Teledyne 2120 User Manual
OPERATING INSTRUCTIONS FOR
Model 2120
Trace Nitrogen in Argon Analyzer
P/N MXXXX
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.
ECO:
Teledyne Analytical Instruments
Model 2120
Copyright © 2006 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 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, an d serves as a to ol by whic h
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.
No
Symbol
CAUTION: THE ANALYZER SHOULD ONLY BE USED ONLY
NOTE: Additional information and comments regarding a
specific component or procedure are highlighted in the form
of a note.
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
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.
WARNING
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 d i s c h a r g e
brightness deteriorat e s d u e t o a n 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 voltag e, 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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