Teledyne Analytical Instruments 3110XL, Руководство по эксплуатации

Страница: 20 / 44

Installation Model 3110XL
Teledyne Analytical Instruments
10
2.3.1 Installing the Trace Sensor
Prior to installing the trace sensor, make sure the analyzer is ready
to purge with zero gas. Connect the vent line to the analyzer then
connect the zero gas line to the sample in port. Set the zero gas flow rate
to between 0.2 and 2.5 SCFH.
Prior to using any bottled gas for calibration or purge, it is good
practice to bleed the regulator and sample line to remove any traces of
trapped air. See Section 2.4.3 Bleeding the Regulator and Purging the
Gas Line.
Once the vent and zero gas lines are attached and the lines are
properly purged, proceed to install the trace sensor as follows:
1. Remove the cell holder cap from the bottom of the
instrument.
2. Remove the outer packaging from the sensor.
3. While the sensor is still in its packaging, grip the shorting
plug through the bag and remove it from the sensor.
4. Remove the packaging and rapidly place the sensor on the
top of the cell holder cap with the concentric gold rings
facing up.
5. Screw the cell holder cap and sensor into the bottom of the
analyzer.
Note: Minimize the time the sensor is exposed to air.
6. Start the purge flow through the analyzer and purge
overnight before calibrating the unit.
2.4 Calibration
Calibration involves using a span gas to calibrate the instrument.
The proper span gas oxygen concentration depends on the range that the
instrument will be used. The correct concentration should be 80-90% of
the range used. For instance, if the analyzer is to be used on a range of 0-
2 ppm oxygen, then a span gas should be prepared with 1.6-1.8 ppm
oxygen in nitrogen. If the analyzer is going to be used on a percent
range, acceptable accuracy may be obtained using air as a span gas.
2.4.1 Calibration Using Air for Percent Analysis
Note: Calibration requires a familiarity with the operational
screens and general operation of the instrument. Read