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Product parameters
Specification parameter
Ordering considerations
Precautions for use
Common problem
Proposal

Product description of strain type pressure transmitter:

Chip:
Adopt imported pressure sensitive chip; select the chip technology;
High impedance, high precision and high stability;

elastomer:
Imported elastic materials, precision machining integrated structure, strict machining, heat treatment, aging process;
The highest range is 500MPa, and the safety failure pressure is over 750MPa;
More than 1 million service life;
High impedance, high precision and high stability; high pressure, impact resistance and fatigue resistance;

Structure:
Integral structure, without welding connection;
Process connection seal: taper seal, face seal, spherical seal, high strength, impact resistance, fatigue resistance;
Compact and reliable overall structure;
Four core color wire or enameled wire;

Signal processing:
Constant voltage supply, differential bridge output;
With temperature compensation;

Application:
Pressure sensing core of pressure transmitter;
Pressure sensor core;
Pressure measurement in other civil / industrial automation fields

Application fields:

Steam supply system
Oil pressure system
Metallurgical equipment
petrochemical industry

Product family:

Specification parameter

1、 Technical parameters
Measuring medium: liquid and gas (compatible with connecting materials of product process)
Pressure form: gauge pressure, absolute pressure
Range: 0-70, 100, 150, 200, 250, 300, 350, 400, 450, 500 (MPA)
Comprehensive accuracy: ± 0.25% FS; ± 0.5% FS; ± 1% FS
Non linear: ≤ 0.25% FS
Repeatability: ≤ 0.1% FS
Output signal: 1.0 ± 0.5mv/v (four wire system / six wire system) differential bridge output
Power supply voltage: constant voltage: 5VDC (3-10vdc)
Insulation impedance: ≥ 1000m Ω / 100VDC
Output impedance: 1650 Ω
Medium temperature: - 20-80 ℃
Ambient temperature: - 20 ～ 70 ℃
Compensation temperature: 0 ～ 70 ℃
Response time: ≤ 5ms
Overload pressure: 150% FS
Failure pressure: 3 times of range (range less than 200MPa); 2 times of range (range greater than 201mpa)
Electrical connections: direct leads
Protection grade: IP65
Connecting cable: four core color cable, standard length: 50mm
Connecting material: imported elastomer material
Process connection: M20x1.5, G1/2, G1/4, ZG1/4, 1/4NPT, ZG1/2, G3/8, M12x1.5

2、 Specification and model

3、 Structural dimensions

4、 Electrical connection

5、 Installation method

Ordering considerations

1. Product range selection:
In order to achieve the best effect of product accuracy, life, stability and other functions, the range selection of the product is calculated by referring to the following formula:
Range = x (1.2-1.5) times of the maximum system pressure;
The actual measuring pressure range of the product should be 15% - 80% of the range;

2. Product power supply and output:
The power supply of pressure core is constant voltage source (3-10vdc);
The core output is differential bridge output;
The output signal is about (0.6-1.5) MV / V

3. The user should understand the measurement medium characteristics of the product:
Medium specification, medium temperature, medium purity (whether containing impurities or particles, etc.);

4. Users should understand the installation environment and installation method of the product:
Indoor or outdoor installation;
Ambient temperature;
Required sealing level;
Vibration range of equipment;
Installation method: thread, flange, special structure;
Whether the installation space meets the overall dimension of the product;

Precautions for use

The power supply of the product is constant voltage power supply, 5VDC (range: 3-10vdc);

It is strictly prohibited to use hard objects (such as screwdriver, finger, iron nail, etc.) to make the pressure core body under pressure measurement output;

The power and signal wires shall be correctly wired according to the specifications of the ordered products;

During product installation, the stressed part is "process connection hexagon wrench position", and the wrench specification corresponds to hexagon;

It is strictly prohibited that the medium temperature, pressure range and excitation voltage of the tested system exceed the rated use range of the transmitter;

Pay attention to the protection of the lead of the pressure core. When it is connected with the amplification conditioning board or the acquisition card, the lead is strictly prohibitedfrom being pulled;

The pressure core is a precision measuring instrument. Do not force impact or smash to avoid damaging the core

The product is installed in a ventilated, dry and non corrosive environment, and installed in the open with protective devices to avoid direct sunlight;

No water or water leakage is allowed for the product instrument, and protective devices shall be installed in the open air to avoid direct sunlight;

Common problem

Question 1: no output of pressure core?
Reason--------------------------Processing method
Lead open circuit--------------Check leads and repair
Broken Bridge------------------Unable to repair, replace
Poor wire connection----------Rewiring

Question 2: is the pressure core output correct?
Reason----------------------------------------Processing method
Wrong bridge and road connection-------Connect the wires correctly according to the product instructions
External force on chip sealing-------------Check and remove external force
Core or chip damage-----------------------Unable to repair, replace

Question 3: unstable pressure core output information?
Reason-----------------------------------------------------------Processing method
Poor wire contac------------------------------------------------Check leads and repair
External force on chip sealing--------------------------------Check and remove external force
Power supply of constant voltage source is unstable-----Check and repair
Input impedance mismatch of constant voltage source--Replace
Insufficient power of constant voltage source-------------Replace
Overpressure or large impact of elastomer-----------------Replace
Poor insulation--------------------------------------------------Check and repair

Proposal

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