Teledyne 2120 User manual

OPERATING INSTRUCTIONS FOR

Model 2120

Trace Nitrogen in Argon Analyzer

P/N MXXXX

ECO:

DANGER

This instrument is for analyzing nitrogen in argon only.

Do not introduce any flammable or toxic gases into this instrument.

Hazardous voltages exist on certain components internally which may be

lethal. Disconnect power before servicing.

Only authorized personnel should conduct maintenance and/or servicing.

Before conducting any maintenance or servicing, consult with authorized

supervisor/manager.

Teledyne Analytical Instruments

Model 2120

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 acknowledgements 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 specifically 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

Trace Nitrogen in Argon Analyzer

Safety Messages

Your safety and the safety of others is very important. We have

provided many important safety messages in this manual. Please read

these messages carefully.

A safety message alerts you to potential hazards that could hurt you

or others. Each safety message is associated with a safety alert symbol.

These symbols are found in the manual and inside the instrument. The

definition of these symbols is described below:

GENERAL WARNING/CAUTION: Refer to the instructions

for details on the specific danger. These cautions warn of

specific procedures which if not followed could cause bodily

Injury and/or damage the instrument.

CAUTION: HOT SURFACE WARNING: This warning is

specific to heated components within the instrument. Failure

to heed the warning could result in serious burns to skin and

underlying tissue.

WARNING: ELECTRICAL SHOCK HAZARD: Dangerous

voltages appear within this instrument. This warning is

specific to an electrical hazard existing at or nearby the

component or procedure under discussion. Failure to heed this

warning could result in injury and/or death from

electrocution.

Technician Symbol: All operations marked with this symbol

are to be performed by qualified maintenance personnel only.

NOTE: Additional information and comments regarding a

specific component or procedure are highlighted in the form

of a note.

No

Symbol

CAUTION: THE ANALYZER SHOULD ONLY BE USED ONLY

FOR THE PURPOSE AND IN THE MANNER

DESCRIBED IN THIS MANUAL.

Teledyne Analytical Instruments iii

Model 2120

IF YOU USE THE ANALYZER IN A MANNER OTHER

THAN THAT FOR WHICH IT WAS INTENDED,

UNPREDICTABLE BEHAVIOR COULD RESULT

POSSIBLY ACCOMPANIED WITH HAZARDOUS

CONSEQUENCES.

This manual provides information designed to guide you through

the installation, calibration operation and maintenance of your new

analyzer. Please read this manual and keep it available.

Occasionally, some instruments are customized for a particular

application or features and/or options added per customer requests.

Please check the front of this manual for any additional information in

the form of an Addendum which discusses specific information,

procedures, cautions and warnings that may be peculiar to your

instrument.

Manuals do get lost. Additional manuals can be obtained from

Teledyne at the address given in the Appendix. Some of our manuals are

available in electronic form via the internet. Please visit our website at:

www.teledyne-ai.com.

iv Teledyne Analytical Instruments

Trace Nitrogen in Argon Analyzer

Table of Contents

List of Figures............................................................................. viii

List of Tables ................................................................................ ix

Introduction ................................................................................... 1

1.1 Overview 1

1.2 Typical Applications 1

1.3 Features 2

1.4 Front Panel 3

1.5 Rear Panel 4

1.6 Internal Components 6

1.7 Additional Safety Information 8

1.7.1 Emergency Procedures 9

1.7.2 Basic Safety Requirements 10

1.7.3 Precautionary Labels 10

1.7.4 Summary of Known Hazards 11

1.7.4.1 Electrocution 11

1.7.4.2 Pressure 11

1.7.4.3 Purging 12

1.7.4.4 Safe Repair Procedures 12

1.7.4.5 General Precautions for Handling and Storing

High Pressure Gas Cylinders 13

Operational Theory ..................................................................... 15

2.1 The Analyzer 15

2.2 Overrange Protection 16

2.3 Sample System 16

Installation ...................................................................................19

3.1 Unpacking the Instrument 19

Teledyne Analytical Instruments v

Model 2120

3.2 Choosing a Location 20

3.3 Mounting 20

3.4 Electrical Connections 21

3.5 Gas Connections 22

3.5.1 Typical Sample System 23

3.5.2 Gas Connections to the Instrument 25

3.6 Purging 25

3.7 Calibration 26

3.8 Installation Checklist 27

Operation ..................................................................................... 29

