Bacharach PCA3 Spezifikationen PDF herunterladen (Seite 74)

PCA



3 Manual

74 0024-9473 Rev 4

6.7.2. Procedure

1. If not already done, turn ON the analyzer and display the

CALIBRATION LIST screen (refer to Calibration on page 66).

2. Use the ▲▼ buttons to highlight CO-LO, and then press ENT to display

the CALIBRATE CO screen.

NOTE:

“Measured” is the current CO reading, while

“Applied” is a known CO level

that will be applied for

calibration purposes.

3. Attach a 500 ppm CO cylinder to the regulator of the calibration fixture

shown in Figure 6-12 on page 80.

4. Use the ▲▼ and

◄►

buttons to enter an applied value that exactly

equals the concentration stamped on the CO cylinder.

NOTE: The calibration range is 9 to 1,500 ppm. An attempt

to calibrate outside this range causes the message “Applied

Value High” (or Low) to appear at the bottom of the screen.

Figure 6-7. CO

LOW

Sensor Calibration

5. Adjust the regulator for a flow meter indication of approximately 2  SCFH.

Wait until the measured reading stabilizes (approximately 3 minutes),

and then press ENT to calibrate the CO Measured value to that of the

applied value. The message “Good Calibration” should briefly appear

followed by the TEST GAS CO/H

screen.

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, Entry

Not Saved” will appear. The sensor will now be marked as

being BAD in the DIAGNOSTICS screen.

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Bacharach PCA3 Spezifikationen Seite 74