The KYB-800 pressure transmitter may encounter various fault issues during use, affecting the normal operation of the equipment. This article provides professional solutions for 7 common fault phenomena of diffused silicon liquid and gas pressure sensors, such as abnormal display, accuracy deviation, wiring errors, etc., helping operators quickly troubleshoot and handle problems to ensure the stable operation of flow control equipment.

I. Common Fault Phenomena of the KYB-800 Pressure Transmitter and Solutions

As a core component of flow control equipment, the KYB-800 diffused silicon liquid and gas pressure sensor may fail due to environmental factors, improper operation, or component aging. The following are 7 typical problems and the corresponding handling methods:

1. Abnormal Display Reading or No Display

When the PT124B-210-1MPa-G1/2 pressure transmitter shows an abnormal display, first check whether the 24V power supply is stable （allowable fluctuation range ±10%）, and use a multimeter to measure the input terminal voltage. If the power supply is normal, then check whether the signal output circuit of model DG1300-BZ-B-2-10-CJ-AE is open, and it is recommended to conduct a continuity test according to the circuit diagram in the NS-I pressure transmitter manual. For models such as SK-DBS316E1ERC2L-2m with an LCD display, it is also necessary to check the connection status of the display ribbon cable.

2. Measurement Accuracy Exceeds the Allowable Error

If the HTJ-HTJ110 pressure transmitter shows a deviation above ±0.5%FS, a three-step calibration should be carried out according to the working principle of HTJ-HTJ100: ① zeroing under atmospheric pressure; ② apply standard pressure at 50% of the range and adjust the midpoint potentiometer; ③ apply full-scale pressure to calibrate the endpoint. For models such as LD-108-3PBA793 used under high-temperature working conditions, additional compensation for ambient temperature influence is required.

II. Technical Characteristics and Maintenance Points of Diffused Silicon Sensors

The SMP131-TLD-L105GS-D1-F-53-4G15 pressure transmitter adopts the monocrystalline silicon piezoresistive effect principle, and its core parameters include:

• Accuracy class: 0.2%~0.5%FS （HTJ-HTJ110 can reach 0.1%）
• Long-term stability: ±0.1%/year
• Temperature influence: ±0.02%FS/℃ （for temperature-compensated models）
• Overload capacity: 150% rated pressure

It is recommended to carry out the following maintenance every 6 months according to the requirements of the DG1300-BZ-B-2-0.8-CJ-AE specification model:

1. Clean the pressure port with anhydrous ethanol
2. Check whether the O-ring seal is aging
3. Calibrate zero point and full-scale output
4. Record the sensor response curve

III. Pressure Transmitter Selection and Replacement Solutions

When the KYB-800 needs to be replaced, the following replacement solutions can be considered according to the specification models of diffused silicon liquid and gas pressure sensors:

IV. Why Choose Shenghongchuang Instrumentation

As a high-tech enterprise in Xixian New Area, we provide:

• 18 years of experience in pressure sensor R&D and manufacturing
• The full product series has passed CE and RoHS certification
• 72-hour rapid response service
• Free technical training for models such as LD-108-3PBA793

If you encounter wiring diagram issues with SMP131-TLD-L105GS-D1-F-53-4G15 or NS-I calibration problems, please call 029-XXXXXXX for professional technical support.