Spectrasensors SS500 Manual

SS500/SS2000/SS3000
Gas Analyzer
Hardware Installation
and Maintenance Manual
P/N 4900002215 rev D
SS500/SS2000
SS3000 H2O/CO2
SS3000 H2O/H2O

Hardware Installation and
Maintenance Manual

Products of
4333 W Sam Houston Pkwy N, Suite 100
Houston, TX 77043-1223
Tel: [phone]
Fax: [phone]
www.spectrasensors.com
Copyright © 2016 SpectraSensors, Inc. No part of this manual may be reproduced in
whole or in part without the express written permission of SpectraSensors, Inc.
SpectraSensors reserves the right to change product design and specifications at any
time without prior notice.
SS500/SS2000/SS3000
Gas Analyzer
Hardware Installation and
Maintenance Manual
Use this manual with the
Firmware Operator’s Manual

Revision History
Revision Engineering Order Date
A EO15547 4/8/2014
B ECR16086 3/10/2015
C ECR16353 1/22/2016
D ECR16701 7/29/2016

Hardware Installation and Maintenance Manual i
TABLE OF CONTENTS
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v
1: Introduction
Who Should Read This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
How to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
General Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
SpectraSensors Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
About the Gas Analyzers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Differences between the SS500, SS2000, and SS3000 . . . . . . . . . . . . . . . . . 1-3
How the Analyzers Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Wavelength Modulation Spectroscopy (WMS) Signal Detection . . . . . . . . . . . 1-7
Getting Familiar with the Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
2: Installation
What Should be Included in the Shipping Box . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Inspecting the Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Installing the Analyzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Hardware and Tools for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Mounting the Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Lifting/carrying the analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Connecting Electrical Power to the Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Protective chassis and ground connections . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Connecting the Output Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Changing the 4-20 mA Current Loop Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Calibrating the analog output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Testing and adjusting the 4-20 mA zero and span . . . . . . . . . . . . . . . . 2-10
Connecting the Gas Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Conditioning the SCS Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
3: Sample Conditioning System (SCS)
About the SCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Checking the SCS Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Starting up the SCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Shutting Down the SCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Appendix A: Specifications
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-19
Appendix B: Maintaining & Troubleshooting
Potential Risks Affecting Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Mitigating risks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Electrocution hazard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Explosion hazard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Gas Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Excessive Sampling Gas Temperatures and Pressures . . . . . . . . . . . . . . . . . . . . B-3
Electrical Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

SS500/SS2000/SS3000 Analyzer
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Peak Tracking Reset Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Cleaning the Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Determining the type of cell mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
To replace the stainless steel mirror: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7
Pressure Sensor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8
Periodic SCS Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-14
Regular SCS Status Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-15
Instrument Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-15
Service Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-21
Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-21
Before contacting Technical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-21
Service Repair Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-21
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-22
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-23
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-23
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-23
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1

Hardware Installation and Maintenance Manual iii
LIST OF FIGURES
Figure 1–1. SS500/SS2000 analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Figure 1–2. SS3000 Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Figure 1–3. Schematic of a typical laser diode absorption spectrometer . . . . . . 1-5
Figure 1–4. Typical raw signal from a laser diode
absorption spectrometer with and without mirror contamination. . . 1-6
Figure 1–5. Typical normalized absorption
signal from a laser diode absorption spectrometer . . . . . . . . . . . . 1-7
Figure 1–6. Typical normalized 2f signal; species concentration is
proportional to the peak height . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Figure 1–7. Analyzer Overview (SS3000 pictured) . . . . . . . . . . . . . . . . . . . . . 1-9
Figure 1–8. Electronics control board (AC) for single-channel systems
(SS500/SS2000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Figure 1–9. Electronics control board (DC) for single-channel systems
(SS500/SS2000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Figure 1–10. Electronics control board (AC) for dual-channel
systems (SS3000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Figure 1–11. Electronics control board (DC) for dual-channel
systems (SS3000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Figure 2–1. Internal view of electronics enclosure (SS500) . . . . . . . . . . . . . . . 2-5
Figure 2–2. AC and DC connection terminal blocks in electronics enclosure. . . . 2-6
Figure 2–3. Mating terminal block (TB2) in electronics enclosure for
connecting signal cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Figure 2–4. 4-20 mA output board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Figure 3–1. Typical full-featured, single-channel SCS (SS500/SS2000)
on a panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Figure A–1. SS500/SS2000 0.8-m cell (moisture) outline and
mounting dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Figure A–2. SS500/SS2000 0.1-m cell (carbon dioxide) outline and
mounting dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Figure A–3. Drawing of typical full-featured single-channel SCS
(SS500/SS2000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Figure A–4. Drawing of typical full-featured single-channel SCS
(SS500/SS20000) in 24x24 enclosure . . . . . . . . . . . . . . . . . . . . . A-9
Figure A–5. Drawing of typical full-featured single-
channel SCS (SS500/SS20000) in 30x30 enclosure . . . . . . . . . . A-10
Figure A–6. Electrical schematic for SS500/SS2000 . . . . . . . . . . . . . . . . . . . A-11
Figure A–7. Interconnect diagram for single-channel system
(SS500/SS2000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12
Figure A–8. SS3000 0.8-m/0.1-m cells (H2O/ CO2) outline and
mounting dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13
Figure A–9. SS3000 0.8-m/0.8-m cells (H2O/H2O) outline and
mounting dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14

