RKI Instruments Gas Tracer - Manual (Page 144)

136 • Using Maintenance Mode Gas Tracer Operator’s Manual
NOTE: It is recommended that you perform a fresh air adjust on the
ppm sensor using a zero air cylinder and the DRY setting
once every 6 months to maintain the accuracy of the ppm
combustible gas reading. When performing a DRY fresh air
adjustment, be sure to not use the humidifier tube. See
“Performing a Dry Fresh Air Adjustment” on page 137 for
instructions to perform a dry fresh air adjustment.
1. Once the warm up is complete, you will be in PPM Cal 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. Press and release the POWER ENTER button to enter the AIR CAL
menu item.
You will be prompted to choose between WET and DRY.
3. 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.
MAINTENANCE
AIR CAL
MAINTENANCE
WET