RKI Instruments Gas Tracer - Manual (Page 145)

Gas Tracer Operator’s Manual Using Maintenance Mode • 137
NOTE: If you have just performed a DRY fresh air adjustment, allow
the Gas Tracer to sample fresh air for 2 minutes before
continuing.
4. Be sure the Gas Tracer is in a fresh air environment.
5. Hold down the AIR▲ button. The unit will prompt you to continue
holding the AIR▲ button.
6. When the unit prompts you to release the AIR▲ button, release it.
The instrument will perform a fresh air adjustment on the ppm
sensor and return you to the AIR CAL menu item.
Performing a Dry Fresh Air Adjustment
This section describes how to perform a fresh air adjustment on the
PPM combustible gas sensor using the DRY setting. Use the DRY
setting with a zero air calibration cylinder for a biannual calibration.
NOTE: It is recommended that you perform a fresh air adjust on the
ppm sensor using a zero air cylinder and the DRY setting
followed by a fresh air adjustment using the WET setting once
every 6 months to maintain the accuracy of the ppm
combustible gas reading. See “Performing a Wet Fresh Air
Adjustment” on page 135 for instructions to perform a WET
fresh air adjustment.
50
ppm
MAINTENANCE
CH
4
PUSH AIR
AIr
CAL
MAINTENANCE
HOLD AIR