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Instruction 24-94485-12
Calibration
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.
5.9 NO
2
Sensor Calibration
This procedure spans the optional nitrogen dioxide sensor to a known
gas level.
Material Required:
Calibration Kit, P/N 24-7059
Gas Cylinder: 100 ppm NO
2
in Nitrogen, P/N 24-1157
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 NO
2
, and
then press ENT to display the CALIBRATE
NO
2
screen.
“Measured” is the current NO
2
reading, while
“Applied” is a known NO
2
level that will be
applied for calibration purposes.
3. Attach a 100 ppm
NO
2
cylinder to the
regulator of the calibration fixture shown in
Figure 5-2 on Page 5-14.
4. Use the and buttons to enter an
Applied value that exactly equals the concen-
tration stamped on the NO
2
cylinder.
The calibration range is from 9 to 150 ppm.
An attempt to calibrate outside this range will
•
•
CALIBRATION LIST
(more)
T-Air
CO-LO
SO2
NO
NO2
CO-HI
T-Ref
MENU
F1 F2 F3
CALIBRATE NO2
Measured 96 PPM
Applied 100 PPM
06/28/06 11:45:30 AM
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F1 F2 F3