196 • Calibrating and Bump Testing the PPM Combustible Sensor Gas Tracer Op
-
4. Press and release the POWER ENTER button. The gas reading will be replaced
by 3 dashes.
5. Press and release the POWER ENTER button. The single calibration screen
displays for the sensor you selected. The gas reading flashes.
6. Connect the humidifier from the gas bag to the rigid tube on the probe. Allow
the calibration gas to flow for two minutes.
7. 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.
8. Press and release the POWER ENTER button to save the span value. The LCD
will indicate that the calibration has ended, then the ONE CAL menu item
displays.
9. Disconnect the humidifier from the probe.
NOTE:
Grasp the humidifier tube assembly by the clear tubing at the end, not
the humidifier tube itself.
10. Use the (SHIFT)
▼
button to navigate to the ESCAPE menu item, then press
and release the POWER ENTER button to return to the PPM CAL menu in
Calibration Mode.
11. Use the (SHIFT)
▼
button to navigate to the NORMAL menu item, then press
and release the POWER ENTER button to return to Measuring Mode.
- - -
ppm
MAINTENANCE
CH
4
ONE CAL
0
ppm
MAINTENANCE
CH
4
ONE CAL
