H E Y E R P a s i t h e c
Rev. 0.2 Draft – 12/09 HEYER Pasithec, Operator’s manual 77 / 106
Step 3
Press the NEXT knob to perform the calibration.
During calibration, the word “Calibrating” displays on the screen.
“Calibration successful” will be displayed in the window after the calibration is completed successfully.
Reinstall the Gas Sensor to the breathing system. Select “Finish” to complete the calibration.
8.4 Maintaining O
2
Sensor
Perform the calibration periodically; refer to section 8.2.1.
When the machine is not in operation, avoid placing the O
2
sensor in a high oxygen concentration to
increase its life.
The O
2
sensor’s useful life is 12 months.
SV-03A is the O
2
sensor recommended by the manufacturer.
CAUTION: For more detailed information, refer to technical data that is regularly
updated by the manufacturer.
The effect of temperature on the performance of a capillary barrier O
2
sensor is relatively small.
Changing the temperature from +20°C to -20°C will t ypically result in 10% loss of the output signal. In
contrast, temperature has a much greater effect on solid membrane O
2
sensors. The diffusion of gas
across the membrane is an activated process and as a result has a large temperature coefficient.
Typically a 10°C change of temperature doubles the output signal from the sensor. Solid membrane
O
2
sensors require temperature compensation as a result, and many have thermistors in them.
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