Teledyne 2010A User Manual

Thermal Conductivity Analyzer

OPERATING INSTRUCTIONS FOR

Model 2010A

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.

ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING. BEFORE
CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR/
MANAGER.

Teledyne Analytical Instruments

P/N M70194

07/19/05

ECO # 05-0131

i

Model 2010A

Copyright © 1998 Teledyne Analytical Instruments

All Rights Reserved. No part of this manual may be reproduced, transmitted, tran­scribed, stored in a retrieval system, or translated into any other language or computer lan­guage in whole or in part, in any form or by any means, whether it be electronic, mechani­cal, magnetic, optical, manual, or otherwise, without the prior written consent of Teledyne
Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-1580.

Warranty

This equipment is sold subject to the mutual agreement that it is warranted by us
free from defects of material and of construction, and that our liability shall be limited
to replacing or repairing at our factory (without charge, except for transportation), or at
customer plant at our option, any material or construction in which defects become ap­parent within one year from the date of shipment, except in cases where quotations or
acknowledgments provide for a shorter period. Components manufactured by others bear
the warranty of their manufacturer. This warranty does not cover defects caused by wear,
accident, misuse, neglect or repairs other than those performed by Teledyne or an autho­rized service center. We assume no liability for direct or indirect damages of any kind and
the purchaser by the acceptance of the equipment will assume all liability for any damage
which may result from its use or misuse.

We reserve the right to employ any suitable material in the manufacture of our ap­paratus, and to make any alterations in the dimensions, shape or weight of any parts, in so
far as such alterations do not adversely affect our warranty.

Important Notice

This instrument provides measurement readings to its user, and serves as a tool by
which valuable data can be gathered. The information provided by the instrument may as­sist the user in eliminating potential hazards caused by his process; however, it is essential
that all personnel involved in the use of the instrument or its interface, with the process
being measured, be properly trained in the process itself, as well as all instrumentation
related to it.

The safety of personnel is ultimately the responsibility of those who control pro­cess conditions. While this instrument may be able to provide early warning of imminent
danger, it has no control over process conditions, and it can be misused. In particular, any
alarm or control systems installed must be tested and understood, both as to how they
operate and as to how they can be defeated. Any safeguards required such as locks, labels,

or redundancy, must be provided by the user or specically requested of Teledyne at the

time the order is placed.

Therefore, the purchaser must be aware of the hazardous process conditions.
The purchaser is responsible for the training of personnel, for providing hazard warning
methods and instrumentation per the appropriate standards, and for ensuring that hazard
warning devices and instrumentation are maintained and operated properly.

Teledyne Analytical Instruments, the manufacturer of this instrument, cannot
accept responsibility for conditions beyond its knowledge and control. No statement ex­pressed or implied by this document or any information disseminated by the manufacturer
or its agents, is to be construed as a warranty of adequate safety control under the user’s

process conditions.

ii

Teledyne Analytical Instruments

Thermal Conductivity Analyzer

Table of Contents

Specic Model Information ..................................iv

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

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

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

Teledyne Analytical Instruments

iii

Model 2010A

Specic 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:

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

valves are electronically controlled to provide synchronization
with the analyzer’s operations.

q G: Stainless steel cell block with nickel laments and Stainless

Steel ttings and tubing.

q H: Stainless steel cell block with gold laments for corrosive gas

streams and Stainless Steel ttings and tubing.

q K: 19” Rack Mount option with one or two analyzer Control

Units installed and ready to mount in a standard rack.

q K2: 19” Rack Mount option with two Control Units mounted.

q K3: 19” Rack Mount option with one Control Unit mounted and a

blank cover installed in the second Control Unit location.

q L: Gas selector panel consisting of sample/ref ow meters and

control valves for metering input of sample/calibrations sup­port gases.

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

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

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

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

valves option (Ref. C above)

q O: Flame Arrestors for Group B (hydrogen)

q R: Sealed Reference Cell

iv

Teledyne Analytical Instruments

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) .....................................

1.6 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 Conguration ................................................ 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

1-3

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

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

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v

Model 2010A

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 ..............

4.3.4 Logging Out .............................................................

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

4.4.1 Zero Cal ...................................................................

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

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

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

4.6.1 Manual (Select/Dene 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

4.9 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

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

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

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

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

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

4-7
4-9

4-12

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

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

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

vi

Teledyne Analytical Instruments

Thermal Conductivity Analyzer

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

Appendix

A-1 Specications .................................................................. A-1

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

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

A-4 TG Option Calibration..................................................... A-5

A-3

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vii

Model 2010A

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 Tele-

dyne, no responsibility by Teledyne, its afliates, and agents

for damage or injury from misuse or neglect of this equipment
is implied or assumed.

viii

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

Introduction

1.1 Overview

The Model 2010 is a family of split conguration conductivity analyz-

ers. Each analyzer consist of a Control Unit suitable for installation in a
general purpose area, and a Analysis Unit which is housed in an explosion­proof enclosure. The Analysis Unit enclosure is rated for NEMA 4/7 Class
I, Div. 1, Groups B,C,D and is approved by U/L and CSA.

The Analytical Instruments Model 2010A Thermal Conductivity
Analyzer is a versatile microprocessor-based instrument for measuring a
component gas in a background gas, or in a specic mixture of background
gases. It compares the thermal conductivity of a sample stream with that of
a reference gas of known composition. The 2010A can—

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

• measuretheconcentrationofagasinaspecicmixtureofback

ground gases.

• measure the purity of a sample stream containing a single impu­rity or a mixture of impurities.

The standard 2010A is pre-programmed with automatic linearization
algorithms for a large number of gases and gas mixtures. The factory can
add to this data base for custom applications, and the sophisticated user can
add his own unique applications.

This manual section covers the Model 2010A General Purpose ush­panel and rack-mount control units only. These control units are for
indoor use in a nonhazardous environment.

Many of the Model 2010A features covered in this manual are op­tional, selected according to the customers specic application. Refer to the
specic model information sheet (page IV) for the options incorporated in
the instrument.

-

Teledyne Analytical Instruments

Part I 1-1

1 Introduction Model 2010A

1.2 Typical Applications

A few typical applications of the Model 2010A are:

• Power generation

• Air liquefaction

• Chemical reaction monitoring

• Steel manufacturing and heat treating

• Petrochemical process control

• Quality assurance

• Refrigeration and storage

• Gas proportioning control.

1.3 Main Features of the Analyzer

The main features of the Model 2010A Thermal Conductivity Ana-

lyzer include:

• Threeindependent,userdenable,analysisrangesallowupto

three different gas applications with one concentration range
each, or up to three concentration ranges for a single gas appli-

cation,oranycombination.

• Specialrecalibrationrangeformultipleapplications.Recalibrat­ing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 al-

lowstheusertolockontoaspecicrangeofinterest.

• RS-232 serial digital port for use with a computer or other digi­tal communications device.

• Sixadjustableconcentrationsetpointswithtwoalarmsanda

system failure alarm relay.

• 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

• Standard, proven sensor cell design.

• Wide range of custom applications, ranges, and linearization.

1-2 Part

concentrationfromlarge,bright,meterreadout.(0-9999ppm
through0-100%dependingontypesofgasinvolved.)

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

• Microprocessorbasedelectronics:8-bitCMOSmicroprocessor
with32kBRAMand128kBROM.

• Autoandremotecalibrationcapabilities.

• Fouranalogoutputs:twoformeasurement(0–1VdcandIso­lated4–20mAdc)andtwoforrangeidentication.

• Compactandversatiledesign:Smallfootprint,yetinternalcom­ponentsareaccessible.

1.4 Model Designations

The Model 2010A is ordinarily custom programmed at the factory to
t the customer’s application. Many parameters, including the number of
channels, the gas application, the materials specication of the sampling
system, and others, are options. The most common options, are covered in
this manual. See the Specic Model Information checklist in the front mat­ter of this manual for those that apply to your Model 2010A analyzer. Some
standard models that are not covered in this manual are listed here.

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

general purpose enclosure.

Models 2020: Boththeanalysissectionandcontrolunitareinasingle

explosion proof enclosure.

1.5 Operator Interface (Front Panel)

The standard 2010A is housed in a rugged metal case with all controls
and displays accessible from the front panel. See Figure 1-1. The front
panel has thirteen buttons for operating the analyzer, a digital meter, and an
alphanumeric display. They are described briey here and in detail in the
Operations chapter of this manual.

Function Keys: Six touch-sensitive membrane switches are used to
change the specic function performed by the analyzer:

• Analyze Perform analysis for target-gas content of a sample
gas.

• System Performsystem-relatedtasks(describedindetailin
chapter 4, Operation.).

• Span  Spancalibratetheanalyzer.

• Zero  Zerocalibratetheanalyzer.

Teledyne Analytical Instruments

Part I 1-3

1 Introduction Model 2010A

Figure 1-1: Model 2010A Front Panel

• Alarms Setthealarmsetpointsandattributes.

• Range Setuptheuserdenablerangesfortheinstrument.

Data Entry Keys: Six touch-sensitive membrane switches are used to

input data to the instrument via the alphanumeric VFD (Vacuum Fluores­cent Display) display:

• Left & Right Arrows Selectbetweenfunctionscurrently

displayedontheVFDscreen.

