Foshan puliang Electronic Co., Ltd

Product description of strain type pressure transmitter:

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, five engineering unit options: psi, bar, kPa, kg / C ㎡ MPa;
High precision stable amplification IC, 24 bit ADC sampling processing chip, DSP digital signal conditioning algorithm, multi-point line temperature calibration;
Large screen LCD display, high resolution, ignoring value error;
Peak holding function, recording the maximum pressure value during measurement;
Pressure percentage dynamic display, (progress bar display), sampling rate up to 4 times / second;;
Select the automatic shutdown function of 1-15min; micro power consumption, working in the power saving mode for more than 2 years, continuous working for 2000 hours;
Parameter correction function, which can correct zero point and error value of instrument on site;

Structure:
Small structure, full seal welding structure, impact resistance, fatigue resistance, high reliability, a variety of process connection;
Simple operation, easy debugging, safe and reliable;
High degree of protection, suitable for installation under various working conditions;
Process connection material, 304, diversified modes (M20, M16, M12, G1 / 4, G1 / 2, 1 / 2NPT, 1 / 4NPT, etc.);

Application:
Hydropower, tap water, petroleum, chemical, mechanical, hydraulic and other industries
Replace mechanical pointer pressure gauge;
Pressure measurement in other civil / industrial automation fields

Application fields:

Oil pressure system
Natural gas pipeline
Air supply system
Gas supply system

Product family:

Specification parameter

Measuring medium: liquid and gas (compatible with connecting materials of product process)
Pressure form: gauge pressure, absolute pressure
Range: 0 ～ 0.6 ～ 60MPa ～ 100MPa
-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
Power supply voltage: 9V battery (charging / disposable)
Display mode: 4-digit nixie tube
Display range: - 1999 - 9999
Display unit: psi, bar, kPa, kg / C ㎡, MPA optional
Automatic shutdown: 1-15min optional
Switch life: ≥ 1 million times
Insulation impedance: ≥ 1000m Ω / 100VDC
Medium temperature: - 20-80 ℃
Ambient temperature: - 20 ～ 70 ℃
Compensation temperature: 0 ～ 70 ℃
Response time: ≤ 5ms
Acquisition frequency: 4 times / second
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

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:
Power supply range: 9VDC battery;
Battery Specification: 9V disposable and rechargeable battery for common multimeter;

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

Product power supply 9VDC battery;
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;
When installing the battery, connect the wires correctly;
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;
The product is installed in a ventilated, dry and non corrosive environment, and installed in the open with protective devices to avoid direct sunlight;
Try to avoid direct access to user devices or electrical and electronic devices that cause interference;

Common problem

Question 1: no LCD display?
Reason----handling method
No battery----replace battery
Wrong Battery Specification----replace 9V battery
LCD screen damaged----return to the factory for repair and replace the display screen
Burn out of integrated amplifier board----return to factory for repair and replace the amplifier board

Question 2: LCD display characters incomplete or missing?
Reason----handling method
Battery dead or low----replace battery
Poor contact of internal circuit----return to factory for repair
LCD screen is damaged----replace the display screen

Question 3: does the displayed value deviate from the actual pressure value?
Reason----handling method
The pressure tap hole of the pressure gauge is blocked----clean the pressure tap hole of the pressure gauge
The connecting pipe of pressure gauge is blocked----clean the connecting pipe
Products with high pressure impact----return to factory for repair
Pressure core damaged----return to factory for repair
Damage of integrated amplifier board----return to the factory for repair and replace the amplifier board

Question 4: is the displayed value unstable?
Reason----handling method
Unstable pressure source----check whether the pressure of the pressurization system is stable
No grounding wire----pressure gauge and equipment are grounded
There is a large magnetic field in the installation position of the pressure gauge----install a shield or replace the installation position
Stone sand or sundries in pressurized pipeline----cleaning
Pressure medium temperature is too high----check whether the medium temperature is within the allowable range of the transmitter

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