Bacharach PCA3 Spécifications télécharger pdf (Page 76)

PCA



3 Manual

76 0024-9473 Rev 4

6.8. SO

Sensor Calibration

This procedure spans the optional sulfur dioxide sensor to a known gas

level.

6.8.1. Material Required

•

Calibration Kit ( P/N 0024-7059)

•

Gas Cylinder (100 ppm SO

in Nitrogen, P/N 0024-1158)

6.8.2. 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 SO

, and then press ENT to display

the CALIBRATE SO

screen.

NOTE: “Measured” is the current SO

reading, while

“Applied” is a known SO

level that will be applied for

calibration purposes.

3. Attach a 100 ppm SO

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 SO

cylinder.

NOTE: The calibration range is from 9 to 1,800 ppm. An

attempt to calibrate outside this range will cause the

message “Bad Calibration Wrong CAL Entry” to appear in

the following step.

Figure 6-9. SO

Sensor Calibration

5. Adjust 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 SO

Measured value to that of the

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

followed by the CALIBRATION LIST screen being re-displayed.

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