• Up & Down Arrows Incrementordecrementvaluesof

functions currently displayed.

• 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.

Digital Meter Display: The meter display is a VFD device that
produces large, bright, 7-segment numbers that are legible in any lighting.
It produces a continuous trace readout from 0-9999 ppm or a continuous

1-4 Part

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

percent readout from 1-100 %. It is accurate across all analysis ranges.

Alphanumeric Interface Screen: The VDF screen is an easy-to-use
interface between operator and analyzer. It displays values, options, and
messages that give the operator immediate feedback.

Standby Button: The Standby turns off the display and

outputs, but circuitry is still operating.

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.

Access Door: For access to the thermal conductivity sensor or the
front panel electronics, the front panel swings open when the latch in the
upper right corner of the panel is pressed all the way in with a narrow
gauge tool. Accessing the main electronics circuit board requires unfasten­ing rear panel screws and sliding the electronics drawer out of the case.
(See chapter 5.)

1.6 Recognizing Difference Between LCD & VFD

LCD (Liquid Crystal Display) has GREEN background with BLACK
characters. VFD has DARK background with GREEN characters. In the
case of VFD (Vacuum Fluorescent Display) - NO CONTRAST ADJUST-

MENT IS NEEDED.

1.7 Equipment Interface (Rear Panel)

The rear panel, shown in Figure 1-2, contains the electrical connec­tors for external input and output. The connectors are described briey here
and in detail in chapter 3, Installation.

Teledyne Analytical Instruments

Part I 1-5

1 Introduction Model 2010A

Figure 1-2: Model 2010A Rear Panel

• Power Connection 85-250VACpowersource.

• Analog Outputs 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.

• Alarm Connections 2concentrationalarmsand1system

alarm.

• RS-232 Port Serial digital concentration signal out-

put and control input.

• Remote Probe Usedinthe2010Atointerfacetheex-

ternal Analysis Unit.

• Remote Span/Zero Digitalinputsallowexternalcontrolof

analyzercalibration.

• Calibration Contact To notify external equipment that in-

strumentisbeingcalibratedandread­ings are not monitoring sample.

• Range ID Contacts Fourseparate,dedicated,range-identi-

cationrelaycontacts(01,02,03,CAL).

• Network I/O Serial digital communications for local

networkaccess.Forfutureexpansion.

Not implemented at this printing.

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

1-6 Part

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

Auto-Cal control where possible. The internal clock in the
Model 2010A is accurate to 2-3 %. Accordingly, internally
scheduled calibrations can vary 2-3 % per day.

Teledyne Analytical Instruments

Part I 1-7

1 Introduction Model 2010A

1-8 Part

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

Operational Theory

2.1 Introduction

The analyzer is composed of two subsystems:

1. Thermal Conductivity Sensor

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 simpli­fies operation of the analyzer and accurately processes the sampled data. A
microprocessor controls all signal processing, input/output, and display
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 unbal­ances if the resistances of its two legs do not match. See Figure 2-1(b).

Teledyne Analytical Instruments

Part I 2-1

2 Operational Theory Model 2010A

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 com­pensate 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 measure­ment, calibration gases of known composition are required to fix the upper
and lower parameters (“zero” and “span”) of the range, or ranges, of analy­sis. 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 electron­ics to produce a standard 0-1V, or an isolated 4–20 mA dc, output signal, as
described in the next section.

2-2 Part I

Teledyne Analytical Instruments

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 indi­cated. 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 spe­cific, 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 2010A 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

Teledyne Analytical Instruments

Part I 2-3

2 Operational Theory Model 2010A

e

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

Thermistor

Tem p erature

Control

Temperature

Control

Sensor

Heater

Heater

Differential

Amplifie r

Fine

Adjus tment

Selt-Test Signal to MUX

Variabl

Gain

Amplifie r

Auto-

Range

Coarse

Adjustm ent

A to D

Converter
M
U
X

D ig itia l to

Analog

Converter

(DA C )

To CPU

0-1 V dc
Concen tration
and Range

4-20 mA dc
Concen tration
and Range

Alarm 1

Alarm 2

System
F ailure
Alarm

Keyboard

Displays

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

2-4 Part I

Processing

Power

Supply

A to D C o n v

Teledyne Analytical Instruments

Central

Processing

Unit

(C P U )

RS-232

Range
Contacts (4)

External
Valve
Control

Remote Span
Control

Remote Zero
Control

Cal

Contact

Thermal Conductivity Analyzer Part I: Control Unit

In the presence of dissimilar gases the sensor generates a differential
voltage across its output terminals. A differential amplifier converts this
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
failure alarm.

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 con­trolled to 60oC.

The Temperature Control keeps the temperature of the measuring cell
regulated to within 0.1 degree C. A thermistor is used to measure the tem­perature, 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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Part I 2-5

2 Operational Theory Model 2010A

2-6 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

Installation

Installation of the Model 2010A Analyzer includes:

1. Unpacking

2. Mounting

3. Gas connections

4. Electrical connections

5. Testing the system.

3.1 Unpacking the Analyzer

The analyzer is shipped ready to install and prepare 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 2010A Control Unit is for indoor use in a general purpose
area. It is NOT for hazardous environments of any type. It must be protected
from:

• Direct sunlight

• Drafts of air

• Shock and vibration

• Temperatures below 30 °F (-1 °C) or above 110 °F (43 °C).

Locate the 2010A as close as possible, subject to the above conditions,
to the Analysis Unit.

The standard model is designed for ush panel mounting. Figure 3-1 is

an illustration of the 2010A standard front panel and mounting bezel. There
are four mounting holes—one in each corner of the rigid frame. Figure 3-1a
contains the hole pattern dimensions. See the outline drawing, at the back of
this manual for overall dimensions.

On special order, a 19" rack-mounting panel can be provided. For rack

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Part I 3-1

3 Installation Model 2010A

mounting, one or two 2010A series analyzers are ush-panel mounted on

the rack panel. See Figure 3-1b for dimensions of the mounting panel.

HHinge

LLatch

Hinge

Figure 3-1a: Front Panel of the Model 2010A

Figure 3-1b: Single and Dual 19" Rack Mounts

All operator controls are mounted on the front panel, which is hinged
on the left edge and doubles as the door that provides access to the sensor
inside the instrument. The door is spring loaded and will swing open when
the button in the center of the latch (upper right corner) 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 radius of 7.62 inches. See Figure 3-2.

3-2 Part I

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Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

Figure 3-2: Required Front Door Clearance

3.3 Electrical Connections (Rear Panel)

Figure 3-3 shows the Model 2010A rear panel: power, communica­tion, alarm relays, remote probe and control valves, analog concentration
output and analog range indicators.

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

For safe connections, ensure that no uninsulated wire extends outside
of the connectors they are attached to. Stripped wire ends must insert com­pletely into terminal blocks. No uninsulated wiring should be able to come

in contact with ngers, tools or clothing during normal operation.

Use shielded cable, nominally 20 to 22 gauge wire (depending on

length), with shield grounded appropriately for the specic installation.

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Part I 3-3

3 Installation Model 2010A

3.3.1 Primary Input Power

The power cord receptacle and fuse block are located in the same as­sembly. Insert the female plug end of the power cord into the power cord
receptacle.

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

CUITRY AS LONG AS THE INSTRUMENT IS CON­NECTED TO THE POWER SOURCE. THE RED I/O
SWITCH ON THE FRONT PANEL IS FOR SWITCH­ING 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 RE­MOVED!

The Control Unit is universal power 100-240V, 50-60 Hz. The Analy­sis Unit requires 110 or 220 VAC and is selectable via switch located inside
the explosion-proof enclosure.

3.3.2 Fuse Installation

The fuse block, at the right of the power cord receptacle, accepts US
or European size fuses. A jumper replaces the fuse in the neutral line when
the US size fuses are used. 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
installation. (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: Voltage rises linearly with increasing concentra-

tion, 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.

3-4 Part I

Teledyne Analytical Instruments

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 se-

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

was dened 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 4.0
1 0.1 5.6
2 0.2 7.2
3 0.3 8.8
4 0.4 10.4
5 0.5 12.0
6 0.6 13.6
7 0.7 15.2
8 0.8 16.8
9 0.9 18.4
10 1.0 20.0

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

(Continued)

Teledyne Analytical Instruments

Part I 3-5

3 Installation Model 2010A

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 8 0-1 % H2 in N2

Range 2 0.50 12 0-10 % H2 in N2

Range 3 0.75 16 0-1 % H2 in Air

Range 4 (Cal) 1.00 20 0-1 % H2 in N2

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
diagrams 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 congured as high (actuates when concen

tration is above threshold), or low (actuates when
concentration is below threshold).

• Can be congured as fail-safe or non-fail-safe.

• Can be congured as latching or nonlatching.

• Can be congured out (defeated).

Threshold Alarm 2: • Can be congured as high (actuates when concen

tration is above threshold), or low (actuates when
concentration is below threshold).

• Can be congured as fail-safe or non-fail-safe.

• Can be congured as latching or nonlatching.

• Can be congured out (defeated).

