Liquid level display apparatus

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Liquid level meter suitable for various kinds of 0.5-6 t/h, pressure 2.5 Mpa or less control of boil…

Liquid level meter suitable for various kinds of 0.5-6 t/h, pressure 2.5 Mpa or less control of boiler drum water level indicator and level type, can according to the level of automatic or manual control of the pump to water level control.Water pump and off position, the user can set according to their actual needs, at the same time SZD - A liquid level control instrument with high, low, low and dangerous acousto-optic alarm and alarm contact output.This instrument series adopts double color column display, beautiful, generous, just 160 mm thickness meter, adapted to the electric boiler, steam boiler and coal boiler and boiler drum water level control, also can be used in all kinds of wall control box.

A liquid level apparatus main features:

1, strong anti-interference ability, simple installation, no need to debug, intelligent man-machine dialogue setting on its own.

2, this apparatus can be according to the requirements of the user free to set the automatic open and stop pump, pump switch the location of the user can be set within the plus or minus 50.

3, the apparatus of the LED display tube increased to 40, the change of liquid level is more clear, the accuracy is 2.5 mm/a.

4, increased the three digital tube, make observation water level more accurately, display precision reached 1 mm, changed the past only by observing the LED display to estimate water level.

5, for boiler water level sampling algorithm adopts the advanced fuzzy intelligent curve, shielding the boiler water surface fluctuation influence on sampling, display and control more smoothly, to ensure the safe operation of the boiler.

2. Liquid level apparatus main functions:

1, high and low water level acousto-optic alarm function.

2, high and low water level alarm switch function, of output.

3, low risk level interlock protection function.

4, with functions of boiler water level double color column display.

5, with functions of boiler water level digital display.

6, boiler water level control manual, automatic control function of arbitrary switching without disturbances.

7, with functions of alarm sound auto reply.

8, with an emergency, manual hydrating function.

9, adaptation sensors: inductive sensors.

3. Liquid level by adjusting the parameters of the instrument technology

1, instrument working temperature: 0 ~ 50 ℃

2, switch pump adjusting range: - 30 mm ~ + 30 mm (adjustable)

3, instrument input signal: inductive signal, 0 ~ 10 ma, 4 ~ 20 ma

4, the display range: - 50 ~ + 50 mm or 0 ~ 100 mm (adjustable)

5, meter output signal: 0 ~ 10 ma, 4 ~ 20 ma (internal jumper wire)

6, contact switch pump capacity: 5 a, AC220V

7, p contact output: 10. A, AC220V

8, working voltage: ~ 220 v + 15% for 50 hz

9, instrument power consumption: 10 or less va

10, instrument size: 160 mm * 80 mm * 160 mm

11, dashboard hole size: 76 mm + / - 1 mm x 152 mm + / - 1 mm

4. The working principle of the liquid level regulator

By the detection level of the inductive level sensor to detect the liquid level changes of the signals sent to the apparatus to detection input module, amplifier, fuzzy operators, through the single-chip microcomputer software output stable water level signal, step by step to control LED display module, display of real water level signal, control the liquid level control module to realize the automatic boiler water level control, ensure the security of the boiler water level control in the scope.At the same time realize the boiler water level column display and digital display with multiple functions.

When some reason boiler water level is abnormal, namely the high water level and low water level and low water level, the safety control modules, the system automatically send out sound and light alarm signal, signal relay contact output switch.(high, low, low risk alarm switch signal relay contact factory for normally open signal).

5. Liquid level apparatus installation and wiring

Adjust the instrument installation connection as shown in figure (1) (please according to the actual meter terminal connection)

1, between sensor and boiler equipped with DN25 valve two, in order to facilitate debugging maintenance.During normal operation, the valve must be opened entirely, sensors connected to the other end of the glass water level gauge.

2, sensor installation must be perpendicular with the parallel to the boiler liquid level, slope shall not be greater than 2 DHS.

Note: sensor normally does not need to install the drain pipe, drainage, through the water level gauge pollution.

3, secondary instrument should be installed far away from heat source, easy to monitor the working condition of the place, is easy to operate and requirements for electrical maintenance.

4, connection terminals on the instrument in all have clear marks, user according to the wiring.

6. Liquid level control device debugging and use

1, the preparation work: (must read the instructions carefully before debugging)

2, check the instrument wiring is correct.

3, first of all, according to the scale on the boiler water level gauge, determine a middle water level, higher than the middle 50 mm identified as high water level stations, the water below the middle water level 50 mm identified as low water level stations, 75 mm below the middle water level identified as dangerous low water level stations.Confirm and marked.

Note: please set-up in instrument electricity for half an hour, before calibration instrument in manual mode.

Start calibration (please refer to the following steps)

The first step High alarm point calibration (note that in manual mode:

Man-made water level will rise to high water level alarm point, namely the + 50 mm, at the same time, according to the panel to set and button for more than 5 seconds, let out a loud sirens, the system automatically recognized and automatically save this point as high stations.

The second step Low alarm point calibration (note that in manual mode:

Human has reduced the water level is very low water level alarm point, namely the - 50 mm, at the same time, according to the panel to set and button for more than 5 seconds, let out a loud sirens, the system automatically recognized and automatically save this point as low stations.

After the above steps, switch to the automatic state can run automatically.

Note a simulation and practical observation water level again, each point water level display correct rear can put into use.

Note 2, automatic control of pump start and stop position, the system default for plus or minus 30 mm, dangerous low emergency alarm by default - 75, to adjust the user is not recommended.Special cases need to adjust, please switch pump position and dangerous low alarm point according to the following steps (before delivery has good debugging, it is not recommended)

Note that in manual mode:

Restore the factory Settings

Note that in manual mode:

According to the principle of sound attenuation and 5 seconds, let out a loud sirens, after system confirm to recognize and restore factory Settings, restore the factory Settings, instrument need to debug.Make the instrument and the corresponding water, can be put into operation.