4.1 Powering Up the Analyzer 30

4.2 Zero and Span Calibration 31

4.2.1 Before Calibration 31

4.2.2 Recommended Calibration Gases 31

4.2.3 Calibration Steps 32

4.3 Reading and Recording Data 33

4.4 Overrange Protection Circuit 34

Maintenance ................................................................................ 37

5.1 Routine Maintenance 37

5.2 Routine Maintenance Schedule 37

5.3 Troubleshooting 38

5.4 Parts Replacement and Testing Guide 41

5.4.1 Voltage Selection and Fuse Changing 42

5.4.2 Optical Filter 43

5.4.3 Low Flow Switch 44

5.4.4 Control Relay 44

5.4.5 Analytical Cell 45

5.4.6 Photomultiplier Tube 46

5.4.7 High Voltage Plate Adjustment 47

5.4.8 High Voltage Transformer 47

5.4.9 Amplifier Board 48

5.4.10 Hamamatsu PMT High Voltage Supply 48

vi Teledyne Analytical Instruments

Trace Nitrogen in Argon Analyzer

5.4.11 Low Voltage DC Supply Board 49

5.4.12 Regulated 255 Hz Power Supply 49

5.4.13 Digital Panel Meter 49

5.4.14 Zero and Span Potentiometers 50

Appendix ...................................................................................... 51

A.1 Specifications 51

A.2 Recommended Replacement Parts List 52

A.3 Sample Equipment Calibration Log Form 53

Index.............................................................................................55

Teledyne Analytical Instruments vii

Model 2120

List of Figures

Figure 1-1 Model 2120 Front Panel.................................................3

Figure 1-2: Model 2120 Rear Panel................................................5

Figure 1-3: Internal Component Identification .................................6

Figure 1-4: Internal Components in Card Cage...............................8

Figure 2-1 Block Diagram for the Model 2120 Analyzer................16

Figure 3-1: Analyzer Dimensions..................................................21

Figure 3-2: Electrical Connections ................................................22

Figure 3-3: Suggested Sample System.........................................23

Figure 5-1: Power Entry Module....................................................42

Figure 5-2: The Analytical Cell......................................................45

viii Teledyne Analytical Instruments

Trace Nitrogen in Argon Analyzer

List of Tables

Table 5-1: Routine Maintenance Schedule....................................38

Table 5-2: Troubleshooting............................................................39

Teledyne Analytical Instruments ix

Model 2120

DANGER

COMBUSTIBLE GAS USAGE

WARNING

This is a general purpose instrument designed for use in a

non-hazardous area. It is the customer's responsibility to

ensure safety especially when combustible gases are

present since the potential of gas leaks always exist.

Never introduce gases other than argon into the analyzer. If

explosive, flammable, or corrosive gases or gas mixtures are

allowed to flow into the analyzer, fire or explosion can result.

To avoid serious injury, read all precautionary labels

attached to equipment, cylinders, containers, and boxes

prior to start-up.

Labels attached in appropriate areas of the analyzer warn

you of inherent hazards associated with the system. For

personal safety, read the labels and perform directed

precautions before handling the equipment.

The customer should ensure that the principles of operating

this equipment are well understood by the user. Misuse of

this product in any manner, tampering with its components,

or unauthorized substitution of any component may

adversely affect the safety of this instrument.

Since the use of this instrument is beyond the control of

Teledyne Instruments/ Analytical Instruments, referred as

TI/AI, no responsibility by TI/AI, its affiliates, and agents for

damage or injury from misuse or neglect of this equipment is

implied or assumed.

x Teledyne Analytical Instruments

Trace Nitrogen in Argon Analyzer Introduction

Introduction

1.1 Overview

This manual describes installation, operation and maintenance for

the Model 2120 Trace Nitrogen in Argon Gas Analyzer. Section 1

describes the analyzer in general terms and provides additional safety

information pertinent to the proper operation of the instrument.

The Teledyne Model 2120 Trace Nitrogen in Argon Gas Analyzer

is a robust analytical tool for measuring trace amounts of nitrogen in

argon. There are two separate instruments in the 2120 series to cover

different analytical ranges:

Series 2120-A (115 V) 0-2 and 0-20 ppm

Series 2120-B (115 V) 0-20 and 0-200 ppm

For enhanced sensitivity extending to 10 ppb, the Model 2120

employs a photomultiplier tube (PMT) to optically distinguish the

spectrum generated from an ionized sample gas oscillating at a specific

frequency in the analytical cell. Using precise optical filtering, single

line emission characteristic of nitrogen is produced with an intensity

proportional to the nitrogen concentration. The nitrogen concentration is

displayed on the front panel display meter and an analog output signal is

available at the rear panel.

