RKI Instruments GX-2001 Manual - Manual (Page 34)

29 • Calibration Model GX-2001 Operator’s Manual
5. Press the MODE/POWER button again. You may now check the
current auto calibration settings of the unit’s gas sensors, beginning
with oxygen. In the upper left corner of the LCD, the word, “CAL,” and
the name of the gas sensor being checked will flash alternately. The
LCD will also show the current auto calibration setting (e.g., 12.0% for
O
2
).
To skip checking the autocalibration settings, go to step 6.
To check the autocalibration settings, press either the DISP or AIR
button to check the current auto calibration setting of the next gas
sensor. (By using the DISP or AIR button, you will be able to cycle
through all the sensors.)
NOTE: The auto calibration settings should match the gas concentration
levels in the four-gas (or three-gas) cylinder. They cannot be
changed in the Auto Calibration menu. If an auto calibration
setting must be changed to match a cylinder concentration, the
datalogging software must be used, so the Datalogging/Charger
Station, 49-2156RK, must be used.
6. Press the MODE/POWER button to proceed. The current gas reading is
shown. Press the DISP or AIR button to scroll through the gasses.
7. Attach the regulator to the cylinder. The fixed flow regulator
automatically starts introducing the calibration sample to the sensors.
8. Let the gas flow for two minutes, then press the MODE/POWER button
to perform auto calibration for all sensors.
NOTE: If “FAIL” displays on the LCD and the buzzer sounds while auto
calibration is being performed, you may need to replace sensor(s),
as described in “Replacing a Sensor.” Press the MODE/POWER
button to see what sensors have failed.
9. The Model GX-2001 will enter its start-up sequence if no sensors have
failed the auto calibration.
10. Remove the regulator from the cylinder, remove the adapter plate from
the unit, then store the contents of the calibration kit in a safe place for
future use. The tubing may be left on the adapter plate for convenience.