Analytical Industries GPR-1600 Series Trace PPB Oxygen Analyzer - Manual (Page 41)

Advanced Instruments Inc.
41
Span Gas Calibration: Assure there are no restrictions in vent line.
Regulate the pressure between 5-30 psig and set the flow rate to 2 SCFH for Fuel Cell sensors.
If the analyzer is equipped with a SAMPLE/BYPASS valve, place it in the BYPASS position.
Disconnect the sample gas line and install the span gas line.
Keep the SAMPLE/BYPASS valve in the BYPASS position.
Allow the span gas to flow for 1-2 minutes to purge the gas lines inside the analyzer.
Place the SAMPLE/BYPASS valve in the SAMPLE position.
If the analyzer is not equipped with a SAMPLE/BYPASS valve:
Allow the span gas to flow for 1-2 minutes to purge the air trapped in the span gas line.
Disconnect the sample gas line and install the purged span gas line.
Air Calibration:
Access the interior of the analyzer by opening the
front door of the analyzer.
Using the 5/16 wrench supplied loosen but do not
remove the clamp bolt located in the center of
the bracket attached to bottom section with the
elbow fittings.
Rotate the upper section of the sensor housing
90º to disengage from the clamp.
Remove the upper section by pulling it straight up and let it rest on your 1
st and 2 nd fingers.
With your other hand remove the oxygen sensor, place it in the upper section of the sensor housing
ensuring the PCB contacts the two gold pins and use your thumb to hold the sensor and upper
section of the sensor housing together.
The sensor is now exposed to ambient air, connected to the analyzer electronics and ready for
calibration.
Allow the sample gas to continue to flow if possible, otherwise close the FLOW valve but do not
disconnect the sample gas line.
Caution: Allow the reading to stabilize before proceeding. A premature SPAN CALIBRATION adjustment can result in erroneous
readings, see the Span Calibration Adjustment section above.
It is highly recommended that the analyzer be connected to an external recording device, if practical, to ensure that the
analyzer reading reaches a stable value (10-20 minutes) before accepting the span calibration.
Advance the cursor (*) to the “Span” option as illustrated and press the green ENTER key to accept the selection.
MAIN MENU
Sample
* Span
Zero
Alarm
System
Standby
Sample
80.0 PPM
Auto Range
85⁰F 100Kpa 0 to 10 PPM
12/31/07 12:00:00