PCA
3 Manual
0024-9473 Rev 3
75
6. Turn OFF 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 flow meter indication of approximately 2 SCFH,
and then press ENT to display the CALIBRATE H
2
screen.
NOTE:
The calibration range is 400 to 1,500
ppm. Calibrating
outside this range causes the message “Bad Calibration
Wrong CAL Entry” to appear in the next step.
Figure 6-8. CO
LOW
Sensor Calibration
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.
NOTE:
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.
NOTE:
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.
NOTE:
A CO-only calibration can be done by pressing
F3
in Step 5
(instead of
ENT
).
Summary of Contents for PCA3
Page 23: ...PCA 3 Manual 0024 9473 Rev 3 23 Figure 3 2 Connecting the Probe to the Analyzer...
Page 64: ...PCA 3 Manual 64 0024 9473 Rev 3 Figure 5 23 Printer Alignment and Sample Printout...
Page 84: ...PCA 3 Manual 84 0024 9473 Rev 3 Figure 7 2 Inside View with Rear Case Removed...
Page 86: ...PCA 3 Manual 86 0024 9473 Rev 3 Figure 7 5 Wire Routing Connectors and Solder Connections...
Page 101: ...PCA 3 Manual 0024 9473 Rev 3 101...
Page 102: ...PCA 3 Manual 102 0024 9473 Rev 3...
Page 103: ...PCA 3 Manual 0024 9473 Rev 3 103...