The system is easy to operate with all controls and indicators

mounted on the front panel. Overrange protection alarm, low flow

alarm, convenient test jack panel are just a few of the many features

included on the standard Model 2120 instrument.

1.2 Typical Applications

The Model 2120 Trace Nitrogen in Argon Gas Analyzer is used in

a wide range of applications including:

• Air separation plants

• Argon Purification Plants

Teledyne Analytical Instruments 1

Introduction Model 2120

• Specialty Gas Laboratories

• Specialty Steel Manufacturing

• Gas Management/Monitoring Systems

• Quality Control for Truck Fills & Gas Cylinders

• Process Control

• New Line Certification

• Chemical Plants

• Welding Gas Management

• Semiconductor Manufacturing

1.3 Features

The Model 2120 comes equipped with the following standard

features:

• Digital Panel Meter—convenient and immediate display of the

current sample analysis.

• Indicator lights—front panel mounted LEDs provide instrument

status information at a glance.

• Overrange Protection—alarm contacts and LED.

• Range ID Contacts—outputs for range identification.

• Range Switch—allows for convenient switching between

analysis ranges from the front panel.

• Zero and Span Controls—front panel mounted controls for

calibration.

• PMT Voltage Adjustment Potentiometer—voltage adjustment

for photomultiplier tube.

• Sample Flow Rotameter—for monitoring sample flow through

the analytical cell.

• VCR Fitting—sample-in port connection fitting designed for

leak-free sample delivery and analysis at trace levels.

• Optical Filter—optical filters for wavelength of impurity

emission.

2 Teledyne Analytical Instruments

Trace Nitrogen in Argon Analyzer Introduction

• Low Flow Switch—cuts power to the ionizer if the sample flow

falls below a setpoint.

1.4 Front Panel

Operator controls and displays are located on the front panel as

shown in Figure 1-1.

Figure 1-1 Model 2120 Front Panel

• Status Indicator Lights:

• Ionizer Light —Illuminates when the 255 Hz power

supply is operational and its output is being supplied to

the switching relay.

• Power Light— Illuminates when main power switch is

on and the fuse is good. Switch and fuse are both

located in the power entry module on the back of the

analyzer.

• On-Line Light—Illuminates when ionizing voltage is

applied to the analytical cell. The analyzer requires a

sample flow of at least 0.2 cfh (100 ccpm) for the

analytical cell to come on line.

• Low Flow Light— Illuminates when flow to the

analyzer is less than 0.2 cfh (100 ccpm). When this

occurs the ON-LINE light will be off indicating that no

ionizing voltage is being applied to the analytical cell.

• Overrange Alarm Light— Illuminates when discharge

brightness deteriorates due to an unusually high level

of impurity in the sample gas.

Teledyne Analytical Instruments 3

Introduction Model 2120

CAUTION: THE DISPLAY METER INDICATES A LOW LEVEL

IMPURITY ANALYSIS WHILE IN THIS MODE. THIS IS

NOT THE ACTUAL NITROGEN CONCENTRATION.

• Range Switch: Used to select the measurement range maximum

ppm.

• Digital Panel Meter (DPM) — Displays the nitrogen

content of the sample stream in ppm.

Note: When there is no sample flow or there is a loss of

ionization voltage, or when the impurities are out of range

(i.e. , > 2 ppm in the 2 range, > 20 ppm in the 20 range,

and > 200 ppm in the 200 range), the DPM displays "1"

(the number one with a decimal point and no additional

digits). The maximum number the meter reads before it

goes to "1" is 1.999 in the 2 ppm range, 19.99 in the 20

ppm range, or 199 99 in the 200 ppm range.

• Zero Potentiometer: Used for calibration with zero gas.

• Span Potentiometer: Used for calibration with span gas.

• Sample Flow Rotameter: Monitors flow rate of gas to the

analytical cell.

1.5 Rear Panel

Connections and other controls are located on the rear panel of the

analyzer, as shown in Figure 1-2. This includes:

• Power Entry Module — Main power on/off function, connector

for input power cable, and fuse holder for the analyzer. This

module protects the analyzer from input power surges and the

power supply from short circuits.

