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What are the debugging methods of pressure sensors

by:Rika Sensors     2021-11-26
What are the debugging methods of the pressure sensor?

1: Whether the pressure sensor power supply is normal. If it is less than 12VDC, check whether there is a large load in the loop. The input impedance of the pressure sensor load should conform to RL≤(pressure sensor supply voltage -12V)/(0.02A)Ω


2: Whether the actual pressure exceeds the selected range of the pressure transmitter, reselect a pressure sensor with an appropriate range.



3: Whether the pressure sensor is damaged, severe overload sometimes damages the isolation diaphragm, and needs to be sent back to the manufacturer for repair.



4: Whether the wiring is loose, connect the wiring and tighten it.



5: Whether the power cord wiring is correct, the power cord should be connected to the corresponding terminal.






How to debug if the pressure indication is incorrect:

1: Whether the pressure sensor power supply is normal. If it is less than 12VDC, check whether there is a large load in the loop. The input impedance of the transmitter load should conform to RL≤(transmitter supply voltage -12V)/(0.02A )Ω

2: Whether the reference pressure value must be correct, if the accuracy of the reference pressure gauge is low, it needs to be replaced with a higher accuracy pressure gauge.

3: Whether the range of the pressure indicating instrument is consistent with the range of the pressure transmitter, the range of the pressure indicating instrument must be consistent with the range of the pressure transmitter

4: Whether the input of the pressure indicating instrument and the corresponding wiring are correct.

The input of the pressure indicating instrument is 4-20mA, the output signal of the transmitter can be directly connected; if the input of the pressure indicating instrument is 1~5V, it must be connected to the input end of the pressure indicating instrument and a precision A resistance of one-thousandth and above with a resistance value of 250Ω, and then connect to the input of the transmitter.

5: The input impedance of the transmitter load should conform to RL≤(transmitter supply voltage -12V)/(0.02A)Ω

If it does not meet the requirements, corresponding measures can be taken according to its differences: such as increasing the supply voltage (but must be lower than 36VDC), reducing the load, etc.

6: Whether the input end of the multipoint paper recorder is open when it is not recording; if it is open, 1), no other load can be carried; 2), use another recorder with input impedance ≤250Ω when there is no recording.

7: Whether the corresponding equipment shell is grounded The equipment shell is grounded

8: Whether to separate the wiring from AC power and other power sources and separate the wiring from AC power and other power sources.

9: Whether the pressure sensor is damaged, severe overload can sometimes damage the isolation diaphragm. It needs to be sent back to the manufacturer for repair.

10: Whether there is sand, impurities, etc. in the pipeline that block the pipeline, which will affect the measurement accuracy when there are impurities; it is necessary to clean the impurities and add a filter before the pressure port.

11: Whether the temperature of the pipeline is too high, the operating temperature of the pressure sensor is -25~85℃, but in actual use it is within -20~70℃. Add a buffer tube to dissipate heat. Add some cold water to the buffer tube before use to prevent the superheated steam from directly impacting the sensor, which may damage the sensor or reduce its service life.


Hunan Rika Electronic Tech Co.,Ltd thinks that a good rule of thumb to determine whether you're working on a project.
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