RKI Instruments Gas Tracer - Manual (Page 221)

Gas Tracer Operator’s ManualCalibrating and Bump Testing the PPM Combustible Sensor
bump test.
2. If the instrument is not in a fresh air environment, fill the ga bag
with zero air as described in “Filling the Gas Bag” on page 195.
3. Press and release the POWER ENTER button to enter the AIR CAL
menu item.
NOTE: If you have just performed a DRY fresh air adjustment, allow
the Gas Tracer to sample fresh air for 2 minutes before
continuing.
You will be prompted to choose between WET and DRY.
4. Use the AIR▲ or (SHIFT)▼ buttons to display the WET setting and
press and release the POWER ENTER button. The unit will display
the current fresh air reading and prompt you to push the AIR▲
button.
5. Be sure the Gas Tracer is in a fresh air environment. If the
instrument is not in a fresh air environment, connect a gas bag with
zero air to the rigid tube on the probe using the 6 inch humidifier
MAINTENANCE
AIR CAL
MAINTENANCE
WET
50
ppm
MAINTENANCE
CH
4
PUSH AIR