Cambridge Sensotec Rapidox 1100E Oxygen Analyser Instruction Manual
Version 3.8
24
Last printed 29/08/2012 16:01:00
Figure 10: Remote calibration function
Use the two buttons to calibrate the sensor directly from the PC. Before
calibrating the analyser with gas, make sure that you know the exact O
2
concentration in your gas bottle AND you have a calibration certificate from the
gas supplier confirming the concentration. You can calibrate the analyser in any
order but remember that the gas value for O
2
High must be greater than the gas
value for O
2
Low. Allow sufficient time for the calibration gas to pass over the
sensor and let the reading on the LCD stabilise. This is extremely important to
perform a successful and accurate calibration.
The software uses the two calibration gas values already stored in the Rapidox as a
starting point. These are typically High = 20.95%, and Low = 0.1% as set in the
factory but may be different if the user has recalibrated with other gas values in
the past. Either way you are given an option to change the cal gas value before
proceeding to the actual calibration.
Assuming you are using fresh air (20.95%) to calibrate O
2
High then simply click
on the button labelled “Calibrate High O
2
” to see the following:
Figure 11: The software asks you to confirm if a new sensor has been fitted before starting the
calibration.
The default answer is NO but if you have just replaced the sensor then click yes to
allow the software to make a note of the signal from the new sensor. It will use
this information to gauge the health of the sensor over the coming months and
years. The software next asks you to confirm the value of the cal gas you are using
is correct:
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