System Alarm: Actuates when DC power supplied to circuits is

unacceptable in one or more parameters. Perma-

nently congured as fail-safe and latching. Cannot

be defeated.

Actuates when cell can not balance during zero cali

bration.

Actuates when span parameter out off its limited

parameter.

-

-

-

Actuates when self test fails.

3-6 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

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

press I/O again and any other button EXCEPT Sys-
tem to resume.

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 appro­priately. See 3.3.9 Remote Probe Connector. (With the –C
option, the internal valves operate automatically.)

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 appro­priately. See 3.3.9 Remote Probe Connector. (With the –C
option, the internal valves operate automatically.)

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 2010A Analyzer, the customer's controller must
monitor the Cal Relay Contact.

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.

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3 Installation Model 2010A

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 close again.

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).

For example:

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 sig-

nals to operate the zero and span gas valves synchronously.
However, if you have the –C, -P, or -Q Internal valve option,
which includes zero and span gas inputs, the 2010A automati-

cally selects the zero, span and sample gas ow.

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 Network I/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
instrument.

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Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

3.3.8 RS-232 Port

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 Description

as<enter> Immediately starts an autospan.

az<enter> Immediately starts an autozero.

rp<enter> 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> Range manual 1

rm2<enter> Range manual 2

rm3<enter> Range manual 3

rm4<enter> Range manual CAL

ra<enter> Range auto

Implementation: The RS-232 protocol allows some exibility in its

implementation. Table 3-4 lists certain RS-232 values that are required by
the Model 2010A implementation.

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3 Installation Model 2010A

Table 3-4: Required RS-232 Options

Parameter Setting

Baud 2400
Byte 8 bits
Parity none
Stop Bits 1
Message Interval 2 seconds

3.3.9 Remote Probe Connector

The 2010A is a single-split conguration analyzer, the Remote Probe

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

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 amplier, 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.

3-10 Part I

Teledyne Analytical Instruments

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 ow 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 intro­duction screen for thirty minutes. This is to allow the cell to come up to
temperature (60oC). 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.

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Part I 3-11

3 Installation Model 2010A

3-12 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

Operation

4.1 Introduction

Although the Model 2010A is usually programmed to your application at

the factory, it can be further configured at the operator level, or even, cautious-
ly, reprogrammed. Depending on the specifics of the application, this might
include all or a subset of the following procedures:

• Setting system parameters:

• Establish a security password, if desired, requiring Operator
to log in.

• Establish and start an automatic calibration cycle, if desired.

• Routine Operation:

• Calibrate the instrument.

• Choose autoranging or select a fixed range of analysis.

• Set alarm setpoints, and modes of alarm operation (latching,
fail-safe, etc).

• Program/Reprogram the analyzer:

• Define new applications.

• Linearize your ranges.

If you choose not to use password protection, the default password is

automatically displayed on the password screen when you start up, and you
simply press Enter for access to all functions of the analyzer.

4.2 Using the Data Entry and Function
Buttons

Data Entry Buttons: The < > buttons select options from the menu

currently being displayed on the VFD screen. The selected option blinks.

When the selected option includes a modifiable item, the

can be used to increment or decrement that modifiable item.

Teledyne Analytical Instruments

ΔΔ

Δ∇ arrow buttons

ΔΔ

Part I 4-1

4 Operation Model 2010A

The Enter button is used to accept any new entries on the VFD screen.

The Escape button is used to abort any new entries on the VFD screen that are
not yet accepted by use of the Enter button.

Figure 4-1 shows the hierarchy of functions available to the operator via the

function buttons. The six function buttons on the analyzer are:

• 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

• Initiate a Self-Test

Three of the subfunctions do auxiliary tasks:

• Checking model and software version

• Display more subfunctions

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
programming section, or contact factory.)

• 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/or fail-safe.

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

switched automatically with autoranging or used as individual
fixed ranges.

Any function can be selected at any time by pressing the appropriate button
(unless password restrictions apply). The order as presented in this manual is
appropriate for an initial setup.

Each of these functions is described in greater detail in the following proce­dures. The VFD screen text that accompanies each operation is reproduced, at
the appropriate point in the procedure, in a Monospaced type style. Push­button names are printed in Oblique type.

4-2 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

System

CONTRAST

AUTO-CAL

PASSWORD

LOGOUT

MORE

MODEL

APPLICATION

SELF-TEST

ALGORITHM

Set LCD
Contrast

Span/Zero

Off/On

Enter

Password

Secure Sys &

Analyze Only

Show Model
and Version

Select
Range

Self-Test in

Progress

Select
Range

Contrast Function is DISABLED

(Refer to Section 1.6)

Span/Zero

Timing

Change

Yes/No

Define

Appl/Range

Slef-Test

Results

Gas Use

Range

Yes

Span/Zero

Off/On

Change

Password

Ver

Select

Verify/Setup

Set

Verify

Points

Man

Auto/Manual
Linearity Cal

Auto

Verify

Password

Input/Output

Select Linrty
Span Values

Values

Enter

Enter

Enter

Zero

Span

Alarms

Range

Analyze

Auto/Manual

Zero Select

Auto/Manual

Span Select

Select
Range

Man

Auto/Manual

Range Adj

Auto

Analyze

Sample

Progress

Span Value

Gas Use

Range

Select

Range

Gas

Application

Zero in

Set

Define
Range

Span in

Progress

% / ppm

Select

Setpoints &

Attributes

Figure 4-1: Hierarchy of Functions and Subfunctions

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4 Operation Model 2010A

4.3 The System Function

The subfunctions of the System function are described below. Specific
procedures for their use follow the descriptions:

• 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

with analyzer settings.

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

additional subfunctions listed.

• MODEL: Displays Manufacturer, Model, and Software Version

of instrument.

• APPLICATION: A restricted function, not generally accessed by

the end user. Used to define up to three analysis ranges and a
calibration range (including impurity, background, low end of range,
high end of range, and % or ppm units).

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

check the integrity of the power supply, output boards, sensor
cell, and preamplifiers.

• ALGORITHM: A restricted function, not generally accessed by the

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

4-4 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

4.3.1 Setting the Display

Contrast Function is DISABLED

(Refer to Section 1.6)

If you cannot read anything on the VFD after first powering up:

1. Observe LED readout.

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

When proper automatic valving is connected (see chapter 3, installation),
the Analyzer can cycle itself through a sequence of steps that automatically zero
and span the instrument.

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 2010A 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:

Choose System from the Function buttons. TheVFD will display five
subfunctions.

Contrast Function is DISABLED

(Refer to Section 1.6)

Teledyne Analytical Instruments

CONTRAST AUTO—CAL
PWD LOGOUT MORE

Part I 4-5

4 Operation Model 2010A

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

for ZERO/SPAN set appears.

ZERO in Ød Øh off
SPAN in Ød Øh off

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.

Zero schedule: OFF
Day: Ød Hour: Øh

ΔΔ

Use

Δ∇ arrows to set an interval value, then use < > arrows to move to the

ΔΔ

start-time value. Use

ΔΔ

Δ∇ arrows to set a start-time value.

ΔΔ

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/
ON field. Use

ΔΔ

Δ∇ arrows to set the OFF/ON field to ON. You can now turn

ΔΔ

these fields ON because there is a nonzero span interval defined.

4.3.3 Password Protection

Before a unique password is assigned, the system assigns TAI by default.
This password will be displayed automatically. The operator just presses the
Enter key to be allowed total access to the instrument’s features.

If a password is assigned, then setting the following system parameters can
be done only after the password is entered: alarm setpoints, assigning a new
password, range/application selections, and curve algorithm linearization.
(APPLICATION and ALGORITHM are covered in the programming section.)
However, the instrument can still be used for analysis or for initiating a self-test
without entering the password. To defeat security the password must be
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 Entering the Password

To install a new password or change a previously installed password, you

must key in and ENTER the old password first. If the default password is in
effect, pressing the ENTER button will enter the default TAI password for you.

Press System to enter the System mode.

Contrast Function is DISABLED

(Refer to Section 1.6)

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

Enter to select the password function. Either the default TAI password or AAA
place holders for an existing password will appear on screen depending on
whether or not a password has been previously installed.

The screen prompts you to enter the current password. If you are not using

password protection, press Enter to accept TAI as the default password. If a
password has been previously installed, enter the password using the < > arrow
keys to scroll back and forth between letters, and the
the letters to the proper password. Press Enter to enter the password.

In a few seconds, you will be given the opportunity to change this pass-

word or keep it and go on.

CONTRAST AUTO—CAL
PWD LOGOUT MORE

Enter password:
T A I

or

Enter password:
A A A

ΔΔ

Δ∇ arrow keys to change

ΔΔ

Change Password?
<ENT>=Yes <ESC>=No

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

below.

4.3.3.2 Installing or Changing the Password

If you want to install a password, or change an existing password, proceed
as above in Entering the Password. When you are given the opportunity to
change the password:

Change Password?
<ENT>=Yes <ESC>=No

Press Enter to change the password (either the default TAI or the previ-
ously assigned password), or press Escape to keep the existing password and
move on.

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4 Operation Model 2010A

If you chose Enter to change the password, the password assignment

screen appears.

