Document No. 715-7000
Revision E
Page 43 of 63
AeroNOx
Calibration Procedure:
1.
Turn Power on.
2.
Use only the calibration circuit supplied, P/N 415-0000.
Failure to use the supplied
calibration circuit may result in damage to the AeroNOx
or inaccurate calibration results.
OXYGEN SENSOR CALIBRATION
3.
Connect the nipple end of the calibration circuit to oxygen tubing
.
4.
Run wall O
2
through the cal. circuit @ 0.5 LPM.
5.
Connect the luer connector of the calibration circuit to the sample inlet of the AeroNOx
.
6.
Allow the O
2
reading to stabilize for 2 - 4 minutes. Calibrate oxygen sensor @ 100% by
adjusting the calibration potentiometer using the calibration screwdriver (
P/N 416-0010
)
provided.
** When using the oxygen analyzer to analyze oxygen concentrations
below 30%, the oxygen analyzer should be re-calibrated to 21% oxygen to improve
the accuracy in the lower range.
ZERO BOTH NO & NO
2
SENSORS
The NO and NO
2
cells can be zeroed in oxygen or in room air. You may choose to leave the
oxygen running during the zero procedure.
7.
NO Zero Procedure:
Zero the NO sensor by depressing and holding the NO zero button
down. The words
ZERO NO
appear on the screen. The sensor is zeroed when the word
DONE!
appears.
8.
NO
2
Zero Procedure:
Zero the NO
2
sensor by depressing and holding the NO
2
zero
button down. The words
ZERO NO
2
appear on the screen. The sensor is zeroed when
the word
DONE!
appears.
CALIBRATE NO
2
SENSOR
9. Disconnect
calibration
circuit from the AeroNOx
.
10.
Disconnect the O
2
and attach NO
2
calibration gas to the calibration circuit.
11.
Turn on the calibration gas flow by opening the valve located on the calibration gas
cylinder. The calibration regulators (
P/N 731-9141
) are factory set to deliver 0.5 LPM. If
you are not using these regulators, be sure to adjust the calibration gas flow to 0.5 LPM.
12.
Connect calibration circuit to the AeroNOx
as in Step 5.
13.
Allow the NO
2
reading to stabilize for 2 - 4 minutes, or until the reading has not changed
for at least 30 seconds. Adjust the NO
2
potentiometer on the front panel with the
calibration screwdriver (clockwise to increase, counterclockwise to decrease) until the
display matches the chemist’s reported “ACTUAL” NO
2
reading on the gas cylinder label.
PURGE NO / NO
2
SENSORS
14.
Disconnect the NO
2
calibration gas, and run oxygen through the calibration circuit @ 0.5
LPM (or allow room air to be drawn in to the analysis sample inlet) until both sensors read
zero.