Common pressure thermocouple sensor fault

1, pressure, the transmitter to lose also couldn't get on the

the situation, first should check whether the pressure interface is a flat or clogged, if confirmation is not, check the connection mode and check the power supply, such as power supply is normal for a simple pressure to see if the output changes, or review the thermocouple sensor zero output, if no change the thermocouple sensor has been damaged, can be the instrument damage or other aspects of the system as a whole;

2, pressure thermocouple sensor seal problems

output does not change, pressure transmitter and pressure transmitter output changes suddenly, zero pressure transmitter back to not go to, is likely to be pressure thermocouple sensor seal problem. Common is due to seal specifications, tighten the thermocouple sensor after sealing ring is compressed to the thermocouple sensor pressure inside the mouth jam thermocouple sensors, pressure pressure medium into not to go, but suddenly flung wide when pressure seal, pressure thermocouple sensor and change of stress. Rule out the failure is the best way to remove the thermocouple sensor, direct look at zero is normal, if zero normal can replace the sealing ring to try again;

3, transmitter output signal instability

this fault is willing the pressure source of the problem. Pressure source itself is an unstable, is likely to be the instrument or pressure thermocouple sensor anti-interference ability is not strong, the thermocouple sensor itself vibration is very severe and thermocouple sensor fault;

4, transmitter and pointer type pressure gauge control deviation

appear deviation is normal phenomenon, confirmed the normal range of deviation; Finally a kind of trouble is the differential pressure transmitter installation position of zero output. Differential pressure transmitter because of its measuring range is small, the transmitter in the sensing element can affect the output of the differential pressure transmitter. When installation should keep transducer pressure sensitive axis perpendicular to the direction of gravity, adjust the transducer zero after installation fixed to the standard values.

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