SS500/SS2000/SS3000 Analyzer
iv 4900002215 rev. D 7-29-16
Figure A–10. Drawing of typical full-featured dual-channel, dual-stream SCS
(SS3000). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-15
Figure A–11. Drawing of typical full-featured dual-channel, dual-stream SCS
(SS3000) in a 36 X 36 enclosure . . . . . . . . . . . . . . . . . . . . . . . A-16
Figure A–12. Electrical schematic for SS3000 . . . . . . . . . . . . . . . . . . . . . . . . A-17
Figure A–13. Interconnect diagram for dual-channel system (SS3000). . . . . . . A-18
Figure B–1. Measurement cell types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Figure B–2. Stainless steel mirror marking . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Figure B–3. Stainless steel mirror - mirror side up . . . . . . . . . . . . . . . . . . . . . B-8
Figure B–4. Analyzer component locations . . . . . . . . . . . . . . . . . . . . . . . . . B-10
Figure B–5. Removed measurement cell with pressure sensor face up . . . . . . B-10
Figure B–6. Removing the old pressure sensor . . . . . . . . . . . . . . . . . . . . . . B-11
Figure B–7. Removing excess seal tape from flange . . . . . . . . . . . . . . . . . . . B-11
Figure B–8. Replacing seal tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-12
Figure B–9. Replacing pressure sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-12
Figure B–10. Newly installed pressure sensor positioning . . . . . . . . . . . . . . . . B-13

Hardware Installation and Maintenance Manual v
LIST OF TABLES
Table 1–1. Fuse specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Table 2–1. Output signal connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Table A–1. SS500 H2O analyzer specifications . . . . . . . . . . . . . . . . . . . . . . . A-1
Table A–2. SS2000 single-channel H2O analyzer specifications. . . . . . . . . . . . A-2
Table A–3. SS2000 single-channel CO2analyzer specifications . . . . . . . . . . . . A-3
Table A–4. SS3000 dual channel H2O/H2O analyzer specifications . . . . . . . . . A-4
Table A–5. SS3000 dual channel H2O/CO2analyzer specifications . . . . . . . . . A-5
Table A–6. Replacement parts for SS500/SS2000/SS3000 analyzers . . . . . . A-19
Table B–1. Potential instrument problems and solutions . . . . . . . . . . . . . . . B-16

