Teledyne 2120 - Trace Nitrogen in Argon Analyzer - Manual (Page 47)

Trace Nitrogen in Argon Analyzer Maintenance
Maintenance
CAUTION: MAINTENANCE AND REPAIR OF THE MODEL 2120
ANALYZER INVOLVE POTENTIALLY
HAZARDOUS
PROCEDURES. ONLY TRAINED AND QUALIFIED
PERSONNEL WHO HAVE READ AND UNDERSTOOD
THE INSTRUCTIONS IN THIS MANUAL SHOULD
WORK ON THIS EQUIPMENT.
5.1 Routine Maintenance
Aside from normal cleaning and checking for leaks at the gas
connections, routine maintenance consists of recalibration and periodic
inspection of essential analyzer parts. For calibration procedures, refer to
Section 4.2. The periodic inspection of analyzer parts helps ensure
continuing high performance and reduces malfunctions that could lead
to analyzer downtime.
5.2 Routine Maintenance Schedule
Perform a routine calibration of the analyzer at least once every one to
two weeks. Keep a log of the percentage zero and percentage span
deviation settings. This ensures not only that accuracy is maintained; it
also may help in troubleshooting the analyzer if these settings vary
widely at each calibration or vary consistently up or down scale. If the
readings are stable from calibration to calibration, then the frequency of
routine calibrations can be decreased accordingly.
Check the sample and reference gas flow rates at least every one to two
weeks. Use the rotameter on the front panel to check that the sample
flow rate is approximately 2 cfh (0.9 slpm).
Check for excessive accumulation of dirt. In dusty locations, you may
need to wipe or gently blow off dust from the various sections at least
once a week. Any accumulation of dust or oil film hinders satisfactory
operation.
On an annual basis, check the gas lines for signs of leaks.
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