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D11-044-1: Rapidox 1100ZR-H-OL-LC O
2
Analyser Instruction Manual
D11-044-1
29
Last printed 08/11/2016 12:10:00
This is your final chance to change your mind before committing to a calibration.
Check carefully that the gas value on the screen actually matches the value of your
calibration gas before clicking on “Yes” to complete the calibration. At this point
you should observe that the LCD display will reset itself to the correct calibration.
You can now proceed with the rest of the calibration process by selecting the
Middle and Low gases in the same manner.
6.8
Calibration Error Messages
During the calibration process described in 7.7 above it is possible to receive
screen error messages as described here.
1)
Bad Sensor Reading:
The Rapidox software makes a prediction of the
expected sensor mV for each calibration gas value entered. If the mV signal
coming from the sensor is out of the expected range the following message
is displayed:
This normally indicates one of two things: that you are using the wrong cal
gas value compared with the actual gas flowing over the sensor OR the
sensor is getting old and can no longer output the expected signal required
for a healthy calibration.
2)
Bad Pressure Reading:
The Rapidox software checks to see what the gas
pressure is before allowing the calibration to continue. If the pressure is
outside the range -25mbar to +25mbar (gauge) then the following message
is displayed:
This normally indicates that you are allowing gas from a cylinder set at too
high pressure to enter the analyser. Try displaying the pressure reading on
the second line of the LCD and adjusting the gas regulator to trim it close to
0 mbar. If you are using a standard gas regulator then try switching off the
sample pump on the rear of the analyser OR better still use a demand flow
regulator and allow the gas to enter the analyser from the draw of the
pump.