Analytical Industries GPR-7500 AIS Trace PPM Hydrogen Sulfide Analyzer - Manual (Page 5)

Advanced Instruments, Inc.
5
3. Maintenance
Serviceability:
Except for replacing the hydrogen sulfide sensor, there are no parts inside the
transmitter for the operator to service.
Only trained personnel with the authorization of their supervisor should conduct maintenance.
H
2
S Sensor: DO NOT open the sensor. The sensor contains a corrosive liquid electrolyte that could be
harmful if touched or ingested, refer to the Material S afety Data Sheet contained in the Owner’s Manual
appendix. Avoid contact with any liquid or crystal type powder in or around the sensor or sensor housing, as
either could be a form of electrolyte. Leaking sensors should be disposed of in accordance with local
regulations.
Troubleshooting: Consult the guidelines in Section 8 for advice on the common operating errors
before concluding that your transmitter is faulty. Do not attempt to service the transmitter beyond those
means described in this Owner’s Manual.
Do not attempt to make repairs by yourself as this will void the warranty as per Section 10 and may result in
electrical shock, injury or damage. All other servicing should be referred to qualified service personnel.
Cleaning: The transmitter should be cleaned only as recommended by the manufacturer. Wipe off dust
and dirt from the outside of the unit with a soft damp cloth then dry immediately. Do not use solvents or
chemicals.
Non-use Period: If the transmitter is equipped with a range switch advance the switch to the OFF
position and disconnect the power when the transmitter is left unused for a long period of time.
Installation
This analyzer has been constructed in compliance with
EN 60079-0 : 2006
EN 60079-1 : 2004
EN 60079-11 : 2007
It must be installed in accordance with
EN 60079-14
Sampling Stream:
Ensure the gas stream composition of the application is consistent with the
specifications and if in doubt, review the application and consult the factory before initiating the installation.
Note: In natural gas applications such as extraction and transmission, a low voltage current is applied to the
pipeline itself to inhibit corrosion of the pipeline. As a result, electronic devices connected to the pipeline can
be affected unless they are adequately grounded.
Contaminant Gases/Liquids in Sample Stream: A sample flow indicator with integral
metering valve is required upstream of the analyzer to remove any interfering gases such as oxides of sulfur
and nitrogen that can interfere with measurement. Sample must be free from any condensable liquid. With
gas streams containing condensable liquids, a coalescing filter must be installed upstream of the sensor.
Consult the factory for recommendations concerning the proper selection and installation of sample
conditioning requirements.
Expected Sensor Life:
With reference to the publish specification located in Section 4 of this
manual, the expected life of all H
2
S sensors is predicated on the rate of loss of electrolyte from the sensor at