RKI Instruments Gas Tracer - Manual (Page 223)

Gas Tracer Operator’s ManualCalibrating and Bump Testing the PPM Combustible Sensor
1. After entering Calibration Mode, and AIR CAL will be displayed.
You must perform a fresh air adjust before performing an auto
calibration, a single calibration, or a bump test.
2. Fill a gas 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.
You will be prompted to choose between WET and DRY.
4. Use the AIR▲ or (SHIFT)▼ buttons to display the DRY 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. Do not press the AIR▲ button at this time.
5. Connect the tubing from the gas bag to the rigid tube on the probe.
Allow the zero air to flow for two minutes.
MAINTENANCE
AIR CAL
MAINTENANCE
WET
50
ppm
MAINTENANCE
CH
4
PUSH AIR