Endress+Hauser SpectraSensors SS2100r, Hardware Manual

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Troubleshooting & Maintenance
Hardware Manual B
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3
appropriate for the area and hazards present. Electrical connections must not
be made or broken with power on (to avoid arcing).
Gas Leaks
Probably the most common cause of erroneous measurements is outside air
leaking into the sample supply line. SpectraSensors recommends periodically
leak-testing the supply lines, especially if the analyzer has been relocated or
has been replaced or returned to the factory for service and the supply lines
have been reconnected.
Contamination
Contamination and long exposure to high humidity are valid reasons for
periodically cleaning the gas sampling lines. Contamination in the gas sampling
lines can potentially find its way to the sample cell and deposit on the optics or
interfere with the measurement in some other way. Although the analyzer is
designed to withstand some contamination, it is recommended to always keep
the sampling lines as contamination free as possible.
To keep the sampling lines clean:
1. Make sure that a membrane separator filter (included with most
systems) is installed ahead of the analyzer and operating normally.
Replace the membrane if necessary. If liquid enters the cell and
accumulates on the internal optics, a Laser Power Low Alrm fault
will result.
2. If mirror contamination is suspected, see “Cleaning the Mirrors”
on page B-4.
3. Turn off the sample valve at the tap in accordance with site lock-out,
tag-out rules.
4. Disconnect the gas sampling line from the sample supply port of the
analyzer.
Do not use plastic tubing of any kind for sample lines. Plastic
tubing is permeable to moisture and other substances which can
contaminate the sample stream. SpectraSensors recommends
using 1/4” O.D. x 0.035” wall thickness, seamless stainless steel
tubing.
Process samples may contain hazardous material in potentially
flammable and/or toxic concentrations. Personnel should have a
thorough knowledge and understanding of the physical properties
and safety precautions for the sample contents before operating
the sample conditioning system (SCS).