GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 68
3. Install the calibration cup onto the GX-3R Pro. Use the label and imprinting to make sure that
the calibration cup gets installed in the correct orientation relative to the GX-3R Pro. Be sure
the calibration cup is pushed on all the way.
4. Use the tubing to connect the regulator to the inlet of the calibration cup.
5. While in User Mode, use AIR to place the cursor next to BUMP TEST.
6. Press and release POWER MODE. The display shows the gases assigned to Cylinder A and
their assigned calibration values (see page 85 if the calibration values do not match the
calibration gas cylinder’s concentrations).
7. If necessary, use AIR to scroll to the Bump screen for the gas(es) you want to bump test. As
shipped from the factory, the standard 4 gases (combustible gas, O
2
, CO, and H
2
S) are
assigned to Cylinder A. If a H
2
-compensated CO sensor is installed, H
2
is assigned to
Cylinder D but there is no reason to bump test the H
2
response. Toxic sensors are assigned to
Cylinder D or Cylinder E.
CO/H2S LEL O2 TOXIC
GX-3R Pro
AIR
POWER
MODE
Inlet
FRONT
Figure 7: Calibration Cup Installation
MAINTE 7:49
BUMP TEST
GAS CAL
CAL SETTING
USER MODE
MAINTE 7:49
12.0
O2 %
50 50 25.0
CH4 %LEL CO ppm H2S ppm
BUMP TEST CYLINDER A
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