Specifications

PCA

5. Adjust regulator for a ﬂ owmeter indication of approximately

2 SCFH. Wait until the Measured reading stabilizes (approximate-

ly 3 minutes), and then press ENT to calibrate the SO

Measured

value to that of the Applied value. The message “Good Calibration”

should brieﬂ y 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, Entry Not

Saved” will appear followed by the CALIBRATION LIST

screen being re-displayed. The sensor will now be marked

as being BAD in the DIAGNOSTICS screen.

6. Turn OFF regulator and remove gas cylinder.

5.9 NO Sensor Calibration

This procedure spans the optional nitric oxide sensor to a known gas level.

Material Required:

• Calibration Kit, P/N 0024-7059

• Gas Cylinder: 250 ppm NO in Nitrogen, P/N 0024-1156

Procedure:

1. If not already done, turn ON

the analyzer and display the

CALIBRATION LIST screen per

Section 5.2.

2. Use the ▲▼ buttons to highlight NO,

and then press ENT to display the

CALIBRATE NO screen.

“Measured” is the current NO reading,

while “Applied” is a known NO level

that will be applied for calibration purposes.

3. Attach a 250 ppm NO cylinder to the regulator of the calibration

ﬁ xture shown in Figure 5-2 on Page 85.

4. Use the ▲▼ and ◄► buttons to enter an Applied value that

exactly equals the concentration stamped on the NO cylinder.