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Hardware Installation and Maintenance Manual 1–1
1 - INTRODUCTION
SpectraSensors’ SS500/SS2000/SS3000 products are high-speed, diode-laser
based extractive analyzers designed for extremely reliable monitoring of very
low or trace concentrations of specific components in various background
gases. In order to ensure that the analyzer performs as specified, it is
important to closely review the installation and operation sections of this
manual. This manual contains a comprehensive overview of the
SS500/SS2000/SS3000 analyzer and step-by-step instructions on:
•Getting familiar with the analyzer
•Installing the analyzer and SCS
•Maintaining and troubleshooting the system
For instruction on operating the analyzer through firmware programming,
please consult the Firmware Operations Manual.
Who Should Read This Manual
This manual should be read and referenced by anyone installing, operating or
having direct contact with the analyzer.
How to Use This Manual
Take a moment to familiarize yourself with this manual by reading the Table
of Contents.
There are a number of options and accessories available for the
SS500/SS2000/SS3000 analyzers. This manual has been written to address
the most common options and accessories. Images, tables and charts have
been included to provide a visual understanding of the analyzer and its
functions. Special symbols are also used to provide the user with key
information regarding the system configuration and/or operation. Pay close
attention to this information.
General Warnings and Cautions
Instructional icons are provided in this manual to alert the user of potential
hazards, important information and valuable tips. Following are the symbols
and associated warning and caution types to observe when servicing the
analyzer. Some of these symbols are provided for instructional purposes only
and are not labeled on the system.
Equipment Labels
Warning statement for hazardous voltage. Contact may cause
electric shock or burn. Turn off and lock out system before
servicing.

SS500/SS2000/SS3000 Analyzer
1–2 4900002215 rev. D 7-29-16
Instructional Symbols
Failure to follow all directions may result in damage or
malfunction of the analyzer.
INVISIBLE LASER RADIATION - Avoid
exposure to beam. Class 3b Radiation Product.
Refer servicing to the manufacturer or qualified
personnel.
Removing label from measurement cell optical
head will void analyzer warranty.
General notes and important information concerning the
installation and operation of the analyzer.
Failure to follow all directions may result in fire.
INVISIBLE LASER RADIATION - Avoid exposure to beam.
Class 3b Radiation Product. Refer servicing to the manufacturer-
qualified personnel.
Failure to follow all directions may result in damage or
malfunction of the analyzer.
Maximum voltage and current specifications for fuses.
CAUTION
CLASS 3B INVISIBLE LASER
RADIATION WHEN OPEN
AVOID EXPOSURE TO THE BEAM
!
VA

Introduction
Hardware Installation and Maintenance Manual 1–3
Conventions Used in this Manual
In addition to the symbols and instructional information, the electronic version
of this manual is created with “hot links” to enable the user to quickly navigate
between different sections within the manual. These links include table, figure
and section references and are identified by a pointing finger cursor
when rolling over the text. Simply click on the link to navigate to the associated
reference.
SpectraSensors Overview
SpectraSensors, Inc. is a leading manufacturer of technologically advanced
electro-optic gas analyzers for the industrial process, gas distribution and
environmental monitoring markets. Headquartered in Houston, Texas,
SpectraSensors was incorporated in 1999 as a spin-off of the NASA/Caltech Jet
Propulsion Laboratory (JPL) for the purpose of commercializing space-proven
measurement technologies initially developed at JPL. SpectraSensors was
acquired by the Endress + Hauser Group in 2012, which has expanded our
reach in the global marketplace.
About the Gas Analyzers
The SS500/SS2000/SS3000 are tunable diode laser (TDL) absorption
spectrometers operating in the near infrared region of the spectrum. Each
compact sensor consists of a TDL light source, sample cell and detector
specifically configured to enable high sensitivity measurement of a particular
component within the presence of other gas phase constituents in the stream.
The sensor is controlled by microprocessor-based electronics with embedded
software that incorporates advanced operational and data processing
algorithms.
The SS500/SS2000/SS3000 analyzer may be integrated with a sample
conditioning system (SCS) that has been specifically designed to meet the
sample condition requirements for the analyzer, while preserving sample
integrity and minimizing sample lag time.
A sample conditioning system may also be included with the system that has
been specifically designed to deliver an optimum sample stream that is
representative of the process systems stream at the time of sampling. Most
SS500/SS2000/SS3000 analyzer systems are configured for use at extractive
natural gas sampling stations.
Differences between the SS500, SS2000, and SS3000
The SS500 and SS2000 are single-channel analyzers designed to continuously
measure the moisture content in natural gas pipelines. The SS2000 offers
higher measurement performance in those applications, and its single
measurement channel can also be configured to monitor CO2 levels in natural
gas pipelines, or to measure the moisture content in CO2 pipelines. For

