I. Overview
KYB compact pressure transmitter has high sensitivity, high accuracy, and strong overload resistance. Made with imported sensors, the sensors and amplification circuits are highly integrated; All stainless steel is integrated, and the zero point and gain of the circuit do not need to be adjusted; Strong anti-interference ability, acid and alkali resistance, long-term stability and reliability.

2、 Working principle
The KYB compact pressure transmitter uses imported pressure chips, and the sensitive components are formed by diffusion or ion implantation processes to form resistors and connected into a Wheatstone bridge. The pressure sensitive diaphragm is formed under the bridge using micro machining technology. When pressure is applied to the diaphragm, the resistance value changes and a linearized output signal proportional to the applied pressure is generated. We add a DC power supply to the Wheatstone bridge, which produces an output of a DC voltage signal. After a secondary conversion circuit, achieve a two-wire system with 4-20mA output.

3、 Functional Features
Good stability, with a long-term stability of 0.2% FS/year at full and zero positions. Within the compensation temperature range of 0-70 ℃, the temperature drift is less than 0.2% FS, and within the entire allowable operating temperature range, it is less than 0.5% FS.
Equipped with reverse protection and current limiting protection circuits, the transmitter will not be damaged if the positive and negative poles are reversed during installation. In case of abnormalities, the transmitter will automatically limit the current to within 35MA.
Solid state structure, no movable parts, high reliability, long service life.
From wind pressure to water and oil, high-precision measurements can be made without being affected by the mass of the measured medium.
Easy to install, simple structure, economical and durable.

4、 Main technical parameters

5、 Structural characteristics
Shell: All stainless steel integrated
Main structural material: 31618Cr-12Ni-2.5Mo
Pressure interface: M20 × 1.5
Self weight: 1kg for regular type, 1.2kg for type with watch head

6、 External dimensions

7、 Debugging method
Open the HSM connector, unscrew the stainless steel tube, and you can see the zeroing and full range resistors. Connect an external standard power supply and ammeter (0.2 poles or more) to adjust them. The steps are as follows:
Without applying pressure to the transmitter, adjust the zero point resistor to output a current of 4mA,
Pressurize the transmitter to full range, adjust the full range resistor to output a current of 20mA,
Repeat the above steps two or three times until the signal is normal.
After adjustment, tighten the protective cover.
8、 Precautions
All supplied products come with user manuals and certificates of conformity, which include product numbers, technical parameters, manufacturing dates, etc. Please carefully check to avoid using them incorrectly.
Do not directly squeeze the transmitter diaphragm with hard objects to avoid damaging the transmitter.
During installation, the on-site interface should be checked for consistency with the product interface based on the product connection method and thread type. The connection should be tightened slowly, and torque should not be directly applied to the transmitter housing, but only to the six sides of the pressure interface.
When connecting the power supply, strictly follow our company's wiring instructions for connection.
The overload pressure of the edge feeder should not exceed 200% of the measuring range.
If any abnormalities are found during use, the power should be turned off, the use should be stopped, and inspection should be carried out, or the technical department of our company should be contacted directly.
During transportation and storage, the original packaging should be restored and stored in a cool, dry, and ventilated warehouse.
Exchanging for one year.

9、 Electrical Connection Diagram