RKI Instruments Gas Tracer - Manual (Page 150)

142 • Using Maintenance Mode Gas Tracer Operator’s Manual
5. You will be prompted to choose between WET and DRY. Use the
WET setting.
NOTE: The DRY setting in ONE CAL is for factory use only. Do not
perform a calibration in ONE CAL using the DRY setting.
6. Use the AIR▲ or (SHIFT)▼ buttons to display the WET setting and
press and release the POWER ENTER button. The gas reading will
be replaced by 3 dashes.
7. Press and release the POWER ENTER button. The single
calibration screen displays. The gas reading flashes.
8. Connect the humidifier from the demand flow regulator to the
rigid tube on the probe. Allow the calibration gas to flow for two
minutes.
9. If necessary, use the AIR▲ and (SHIFT)▼ buttons to adjust the
reading to match the concentration listed on the calibration
cylinder.
If the reading already matches the concentration listed on the
calibration cylinder, press and release the AIR▲ button then press
and release the (SHIFT)▼ button so that the instrument sees a
change and resets the calibration date.
10.Press and release the POWER ENTER button to save the span
value. The LCD will indicate that the calibration has ended, then
the single calibration menu displays.
11.Disconnect the humidifier from the probe.
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ppm
MAINTENANCE
CH
4
ONE CAL
0
ppm
MAINTENANCE
CH
4
ONE CAL