How to Install the LRDG-LRDG Diffused Silicon Sensor？3 Key Points to Note

Correct installation of the LRDG-LRDG diffused silicon sensor directly affects measurement accuracy and service life。This article focuses on ZC-316、PT-PT115、YM-bestace661 and other series of diffused silicon pressure transmitters，with an emphasis on analyzing 3 core installation points for models such as C-C23、LRDG-LRDG，helping operators avoid common mistakes and ensuring that sensors such as PT-PT115、CPT-CPT1 deliver optimal performance in liquid and gas pressure monitoring。

1、Environmental Inspection and Preparation Before Installation

Before installing the LRDG-LRDG pressure transmitter，the on-site environment must be systematically evaluated。According to the technical manual requirements of the YM-bestace662 pressure transmitter，the operating temperature should be maintained within the range of -40℃~85℃，and the relative humidity should not exceed 95%。If used for high-temperature medium measurement such as CPT-CPT1，additional heat sinks or cooling devices must be installed。At the same time，it is necessary to confirm that the pipeline interface size matches the G1/2" or NPT1/2" thread specifications of the BBP-1 pressure transmitter，to avoid medium leakage caused by mechanical incompatibility。Special note：CY-4000 series sensors are sensitive to vibration，and the installation location should be at least 1.5 meters away from vibration sources such as pumps and valves。

2、Core Specifications for Mechanical Installation

According to the installation guide for the P-C pressure transmitter，the sensor threaded connection must be wrapped with Teflon sealing tape for 2-3 turns，and the torque should be controlled between 15-20N·m。For directly mounted sensors such as LRDG-LRDG，it should be noted that the medium flow direction arrow marking must be consistent with the pipeline fluid direction。When measuring gas pressure，it is recommended to install the YM-bestace661 transmitter above the pipeline；when measuring liquids，it should be installed on the side to avoid bubble accumulation。Important reminder：The CPT-CPT1 series is strictly prohibited from being installed upside down，otherwise it will cause silicone oil filling fluid leakage and damage the sensing element。

• Orientation requirements：The electrical interface of the C-C23 model should face downward or be horizontal，to prevent water ingress
• Stress relief：The connecting pipeline of the BBP-1 sensor must reserve a straight pipe section of more than 5cm
• Sealing test：After installation，a 15-minute pressure holding test must be performed at 1.5 times the rated pressure

3、Key Points for Electrical Connection and Calibration

According to the wiring diagram specifications of the CY-4000 pressure transmitter，the power cable must use shielded twisted-pair cable，and a signal isolator should be added when the length exceeds 30 meters。Special attention should be paid that the PT-PT115 model uses a two-wire 4-20mA output，and reverse connection of the positive and negative poles will burn out the circuit board。Before power-on，check whether the supply voltage of the ZC-316 sensor matches（standard 24VDC±10%）。Zero calibration should be performed during first use：under atmospheric pressure，adjust the output to 4mA through a HART handheld communicator or local keys。For intelligent products such as YM-bestace662，it is recommended to verify the full range monthly with a standard pressure source。

4、Solutions for Special Media

When measuring corrosive media，the CPT-CPT1 pressure transmitter can be optionally equipped with a tantalum diaphragm isolation assembly。For high-temperature steam applications，the P-C series requires the addition of a siphon pipe for cooling。If the medium is prone to crystallization，the LRDG-LRDG model should be equipped with an optional diaphragm cleaning system。It is worth noting that when the BBP-1 sensor measures viscous liquids，a flush diaphragm design must be adopted to prevent the medium from blocking the pressure tapping hole。

5、Maintenance and Troubleshooting

According to the warranty terms of the YM-bestace661 manufacturer，regular maintenance can extend the service life of the sensor。The O-ring sealing condition of the C-C23 pressure transmitter should be checked every quarter，and the sealing gasket of the process connection should be replaced once a year。Among common faults，output signal fluctuations are mostly caused by power supply interference，and you can check whether the grounding resistance of ZC-316 is less than 4Ω；when PT-PT115 has no output，first check whether the fuse is blown。

Industry Application Case

A petrochemical enterprise used CY-4000 diffused silicon sensors to monitor cracking furnace pressure，and by optimizing the installation position（a vertical pipe section 2 meters away from the reactor），measurement stability was improved by 40%。A food factory installed a sanitary diaphragm in front of the PT-PT115 sensor，effectively solving the problem of jam adhering to the diaphragm。These practices verify the critical impact of correct installation on the performance of transmitters such as CPT-CPT1。

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