69 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual
8. Make sure the GX-3R Pro has been turned on for at least 45 seconds before continuing.
9. For toxic gas cylinders (like cylinders containing H
2
S), it is important to vent the regulator
while installing it onto the cylinder. Venting the regulator during installation helps prevent air
from getting into the cylinder and degrading the gas. Open the regulator by turning the knob
counterclockwise and install it onto the cylinder.
10. With the appropriate Bump screen displayed, press and release POWER MODE.
11. The gas readings flash, the bottom of the screen indicates “BUMP TEST” and “APPLY
GAS”, and the top of the screen counts down from the time defined in BUMP
SETTING\BUMP PARAMETER\GAS TIME.
NOTE: To back out of the gas application screen without performing the bump test,
press and release AIR and POWER MODE together.
MAINTE 30
20.9
O2 %
0 0 0.0
CH4 %LEL CO ppm H2S ppm
BUMP TEST APPLY GAS
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