Select new password
T A I

Enter the password using the < > arrow keys to move back and forth

between the existing password letters, and the

ΔΔ

Δ∇ arrow keys to change the

ΔΔ

letters to the new password. The full set of 94 characters available for password
use are shown in the table below.

Characters Available for Password Definition:

ABCDEFGHI J
KL MNOPQRST
UVWXYZ[¥]^
_` abcdef gh
i j kl mnopqr
st uvwxyz{|
} → ! " #$%&' (
)*+'-./012
3456789: ; <
=>?@

When you have finished typing the new password, press Enter. A verifica-

tion screen appears. The screen will prompt you to retype your password for
verification.

Enter PWD To Verify:
A A A

Use the arrow keys to retype your password and press Enter when
finished. Your password will be stored in the microprocessor and the system will
immediately switch to the Analyze screen, and you now have access to all
instrument functions.

If all alarms are defeated, the Analyze screen appears as:

1.95 % H2 in N2
nR1: Ø — 1Ø Anlz

If an alarm is tripped, the second line will change to show which alarm it is:

1.95 % H2 in N2
AL—1

4-8 Part I

Teledyne Analytical Instruments

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 pass­word to gain access to Alarm, and Range functions.

4.3.4 Logging Out

The LOGOUT function provides a convenient means of leaving the

analyzer in a password protected mode without having to shut the instrument off.
By entering LOGOUT, you effectively log off the instrument leaving the system
protected against use until the password is reentered. To log out, press the
System button to enter the System function.

Contrast Function is DISABLED

(Refer to Section 1.6)

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

tion, and press Enter to Log out. The screen will display the message:

4.3.5 System Self-Diagnostic Test

The Model 2010A has a built-in self-diagnostic testing routine. Pre­programmed signals are sent through the power supply, output board, preamp
board and sensor circuit. 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 1024. (See System Self Diagnostic Test in chapter 5
for number code.) If any of the functions fails, the System Alarm is tripped.

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

present in both channels at the time of the SELF-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. To
initiate a self diagnostic test during operation:

CONTRAST AUTO—CAL
PWD LOGOUT MORE

Protected until
password entered

Press the System button to start the System function.

Contrast Function is DISABLED

(Refer to Section 1.6)

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

Use the < > arrow keys again to move the blinking to the SELF–TEST
and press Enter. The screen will follow the running of the diagnostic.

CONTRAST AUTO—CAL
PWD LOGOUT MORE

MODEL APPLICATION
SELF—TEST ALGORITHM

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4 Operation Model 2010A

RUNNING DIAGNOSTIC
Testing Preamp — Cell

When the testing is complete, the results are displayed.

Power: OK Analog: OK
Cell: 2 Preamp: 3

The module is functioning properly if it is followed by OK. A number

indicates a problem in a specific area of the instrument. Refer to Chapter 5
Maintenance and Troubleshooting for number-code information. The results
screen alternates for a time with:

Press Any Key
To Continue...

Then the analyzer returns to the initial System screen.

4.3.6 The Model Screen

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

blinking, press Enter. The screen displays the manufacturer, model, and soft­ware version information.

4.3.7 Checking Linearity with ALGORITHM

From the System Function screen, select ALGORITHM, and press

Enter.

sel rng to set algo:
—> Ø1 Ø2 Ø3 <—

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

Gas Use: H2 — N2
Range: Ø — 10%

Press Enter again.

Algorithm setup:
VERIFY SET UP

Select and Enter VERIFY to check whether the linearization has been

accomplished satisfactorily.

4-10 Part I

Dpt INPUT OUTPUT
Ø Ø.ØØ Ø.ØØ

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

The leftmost digit (under Dpt) is the number of the data point being moni­tored. Use the Δ∇ keys to select the successive points.

The INPUT value is the input to the linearizer. It is the simulated output of
the analyzer. You do not need to actually flow gas.

The OUTPUT value is the output of the linearizer. It should be the ACTU-
AL concentration of the span gas being simulated.

If the OUTPUT value shown is not correct, the linearization must be
corrected. Press ESCAPE to return to the previous screen. Select and Enter
SET UP to Calibration Mode screen.

Select algorithm
mode : AUTO

There are two ways to linearize: AUTO and MANUAL: The auto mode
requires as many calibration gases as there will be correction points along the
curve. The user decides on the number of points, based on the precision re­quired.

The manual mode only requires entering the values for each correction
point into the microprocessor via the front panel buttons. Again, the number of
points required is determined by the user.

4.4 The Zero and Span Functions

(1) The Model 2010A can have as many as three analysis ranges plus a
special calibration range (Cal Range); and the analysis ranges, if more than one,
may be programmed for separate or identical gas applications.

(2) If all ranges are for the same application, then you will not need the Cal
Range. Calibrating any one of the ranges will automatically calibrate the others.

(3) If: a) each range is programmed for a different gas application, b) your
sensor calibration has drifted less than 10 %, and c) your Cal Range was cali­brated along with your other ranges when last calibrated, then you can use the
Cal Range to calibrate all applications ranges at once.

If your Model 2010A analyzer fits the paragraph (3) description, above,
use the Cal Range. If your analyzer has drifted more than 10 %, calibrate each
range individually.

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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Part I 4-11

4 Operation Model 2010A

The analyzer is calibrated using reference, zero, and span gases. Gas
requirements are covered in detail in chapter 3, section 3.4 Gas Connections.
Check that calibration gases are connected to the analyzer according to the
instructions in section 3.4, observing all the prescribed precautions.

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.

Readjust the gas pressure into the analyzer until the flowrate through the
sensor settles between 50 to 200 cc/min (approximately 0.1 to 0.4 scfh).

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

flowrate of sample gas as possible

4.4.1 Zero Cal

The Zero button on the front panel is used to enter the zero calibration
function. Zero calibration can be performed in either the automatic or manual
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 Auto Mode Zeroing

Observe the precautions in sections 4.4 and 4.4.1, above. Press Zero to
enter the zero function mode. The screen allows you to select whether the zero
calibration is to be performed automatically or manually. Use the Δ∇ arrow
keys to toggle between AUTO and MAN zero settling. Stop when AUTO
appears, blinking, on the display.

Select zero
mode: AUTO

Press Enter to begin zeroing.

4-12 Part I

####.## % H2 — N2
Slope=#.### C—Zero

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

The beginning zero level is shown in the upper left corner of the display. As

the zero reading settles, the screen displays and updates information on Slope=
in percent/second (unless the Slope starts within the acceptable zero range and
does not need to settle further). The system first does a course zero, shown in
the lower right corner of the screen as
zero, and displays

F—Zero

, for 3 min.

C—Zero

, for 3 min, and then does a fine

Then, and whenever Slope is less than 0.01 for at least 3 min, instead of

Slope you will see a countdown: 9 Left, 8 Left, and so fourth. These are
software steps in the zeroing process that the system must complete, AFTER
settling, before it can go back to Analyze. Software zero is indicated by S–
Zero in the lower right corner.

####.## % H2 — N2
4 Left=#.### S—Zero

The zeroing process will automatically conclude when the output is within

the acceptable range for a good zero. Then the analyzer automatically returns to
the Analyze mode.

4.4.1.2 Manual Mode Zeroing

Press Zero to enter the Zero function. The screen that appears allows you

to select between automatic or manual zero calibration. Use the Δ∇ keys to
toggle between AUTO and MAN zero settling. Stop when MANUAL appears,
blinking, on the display.

Select zero
mode: MANUAL

Press Enter to begin the zero calibration. After a few seconds the first of

three zeroing screens appears. The number in the upper left hand corner is the
first-stage zero offset. The microprocessor samples the output at a predeter­mined rate.

####.## % H2 — N2
Zero adj:2048 C—Zero

The analyzer goes through C–Zero, F–Zero, and S–Zero. During C–Zero

and F–Zero, use the

ΔΔ

Δ∇ keys to adjust displayed Zero adj: value as close as

ΔΔ

possible to zero. Then, press Enter.

S–Zero starts. During S–Zero, the Microcontroller takes control as in Auto

Mode Zeroing, above. It calculates the differences between successive sam­plings and displays the rate of change as Slope= a value in parts per million per
second (ppm/s).

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4 Operation Model 2010A

####.## % H2 — N2
Slope=#.### S—Zero

Generally, you have a good zero when Slope is less than 0.05 ppm/s for
about 30 seconds.

Once zero settling completes, the information is stored in the analyzer’s
memory, and the instrument automatically returns to the Analyze mode.

4.4.1.3 Cell Failure

Cell failure in the 2010A is usually associated with inability to zero the
instrument with a reasonable voltage differential across the Wheatstone bridge. If
this should ever happen, the 2010A system alarm trips, and the VFD displays a
failure message.

Cell cannot be balanced
Check your zero gas

Before replacing the sensor:

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. Check temperature controller board.
e. Check gas temperature.

If none of the above as indicated, the sensor may need to be replaced.

Check warranty, and contact Analytical Instruments Customer Service.

4.4.2 Span Cal

The Span button on the front panel is used to span calibrate the analyzer.

Span calibration can be performed in either the automatic or manual mode.

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

application analyzers only), use manual mode
zeroing.

Make sure the span gas is flowing to the instrument.

