RKI Instruments Gas Tracer - Manual (Page 136)

128 • Using Maintenance Mode Gas Tracer Operator’s Manual
to calibrate (in this example the combustible gas % LEL sensor). If
you have a 5 sensor unit, the %vol sensor will be one of the choices.
It is shown below.
8. Press and release the POWER ENTER button. The single
calibration screen displays for the sensor you selected. The gas
reading flashes.
9. Connect the tubing from the demand flow regulator to the rigid
tube on the probe. Allow the calibration gas to flow for one minute.
10.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.
11.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.
- - -
vol%
MAINTENANCE
CH
4
ONE CAL
0
%LEL
MAINTENANCE
CH
4
ONE CAL
- - -
%LEL
MAINTENANCE
CH
4
ONE CAL