Analytical Industries GPR-2600 Series Oxygen Analyzer - Manual (Page 39)

Advanced Instruments Inc.
39
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.
Air Calibration –
Standard Sensor
and Flow Housing:
Access the interior of the analyzer by opening the front door of the analyzer.
With the left hand hold the gas connections of the housing and unscrew the
oxygen sensor from the flow housing with the right hand.
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.
Air Calibration –
Optional Sensor
and Sensor Housing:
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.