4-14 Part I

If you want to calibrate ALL of the ranges at once
(multiple application analyzers only), use auto mode
spanning in the Cal Range.

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

4.4.2.1 Auto Mode Spanning

Observe all precautions in sections 4.4 and 4.4.2, above. Press Span to

enter the span function. The screen that appears allows you to select whether the
span calibration is to be performed automatically or manually. Use the

ΔΔ

Δ∇

ΔΔ

arrow keys to toggle between AUTO and MAN span settling. Stop when
AUTO appears, blinking, on the display.

Select span
mode: AUTO

Press Enter to move to the next screen.

Span Val: 2Ø.ØØ %
<ENT> To begin span

Use the < > arrow keys to toggle between the span concentration value

and the units field (%/ppm). Use the

ΔΔ

Δ∇ arrow keys change the value and/or the

ΔΔ

units, as necessary. When you have set the concentration of the span gas you are
using, press Enter to begin the Span calibration.

####.##% H2 — N2
Slope=#.### Span

The beginning span value is shown in the upper left corner of the display.

As the span reading settles, the screen displays and updates information on
Slope. Spanning automatically ends when the span output corresponds, within
tolerance, to the value of the span gas concentration. Then the instrument auto­matically returns to the analyze mode.

4.4.2.2 Manual Mode Spanning

Press Span to start the Span function. The screen that appears allows

you to select whether the span calibration is to be performed automatically or
manually.

Select span
mode: MANUAL

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

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

Span Val: 2Ø.ØØ %
<ENT> To begin span

Use the < > arrow keys to toggle between the span concentration value

and the units field (%/ppm). Use the

ΔΔ

Δ∇ arrow keys change the value and/or the

ΔΔ

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Part I 4-15

4 Operation Model 2010A

units, as necessary. When you have set the concentration of the span gas you are
using, press Enter to begin the Span calibration.

Press Enter to enter the span value into the system and begin the span

calibration.

Once the span has begun, the microprocessor samples the output at a
predetermined rate. It calculates the difference between successive samplings
and displays this difference as Slope on the screen. It takes several seconds for
the first Slope value to display. Slope indicates rate of change of the Span
reading. It is a sensitive indicator of stability.

####.##% H2 — N2
Slope=#.### Span

When the Span value displayed on the screen is sufficiently stable, press
Enter. (Generally, when the Span reading changes by 1 % or less of the range
being calibrated for a period of ten minutes it is sufficiently stable.) Once Enter
is pressed, the Span reading changes to the correct value. The instrument then
automatically enters the Analyze function.

4.5 The Alarms Function

The Model 2010A is equipped with 6 fully adjustable set points concentra­tion with two alarms and a system failure alarm relay. Each alarm relay has a set
of form “C" contacts rated for 3 amperes resistive load at 250 V ac. See Figure
in Chapter 3, Installation and/or the Interconnection Diagram included at the
back of this manual for relay terminal connections.

The system failure alarm has a fixed configuration described in chapter 3
Installation.

The concentration alarms can be configured from the front panel as either

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. The setpoints for the alarms are also established using this function.

Decide how your alarms should be configured. The choice will depend
upon your process. Consider the following four points:

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.

4-16 Part I

Decide whether you want the alarms to be set as:

Teledyne Analytical Instruments

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 non­alarm conditions.

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.)

If you are using password protection, you will need to enter your password

to access the alarm functions. Follow the instructions in section 4.3.3 to enter
your password. Once you have clearance to proceed, enter the Alarm function.

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

will automaticaly set the others.

Press the Alarm button on the front panel to enter the Alarm function.

Make sure that 01 is blinking.

Sel rng to set alm:
—> Ø1 Ø2 Ø3 <—

Set up the Range 1 alarm by moving the blinking over to 01 using the < >

arrow keys. Then press Enter. Check the gas application and range limits as
displayed on the screen.

Gas use: H2 — N2
Range: 0 — 10 %

Press enter again to set the alarm setpoints.

Sel %/ppm alm to set
AL1—PPM AL2—PPM

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4 Operation Model 2010A

Use the

move to the next screen.

Five parameters can be changed on this screen:

ΔΔ

Δ∇ keys to choose between % or ppm units. Then press Enter to

ΔΔ

AL1: 1ØØØ ppm HI
Dft:N Fs:N Ltch:N

• 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 Δ∇ arrow keys to
change the number. Holding down the key speeds up the
incrementing or decrementing.

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

blinking over to the desired parameter. Then use the Δ∇ 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 Δ two

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

–OR –

Go to Ltch– and then press either Δ two times or ∇ two times.
(Toggle it to N and back to Y.)

4.6 The Range Select Function

The Range function allows you to manually select the concentration 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) limits of each Range, and select a single, fixed range to run.

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 through­out the range. Furthermore, if the limits are too small
a part (approx 10 % or less) of the originally linear­ized range, the linearization will be compromised.

4-18 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

In the AUTO screen, you are further allowed to select which gas application

(PREVIOUSLY defined in System function) to run.

4.6.1 Manual (Select/Define Range) Screen

The Manual range-switching mode allows you to select a single, fixed
analysis range. It then allows you to redefine the upper and lower limits, for the
range.

Press Range key to start the Range function.

Select range
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 Δ∇ arrow keys to Select MANUAL, and
press Enter.

Select range to run
—> Ø1 Ø2 Ø3 CAL<—

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

Gas use: H2 — N2
Range: Ø — 10 %

Use the < > keys to toggle between the Range: low-end field and the
Range: high-end field. Use the

ΔΔ

Δ∇ keys to change the values of the fields.

ΔΔ

Press Escape to return to the previous screen to select or define another
range.

Press Enter to return the to the Analyze function.

4.6.2 Auto (Single Application) Screen

Autoranging will automaticaly set to the application that has at least two
range setup with the same gases.

In the autoranging mode, the microprocessor automatically responds to
concentration changes by switching ranges for optimum readout sensitivity. If the
upper limit of the operating range is reached, the instrument automatically shifts
to the next higher range. If the concentration falls to below 85% of full scale of

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Part I 4-19

4 Operation Model 2010A

the next lower range, the instrument switches to the lower range. A correspond­ing shift in the DC concentration output, and in the range ID outputs, will be
noticed.

The autoranging feature can be overridden so that analog output stays on a
fixed range regardless of the contaminant concentration detected. If the concen­tration exceeds the upper limit of the range, the DC output will saturate at 1 V dc
(20 mA at the current output).

However, the digital readout and the RS-232 output of the concentration
are unaffected by the fixed range. They continue to read beyond the full-scale
setting until amplifier saturation is reached. Below amplifier saturation, the
overrange readings are accurate UNLESS the application uses linearization over
the selected range.

The concentration ranges can be redefined using the Range function
Manual screen, and the application gases can be redefined using the System
function, if they are not already defined as necessary.

CAUTION: Redefining applications or ranges might require

relinearization and/or recalibration.

To setup automatic ranging:

Press Range key to start the Range function.

Select range
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 Δ∇ arrow keys to Select AUTO, and
press Enter.

Press Escape to return to the previous Analyze Function.

4-20 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

4.6.3 Precautions

The Model 2010A allows a great deal of flexibility in choosing ranges for
automatic range switching. However, there are some pitfalls that are to be
avoided.

Ranges that work well together are:

• 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.

Range schemes that are to be avoided include:

• Ranges that overlap

• Ranges whose limits are entirely within the span of an adjoining
range.

Figure 4-2 illustrates these schemes graphically.

Figure 4-2: Examples of Autoranging Schemes

4.7 The Analyze Function

Normally, all of the functions automatically switch back to the Analyze

function when they have completed their assigned operations. Pressing the

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Part I 4-21

4 Operation Model 2010A

Escape button in many cases also switches the analyzer back to the Analyze
function. Alternatively, you can press the Analyze button at any time to return
to analyzing your sample.

The Analyze function screen shows the impurity concentration and the

application gases in the first line, and the range in the second line. In the lower
right corner, the abbreviation Anlz indicates that the analyzer is in the Analyze
mode. If there is an * before the Anlz, it indicates that the range is linearized.

1.95 % H2 — N2
nR1:Ø —10 *Anlz

n indicates non inverting range
i indicates inverting range

If the concentration detected is overrange, the first line of the display blinks

continuously.

4.8 Programming

CAUTION: The programming functions of the Set Range and

Curve Algorithm screens are configured at the facto­ry to the users application specification. These func­tions should only be reprogrammed by trained,
qualified personnel.

To program, you must:

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

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.

OR

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.

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

4-22 Part I

CONTRAST AUTO—CAL
PWD LOGOUT MORE

Teledyne Analytical Instruments

Contrast Function is DISABLED

(Refer to Section 1.6)

Thermal Conductivity Analyzer Part I: Control Unit

MODEL APPLICATION
SELF_TEST ALGORITHM

Now you will be able to select the APPLICATION and ALGORITHM

set-up functions.

4.8.1 The Set Range Screen

The Set Range screen allows reprogramming of the three analysis ranges
and the calibration range (including impurity gas, background gas, low end of
range, high end of range, and % or ppm units). Original programming is usually
done at the factory according to the customer’s application. It must be done
through the RS-232 port using a computer running a terminal emulation program.

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.

