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pressure measurement

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Brake shoe pressure software
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PT500-EDS300

Model: PT500-EDS300
Adopt imported pressure sensor chip; 4-digit module to display pressure value;
Key adjustment and field setting of various parameters, easy to operate;
Pressure preset switch point and delay switching output;
The switching value can be set from zero to full;
2-way switch output with load capacity of 1.2A;
With one 4-20mA or rs485-rtu output
Common keywords:
Intelligent pressure switch digital pressure switch digital display pressure switch
Dual output pressure sensor switch value pressure transmitter
Replaceable: eds300 series intelligent pressure switch

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

Chip:
Adopt imported voltage sensing chip; select the chip technology, with zero, full range compensation, temperature compensation;
Diffused silicon core, high sensitivity, large output, zero point, full range compensation, temperature compensation, suitable for small range pressure transmitter;
Strain gauge core, high-strength elastic deformation pressure sensing material, equipped with temperature compensation, has the advantages of impact resistance and fatigue resistance, suitable for general range pressure transmitter;
Signal processing and control output:
4-digit digital display of current pressure value, display range: - 1999 - 9999, key adjustment and field setting of various parameters, easy to operate;
High precision stable amplification IC, 24 bit ADC sampling processing chip, DSP digital signal conditioning algorithm, multi-point line temperature calibration, voltage and current overload protection;
Two channels of PNP or NPN switching value + 4-20mA analog quantity transmission output;
Two channels of PNP or NPN switching value + RS485 digital communication output;
Pressure preset switch point and delay switch output, switch value can be set from zero point to full degree;
The shell is provided with a node action led for easy observation;
2-way switch output with load capacity of 1.2A;
Structure:
Small structure, full seal welding structure, impact resistance, fatigue resistance, high reliability, a variety of process connection;
Process connection material, 304, diversified modes (M20, M16, M12, G1 / 4, G1 / 2, 1 / 2NPT, 1 / 4NPT, etc.);
The shell pressure interface can rotate at 330 ° for the convenience of rotating the direction of the meter head;
Electrical connection: optional 4 / 5-core M12 connector, 4-core hesman connector and 4 / 5-core aviation connector;
4-core / 5-core shielded cable according to output matching standard;
Application:
Pressure measurement and control of pipeline water pressure and hydraulic equipment
Pressure measurement control of hydraulic system pipeline and hydraulic equipment
Complete with PLC and display instrument to realize the collection and input of pressure switch value
Pressure measurement in other civil / industrial automation fields

Application fields:

petrochemical industry
Petroleum Pipeline
Gas supply system
Constant pressure water supply
Water supply equipment
Hydraulic equipment

Product family:

Measuring medium: liquid and gas (compatible with connecting materials of product process)
Pressure form: gauge pressure, absolute pressure
Range: 0 ～ 0.6 ～ 60MPa ～ 150MPa
-0.1～0～0.6～5MPa
-100KPa～10KPa～40MPa
±10KPa～±100KPa
Comprehensive accuracy: ± 0.25% FS; ± 0.5% FS; ± 1% FS
Non linear: ≤ 0.25% FS
Repeatability: ≤ 0.1% FS
Output signal: PNP / NPN switching value
PNP / NPN switching value + 4-20mA analog value
PNP / NPN switching value + rs485-rtu communication
Power supply voltage: 24VDC (9-30vdc) / consumption current < 60mA
Display mode: 4-digit nixie tube
Display range: - 1999 - 9999
Switch load capacity: < 24v1.2a
Switch life: ≥ 1 million times
Insulation impedance: ≥ 1000m Ω / 100VDC
Load impedance: current output: ≤ 800 Ω
Medium temperature: - 20-80 ℃
Ambient temperature: - 20 ～ 70 ℃
Compensation temperature: 0 ～ 70 ℃
Response time: ≤ 5ms
Overload pressure: 150% FS
Failure pressure: 5 times of range (range less than 5MPa); 3 times of range (range greater than 5MPa)
Electrical connection: M12 electrical connector (four core / five core)
Protection grade: IP65
Connecting cable: four core / five core shielded cable, standard length: 3M
Connection material: 304 / 316L
Process connection: M20x1.5, G1/2, G1/4, ZG1/4, 1/4NPT, ZG1/2, G3/8, M12x1.5

五、安裝方式

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:
Power supply range: DC 12-30vdc;
The difference of control circuit between PNP switch type and NPN switch type;
The output capacity of PNP and NPN switching value with load, driving current less than 1.2A;
Whether 4-20mA transmission output is required;

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;

Product power supply 24VDC (range: 9-30vdc);
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;
When the product is installed, 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 protect the outgoing cable of the transmitter. When the span is too large on site, it is recommended to use metal pipe for protection or overhead;
The product is installed in a ventilated, dry and non corrosive environment, and installed in the open with protective devices to avoid direct sunlight;
The line connection shall be as short as possible; shielded wire shall be used; direct access to the user device causing interference or the wiring of electrical and electronic devices shall be avoided as far as possible if the micro hose is used for installation,

The housing must be grounded separately

Error code
Er01 --- the output of switch 1 is short circuited. In case of error, the output is closed and it is not controlled again. Troubleshooting measures: after removing the short circuit, power on again.
Er02 --- the output of switch 2 is short circuited. In case of error, the output will be closed and will not be controlled again. Troubleshooting measures: after removing the short circuit, power on again.
Er12 --- the output of 1 / 2 switch is short circuited at the same time, and the wrong output is closed without control. Troubleshooting measures: after removing the short circuit, power on again.
ErEP---EEPROM data verification error, the possible cause is
Strong electromagnetic interference or failure of a device. Troubleshooting: power on again after power failure, or enter advanced user menu to restore factory settings.
ERAD --- internal analog-to-digital conversion error of the instrument, which may be caused by strong electromagnetic interference or a device failure. Elimination measures: eliminate electromagnetic drying
The interference source and instrument shell shall be properly grounded.

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