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Product description of strain type pressure transmitter:

Product main parts

1. Imported precision pressure core;

2. Zero, full, temperature compensation, digital integrated amplifier board;

3. Four core waterproof electrical connector;

4. Fast liquid and gas interface;

5. Aviation grade aluminum alloy oxidation shell;

6. Exhaust valve;

Accessories:

7. Fixed arrangement plate;

8. Reference liquid filling;

9. Quantity collection electric box;

10. Bus cable;

11. Liquid and gas pipelines;

12. Acquisition and monitoring system;

Product features:

Imported precision pressure core;

Zero, full, temperature compensation, digital integrated amplifier board;

Waterproof and lightning protection structure design;

Digital signal rs485-rtu output;

Resolution high voltage 0.01mm ;

Aviation grade aluminum alloy oxidation shell;

Main applications:

Subgrade settlement monitoring of rail transit;

Subway support wall settlement monitoring;

Mountains and buildings above the tunnel;

Settlement detection of subgrade and slope of expressway;

Settlement detection of pier and foundation pit;

Nuclear power station, large-scale hydropower station;

Foundation of dam, water conservancy project and high-rise building;

Application fields:

Product family:

Specification parameter

1、 Specification and model:

2、 Technical parameters:

Measuring medium: liquid
Pressure form: differential pressure
Pressure range: 0-200mmh20, 0-1000mmh20, 0-20mh20 (customized)
Temperature range: - 40 ~ 100 ℃
Comprehensive accuracy: zero point zero five ~ 0.1%FS
Resolution: 0.01mm
Output signal: rs485-rtu; 4 ～ 20mA
Power supply voltage: 12V DC (7-30vdc)
Insulation impedance: ≥ 1000m Ω / 100VDC
Compensation temperature: - 10-60 ℃ (specified when ordering in special temperature zone, and it can be customized to compensate the ultra-low temperature of - 30 ℃)
Medium temperature: - 40-85 ℃
Ambient temperature: - 40-80 ℃
Storage temperature: - 40-85 ℃; relative humidity: 0-95% RH
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: IP67, IP68
Connecting cable: four core waterproof aviation connector
Connection material: aviation aluminum alloy, oxidation
Process connection liquid pipe: Ф 8mmpu pipe / air pipe: Ф 8mmpu pipe / customizable

3、 Structural dimensions:

4、 Installation mode of electrical connection:

5、 Acquisition system:

6、 Calibration software:

7、 Installation of multi-point monitoring system:

Ordering considerations

computing method

1) The change of liquid level at reference point of static level △ HJ (mm) can be calculated according to the following formula:

△Hj=Kj(Fj-Foj)

Here: kJ sensor coefficient of reference point of static level (M0 / F):

FJ - real time measurement value of datum point of static level (f);

FoJ - initial reading of the reference point of the static level (f).

2) The change of liquid level at the observation point of static level △ HX (mm) can be calculated according to the following formula:

△Hx=Kx (Fox- -Fx)

Here: sensor coefficient of KX static level observation point (mm / F):

Initial reading of fox static level observation point (f);

FX - the real-time measured value of the observation point of the static level (f).

3) The variation of settlement or rise of each observation point △ H (mm) can be calculated according to the following formula:

△lH=△Hx+△Hj

=Kx(Fox- -Fx) +Kj(Fj- -Foj)

Note: when △ h is negative, it means settlement; when △ h is positive, it means rise.

Precautions for use

Installation steps of monitoring point

1) . drilling of installation position

About at the position where the fixed line is needed (under the water pipe) 1.5m One hole of ~ 2m. The ballast bed needs to be drilled at the position of measuring point, the position of structural settlement measuring point, the position of static level support, and the position of data acquisition box.

General drilling standards: 12mm for the tunnel wall, 12mm for the track bed, 18mm for the structural settlement measuring point, and the position of the fixed support shall be drilled according to the size of the collision bolt.

2) . bracket installation

Each static level gauge of our company is equipped with an installation plate, which has the function of side installation and horizontal installation. According to the site requirements, users first fix the plate on the pt500-szy-01 level gauge with bolts, and then drill holes at the measuring points.

3) . wire layout and installation, water pipe connection

According to the distance between measuring points, the wire layout and installation shall be cut into corresponding distance which is more than two meters in case of insufficient length. First, connect the measuring points of pt500-szy-0 static level at the reference point, and then connect each measuring point in series to disconnect the tee and sensor data line at the measuring point

Water pipe connection: the water pipe connection is similar to the wire connection, one difference is that the connection is disconnected at the turning point.

When the water pipe is installed on the tank, if it is not easy to install, it needs to be connected 10 seconds later when the water is boiled on the street. When cutting the water pipe, it is necessary to cut the interface flush or it will leak water.

4) . water tank filling and leveling

The water tank shall be filled with its own water pump and bucket, and a pipe shall be set aside to connect to the water pump for water filling in sequence. The filling pressure shall not be too large to prevent air bubbles from entering. Water shall be kept in the bucket to prevent the water pump from sucking in air.

5) Data collection box is installed in the connecting channel and fixed on the wall with expansion bolts.

Common problem

Proposal

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