Mechanical pressure transmitter: Adjust the zero point by changing the compression degree of the spring through mechanical manual adjustment of the screw or knob. Common brands includeHoneywell, Ashcroft, WIKAWait.

Potentiometer pressure transmitter: adjust the zero point by rotating the potentiometer. Common brands includeRosemount, Endress+HauserWait.

Pressure-degrading pressure transmitter: adjusts the zero point by changing the elasticity of the diaphragm. Common brands includeKeller, ViatranWait.

Digital pressure transmitter: adjusts the zero point through digital signal processing. Common brands includeABB, Siemens, YokogawaWait.

Intelligent pressure transmitter: adjusts zero point through built-in intelligent circuit and microprocessor. Common brands includeEmerson, GEWait.

It should be noted that different brands and models of pressure transmitters may have different methods for adjusting the zero point. The methods listed above are only common methods. At the same time, it should also be noted that different models of pressure transmitters may have different accuracy and reliability requirements, so when selecting and using them, make reasonable selections and operations based on actual needs and application environments.

The following is a detailed description of the zero point adjustment method for common pressure transmitter brands and models:

HoneywellMechanical pressure transmitter:

HoneywellA mechanical pressure transmitter adjusts the zero point by turning an adjustment screw to change the compression of the spring. The specific operation method is as follows:

(1) Turn the adjusting screw to the mark marked"ZERO"Position; (2) Use a pressure gauge or other suitable measuring device to check whether the output signal reaches the expected zero point; (3) If the output signal does not reach the expected zero point, continue to rotate the adjusting screw until the output signal reaches the expected zero point.

RosemountPotentiometer pressure transmitter:

RosemountThe potentiometer pressure transmitter adjusts the zero point by rotating the potentiometer. The specific operation method is as follows:

(1) Turn the potentiometer to the mark marked"ZERO"Position; (2) Use a pressure gauge or other suitable measuring device to check whether the output signal reaches the expected zero point; (3) If the output signal does not reach the expected zero point, continue to rotate the potentiometer until the output signal reaches the expected zero point.

KellerPressure degradation pressure transmitter:

KellerPressure-degrading pressure transmitters adjust the zero point by changing the elasticity of the diaphragm. The specific operation method is as follows:

(1) Connect the pressure transmitter to the calibration equipment and set the signal output by the calibration equipment to zero; (2) Use a manual pump to gradually increase pressure until the output signal reaches the expected zero point; (3) If the output signal does not reach the expected zero point, continue to adjust the elasticity of the diaphragm until the output signal reaches the expected zero point.

ABBDigital pressure transmitter:

ABBDigital pressure transmitters use digital signal processing to adjust the zero point. The specific operation method is as follows:

(1) Use device connection software to connect the pressure transmitter to the computer; (2) Set the calibration software on the computer to zero point calibration mode; (3) Use calibration software to gradually adjust the output signal until the desired zero point is reached.

EmersonIntelligent pressure transmitter:

EmersonIntelligent pressure transmitters adjust the zero point through built-in intelligent circuits and microprocessors. The specific operation method is as follows:

(1) Use smart calibration equipment to connect the pressure transmitter with the computer; (2) Use calibration software to set the intelligent calibration device to zero-point calibration mode; (3) Use calibration software to gradually adjust the output signal until the desired zero point is reached.

Yokogawadifferential pressure transmitter:

YokogawaThe differential pressure transmitter adjusts the zero point by rotating the adjustment screw to change the compression of the spring. The specific operation method is as follows:

(1) Turn the adjusting screw to the mark marked"ZERO"Position; (2) Use a differential pressure gauge or other suitable measuring device to check whether the output signal reaches the expected zero point; (3) If the output signal does not reach the expected zero point, continue to rotate the adjusting screw until the output signal reaches the expected zero point.

SiemensDigital pressure transmitter:

SiemensDigital pressure transmitters use digital signal processing to adjust the zero point. The specific operation method is as follows:

(1) Use device connection software to connect the pressure transmitter to the computer; (2) Set the calibration software on the computer to zero point calibration mode; (3) Use calibration software to gradually adjust the output signal until the desired zero point is reached.

It should be noted that the zero point adjustment methods of different brands and models of pressure transmitters may be different. Therefore, before performing adjustment operations, you should first check the corresponding operation manual or consult the manufacturer's technical support personnel to ensure the correct operation method.