48 • Chapter 5: User Mode and Calibration
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4. Press and release POWER MODE. The Auto Cal screen displays.
5. Use AIR to scroll to
CAL--P
.
6. Press and release POWER MODE. The gas name displays.
7. Press and release POWER MODE. The calibration value begins to flash.
8. Use AIR to adjust the calibration gas value. The calibration gas value in the instrument
must match the value listed on the calibration gas cylinder you are using. Limits on the
calibration gas value are shown in the table below.
9. Press and release POWER MODE to save the change. The calibration gas value stops
flashing and the unit returns to the gas name screen.
10. Use AIR to scroll to
ESCAPE
.
11. Press and release POWER MODE to return to the
CAL--P
item in the
A-CAL
menu.
12. Press AIR to scroll to
ESCAPE
.
13. Press and release POWER MODE to return to the
A-CAL
item in the
GAS CAL
menu.
Table 12: Calibration Concentration Limits
Channel
Min. Cal.
Concentration
Max. Cal
Concentration
Ammonia
8 ppm
400 ppm
Chlorine
0.15 ppm
10.00 ppm
Hydrogen Cyanide
0.9 ppm
30.0 ppm
Nitrogen Dioxide
0.50 ppm
20.00 ppm
Phosphine
0.05 ppm
20.00 ppm
Sulfur Dioxide
0.50 ppm
100.00 ppm
SO2
5.00
A-CAL
ppm
CAL-P
SO2
CAL-P
ppm
SO2
5.00
CAL-P
ppm