Teledyne 2120 - Trace Nitrogen in Argon Analyzer - Manual (Page 40)

Operation Model 2120
4.1 Powering Up the Analyzer
CAUTION: OZONE EMISSIONS ARE POSSIBLE IF AIR OR
MOISTURE ARE IONIZED IN THE SAMPLING
SYSTEM. THE SAMPLE PATH MUST BE
RELATIVELY FREE OF AIR AND/OR MOISTURE
BEFORE APPLYING THE IONIZING VOLTAGE.
KEEP THE POWER OFF UNTIL THE ANALYZER IS
FULLY PURGED.
The Range switch on the front of the analyzer should be toggled to
the desired measurement range prior to power-up and calibration.
Note: When changing measurement ranges, recalibration is
necessary.
1. Purge the analyzer and sampling system using the procedure
described in Section 3.6.
2. Turn on the analyzer by pushing the Power Switch on the
power entry module on the rear panel to the ON position. The
power light on the front panel will illuminate.
3. Sample flow is regulated by an orifice in the sample inlet
connection, As the flow rate into the analyzer increases
beyond approximately 1.0 cfh (470 ccpm), the on-line
light illuminates. This indicates that the flow switch is
operating correctly.
CAUTION: EQUIPMENT DAMAGE MAY RESULT IF THE
ANALYTICAL CELL IN THIS UNIT IS EXPOSED TO
EXCESSIVE PRESSURE, CAUSING IT TO BREAK OR
SHATTER.
DO NOT REMOVE THE FLOW CONTROL ORIFICE
FROM THE SAMPLE INLET OF THE ANALYZER.
4. Observe the digital panel meter while allowing the instrument
to warm up and the readings stabilize. Drift occurs until internal
temperatures stabilize and the analytical cell is completely
purged. A persistent drift indicates an improperly purged
system or an air leak into the system. Refer to Section 5 for
suggested corrective procedures.
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Teledyne Analytical Instruments