Normally the Model 2010A is factory set to default to manual range
selection, unless it is ordered as a single-application multiple-range unit (in which
case it defaults to autoranging). In either case, autoranging or manual range
selection can be programmed by the user.

In the autoranging mode, the microprocessor automatically responds to
concentration changes by switching ranges for optimum readout sensitivity. If the
upper limit of the operating range is reached, the instrument automatically shifts
to the next higher range. If the concentration falls to below 85% of full scale of
the next lower range, the instrument switches to the lower range. A correspond­ing shift in the DC concentration output, and in the range ID outputs, will be
noticed.

The autoranging feature can be overridden so that analog output stays on a
fixed range regardless of the contaminant concentration detected. If the concen­tration exceeds the upper limit of the range, the DC output will saturate at 1 V dc
(20 mA at the current output).

However, the digital readout and the RS-232 output of the concentration
are unaffected by the fixed range. They continue to read beyond the full-scale
setting until amplifier saturation is reached. Below amplifier saturation, the
overrange readings are accurate UNLESS the application uses linearization over
the selected range.

To program the ranges, you must first perform the four steps indicated at
the beginning of section 4.8 Programming. You will then be in the second
System menu screen.

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4 Operation Model 2010A

MODEL APPLICATION
SELF_TEST ALGORITHM

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

and press Enter.

Sel rng to set appl:
—> Ø1 Ø2 Ø3 CAL <—

Use the Δ∇ arrow keys to increment/decrement the range number to 01,

02, 03, or CAL, and press Enter.

Imp: H2 Bck: N2
FR:Ø TO:1Ø %

Use the < > arrow keys to move to Imp: (impurity), Bck: (background),

FR: (from—lower end of range), TO: (to—upper end of range), and PPM or %.

Use the Δ∇ arrow keys to increment the respective parameters as desired.

Press Enter to accept the values and return to Analyze mode. (See note
below.) Repeat for each range you want to set.

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, and spans are always set in either percent or ppm units, as
selected by the operator, even though all concentration-data outputs change
from ppm to percent when the concentration is above 9999 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.

To end the session:

If started with the RS-232, send:

st<enter>
st<enter>

to the analyzer from the computer.

If started through the front panel, turn the instrument off and back on.
Press the Enter key twice to return to the Analyze mode.

4-24 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

4.8.2 The Curve Algorithm Screen

The Curve Algorithm is a linearization method. It provides from 1 to 9
intermediate points between the ZERO and SPAN values, which can be normal­ized during calibration, to ensure a straight-line input/output transfer function
through the analyzer.

Each range is linearized individually, as necessary, since each range will
usually have a totally different linearization requirement. Before setting the

algorithm curve, each range must be Zeroed and Spanned.

To linearize the ranges, you must first perform the four steps indicated at
the beginning of section 4.8 Programming. You will then be in the second
System menu screen.

MODEL APPLICATION
SELF_TEST ALGORITHM

4.8.2.1 Checking the linearization

From the System Function screen, select ALGORITHM, and press
Enter.

Sel rng set algo
—> Ø1 Ø2 Ø3 <—

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

Gas use: H2 — N2
Range: Ø -10 %

Press Enter again.

Algorithm setup:
VERIFY SETUP

Select and Enter VERIFY to check whether the linearization has been
accomplished satisfactorily.

Dpt INPUT OUTPUT
Ø Ø.ØØ Ø.ØØ

The leftmost digit (under Dpt) is the number of the data point being moni­tored. Use the Δ∇ keys to select the successive points.

The INPUT value is the input to the linearizer. It is the simulated output of
the analyzer. You do not need to actually flow gas.

The OUTPUT value is the output of the linearizer. It should be the ACTU-
AL concentration of the span gas being simulated.

Teledyne Analytical Instruments

Part I 4-25

4 Operation Model 2010A

If the OUTPUT value shown is not correct, the linearization must be correct-

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

Select algorithm
mode : AUTO

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

requires as many calibration gases as there will be correction points along the
curve. The user decides on the number of points, based on the precision re­quired.

The manual mode only requires entering the values for each correction
point into the microprocessor via the front panel buttons. Again, the number of
points required is determined by the user.

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

To linearize manually, you must have previous knowledge of the nonlinear
thermal-conductivity characteristics of your gases. You enter the value of the
differential between the actual concentration and the apparent concentration
(analyzer output). Analytical Instruments has tabular data of this type for a large
number of gases, which it makes available to customers on request. See Appen­dix for ordering information. To enter data:

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

The data entry screen resembles the verify screen, but the gas values can
be modified and the data-point number cannot. Use the < > keys to toggle
between the INPUT and OUTPUT fields. Use the Δ∇ keys to set the value for
the lowest concentration into the first point. Then press Enter.

4-26 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

After each point is entered, the data-point number increments to the next
point. Moving from the lowest to the highest concentration, use the Δ∇ keys to
set the proper values at each point.

Dpt INPUT OUTPUT
0 Ø.ØØ Ø.ØØ

Repeat the above procedure for each of the data points you are setting (up
to nine points: 0-8). Set the points in unit increments. Do not skip numbers. The
linearizer will automatically adjust for the number of points entered.

When you are done, Press ESCAPE. The message, Completed. Wait
for calculation, appears briefly, and then the main System screen returns.

To end the session:

If started with the RS-232, send:

st<enter>
st<enter>

to the analyzer from the computer.

If started through the front panel, turn the instrument off and back on.
Press the Enter key twice to return to the Analyze mode.

4.8.2.3 Auto Mode Linearization

To linearize in the Auto Mode, you must have on hand a separate calibra­tion gas for each of the data points you are going use in your linearization. First,
the analyzer is zeroed and spanned as usual. Then, each special calibration gas,
for each of the intermediate calibration points, is flowed, in turn, through the
sensor. As each gas flows, the differential value for that intermediate calibration
point is entered from the front panel of the analyzer.

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

range being analyzed.

Before starting linearization, perform a standard calibration. See section

4.4. To enter data:

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.

The Auto Linearize Mode data entry screen appears.

1.95 % H2 — N2
Input(Ø) :2.00

Teledyne Analytical Instruments

Part I 4-27

4 Operation Model 2010A

5. Use the Δ∇ 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.

To end the session:
If started with the RS-232, send:

st<enter>
st<enter>

to the analyzer from the computer.
If started through the front panel, turn the instrument off and back on.

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

4.9 Special Function Setup

4.9.1 Output Signal Reversal

Some applications require a reversal of the output signals in order for the
4-20mA and 0-1 V DC output signals to correspond with the low and high end
of the concentration range. For example, if an application involves the analysis
of 85% oxygen in a background of argon by measuring the thermal conductivity
of the binary gas, the analyzer would normally be set up so that the 100%
oxygen (0% argon) concentration would correspond to the zero level (4mA 0 V)
of the output signal. Then, 85% oxygen (15% argon) would correspond to
20mA (1 V) in the signal output.

It may be convenient for the user to have the outputs reversed so that the
85-100% oxygen level outputs a 4-20mA (0-1 V) signal respectively. This can
be accomplished by reversing the data input to the custom settings. Not all
applications will require a reversing function, however, if this is desirable, it must
be specified at the time of purchase or alternatively, by substituting a linearizing
PC board with the reversal information contained therein. Contact the factory
for further information.

4.9.2 Special - Inverting Output

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

for inverting.

The steps are:

1. Press RANGE key.

4-28 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

2. Use LEFT/RIGHT key to move to the range that is speci-

fied as inverting output.

3. Press and hold DOWN key for approximately 5 to 7 seconds.

4. Press ENTER key.

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

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

If more that one range is specified an inverting output, repeat steps 1

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.

If the analyzer indicates a negative concentration with proper span gas or

formula 1 indicates a negative value, set the S1 accordingly to the table below:

Close S1-5 range 1
Close S1-6 range 2
Close S1-7 range 3
Close S1-8 cal range

Press I/O to restart the system.

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 applica­tion.

The steps are as follows:

1. Set unit range to lowest range reading.

2. Using the computer generated settings for the controller,
adjust the controller settings for the maximum span gas

output.

3. Press SPAN key. Select AUTO mode and setup the setting
to span level. Press ENTER key to span.

4. Set range switch to next range.

5. Press SPAN key.

Teledyne Analytical Instruments

Part I 4-29

4 Operation Model 2010A

6. Press and hold the RIGHT key for approximate 5 to 7
seconds.

7. Select AUTO and set the reading to span gas level. Press
ENTER key.

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

4-30 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

Maintenance

5.1 Routine Maintenance

Aside from normal cleaning and checking for leaks at the gas connec­tions, 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

0OK
1 5 V Failure
2 15 V Failure
3 Both Failed

Analog

0OK
1 DAC A (0–1 V Concentration)
2 DAC B (0–1 V Range ID)
3 Both Failed

(Continued)

Teledyne Analytical Instruments

Part I 5-1

5 Maintenance Model 2010A

Preamp

0OK
1 Zero too high
2 Amplifier output doesn't match test input
3 Both Failed

>3 Call factory for information

Cell

0OK
1 Failed (open filament, short to ground, no

power.)

