Section 5.3 of "JJG882-2019 Verification Regulation for Pressure Transmitters" addresses the static pressure effect on differential pressure transmitters. According to the table requirements for static pressure influence on differential pressure transmitters, the accuracy class requirements are not high. For example, for a 0.2 class transmitter, the lower limit change under static pressure values 32

Leveraging its own strengths and supplier collaboration, Jiangjing Technology has launched a fully automated verification system for high static pressure differential pressure transmitters. This system can quickly verify the accuracy of static pressure values for differential pressure transmitters.

Key technical parameters of the system:

1. Built-in high-precision static pressure sensor and differential pressure sensor

2. Static pressure module range: (0–20) MPa

3. Differential pressure module range: (0–2000) kPa

4. Pressure accuracy class: 0.02% or 0.05%; electrical signal accuracy class: 0.02% or 0.05%

5. Built-in gas-liquid separator

6. Safety protection devices for overpressure, overcurrent, and pressure module failures

System verification process:

After setting the static pressure value and differential pressure range, press the start button, and the system will automatically perform verification (the system opens the differential pressure bypass valve, automatically applies static pressure, and when the static pressure reaches the set value, it automatically verifies from 0% to 100% of the differential pressure range based on the set number of verification points, automatically recording data). The entire system is easy to operate and enables rapid verification of high static pressure differential pressure transmitters.

For further details about the complete system, please contact Xiamen Jiangjing Technology Co., Ltd. for more information.

About Jiangjing Technology

Xiamen Jiangjing Technology Co., Ltd. is headquartered in the Xiamen Free Trade Zone, Fujian Province. It is an enterprise specializing in the development, production, sales, and after-sales service of metrology calibration equipment. The company professionally provides pressure and temperature metrology calibration equipment and is a technology service-oriented enterprise focused on offering comprehensive metrology calibration laboratory solutions.

With its headquarters in Xiamen, along with a Beijing R&D center, Shanghai operations center, and Guiyang operations center, Xiamen Jiangjing Technology Co., Ltd. provides users with comprehensive technical exchange and rapid service response systems, adhering to a long-term user-centric service philosophy.

The company is committed to independent innovation, providing calibration instruments that are more suitable for metrology calibration personnel. Its pressure and temperature products have applied for over 20 patents and software copyrights and have obtained ISO9001:2015 quality management system certification, AAA enterprise credit rating certificate, and AAA enterprise creditworthiness certificate.

Our mission is to uphold collaborative innovation (Innovation), provide high-quality products (Quality), and deliver excellent services (Services)—collectively known as IQS.

Our value lies in offering comprehensive metrology calibration laboratory solutions and providing continuous services tailored to customer needs.

Our goal is to achieve mutual success with partners and build a customer-centric technology service enterprise.

Xiamen Jiangjing Technology Co., Ltd. has successfully developed the IQS900-X laboratory pressure instrument rapid verification device, IQS800-X portable pressure instrument rapid verification device, IQS600 pressure instrument rapid verification solution, IQS810-X handheld pressure instrument rapid verification device, IQS700 portable pressure generator, IQS830 gas regulator calibration solution, IQS temperature series intelligent dry-well calibrators, constant temperature baths, wireless temperature recorders, wireless pressure recorders, wireless humidity recorders, IQS process calibrators, and other pressure, temperature, and humidity metrology calibration equipment.

The company's products are widely used in metrology institutes, metallurgy, petroleum, chemical, military, power, food, pharmaceutical, railway, shipbuilding, universities, aerospace, third-party calibration, medical devices, machinery manufacturing, and other industries. Some products are also exported to countries such as Argentina, Serbia, Brazil, the United States, Malaysia, the Philippines, South Korea, Thailand, Singapore, and the Democratic Republic of the Congo.