SS500/SS2000/SS3000 Analyzer
1–4 4900002215 rev. D 7-29-16
performance specifications, refer to Table A–1 through Table A–3 and Figure
1–1 for an image of a standard SS500/SS2000 with a 0.8-m cell.
The SS3000 is a dual-channel version of the SS2000 and is usually configured
to measure H2O and/or CO2in the same or separate pipeline natural gas
sample streams (for performance specifications, refer to Table A–4 and
Table A–5). Refer to Figure 1–2 for an image of the analyzer with two 0.8-m
cells.
Figure 1–1 SS500/SS2000 analyzer
Figure 1–2 SS3000 Analyzer

Introduction
Hardware Installation and Maintenance Manual 1–5
How the Analyzers Work
The SS500/SS2000/SS3000 analyzers employ tunable diode laser absorption
spectroscopy (TDLAS) to detect the presence of trace substances in process
gases. Absorption spectroscopy is a widely used technique for sensitive trace
species detection. Because the measurement is made in the volume of the gas,
the response is much faster, more accurate and significantly more reliable than
traditional surface-based sensors that are subject to surface contamination.
In its simplest form, a diode laser absorption spectrometer typically consists of
a sample cell with a mirror at one end, and a mirror or window at the opposite
end, through which the laser beam can pass. Refer to Figure 1–3. The laser
beam enters the cell and reflects off the mirror(s) making one or more trips
through the sample gas and eventually exiting the cell where the remaining
beam intensity is measured by a detector. With the SS500/SS2000/SS3000
analyzers, sample gas flows continuously through the sample cell ensuring that
the sample is always representative of the flow in the main pipe.
Due to their inherent structure, the molecules in the sample gas each have
characteristic natural frequencies (or resonances). When the output of the
laser is tuned to one of those natural frequencies, the molecules with that
particular resonance will absorb energy from the incident beam. That is, as the
beam of incident intensity, I0(),passes through the sample, attenuation occurs
via absorption by the trace gas with absorption cross section (). According
OPTICAL HEAD
DETECTOR
WINDOW
INLET
FAR MIRROR
TEC
LASER
OUTLET
PRESSURE
SENSOR
0.8-m Measurement Cell
Figure 1–3 Schematic of a typical laser diode
absorption spectrometer

SS500/SS2000/SS3000 Analyzer
1–6 4900002215 rev. D 7-29-16
to the Beer-Lambert absorption law, the intensity remaining, I(), as measured
by the detector at the end of the beam path of length I (cell length x number
of passes), is given by
, (1)
where Nrepresents the species concentration. Thus, the ratio of the absorption
measured when the laser is tuned on-resonance versus off-resonance is
directly proportional to the number of molecules of that particular species in
the beam path, or
. (2)
Figure 1–4 shows the typical raw data from a laser absorption spectrometer
scan including the incident laser intensity, I0(),and the transmitted intensity,
I(), for a clean system and one with contaminated mirrors (shown to illustrate
the system’s relative insensitivity to mirror contamination). The positive slope
of raw data results from ramping the current to tune the laser, which not only
increases the wavelength with current, but also causes the corresponding
output power to increase. By normalizing the signal by the incident intensity,
any laser output fluctuations are canceled, and a typical, yet more pronounced,
absorption profile results. Refer to Figure 1–5.
I
 I0exp lN–=
N
1–
l
--------------I
I0
--------------
ln=
3.0
2.5
2.0
1.5
1.0
0.5
Incident Energy I0()
Raw Signal, I()
Raw Signal, I()
(Contaminated Mirrors)
Wavelength [a.u.]
Signal [a.u.]
0.0
Figure 1–4 Typical raw signal from a laser diode
absorption spectrometer with and without mirror
contamination

Introduction
Hardware Installation and Maintenance Manual 1–7
Note that contamination of the mirrors results solely in lower overall signal.
However, by tuning the laser off-resonance as well as on-resonance and
normalizing the data, the technique self calibrates every scan resulting in
measurements that are unaffected by mirror contamination.
Wavelength Modulation Spectroscopy (WMS) Signal Detection
SpectraSensors takes the fundamental absorption spectroscopy concept a step
further by using a sophisticated signal detection technique called wavelength
modulation spectroscopy (WMS). When employing WMS, the laser drive
current is modulated with a kHz sine wave as the laser is rapidly tuned. A lock-
in amplifier is then used to detect the harmonic component of the signal that
is at twice the modulation frequency (2f), as shown in Figure 1–6. This phase-
sensitive detection enables the filtering of low-frequency noise caused by
turbulence in the sample gas, temperature and/or pressure fluctuations, low-
frequency noise in the laser beam or thermal noise in the detector.
1.0
0.99
0.98
0.97
0.96
0.95
Normalized Absorption Signal
Wavelength [a.u.]
Signal [a.u.]
Figure 1–5 Typical normalized absorption
signal from a laser diode absorption spectrometer