2 Unbalance (deterioration of filaments, blocked

tube)

5.3 VFDD 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

1. Place small screwdriver in notch, and pry cover off, as shown in
Figure 5-1.

5-2 Part I

Figure 5-1: Removing Fuse Block from Housing

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part I: Control Unit

2. To change between American and European fuses, remove the
single retaining screw, flip Fuse Block over 180 degrees, and
replace screw.

3. Replace fuse as shown in Figure 5-2.

4. Reassemble Housing as shown in Figure 5-1.

American Fuses European Fuses

Figure 5-2: Installing Fuses

5.5 Major Internal Components

The Cell Compartment and Front Panel PCBs are accessed by unlatch­ing and swinging open the front panel, as described earlier. The balance of
the PCBs are accessed by removing the rear panel retaining screws and
sliding out the entire subassembly. See Figure 5-3, below. The major elec­tronic components locations are shown in Figure 5-4 (with Cell Compart­ment removed for clarity).

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS

MANUAL.

The 2010A Control Unit contains the following major components:

• Power Supply

• Preamp and Motherboard with Microcontroller

• Display Board and Displays
5 digit LED meter
2 line, 20 character, alphanumeric, VFD

• Rear Panel Board.

Teledyne Analytical Instruments

Part I 5-3

5 Maintenance Model 2010A

X

X

Figure 5-3: Rear Panel Retaining Screws

To detach the rear panel, remove only those screws marked with an X.

Front Panel

Display Board

X

X

Universal

Pow er Supply

Figure 5-4: Locations of Printed Circuit Board Assemblies

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

for details.

5-4 Part I

Teledyne Analytical Instruments

Pream plifier

PCB

Slide-out
Electronics
Assembly

Motherboard

Thermal Conductivity Analyzer Part I: Control Unit

5.6 Cleaning

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

Customer Service: [phone]

Environmental Health and Safety: [phone], Extension 1592

Fax: [phone]

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

PIN # 1858192

Teledyne Analytical Instruments

Part I 5-5

5 Maintenance Model 2010A

5-6 Part I

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Appendix

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

constant temperature
±5% of full scale over operating temperature

range once temperature equilibrium has been
reached

Response Time: 90% in less than 50 seconds

System Operating

Temperature: 32°F to 122°F (0 - 50°C)

Sensor Type: Standard TC cell (4-filament detector)

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

Two 4-20 mADC isolated (concentration and
range ID)

Alarm: Two fully programmable concentration alarm

set points and corresponding Form C, 3 amp
contacts.

One system failure alarm contact to detect
power, calibration, zero / span and sensor
failure.

Teledyne Analytical Instruments

A-1

Appendix Models 2010A

System Power

Requirements: 110 VAC, 50-60Hz

Dimensions: 7.5”H x 10.8 “w X 13.7”D

Cell Material: Nickel plated brass block with nickel alloy

filaments and stainless steel and plates

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

Tracs Command

Mounting:

Standard: General purpose flush panel mounting

Options: General purpose relay rack mounted to con-

tain either one or two in a 19” relay rack
mountable plate

* Other configurations, including a totally

explosion-proof, are available

A-2

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Appendix

A-2 Recommended 2-Year Spare Parts List

Qty Part Number Description

1 C62374 Back Panel Board
1 C62371A Front Panel Board
1 C65098 Preamplifier Board
1 C73870D Main Computer Board
1 C69535A Temp Control Board for 220 VAC
1 C69535B Temp Control Board for 110 VAC
1* F9 Fuse, 1 A, 250 V, 3AG, Slow Blow, (US)
2* F1275 Fuse, 1 A, 250 V, 5 × 20 mm, T—Slow Blow, (European)
1 R1460 Molex Connector for Remote Probe
1 T976 Molex Crimp Terminals for Remote Probe Connector

_____________________

* 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 instrument for
which the parts are intended.

Orders should be sent to:

TELEDYNE Analytical Instruments

16830 Chestnut Street
City of Industry, CA 91749-1580

Phone [phone], Fax [phone]
TWX [phone] TDYANYL COID

Web: www.teledyne-ai.com
or your local representative.

Teledyne Analytical Instruments

A-3

Appendix Models 2010A

A-3 Drawing List

D-67061: Outline Drawing (standard unit with optional sealed ref.)
D-67056: Outline Drawing (with optional gas selector panel and/or sealed

ref.)
B-67057: Piping Diagram
D-66922: Wiring Diagram / Interconnect Drawing
D-70231 Interconnection Diagram

A-4

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Appendix

CALIBRATION PROCEDURE FOR Models 2000 & 2010 ANALYZER

For TURBINE GENERATOR APPLICATION

The ranges for this analyzer are:

Range 1: 0-100% Air in CO2
Range 2: 0-100% H2 in CO2
Range 3: 80-100% H2 in Air

Cal Range: 0-20% N2-H2

The following instructions show how to calibrate each range in the analyzer
independently. If all ranges must be calibrated using the Cal range, go to the cal
range calibration section and following the instructions.

CALIBRATE RANGE 1

1 Select the RANGE function on the main menu and place the analyzer in Range

1. DO THIS, EVEN IF ANALYZER IS IN RANGE 1.

2 Feed zero gas to analyzer and purge for the time needed to get readings that are

leveled. Feed CO2 to the analyzer

3 Press ZERO. You have the option to select AUTO or MANual. AUTO lets the

analyzer adjust itself and may take longer while in MANual mode the operator
has to adjust the zero reading on the display manually using the Up and Down
arrows.

4 Press ZERO select manual press the arrow > hold until OK is displayed in the

upper right corner of the VFD display.

5 If you choose manual, you first will do the Coarse zero adjustment using the Up

and Down arrows. Adjust until display reads as close to zero as you can then
press Enter. Now do the Fine zero adjustment using the Up and Down arrows
until the display reads as close to zero as possible then press Enter. Now the
analyzer will do the final step which is the Software zero adjustment. No input
is required and the analyzer will return automatically to the Analyze mode when
done.

6 When the analyzer finishes the zero, feed the span gas and purge for the time

needed to get readings that are leveled. Feed Air to the analyzer

Teledyne Analytical Instruments

A-5

Appendix Models 2010A

7 Press the SPAN button, press the arrow > hold it until OK appears on the upper

right corner of the VFD display.

8 You have the option to select AUTO or MANual. AUTO lets the analyzer

adjust itself and may take longer while in MANual mode the operator has only
to press Enter when he thinks the reading is stable enough. Set the Span value
to 100.00%.

9 The analyzer should end the span by itself if AUTO was selected or when you

press the Enter button if MANual was selected.

10 This range is now calibrated.

CALIBRATE RANGE 2

1 Select the RANGE function on the main menu and place the analyzer in Range

2. DO THIS, EVEN IF ANALYZER IS IN RANGE 2.

2 Feed zero gas to analyzer and purge for the time needed to get readings that are

leveled. Feed CO2 to the analyzer

3 Press ZERO. You have the option to select AUTO or MANual. AUTO lets the

analyzer adjust itself and may take longer while in MANual mode the operator
has to adjust the zero reading on the display manually using the Up and Down
button.

4 Press ZERO select manual press the arrow > hold until OK is displayed in the

upper right corner of the VFD display.

5 If you choose manual, you first will do the Coarse zero adjustment using the Up

and Down arrows. Adjust until display reads as close to zero as you can then
press Enter. Now do the Fine zero adjustment using the Up and Down arrows
until the display reads as close to zero as possible then press Enter. Now the
analyzer will do the final step which is the Software zero adjustment. No input
is required and the analyzer will return automatically to the Analyze mode when
done.

A-6

.

Feed H2 to the analyzer

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Appendix

6 When the analyzer finishes the zero, feed the span gas and purge for the time

needed to get readings that are leveled. Feed H2 to the analyzer.

7 Press the SPAN button, press the arrow > hold it until OK appears on the upper

right of the VFD display.

8 You have the option to select AUTO or MANual. AUTO lets the analyzer

adjust itself and may take longer while in MANual mode the operator has only
to press Enter when he thinks the reading is stable enough. Set the Span value
to 100.00%.

9 The analyzer should end the span by itself if AUTO was selected or when you

press the Enter button if MANual was selected.

10 This range is now calibrated.

CALIBRATE RANGE 3

1 Select the RANGE function on the main menu and place the analyzer in Range

3. DO THIS, EVEN IF ANALYZER IS IN RANGE 3.

2 Feed zero gas to analyzer and purge for the time needed to get readings that are

leveled. Feed H2 to the analyzer

3 Press ZERO. You have the option to select AUTO or MANual. AUTO lets the

analyzer adjust itself and may take longer while in MANual mode the operator
has to adjust the 100% reading on the display manually using the Up and Down
button.

4 Press ZERO select MANual, press arrow > hold until OK is displayed in the

upper right corner of the VFD display.

5 you choose manual, you first will do the Coarse zero adjustment using the Up

and Down arrows. Adjust until display reads as close to 100.00% as you can
then press Enter. Now do the Fine zero adjustment using the Up and Down
button until the display reads as close to 100.00% as possible then press Enter.

Teledyne Analytical Instruments

A-7

Appendix Models 2010A

Now the analyzer will do the final step which is the Software zero adjustment.
No input is required and the analyzer will return automatically to the Analyze
mode when done.

