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Instruction 24-9448 5-13
Calibration
cause the message “Bad Calibration Wrong CAL Entry” to appear in the
following step.
5. Adjust regulator for a flowmeter indication of approximately 2 SCFH.
Wait until the Measured reading stabilizes (approximately 3 minutes),
and then press ENT to calibrate the NO
2
Measured value to that of the
Applied value. The message “Good Calibration” should briefly appear
followed by the CALIBRATION LIST screen being re-displayed.
If the sensor’s output is low, but still usable, then the message “Good
Calibration WARNING Low Sensor” will appear. The sensor will now
be marked as being Low in the DIAGNOSTICS screen.
If the sensor’s output is too low to be usable, then the message “Bad
Calibration Sensor End of Life, Entry Not Saved” will appear followed
by the CALIBRATION LIST screen being re-displayed. The sensor will
now be marked as being BAD in the DIAGNOSTICS screen.
6. Turn OFF regulator and remove gas cylinder.
5.10 CO-HI Sensor Calibration
This procedure spans the optional carbon monoxide high sensor (4,001 to
20,000 ppm) to a known gas level.
Material Required:
Calibration Kit, P/N 24-7059
Gas Cylinder: 4,000 ppm CO in Air, P/N 24-1155
Procedure:
1. If not already done, turn ON the analyzer and display the
CALIBRATION LIST screen per Section 5.2.
2. Use the buttons to highlight CO-HI, and
then press ENT to display the CALIBRATE
CO-HI screen.
“Measured” is the current CO reading, while
“Applied” is a known CO level that will be
applied for calibration purposes.
3. Attach a 4,000 ppm CO cylinder to the
regulator of the calibration fixture shown in
Figure 5-2 on Page 5-14.
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CALIBRATION LIST
(more)
T-Air
CO-LO
SO2
NO
NO2
CO-HI
T-Ref
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