GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 86
10. Press and release POWER MODE to save the change. The calibration gas value stops flashing
and the unit returns to the channel selection screen.
11. Repeat Step 7 through Step 10 for any other channels that need to be changed.
12. Use AIR to place the cursor next to ESCAPE.
13. Press and release POWER MODE. The instrument returns to the SETTING CAL--P menu
item in the Auto Cal Menu.
14. Use AIR to place the cursor next to ESCAPE.
15. Press and release POWER MODE. The instrument returns to the GAS CAL menu.
16. See “Exiting the GAS CAL Menu” on page 90 to return to User Mode.
Making Cylinder Selections in CYL SETTING
The CYL SETTING menu item allows you to group gases together for calibration. As shipped
from the factory, the standard 4 gases (combustible gas, O
2
, H
2
S, CO) are assigned to Cylinder A
which means all 4 gases are calibrated at once. As shipped from the factory, the hydrogen-
compensated CO and toxic gases are assigned to Cylinder D or Cylinder E. There are 5 cylinder
assignments available: A, B, C, D, and E. To calibrate each gas separately, assign each gas to a
different cylinder (ie. Cylinder A: combustible gas, Cylinder B: O
2
, Cylinder C: H
2
S, Cylinder D:
CO, Cylinder E: CO
2
).
1. While in User Mode, use AIR to place the cursor next to GAS CAL.
2. Press and release POWER MODE. The Gas Cal menu appears.
Carbon Dioxide (0 - 10,000 ppm) 3,000 ppm 9,000 ppm
Carbon Dioxide (0 - 10.00% vol) 1.00% vol 4.00% vol
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
Channel
Min. Cal.
Concentration
Max. Cal.
Concentration
MAINTE 7:49
BUMP TEST
GAS CAL
CAL SETTING
USER MODE
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