6 When the analyzer finishes zero, feed span gas and purge for the time needed

to get readings that are leveled. Feed 90% H2 in air to the analyzer.

7 Press the SPAN button, press the arrow > hold until OK appears on the upper

right corner of the VFD display.

8 You have the option to select AUTO or MANual. AUTO lets the analyzer

adjust itself and may take longer while in MANual mode the operator has only
to press Enter when he thinks the reading is stable enough. Set the Span value
to 80.00%.

9 The analyzer should end the span by itself if AUTO was selected or when you

press the Enter switch if MANual was selected.

10 This range is now calibrated.

CALIBRATE CAL RANGE

1 Select the RANGE function on the main menu and place the analyzer in the Cal

Range.

2 Feed zero gas to analyzer and purge for the time needed to get readings that are

leveled. Feed H2 to the analyzer

3 Now select the ZERO function from the main menu and press Enter.

If you want to calibrate only the Cal Range:
select MANual.
If you want to calibrate all ranges:
select AUTO.

A-8

4 If you choose manual, you first will do the Coarse zero adjustment using the Up

and Down arrows. Adjust until display reads as close to zero as you can then
press Enter. Now do the Fine zero adjustment using the Up and Down button
until the display reads as close to zero as possible then press Enter. Now the
analyzer will do the final step which is the Software zero adjustment.

Teledyne Analytical Instruments

Thermal Conductivity Analyzer Appendix

7.0 CALIBRATION PROCEDURE FOR Models 2000 & 2010 ANALYZER
For TURBINE GENERATOR APPLICATION

7.1 The ranges for this analyzer are:

Range 1: 0-100% Air in CO2
Range 2: 0-100% H2 in CO2
Range 3: 80-100% H2 in Air

Cal Range: 0-20% N2-H2

7.2 The following instructions show how to calibrate each range in the analyzer

independently. If all ranges must be calibrated using the Cal range, go to the cal
range calibration section and following the instructions.

STEP ACTION AT ANALYZER GAS TO
FEED

CALIBRATE RANGE 1

1

Select the RANGE function on the main menu and place the analyzer in Range 1.
DO THIS, EVEN IF ANALYZER IS IN RANGE 1.

2
Feed zero gas to analyzer and purge for the time needed to get readings that are

leveled.

Feed CO2 to the analyzer

3

Press ZERO. You have the option to select AUTO or MANual. AUTO lets the
analyzer adjust itself and may take longer while in MANual mode the operator has to adjust
the zero reading on the display manually using the Up and Down arrows.

4

Press ZERO select manual press the arrow > hold until OK is displayed in the upper
right corner of the VFD display.

5

If you choose manual, you first will do the Coarse zero adjustment using the Up and
Down arrows. Adjust until display reads as close to zero as you can then press Enter.
Now do the Fine zero adjustment using the Up and Down arrows until the display reads as

Teledyne Analytical Instruments

A-9

Appendix Models 2010A

Now the analyzer will do the final step which is the Software zero adjustment.
No input is required and the analyzer will return automatically to the Analyze
mode when done.

5 When the analyzer finishes the zero, feed the span gas and purge for the time

needed to get readings that are leveled. Feed 10% Air in H2 (90% H2 in air)

to the analyzer

6 Now select the SPAN function from the main menu and press Enter.

If you want to calibrate only the Cal Range:
select MANual.
If you want to calibrate all ranges:
select AUTO.

Set the span value to 20.0%.

7 The analyzer should end the span by itself if AUTO was selected or when you

press the Enter if MANual was selected.

8 This range is now calibrated, and if it was AUTO calibrated, all ranges have

been calibrated.

A-10

Teledyne Analytical Instruments

Part II: Analysis Unit

OPERATING INSTRUCTIONS

Model 2010A

Thermal Conductivity Analyzer

Part II: Analysis Unit

NEC Type

Part Number D-70089

Teledyne Analytical Instruments Part II: i

Model 2010A 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

ii: Part II T eledyne Analytical Instruments

Thermal Conductivity Analyzer Part II: Analysis Unit

Introduction

1.1 Overview

The Analytical Instruments Model 2010A Analysis Unit is a versatile
remotely controlled instrument for measuring a component gas in a back­ground 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 2010A 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 de­scribed 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 2010A 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 refer­ence 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.

Teledyne Analytical Instruments Part II: 1-1

1 Introduction Model 2010A

Figure 1-1: Outline Diagram of 2010A 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
Maintenance chapters, as appropriate.

1-2: Part II Teledyne Analytical Instruments

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 termi­nals.

• Voltage Selector 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 Terminals that provide all electrical intercon-

nections from the Control Unit to the gas
control valves.

• Sensor Signal Terminals that provide connections from the

T/C sensor to the Control Unit.

Teledyne Analytical Instruments Part II: 1-3

1 Introduction Model 2010A

1-4: Part II Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part II: Analysis Unit

Installation

Installation of the Model 2010A 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 2010A 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 dimen­sions 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 9.4 inches

from the base on which it is mounted. Enough clearance is
required in front of the cover to allow the cover to be re­moved.

Figure 3-1 is a view with the cover removed showing the external Gas
Connector Panel and the internal Electrical Connector Panel.

Teledyne Analytical Instruments Part II: 2-1

2 Installation Model 2010A

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 avail­able at additional cost . These panels are designed to substitute a standard
front panel.

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 2010A electron­ics. 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 sample­line lag time.

NOTE: 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 input should be reasonably well regulated. Pressures
between .35 and 3.5 bar (5- 51 psig) are acceptable - .7 bar (10 psig) is
normal as long as the pressure, once established, will keep the flow con-
stant during analysis and within 50-200cc/min (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 particu­larly 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

Teledyne Analytical Instruments Part II: 2-3

2 Installation Model 2010A

vented to the same area, both VENT lines must vent to areas with equal
ambient pressures, and pressures must vary no more than the normal baro­metric changes.

2-6 SAMPLE Gas

In the standard model, sample and calibration gases are introduced
through the
with appropriate valves.

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 mini­mize 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.

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

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
good results.

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.

2-4: Part II Teledyne Analytical Instruments

Thermal Conductivity Analyzer Part II: Analysis Unit

2-8 ZERO Gas

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 70­100 % 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 ATMO­SPHERE. THE AREA MUST BE DECLARED TEMPORARILY SAFE
BY THE PROPER AUTHORITY FIRST.

Teledyne Analytical Instruments Part II: 2-5

2 Installation Model 2010A

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

If you use your own gas control valves, use the interconnect diagram in
Figure 3-5 for the valves. The sensor and thermistor remain connected as in
Figure 3-4, above. (See drawing D-70231 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, de­pending on the load impedance applied. See Figure 3-6.

2-6: Part II Teledyne Analytical Instruments

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-70731 interconnection diagram. The maximum interconnection distances
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 intercon­nection diagram for wire gages and distances which will meet this require­ment.

The second issue is one of signal quality. At greater distances prob­lems associated with signal degradation increases. Signal degradation prob­lems 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,

Teledyne Analytical Instruments Part II: 2-7

2 Installation Model 2010A

the system is ready to test. Before plugging either of the units into their
respective power sources:

• 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.

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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

0OK
1 5 V Failure

Teledyne Analytical Instruments Part II: 3-1

3 Operation Model 2010A

2 15 V Failure
3 Both Failed

Analog

0OK
1 DAC A (0–1 V Concentration)
2 DAC B (0–1 V Range ID)
3 Both Failed

Preamp

0OK
1 Zero too high
2 Amplifier output doesn't match test input
3 Both Failed

The results screen alternates for a time with:

Press Any Key
To Continue...

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.

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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, routine maintenance is limited to recalibration.

Self-diagnostic testing of the system and fuse replacement in the Con­trol 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 2010A Analysis Unit contains the following major components:

• TC Cell

• Optional Auto-Cal Solenoid Assy.

• Heater Assembly

• Electrical Connector Panel

• Gas Connector Panel (external)

See the drawings in the Drawings section in back of this manual
for details.

Teledyne Analytical Instruments Part II: 4-1

4 Maintenance Model 2010A

Figure 4-1: Major Components

4.3 Fuse Replacement

The 2010A 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

Teledyne Analytical Instruments

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

0OK
1 5 V Failure
2 15 V Failure
3 Both Failed

Analog

0OK
1 DAC A (0–1 V Concentration)
2 DAC B (0–1 V Range ID)
3 Both Failed

Preamp

0OK
1 Zero too high
2 Amplifier output doesn't match test input
3 Both Failed

Teledyne Analytical Instruments Part II: 4-3

4 Maintenance Model 2010A

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
the customer interface.

4.5.1 Removing the Cell Compartment

WARNING: IF THE MODEL 2010A ANALYZER HAS BEEN USED

WITH TOXIC GASES, FLUSH IT THOROUGHLY
BEFORE PERFORMING THIS PROCEDURE.

WARNING: DISCONNECT ALL POWER TO THE MODEL 2010A

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

disconnecting any plumbing.

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

interface cover panel.

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

the 1st interface PCB.

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

2nd interface 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 2nd PCB. 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
analysis unit.

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

prior to returning the unit to service.

4-4: Part II

Teledyne Analytical Instruments