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PT500-304
    Model: PT500-304
    Keywords imported pressure sensitive chip; selected chip mounting technology;
    Imported crystal element, high performance, all solid state, high reliability;
    Constant current source 1.5mA power supply, differential bridge output;
    More than 1 million service life;
    High impedance, high precision, small measuring range, high stability;

    Common keywords:
    Diffused silicon pressure core oil filled pressure core diffused silicon pressure chip
    Micro pressure core negative pressure core absolute pressure chip
    Product description of strain type pressure transmitter:


    Chip:

    Keywords imported pressure sensitive chip; selected chip mounting technology;

    Imported crystal element, high performance, all solid state, high reliability;

    Constant current source 1.5mA power supply, differential bridge output;

    High impedance, high precision, small measuring range, high stability;

    elastomer:

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

    The pressure sensitive film adopts imported elastic material, precision machining integrated structure, strict machining, heat treatment and aging treatment process;

    The highest range is 100MPa, and the safety failure pressure is over 150MPa;

    More than 1 million service life;

    Structure:

    Thick film structure: deep laser welding, connecting elastic material and shell, high strength, impact resistance, fatigue resistance;

    Thin film structure, silicone oil medium transfer pressure, fast response, fatigue resistance, small range;

    The overall structure is small, with various process connection methods (diameter 19mm, 13mm, DN50, DN100, etc.);

    Process connection material: 316;

    Four core color wire or enameled wire;

    Signal processing:

    Constant current source 1.5mA power supply, differential bridge output;

    With temperature compensation;

    Application:

    Pressure sensing core of general pressure transmitter;

    Pressure sensing core of liquid level and water level transmitter;

    Pressure measurement in other civil / industrial automation fields;

    Application fields:
    Specification parameter
    1、 Technical parameters
    19 series range
    Gauge pressure g (kPa): 10, 20, 35, 70, 100, 160, 250, 400, 600
    Gauge pressure g (MPA): - 0.1 ~ 0.1, - 0.1 ~ 0, - 0.1 ~ 0.25, - 0.1 ~ 0.6, - 0.1 ~ 1, - 0.1 ~ 1.6, - 0.1 ~ 2.5
    Gauge pressure g (MPA): 1, 1.6, 2.5, 4, 6, 10, 16, 25, 40, 60, 100
    Absolute pressure a (kPa): 35, 100, 250, 600, 1000, 1600, 2500
    Differential pressure d (kPa): 35, 100, 500, 1000, 5000, 10000
    13 series range
    Gauge pressure g (kPa): 35, 75, 100, 160, 250, 400, 600
    Gauge pressure g (MPA): - 0.1-0.1, - 0.1-0, - 0.1-0.25
    Gauge pressure g (MPA): 1, 1.6, 2.5, 4, 6, 10, 16, 25, 40, 60
    Absolute pressure a (kPa): 100, 250, 1000

    ? ? ? ? ? ??


    Measuring medium: liquid and gas (compatible with connecting materials of product process)
    Pressure form: gauge pressure, absolute pressure and differential pressure
    Output signal: 70-100mv
    Power supply: 1.5mA constant current power supply
    Comprehensive accuracy: ± 0.25% FS; ± 0.5% FS; ± 1% FS
    Non linear: ≤ 0.25% FS
    Repeatability: ≤ 0.1% FS
    Zero point output: ± 2mV
    Zero temperature drift: 0.02% FS / ℃
    Sensitivity temperature drift: 0.02% FS / ℃
    Vibration: 20g / (20-5000hz)
    Insulation impedance: ≥ 1000m Ω / 100VDC
    Output impedance: 3K Ω ~ 6K 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
    Seal ring: φ 16 × 1.7mm (NBR or fluorinated rubber)
    Oil filled material: silicone oil, olive oil (sanitary type)
    Protection grade: IP65
    Connecting cable: four core silicone wire, standard length: 50mm
    Connecting material: imported elastomer material
    Process connection: 19 / 13 / 50.8/dn50/dn80/dn100


    2、 Specification and model

    3、 Structural dimensions

    4、 Electrical connection


    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 the pressure core is 1.5mA from the constant current source;

    The core output is differential bridge output;

    Bridge impedance: 3-5k ohm

    The output signal is about 70-100mv

    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 mode 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 current power supply, 1.5mA;

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

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

    During installation, a small amount of vacuum grease shall be evenly applied on the surface of "O" ring;

    Push the core into the cavity evenly along the axial direction of the cavity, and pay attention that the "O" ring cannot be damaged;

    Pay attention to the protection of the lead of the pressure core, and the lead shall not be pulled;

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

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

    The "O" ring seal is a suspension seal, which is an absolutely reliable static seal. No other seal is needed. It can be used in 40MPa pressure environment under normal conditions;

    When the pressure exceeds 25MPa, it needs to be equipped with a retaining ring for combined use, and the sealing pressure can reach 400MPa;

    When assembling a small range core, it is not easy to press hard, so the extra force will make the core temperature special;
    Common problem
    Question 1: no output of pressure core?

    Cause handling method

    Lead open circuit check lead and repair

    Broken bridge cannot be repaired, replace

    Strip the wire again for poor contact


    Question 2: is the pressure core output correct?

    Cause handling method

    The bridge and road wiring is not correct according to the product instructions

    Check and remove the external force on the chip sealing area

    Core or chip damaged, unable to repair, replace


    Question 3: unstable pressure core output information?

    Cause handling method

    Lead wire poor contact check lead wire and repair

    Check and remove the external force on the chip sealing area

    Check and repair the unstable power supply of constant current source

    Constant current source input impedance mismatch replacement

    Constant current source power is not enough to replace

    Elastomer overpressure or large impact replacement

    Inspect and repair the poor insulation

    Proposal
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    Foshan puliang Electronic Co., Ltd

    Tel:0757-26619568 Fax: 0757-26619508

    24-hour online technical support:13790092618

    Cloud platform:www.puliangiot.com

    Address:501, block 8, phase 5, Rongli tianfulai industrial city, Ronggui town, Shunde District, Foshan City

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