Teledyne 3110 – Portable Trace/Percent Oxygen Analyzer, FM-approved configuration - Manual (Page 19)

Portable Oxygen Analyzer Installation
Teledyne Analytical Instruments 11
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-
100 ppm oxygen, then a span gas should be prepared with 80-90 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
Chapter 3 to understand how to operate the instrument
before proceeding with the calibration step.
To calibrate the instrument using ambient air as a span gas:
1. If not already powered up, press the ENTER key to turn the
instrument on.
2. Set the filter to 1 or 2 on the filter screen.
3. Navigate to the SPAN VALUE screen and set the span to
20.9%. See Section 3.2.6.
4. Select the SPAN screen.
5. Install the vent and sample in lines in that order.
6. Remove the cell holder cap on the bottom of the instrument.
This exposes the cell to air for calibration.
7. Replace the cell holder cap after a few seconds and observe
the oxygen reading on the SPAN screen.
8. When the reading appears stable, select SPAN: START.
9. When the screen changes to SPAN: FINISH, select SPAN:
FINISH.