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pressure measurement

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PT500-303

Model: pt500-303
Flat film / diaphragm pressure sensing and anti blocking structure design, suitable for melt / fluid medium;
Adopt imported pressure sensitive chip; select the chip technology;
Constant voltage supply, differential bridge output;
Imported elastic materials, precision machining integrated structure, strict machining, heat treatment, aging process;
More than 1 million service life;
High impedance, high precision and high stability; high pressure, impact resistance and fatigue resistance;
Common keywords:
Flat film pressure core membrane pressure core thick film core body
Diaphragm pressure core flush membrane pressure core anti blocking pressure core
Flat film pressure chip, flat film pressure chip, thick film pressure chip

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

Chip:

Flat film / diaphragm pressure sensing and anti blocking structure design, suitable for melt / fluid medium;

Adopt imported pressure sensitive chip; select the chip technology;

High impedance, high precision and high stability;

elastomer:

Wide range (0-50kpa ~ 70MPa / - 100KPA ~ 0 vacuum)

Imported elastic materials, strict machining, heat treatment, aging treatment process;

More than 1 million service life;

Structure:

Thick film structure: deep argon arc welding, connecting elastic material and process joint, high strength, impact resistance, fatigue resistance;

Thin film structure: laser welding, connecting elastic materials and process joints, silicon oil medium transfer pressure, fast response, fatigue resistance, small range;

The overall structure is small and the process connection mode is diversified (m20x1.5, G1 / 2, ZG1 / 2, 1 / 2NPT (thread diameter ≥ 17mm));

Process connection material: 304 or 316;

Four core color wire or enameled wire;

Signal processing:

Constant voltage supply, differential bridge output;

With temperature compensation;

Application:

High pressure sensing core of flat film pressure transmitter;

Melt / fluid / viscous medium pressure measurement and control;

Pressure measurement in other civil / industrial automation fields

Application fields:

Product family:

1、 Technical parameters

Measuring medium: melt, fluid, liquid containing impurities, gas (if: paint, toothpaste, pigment, etc.)

Pressure form: gauge pressure, absolute pressure

Range: 0 ～ 0.6, 1, 2, 5, 10, 15, 20, 25, 30, 40, 50, 60 (MPA);

0～50、100、150、200、300、400、500、600（KPa）

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: 1500 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, ZG1 / 2, 1 / 2NPT (thread diameter ≥ 17mm)

2、 Specification and model

3、 Structural dimensions

4、 Electrical connection

5、 Installation method

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;

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 prohibited from 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;

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 contact 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

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