• Sample Input Port — 1/4-in (0.64 cm) VCR fitting marked

INPUT. This fitting is used to connect the sample inlet line to

the analyzer.

4 Teledyne Analytical Instruments

Trace Nitrogen in Argon Analyzer Introduction

Figure 1-2: Model 2120 Rear Panel

• Recorder Contacts — A standard barrier terminal connection is

installed for connecting a recorder or other external meter to the

analyzer.

• Test Point Contacts —Provides an mVDC output signal

connector for a DC multimeter and is used during calibration.

• Overrange Alarm Contacts* — Normally open and normally

closed dry contacts for indication of impurities at levels too

high for analyzer's range of detection. Rated for 0.5 A at 30

VAC.

• Range Identification Contacts* — These contacts are closed

when the lower range is selected on the front panel of the

analyzer and open for the high range. Rated for 2 A at 30

VAC.

• Sample Vent Port — 1/4-in (0.64 cm) Swagelok compression

fitting marked VENT. Used to connect the sample outlet line to

the vent system.

• 1 P28 Plate Adjustment — A 10-turn, 10 K variable plate

voltage adjustment for the high voltage applied to the plates of

the PMT by the high-voltage DC power supply.

• Identification Plate — This plate identifies the model #, serial

#, range, etc.

• Test Points — Test jacks are installed to test the voltage outputs

of the amplifier board, the low-voltage power supply, and the

255 Hz power supply.

*Note: A fuse must be used for any circuit attached to the

overrange alarm or range indication contacts

.

Teledyne Analytical Instruments 5

Introduction Model 2120

1.6 Internal Components

The internal components can be accessed by removing the top

cover of the analyzer. Figure 1-3 shows an inside view of the analyzer

and identifies specific components of the analyzer. See also Figure 1-4

for internal components inside the card cage.

Figure 1-3: Internal Component Identification

WARNING: HIGH VOLTAGE. ELECTROCUTION HAZARD.

UNPLUG THE ANALYZER BEFORE REMOVING THE

COVER. THE OUTPUT OF THE HIGH-VOLTAGE

TRANSFORMER AND THE ANALYTICAL CELL

ELECTRODES CAN APPROACH VOLTAGES OF

10,000 VAC. THE ANALYZER SHOULD BE SERVICED

ONLY BY A QUALIFIED SERVICE TECHNICIAN.

6 Teledyne Analytical Instruments

Trace Nitrogen in Argon Analyzer Introduction

The following list is keyed to Figure 1-3 and serves to identify and

briefly describe the function of various internal components of the

Model 2120 analyzer.

1. Card Cage for PCB's — Contains the amplifier board, 4-20

mA conversion board, test point jacks. The interface board is on

rear of cage.

2. PMT Cover —Shields the PMT for noise reduction and

protects it from atmospheric impurities.

3. Hamamatsu PMT Socket — The socket contains the high

voltage supply for the PMT, the resistor ladder for the intermediate

dynodes in the PMT, and a 1.22 VDC reference voltage generator.

4. Control Relay — Controls the high voltage transformer.

5. Digital Panel Meter—Displays the nitrogen content of the

sample stream in parts-per-million (ppm).

6. Sample Vent Port — 1/4-in (0 64-cm) Swagelok

compression

fitting marked VENT. Used to connect the sample outlet line to

the vent system.

7. Analytical Cell — Cell through which an argon sample stream

passes at flow rate.

8. Sample Input Port With Flow Control Orifice — 1/4-in

(0.64-cm) VCR fitting marked INPUT Used to connect the

sample inlet line to the analyzer. Sample flow is controlled by

an internal orifice at this input.

9. Power Entry Module — Main power on/off function,

connector for input power cable, and fuse holder for the

analyzer. Protects analyzer from input power surges and power

supply from shorts.

10. Optical Filter—Optically filters for wavelength of impurity

emission.

11. High Voltage Transformer — Supplies ionization voltage to

the analytical cell causing the sample gas to glow. The

transformer is powered by the AC line voltage.

12. Regulated 255-Hz Power Supply — A crystal-controlled

power supply with an adjustable output. The output is set to

supply a modulated 90 VAC output to the high voltage

transformer to ionize the sample gas in the analytical cell.

Teledyne Analytical Instruments 7

Introduction Model 2120

13. Low-Flow Switch — Works by magnetic levitation. When

sample flow drops below the flow switch setpoint, the switch

makes and pulls in the double-pole relay.

