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Product description of strain type pressure transmitter:

Model: PT500-802
The minimum differential pressure is 100Pa;
3-5 times withstand voltage, suitable for dry gas differential pressure measurement;
High precision, stable, digital calibration adjustment, amplification integrated circuit;
Zero point, fullness, temperature compensation and linear compensation;
Aluminum alloy oxidation shell; 8mm + m10quick plug process connection;
Common keywords:
Micro differential pressure transmitter micro differential pressure sensor
Micro differential pressure transmitter

Chip:
The minimum differential pressure is 100Pa;
3-5 times withstand voltage, suitable for dry gas differential pressure measurement;
Zero point, fullness, temperature compensation and linear compensation;
High impedance, high precision and high stability;
More than 1 million times of service life;

Signal processing and output:
24 bit ADC sampling and processing chip;
DSP digital signal conditioning algorithm;
Multipoint linear temperature calibration;
Voltage and current overload protection;
Standard industrial signal output: 4-20mA (two-wire system), 0-20mA (three wire system), 0-5vdc, 0-10vdc, 0.5-4.5vdc (three wire system);

Digital communication signal output: rs485-rtu, ultra-low power rs485-rtu
Advanced 32 bit microprocessor and 24 bit ADC are adopted
The transmission protocol is MODBUS-RTU
Support baud rate: 1200 ~ 57600bps, check bits: none, odd, even
Support the user's secondary calibration, reset, anti reset, restore factory operations
Support 11 kinds of units switching, support floating point, integer, percentage, formatted output
The acquisition interval of 0 ~ 43200 seconds (12 hours) can be set, which can not only meet the needs of high-speed acquisition, but also trigger acquisition once to

minimize power consumption

Digital communication signal output: CAN2.0B
Measurement rate: 10... 1000Hz can be set, the default is 50 Hz

CANopen output built-in complete CANopen protocol stack, in line with ds301, ds404 specifications, support LSS services, support bootloader online upgrade;
Support baud rate (kbps) 20 / 50 / 100 / 125 / 250 (default) / 500 / 800 / 1000; support features of NMT / heartbeat / SDO / PDO / LSS / bootloader; CANopen protocol

stack can be customized according to user requirements;

J1939 output has built-in J1939 protocol stack. PGN, SPN and name can be configured freely, and bootloader online upgrade is supported;
Support baud rate (kbps) 20 / 50 / 100 / 125 / 250 (default) / 500 / 800 / 1000; support free configuration of features such as PGN, SPN and name
The J1939 protocol stack can be customized according to the user's requirements;

Structure:
Aluminum alloy oxidation shell; 8mm + m10quick plug process connection;
Small structure, tight wire nut waterproof, electrical connection;
Supporting four / five core shielded cable;

Application:
Pressure measurement and monitoring of negative pressure, dust-free workshop, Department, etc;
Pressure measurement and monitoring of buildings, ventilation, etc;
Pressure measurement and monitoring of dust collection pipeline, waste gas treatment, etc;

Application fields:

Smart city
Fire fighting system
Natural gas pipeline
Air supply system

Product family:

Specification parameter

Measuring medium: dry gas
Pressure form: differential pressure
Range:
0～100、200、300、500、1000（Pa）；
0～1、2、3、5、10、20、30、40、50、70、100（KPa）；
-100KPa～-10KPa～0～100（KPa）；
±500Pa～±100KPa；
Static pressure (withstand voltage): 3 ~ 5 times of measuring range
Comprehensive accuracy: ± 0.25% FS; ± 0.5% FS; ± 1% FS
Nonlinearity: ≤ 0.5% FS
Repeatability: ≤ 0.25% FS
Output signal:
Current type: 4-20mA two-wire system; 4-20mA / 0-20mA three-wire system
Voltage type: 0 ~ 5VDC, 0 ~ 10VDC, 0.5 ~ 4.5vdc three wire system
Digital type: rs485-rtu, low power rs485-rtu
CAN2.0B (supports CANopen, J1939 Protocol)
Supply voltage:
24VDC(9～30VDC)
5VDC (0.5 ～ 4.5vdc output type)
3.1 ~ 6.1vdc (low power rs485-rtu)
Service life: ≥ 1 million times
Insulation impedance: ≥ 1000 m Ω / 100VDC
Load impedance: current output: ≤ 800 Ω; voltage output: ≥ 50K Ω
Medium temperature: - 20 ～ 70 ℃/
Ambient temperature: - 20 ～ 70 ℃
Compensation temperature: 0 ～ 60 ℃
Response time: ≤ 3MS
Overload pressure: 150% FS
Failure pressure: 3 times of measuring range (less than 40MPa); 2 times of measuring range (measuring range greater than 41mpa)
Electrical connection: Waterproof tight wire nut directly leads out, can be matched with explosion-proof electrical connection
Protection grade: IP65 / IP68
Connecting cable: tightening nut, standard length: 3M
Connection material: aluminum alloy
Process connection: φ 8 quick plug + M10 thread (Universal) Specification can be made by users

Ordering considerations

Precautions for ordering PT500-802 products
1. Product range selection:
In order to achieve the best effect of product precision, life, stability and other functions, the range selection of the product is calculated according 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 measuring range;
The static pressure (withstand voltage) is 3 to 5 times of the range value, that is, the maximum pressure value at the high pressure end;

2. Product power supply and output:
The selection of power supply range is determined according to the output specifications of the product:
Conventional 4-20mA / 0-20mA, 0-5V / 10V output, DC 12-30vdc power supply;
General rs485-rtu output, DC 12-30vdc power supply;
0.5-4.5vdc output, DC 5VDC;

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

It is strictly prohibited that the power supply scope of the product exceeds the specified standard of the product;
The measuring medium of the product is: dry gas. It is forbidden to measure liquid, steam or gas medium with high humidity;
It is forbidden to use hard objects (such as: screwdrivers, fingers, nails, etc.) to make the pressure diaphragm output by pressure measurement;
The power supply and signal line should be connected correctly according to the product specification;
When the product is installed, the pressure pipe is made of 8mm hard gas pipe to prevent the expansion of the gas pipe under gas pressure;
It is strictly prohibited that the medium temperature, pressure range and excitation voltage of the measured system exceed the rated range of the transmitter;
Pay attention to protect the outgoing cable of transmitter. When the span is too large, it is recommended to use metal tube for protection or overhead;
Pressure transmitter is a kind of precision measuring instrument. Do not force impact and fall to avoid damaging the core body
The product is installed in a ventilated, dry and non corrosive environment. It is installed in the open air with protective devices to avoid direct sunlight;
Do not let water / water leak / soak into the instrument. Install protective devices in the open air to avoid direct sunlight;

Common problem

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