SS500/SS2000/SS3000 Analyzer
1–8 4900002215 rev. D 7-29-16
With the resulting low-noise signal and use of fast post-processing algorithms,
reliable parts per million (ppm) or parts per billion (ppb) detection levels are
possible (depending on target and background species) at real-time response
rates (on the order of 1 second).
All SpectraSensors TDL gas analyzers employ the same design and hardware
platform. Measuring different trace gases in various mixed hydrocarbon
background streams is accomplished by selecting a different optimum diode
laser wavelength between 750-3000nm, which provides the least amount of
sensitivity to background stream variations.
Getting Familiar with the Analyzer
SpectraSensors’ SS500/SS2000/SS3000 analyzers are typically comprised of a
single electronics enclosure and associated measurement cell(s). Refer to
Appendix A for system drawings. On the front panel of the analyzer, the keypad
and LCD display serve as the user interface to each analyzer. The analyzer
control electronics drive the laser, collect the signal, analyze the spectra and
provide measurement output signals. Refer to Figure 1–7.
Normalized
2fSignal
Wavelength [a.u.]
Signal [a.u.]
Figure 1–6 Typical normalized 2f signal; species
concentration is proportional to the peak height

Introduction
Hardware Installation and Maintenance Manual 1–9
Power is connected to the analyzer from an external power source through the
bottom of the enclosure. Refer to Table A–1 through Table A–5 for system
specifications. The measurement cell(s) along with flow devices to control flow
and pressure for the measurement cell and the bypass loop are mounted on a
panel alongside the enclosure.
Inside the SS500/SS2000 analyzer electronics enclosure is the electronics
assembly as shown in Figure 1–8 and Figure 1–9.
Inside the SS3000 analyzer electronics enclosure is the electronics assembly
as shown in Figure 1–10 and Figure 1–11.
Fuses are located on the electronics control board, as shown in Figure 1–8,
Figure 1–9, Figure 1–10 and Figure 1–11.
If you need to replace a fuse, use only the same type and rating
of fuse as the original as listed in Table 1–1.
Table 1–1 Fuse specifications
DWG Ref. Voltage Description Rating
Figure 1–8
Figure 1–10 F1
120 VAC Miniature Fuse, 5 x 20 mm, Time Delay 250VAC/0.8A
240 VAC Miniature Fuse, 5 x 20 mm, Time Delay 250VAC/0.5A
Figure 1–9
Figure 1–11 F2
12 VDC Miniature Fuse, 5 x 20 mm, Time Delay 250VAC/3.15A
24 VDC Miniature Fuse, 5 x 20 mm, Time Delay 250VAC/1.6A
Figure 1–7 Analyzer Overview (SS3000 pictured)
LCD/KEYPAD
ANALYZER
ELECTRONICS
ENCLOSURE
MEASUREMENT
CELL AND LASER
POWER CONNECTION
MEASUREMENT
CELL AND LASER
CHASSIS GROUND
!
VA

SS500/SS2000/SS3000 Analyzer
1–10 4900002215 rev. D 7-29-16
Figure 1–8 Electronics control board (AC) for single-
channel systems (SS500/SS2000)
TEMPERATURE
CONTROL BOARD
4-20 mA CURRENT LOOP
BOARD (STACKED)
FUSE
(F1)
4-20 mA & SERIAL SIGNAL
CONNECTIONS
ASSIGNABLE
ALARM RELAY
GENERAL FAULT
ALARM RELAY
NO
COMMON
NC
LASER
DRIVER
BOARD
BACKPLANE
POWER
SUPPLY
CUSTOMER
GROUND
PROTECTIVE
GROUND
COMPONENT
GROUND