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Instruction 24-9448 5-9
Calibration
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. The sen-
sor will now be marked as being BAD in the DIAGNOSTICS screen.
NOTE: H
2
calibration can be bypassed by pressing the ESC
button, after which the CALIBRATION LIST screen is re-dis-
played. Skip to Step 10 if the ESC button was pressed.
6. Turn OFF the regulator of calibration fixture and remove the CO
cylinder.
7. Attach a combination 1,000 ppm CO and
1,000 ppm H
2
cylinder to the regulator of the
calibration fixture, and then use the and
buttons to enter an Applied value that
exactly equals the CO concentration stamped
on the cylinder.
8. Adjust the regulator for a flowmeter indica-
tion of approximately 2 SCFH, and then press
ENT to display the CALIBRATE H
2
screen.
The calibration range is from 400 to 1,500 ppm. An attempt to cali-
brate outside this range will cause the message “Bad Calibration
Wrong CAL Entry” to appear in the following step.
9. Wait until the Measured reading stabilizes
(approximately 3 minutes), and then press
ENT to calibrate the H
2
Measured value to
that of the Applied value; after which 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” will appear followed by the
CALIBRATION LIST screen being re-displayed. The sensor will now
be marked as being BAD in the DIAGNOSTICS screen.
10. Turn OFF the regulator and remove the gas cylinder.
TEST GAS CO/H2
Enter CO VALUE
1000 PPM
06/27/06 11:55:30 PM
PRINT
F1 F2 F3
CALIBRATE H2
Measured 1000 PPM
Applied 1000 PPM
06/27/06 11:55:30 PM
PRINT
F1 F2 F3