Abnormal display of the MBS-G3131 pressure transmitter is a common issue at industrial sites，directly affecting production safety and data accuracy。As a high-tech enterprise focused on pressure sensor R&D for 20 years，Xi’an Shenghongchuang analyzes 5 typical fault phenomena and quick troubleshooting solutions for diffused silicon liquid and gas pressure sensors，covering core issues such as YM series calibration principles and YD-322 accuracy calibration，helping operators locate the root cause of display abnormalities within 10 minutes。

1、5 common fault types of abnormal pressure transmitter display

When the MBS-G3131 pressure transmitter has an abnormal display，it is usually manifested as value jumps，zero return，full scale，or error code display。According to on-site service cases compiled by the Xi’an Shenghongchuang technical team，80% of issues are concentrated in the following 5 categories：signal fluctuation caused by power supply interference（accounting for 35%），sensor diaphragm scaling or corrosion（28%），wiring terminal oxidation（18%），temperature compensation failure（12%），and loss of calibration parameters（7%）。In particular，the domestic general-purpose pressure transmitter PCB water pressure oil pressure air pressure sensor made of 316L stainless steel has excellent corrosion resistance，but the diaphragm condition still needs to be checked regularly in harsh environments such as petrochemical plants。

1.1 Power supply interference diagnosis and handling

When the displayed value jumps irregularly，first use a multimeter to measure whether the supply voltage is stable within the 24VDC±10% range。There was once a case in the aerospace field where a solenoid valve and transmitter shared the same power supply，causing the YM-1QQ model output signal to be superimposed with 400Hz interference waves，which was resolved by adding a power supply filter。It is recommended to use an independent power supply module for critical equipment，and check whether the grounding resistance is less than 4Ω。

1.2 Sensor diaphragm condition inspection

The core component of a diffused silicon pressure sensor is the 316L stainless steel diaphragm。If the medium contains solid particles or crystals，it may cause the displayed value of the YM-130 model to remain high。A metallurgical enterprise once experienced diaphragm scaling caused by impurities in cooling water，and normal operation was restored after circulating cleaning with a 5% citric acid solution。For corrosive media，it is necessary to confirm whether it exceeds the specified media compatibility range of the domestic general-purpose pressure transmitter。

2、Troubleshooting process for abnormal technical parameters

According to the GB/T 17614-2015 standard，when the pressure transmitter display is abnormal，inspection should be carried out in the following order：signal output→power supply system→mechanical connection→environmental factors。For specific operation，refer to Chapter 7 of the YM-1XH pressure transmitter manual，with focus on checking：

3、Calibration and accuracy recovery solutions

When the displayed value of the YM-1KGR pressure transmitter deviates from the actual pressure，calibration must be performed according to JJG 882-2019 regulations。The on-site service provided by Xi’an Shenghongchuang includes：

1. Zero calibration：adjust the potentiometer under atmospheric pressure so that the output is 4.000mA
2. Full-scale calibration：apply standard pressure（such as 4000kPa for the DMK331-250-4000 model）and adjust to 20.000mA
3. Linearity test：select 25%，50%，75% range points to verify that the error is ≤0.25%

4、Why choose Xi’an Shenghongchuang

As a national high-tech enterprise in Xixian New Area，we provide the aerospace，power and other industries with：

• 20 years of diffused silicon sensor R&D experience，with accuracy up to 0.1%FS
• Full range of products certified by CE，RoHS
• 72-hour emergency service response mechanism
• Support for customized modification of models such as YM-115

Call 029-xxxxxxx now to obtain the YD-322 pressure transmitter troubleshooting solution，or visit the official website to view the technical parameters of the domestic general-purpose pressure transmitter PCB water pressure oil pressure air pressure sensor。