PureAire Monitoring Systems, Inc.
2/22/2000
17
11.
Adjust the instrument’s span potentiometer until the displayed gas reading
matches the concentration value of the calibration gas.
Note:
Depending on
the gas sensor a clockwise or counterclockwise rotation increases the value; a
counterclockwise or clockwise rotation decreases the value.
10.
Close the valve on the calibration gas bag and permit the instrument to return
to a zero reading.
11.
Open the valve on the calibration gas bag and verify that the display reading
matches the concentration of the calibration gas. Readjust the span
potentiometer as required.
12.
Close the valve on the calibration gas bag and disconnect it from the
calibration cap.
13.
Allow the instrument to return to a zero reading. If the instrument has not
returned to zero after 5 minutes, readjust the zero potentiometer as required.
14.
Close the valve on the waste gas bag and disconnect from the sampling
pump.
15.
Turn the sampling pump “off.”
16.
Carefully remove the calibration cap from the sensor cell.
IMPORTANT:
Do not twist the calibration cap for D-type or renewable sensor
cells.
17.
Replace the calibration port cover.
18.
If the instrument is connected to a controller, return the controller to the
monitoring mode.
WARNING:
Be sure to dispose of the remaining calibration gas and waste gas
properly.
Calibration Adapter
