Oxygen index meter repair and maintenance
Qingdao Zhongbang Instrument Co., Ltd. Equipment Technical Support
　 First, the instrument fault diagnosis and processing methods
malfunction
the reason
Approach
The pipeline is not ventilated
1, N2 or O2 cylinder total valve, pressure relief valve is not open or the pressure is not enough
2, N2 or O2 regulator valve open in the end
Open and adjust
Reconditioning
Flow control valve screw does not advance
Screw thread
Replace the screw
The instrument has a loud sound after ventilation
N2 or O2 regulator valve spring shift
Adjustment
Digital display can not reach fullness
Sensor life exceeded
Replace sensor
Second, the instrument maintenance 1, the instrument if not used for a long time, it is recommended to remove the oxygen sensor, into the refrigerator freezer to extend the life of the sensor (detailed removal steps see step three).
2. Please read the user's manual and oxygen index test related national standards before opening the instrument, and be familiar with the correct use of the oxygen index meter and the calculation of the oxygen index value.
3, the test sample, the remaining part of the well-preserved, so that the value of the instrument in the future comparison test to determine the stability of the instrument, if more than the original accuracy level, should consider replacing the oxygen concentration sensor.
Third, the replacement of oxygen sensor 1, cut off the power and air supply.
2, remove the screws on both sides of the panel, grab the "regulator" valve knob and pull it out.
3. Unplug the three-pin connector on the center of the back panel of the instrument, remove the oxygen sensor counterclockwise (the face is a pentagonal shape), replace it with a new sensor, and insert the plug and reinstall the panel.
4, can be used after correcting fullness.
Fourth, note 1, the use of the specified voltage, instrument power should have a ground wire.
2. When testing samples, some materials release toxic and harmful gases. It is recommended that the test should be conducted in a fume hood and be well-protected.
3. When using liquefied gas, natural gas, gas and other gas sources, the pipeline interface should not be leaky, and the aging of the ventilation pipe should be promptly replaced.
4, the operator can not leave the test site during the test.
5, computer-controlled equipment should prevent the invasion of the virus.
6, the laboratory equipped with fire fighting equipment.
7. Close all power and gas sources at the end of the test.
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