14. Rotameter Inlet and Outlet Connections — 114-in (0.64-cm)

Swagelok compression fittings used to connect the sampling

lines to the rotameter.

15. Zero and Span Potentiometers — Used for calibration with

zero and span gas.

16. Test Jack Panel — Used to check the 255 Hz power supply,

the +15 and -15 VDC power supply, and the 0-10 mV input to

the 4-20 mA output module.

17. 4 - 20 mA Module — Provides a fully isolated DC output in

proportion to impurity level.

18. Amplifier Board — Conditions the electrical impurity signal

from the PMT and contains overrange alarm circuit.

Figure 1-4: Internal Components in Card Cage

1.7 Additional Safety Information

Note: The material provided in this section contains information

to promote safety in the operation and maintenance of this

equipment. It is not intended to supersede, replicate, or

replace any safety documentation or procedures provided

from or established by official safety sources.

Do NOT operate the Model 2120 Trace Nitrogen in Argon Gas

Analyzer until you read and understand the operating,

8 Teledyne Analytical Instruments

Trace Nitrogen in Argon Analyzer Introduction

maintenance, and safety instructions included in this

manual.

Anyone involved with the operation of this equipment

including plant engineering, operations, and management, must

understand the potential hazards involved, and know and observe all

required safety precautions.

Your safety and the safety of equipment, nearby facilities, and

personnel require a proper safety attitude and emphasis on safe work

procedures. This is the essence of any good safety program. If at any

time you identify safety deficiencies, immediately correct them and

bring them to the attention of management.

Before an accident can be prevented, it must be anticipated. Use

pre-job discussions with your coworkers and supervisors to identify

hazards and the means to avoid them. At your facility, various gases

may exist in liquid and/or gaseous states. Familiarize yourself with the

hazards associated with each gas found at your facility.

Read and understand the Material Safety Data Sheets (MSDS) for

the materials used with this equipment. All personnel who work in the

vicinity of this equipment should read, understand, and follow all safety

information contained in the MSDSs, in addition to following all

government and facility safety regulations.

CAUTION: NEVER INTRODUCE GASES OTHER THAN ARGON

INTO THE ANALYZER. IF EXPLOSIVE, FLAMMABLE,

OR CORROSIVE GASES OR GAS MIXTURES ARE

ALLOWED TO FLOW INTO THE ANALYZER, FIRE OR

EXPLOSION CAN RESULT. THIS ANALYZER IS NOT

DESIGNED TO BE USED IN HAZARDOUS AREAS.

1.7.1 Emergency Procedures

This analyzer is designed to operate safely, efficiently, and reliably.

However, as with any analytical equipment involving gases, an

emergency can occur at any time. The emergency response could

involve calling for medical assistance, management notification, fire

assistance, or evacuation from the vicinity of the analyzer. Obtain the

following phone numbers and post them at the site telephone locations.

Periodically review the numbers and update them as required.

Teledyne Analytical Instruments 9

Introduction Model 2120

Ambulance: ___________

Fire Department: ___________

Sheriff or Police Department: ___________

On-Site Operations Representative: ___________

Training and education are the most important parts of any safety

program. For every possible emergency, establish an Emergency

Response Plan and maintain it for immediate use.

1.7.2 Basic Safety Requirements

The following safety guidelines apply at all times when working

with the Model 2120 analyzer:

Prevent electrical shock — Unplug and remove the AC power

cord from the rear panel before opening and working on the

analyzer. Use tools designed for work on electrical equipment.

Prevent injury — Always wear safety glasses and appropriate

safety protection. Ensure that all tools and instruments used

during installation and maintenance are in good condition. Be

aware that high-velocity gas may be released at vents and safety

relief valves.

Follow posted precautions — Read all precautionary labels

attached to the equipment. Be sure to read all cylinder labels and

warnings. Comply with all precautions before handling the

equipment.

Situations may develop for which no written procedures exist.

Think carefully before acting. Know the function of each valve and

switch, and its effect on the equipment. Carefully review all operating

procedures before starting up this equipment to ensure knowledge and

understanding.

1.7.3 Precautionary Labels

WARNING: TO AVOID SERIOUS INJURY, READ ALL

PRECAUTIONARY LABELS ATTACHED TO

EQUIPMENT, CYLINDERS, CONTAINERS, AND

BOXES PRIOR TO START-UP.

10 Teledyne Analytical Instruments

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Teledyne 2120 User manual

Teledyne 2120 User manual

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