This article provides a detailed analysis of the calibration method for the PTS-PTS502 pressure transmitter diffuse silicon liquid and gas pressure sensor, helping users master the correct operating procedures. As a professional guide in the field of flow control equipment, we will provide you with comprehensive technical reference from working principles to practical applications.

I. Working Principle of the Diffused Silicon Pressure Sensor

The diffused silicon pressure sensor is based on the piezoresistive effect principle. When external pressure acts on the sensing element, the silicon diaphragm undergoes slight deformation, causing the resistance value of the embedded Wheatstone bridge to change. This change is converted by the PTS-PTS502 transmitter into a standard electrical signal (such as 4-20mA). Its core advantages lie in high sensitivity (up to ±0.05%FS/℃) and long-term stability (typically ±0.1%FS/year). Compared with traditional ceramic piezoresistive sensors, diffused silicon technology is more suitable for industrial scenarios requiring high-precision measurement, such as constant-pressure water supply systems or petrochemical process control.

II. Preparation Before Calibration

When calibrating the PTS-PTS502 pressure transmitter, it is necessary to prepare a standard pressure source (with accuracy at least 0.1 class higher than the sensor under test), a digital multimeter (resolution 0.01mA), and dedicated debugging software. Special note: when calibrating sensors made of 316 stainless steel in hydraulic systems, medium compatibility must be ensured. The calibration environment should meet: temperature 20±5℃, humidity ≤60%RH, and avoidance of electromagnetic interference. For products such as Domestic Direct Wire Pressure Transmitter CFBPT/B Constant Pressure Water Supply Absolute Pressure Sensor, their temperature compensation range of 0-70℃ can significantly reduce the impact of environmental factors on calibration results.

III. Step-by-Step Calibration Operation Guide

Step 1: Zero Calibration - Under atmospheric pressure, use the ZERO potentiometer on the transmitter or the supporting software to adjust the output to 4.000mA (when the range is 0-100kPa). If using the PTS-PTS503 pressure transmitter, its ±8% zero adjustment range can accommodate more complex working conditions.
Step 2: Full-Scale Calibration - Apply the rated pressure (such as 100kPa) and use the SPAN potentiometer to adjust the output to 20.000mA. Note that the PTS-PTS504 model allows ±20% range adjustment, which is particularly important when handling differences in medium density.
Step 3: Linearity Verification - Test at 25%, 50%, and 75% range points, and the error should be controlled within the 0.25 accuracy class range (≤±0.25%FS).

IV. Common Problem Solutions

Problem 1: Unstable Output Signal - Check whether the power supply voltage is within the 9-36VDC range. Poor grounding is the main cause of 80% of faults. For models such as TMS-QY110, it is recommended to use four-core shielded cables (protection grade IP65) to reduce interference.
Problem 2: Excessive Temperature Drift - Recalibrate temperature compensation to ensure the sensor operates within the medium temperature range of -30～+85℃. The unique ≤±0.05%FS/℃ temperature drift coefficient of the YH-A series products is a better choice.
Problem 3: Overload Protection - When the pressure exceeds 2 times full scale, the 316 stainless steel diaphragm structure of the BP-IN model can effectively prevent permanent damage.

V. Industry Applications and Selection Recommendations

In building automation systems, the ZFBY-ZFBY3801 model with Gl/4 male threaded connection is recommended; for laboratory scenarios requiring 1~10VDC three-wire output, the compact design (diameter only 20mm) of the AO-X series offers greater advantages. The diffused silicon sensors provided by Xi'an Shenghongchuang Instrument Co., Ltd. are all ISO9001 certified, and their M20×1.5 standard threads are compatible with most hydraulic pipelines.

Why Choose Us

As a national high-tech enterprise in Xixian New Area, we have 15 years of accumulated pressure sensing technology experience, and all products adopt laser marking to ensure traceability. For the full series of products from PTS-PTS501 to PTS-PTS504, we provide free technical consultation and 72-hour fault response service. Click to learn the detailed parameters and industry solutions of Domestic Direct Wire Pressure Transmitter CFBPT/B Constant Pressure Water Supply Absolute Pressure Sensor.