

NEC Type Analysis Unit, PN D70089

NEC Type Analysis Unit, PN D70147

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Appendix

Model 2010B

Contents

A-1 Model 2010B Specifications .......................................... A-3

A-2 Recommended 2-Year Spare Parts List ......................... A-5

A-3 Drawing List ................................................................... A-6

A-2

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Thermal Conductivity Analyzer

Appendix

A-1 Specifications

Ranges: Three ranges plus a cal range, field selectable

within limits (application dependent) and Auto

Ranging

Display: 2 line by 20 alphanumeric VFD accompanied

by 5 digit LED display

Accuracy: ±1% of full scale for most binary mixtures at

constanttemperature

±5% of full scale over operating temperature

range once temperature equilibrium has been

reached

Response Time: 90% in less than 50 seconds

SystemOperating

Temperature: 32°F to 122°F (0 - 50°C)

Sensor Type: StandardTCcell(4-filamentdetector)

SignalOutput: Two 0-1 VDC (concentration and range ID)

Two 4-20 mADC isolated (concentration and

range ID)

Alarm: Twofullyprogrammableconcentrationalarm

set points and corresponding Form C, 3 amp

contacts.

One system failure alarm contact to detect

power, calibration, zero / span and sensor

failure.

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Appendix

Model 2010B

System Power

Requirements: Ex-Proof Analysis Unit 110 or 220 VAC, 50-

60Hz. (InternalSwitchselectable)

Control Unit: Universal Power 85-250 VAC 47-63Hz.

CellMaterial: Nickel plated brass block with nickel alloy

filaments and stainless steel end plates

O/PInterface: Full duplex RS-232, implement a subset of

Tracs Command

Mounting:

Standard: General purpose NEMA-4 Bulkhead mounted

Control Unit

Bulk Head mount Analysis Unit

Options: General purpose relay rack mounted to con-

tain either one or two in a 19” relay rack

mountableplate

* Other configurations, including a totally

explosion-proof,areavailable

Dimensions:

Control Unit: 15.75”H x 11.75”W x 8.5”D

Analysis Unit: 13.6”W x 18.1”H x 8.25”D

Control Unit: General Purpose Flush Panel Mounting

Analysis Unit: Explosion Proof Enclosure is UL and CSA

Listed for Class 1, Division 1, Groups B, C,

D Service. Nema 4/7 rated. (Actual Group

Rating is dependent on options selected)

Watted Parts: 316SS (except cell) standard version.

(Auto-Cal or Gas Panel option include viton

seals. The standard flowmeter includes viton

seals, SS valves, glass metering tube in an

acrylicblock).

A-4

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Thermal Conductivity Analyzer

Appendix

A-2 Recommended 2-Year Spare Parts List

Qty

Part Number Description

D67472

Back Panel Board

C62371B

C65098A

C62365D

D70082

D67651

F768

Front Panel Board

PreamplifierBoard

Main Computer Board

Customer Interface PCB Assy (AU)

Std. T/C Cell Assy. (Brass + SS)

Fuse 1.6A (Analysis Unit)

2010 Front Door w/overlay

Fuse, 1 A, 250V, 5x20mm, T- Slo-Blo

Customer Interface PCB (CU)

D64849B

F1275

D65295B

_____________________

* Order one type only: US or European, as appropriate.

Note: Orders for replacement parts should include the part number

(if available) and the model and serial number of the instru-

ment for which the parts are intended.

Orders should be sent to:

TELEDYNE Analytical Instruments

16830 Chestnut Street

City of Industry, CA 91749-1580

Phone (626) 934-1500

Fax (626) 961-2538

Web: www.teledyne-ai.com

or your local representative.

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Appendix

Model 2010B

A-3 Drawing List

C70381

D70117

C70146

C70335

D70081

D-73170

Outline Drawing (Standard & Auto-Cal option -C)

PipingDiagram

Outline Diagram (AU Auto-Cal Valve and Gas Panel -C-L)

Outline Diagram (gas panel option -L)

SchematicDiagram, InterfaceBoard

InterconnectionDiagram

A-6

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