1. The difference between pressure transmitter and pressure sensor
Pressure transmitter and pressure sensor both play an important role in measuring pressure, but they are not exactly the same. Simply put, a pressure sensor is a sensing device that can convert pressure into an electrical signal. The pressure transmitter converts the signal of the pressure sensor into a standard signal and outputs it to the controller or computer for processing.
Specifically, the pressure sensor can only detect and output the pressure signal, but does not have the function of outputting a standard signal. Pressure transmitters usually have built-in amplification circuits and standard signal output circuits, so they can convert the signals received by the sensors into standard signals (such as 4-20ma or 1-5v).
2. Steps for zeroing the pressure transmitter
I believe everyone has understood the importance of the pressure transmitter. The following will introduce the steps for zeroing the pressure transmitter:
2.1 Check the surrounding environment:
When adjusting the pressure transmitter, the surrounding environment must be checked first.
2.2 Check whether the certificate and experimental expiration time of the standard device have expired:
Check whether the standard device, certificate, experimental expiration time, etc. meet the requirements.
2.3 Connect the standard device and the pressure transmitter:
Use the necessary tools to connect the standard device to the pressure transmitter. The connection method can be determined according to specific requirements.
2.4 Set and calibrate the standard device:
During the calibration process, the standard device needs to be set, such as the output signal value and standard temperature; some digital displays can be set directly.
2.5 Verify the reading:
After setting the standard, you can calibrate the reading through a digital display or other device.
2.6 Zero adjustment:
After turning on the power, adjust the analog output to the minimum value to complete the zero adjustment.
2.7 Recalibrate:
After the calibration is correct, unplug the device from the test and calibrate it with the standard. After the calibration, restore the device to normal working state.
2.8 Record the calibration results:
During the calibration process, it is necessary to record the calibration date, pressure transducer model, batch number, specifications, readings before and after calibration, errors and other data for future use.
In short, pressure transmitters play a very important role in industrial automation and control. In order to play this role, we need to master the adjustment method, follow the technical specifications, adhere to the actual work, and do a good job of daily maintenance to ensure the stable operation and long-term use of the equipment.
