Pressure and level transmitter

Pressure and level transmitter instructions I. product use This product is suitable for petroleum, chemical industry, sewage treatment, constant pressure water supply, environmental protection, machinery, metallurgy, electric power, military industry and other fields for surface pressure, absolute pressure measurement, can also measure negative pressure, and is suitable for various occasions all-weather environment and all kinds of liquid, gas, steam pressure measurement and control. Ii. Product features （1）good stability, long-term stability of zero and full degree up to 0.2%FS/ year. Within the scope of compensation temperature - 30 ~ 70 ℃, the temperature drift less than 0.2% FS, throughout the allowed working temperature range is less than 0.5% FS. （2）Can be used to measure the reaction with 316 stainless steel liquid, gas, steam. （3）Solid structure, no moving parts, high reliability, long service life. （4）From wind pressure to water and oil, high-precision measurement can be carried out regardless of the mass of the medium under test. （5）Easy installation, simple structure, economical and durable. Iii. Working principle Using piezoresistive pressure sensor principle, manufactured by silicon micro mechanical processing technology, pressure sensitive chip USES the imported, the chip is encapsulated within the 316 l stainless steel shell, and filling and filling silicone oil, medium pressure on stainless steel isolation diaphragm, by silicone oil to the sensitive chip, so as to output a linearly with the pressure is directly proportional to the voltage signal of change, after transformation of amplifying circuit, current, voltage output. Iv. Technical parameters

Note: medium temperature over 70 ℃ high temperature parts. Fifth, the transmitter wiring

1. Two-wire system current output wiring mode

Compact pressure transmitter	Terminal 1/ red	T   he power is
	Terminal 2/ blue	The signal is
Integral throw type Level transmitter	red	The power is
	blue	The signal is

2 . Three-wire system voltage output wiring mode

3 . RS485 output wiring mode

Six, installation （1）Choose a place that is easy to operate and maintain for installation. （2）Should be as far away from the source of vibration installation. （3）It should be installed away from heat source as far as possible. （4）Hersman type operation, hersman joint and shell connection can not be rotated. （5）During installation, check whether the field interface is consistent with the product interface according to the connection mode and thread type of the product. Tighten it slowly during connection. Torque cannot be directly added to the transmitter housing, but only on the hexagon of the pressure interface. (6) the static pressure that may be generated by the medium in the installation site shall not exceed the measuring range of the transmitter. If the pressure system has instantaneous overpressure, the overload range of the transmitter shall meet the requirements of the system and be equipped with buffer valve. The overload pressure of the transmitter shall not exceed 1.5 times of the measuring range.(7) the measuring medium shall be compatible with the structural material of the transmitter(8) the measuring medium shall not block the pressure inlet hole of the transmitter (9) when installing the input type liquid level gauge, it shall be slowly put in or put forward. It is strictly prohibited to pull the cable or hard object strongly and directly squeeze the transmitter diaphragm to avoid damage to the transmitter.(10) the installation direction of the input type liquid level gauge is vertical downward. When it is used in moving water, attention should be paid to making the water flow direction of the pressure sensitive surface of the transmitter parallel. The measuring medium shall not block the pressure hole of the transmitter. (11) in case of any problem during the installation and use of the product, please contact our company. In case of any abnormality of the product, please turn off the power, stop using, check, or directly contact our technical department. Seven, debugging Transmitter has been strictly calibrated before delivery, users do not need to calibrate. As the sensor diaphragm is filled with silicon oil, the installation position is different, which will generate certain pressure on the sensor chip, the maximum pressure can be 200Pa (such as forward and backward), at this time, the need for zero clearing operation. Viii. Instructions for ordering 1、The environment in which the transmitter is used.2、Measuring range.3、Connection threads.4、Measuring medium. 5, power supply voltage 6, output signal 7, medium temperature 8, precision 9, display mode 10, electrical interface.