User Manual SERVOPRO Plasma Trace N
2
Analyzer
9.0 MAINTENANCE AND TROUBLE SHOOTING
9.0 MAINTENANCE AND TROUBLE SHOOTING
9.1 Maintenance
This analyzer is maintenance-free. You only need to calibrate at the frequency determined by
your experience. Normally, if you use a clean gas and a good sampling system, a calibration
every two weeks is enough.
The unit has a two micron inlet filter. Depending on the conditions of use, you may need to
replace this filter. Normally, it is a good idea to replace it once a year. This filter traps particles
that may accumulate moisture. This moisture is released at different rates, depending on ambient
temperature and particle size. For this reason, instability may occur if your filter has any
accumulation of dirt. See “Appendix 1”.
9.2 Trouble-shooting
Generally, it is strongly
recommended
to limit your interventions to the replacement of defective
modules. If you experience trouble during normal operation, use the DIAGNOSTIC MENU to
verify cell counts and flow counts. Before referring to the trouble-shooting procedure, you have
to make sure that the flow is constant and the vent pressure is at atmospheric pressure.
You cannot open the cover of the module because it is filled with special putty material. For
example, there is silicon base putty for the cell, around the quartz to allow for thermal expansion.
Surrounding this silicon, a special sealing putty with appropriate dielectric properties fills the rest
of the modules and cures under vacuum. The result is a leak-free, vibration-resistant, thermally
stable system.
The cell module, the signal conditioner with optical separation system and the flow module are
not serviceable. Under normal conditions, they will last for years.
The analyzer is modular; therefore module replacement is fast and easy.
We recommend the following spare parts: One (1) flow module
One (1) DC power supply
One (1) I/O board
One (1) set of fuses
The following table will help you identify possible causes of problems. If you cannot fix your
problem after these suggestions, please contact the factory and be ready to give details regarding
the installation of your analyzer.
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