HX-131 Pressure Transmitter Calibration Method，Easily Master Precision Measurement Techniques

Mastering the HX-131 pressure transmitter calibration method is crucial for accurate measurement。This article details the calibration steps for diffused silicon liquid and gas pressure sensors，covering the key operating points of multiple transmitter models such as DTT01，KRS316，helping users quickly troubleshoot common faults in equipment such as ES-20，and ensuring the measurement accuracy and stability of equipment such as IP-B pressure transmitters。

I、Core Principles of Diffused Silicon Pressure Transmitter Calibration

Diffused silicon pressure transmitters convert pressure into electrical signals through the semiconductor piezoresistive effect，with the silicon sensing element manufactured using MEMS technology as the core component。Taking the HX-131 pressure transmitter as an example，when the medium pressure acts on the isolation diaphragm，the Wheatstone bridge of the silicon chip generates an mV-level voltage signal proportional to the pressure，which is processed by the amplifier circuit and outputs a standard 4-20mA or 0-10V signal。During calibration，special attention should be paid to three dimensions：zero drift，full-scale linearity，and temperature compensation，which are also common sources of error for models such as DTT01，KRS316。According to the GB/T 17614.3-2015 standard for transmitters used in industrial process control systems，the permissible error of 0.2 class accuracy equipment should not exceed ±0.2% of the range。

II、Standard Calibration Equipment and Operating Procedure

III、Step-by-Step Calibration Operation Guide

Step 1：Zero Calibration——Disconnect the pressure connection，after the HX100 pressure transmitter is powered on and warmed up for 30 minutes，use a dedicated adjustment screw or HART communicator to control the deviation of the 4mA output point within ±0.02mA。Special attention should be paid that the SK-2031 pressure transmitter must first release the installation stress。

Step 2：Full-Scale Calibration——Apply the rated pressure to the IP-B pressure transmitter，adjust the span potentiometer so that the error between the 20mA output and the theoretical value does not exceed ±0.05%。The accuracy classes of diffused silicon liquid and gas pressure sensors vary，for example，the permissible error of ES-20 0.5 class equipment is ±0.5% of the range。

IV、Typical Fault Handling Solutions

• Large Signal Fluctuation：Check the power supply voltage stability of the KDX800 pressure transmitter，the 24VDC fluctuation should be less than ±1V
• Zero Drift：The AYT-AYT316 pressure transmitter needs to undergo temperature cycle aging treatment again
• Output Saturation：The DTT01 pressure transmitter may have diaphragm deformation caused by overload，and the sensor core needs to be replaced

V、Industry Applications and Maintenance Recommendations

In the petrochemical industry，the KRS316 pressure transmitter needs online calibration every 3 months；the pharmaceutical industry requires GMP compliance verification for the HX-131 pressure transmitter before each production batch。It is recommended to establish equipment files to record each calibration data，which is crucial for analyzing the long-term stability of equipment such as YP-P2。Experience in faults and handling of diffused silicon liquid and gas pressure sensors shows that 80% of problems originate from mechanical stress caused by improper installation。

VI、Frequently Asked Questions

Q：How to determine whether SK-2031 needs recalibration？
A：When the measured value deviates from process parameters，the output signal changes stepwise，or the routine maintenance cycle is reached（usually 6-12 months）

Q：What special requirements does the IP-B pressure transmitter wiring diagram have？
A：The shielded cable needs to be grounded at one end，twisted pair cable should be used when the signal cable length exceeds 30 meters，and parallel routing with power cables should be avoided

Why Choose Professional Calibration Services？

We provide laboratory calibration compliant with the ISO/IEC 17025 standard，equipped with devices such as the Fluke 729 automatic pressure calibrator，and can issue calibration reports with the CNAS mark。For special models such as HX-131，we have also developed a rapid calibration procedure with temperature compensation，shortening the traditional 8-hour process to 2 hours。Contact our technical engineers now to obtain a customized calibration solution！