Bacharach PCA3 Spezifikationen PDF herunterladen (Seite 75)

PCA



3 Manual

0024-9473 Rev 4 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

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

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

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).

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Bacharach PCA3 Spezifikationen Seite 75