The lengthened fork liquid level switch

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ZW-YCK series lengthened fork liquid level switchis composed of piezoelectric and fork resonance pri…

Productoverview:

ZW-YCK series lengthened fork liquid level switchis composed of piezoelectric and fork resonance principle design, through the induction fork frequency and phase change of the front-end signal acquisition, through integrated circuit, single-chip processing switch signal output of the measuring unit. The automatic control valve, pump and the material of high and low of the automatic control system of automatic control places. The product has strong adaptability, good stability, harsh environments can be used normally. After installation without maintenance, simple operation, without adjustment, can provide great convenience for the scene.

Two, work principle:

ZW-YCK series <strong> lengthened fork liquid level switch</strong> principle is through the installation of the fork on the base of the piezoelectric tuning fork in resonant frequency vibration. When the tuning fork and the medium contact, the frequency and amplitude of the tuning fork will change, these changes are detected by the intelligent circuit, and converts it into a signal switch.

Fork liquid level switch by the crystal vibration excitation, when it is liquid or solid immersion when the vibration frequency changes, the frequency change detected by electronic circuit and the output of a switch. Tuning fork switch is also called "float", and because the electrical switch can where the use of floating ball structure, turbulence, agitation, bubble, vibration and other reasons can not use the float switch use electric float". No moving parts, so there is no need of maintenance and adjustment, is a replacement of the float switch upgrade. On the level of the upper and lower limit alarm and control.

Three, application:

ZW-YCK series <strong> lengthened fork liquid level switch</strong> as the level switch without moving parts, so there is no need to maintain and adjust the float switch is the upgrading of products, widely used in water, mineral water, pulp, glue, dyes, mud, alkali solution, acid solution, beer, beverage, food, petrochemical, light industry, water treatment, can produce gas liquid, good fluidity of solid powder or granule. On the level of the upper and lower limit alarm and control.

Fourth, the main features:

1, strong adaptability of measured materials with different electrical parameters, density of measurement are not affected. Scaling, agitation, turbulence, bubble, vibration, medium viscosity, high temperature and high pressure conditions have no effect on detection;

2, avoid the maintenance due to the testing process tuning fork limit switch is completed by electronic circuit, no moving parts, so the installation operation will require no maintenance;

3, do not need to adjust the tuning fork detection limit switch is not affected by the influence of electrical parameters and the measured medium density, so no matter what liquids without measuring field adjustment.

Five, technical parameters:

1, working temperature:

The sensor part: common type: from-20 DEG C, ~ 80 type: high temperature from-20 DEG C ~ 200;

Circuit: from-20 DEG C ~ 70 (industrial products), 30 DEG C 80 (industrial products);

2, relative humidity: 5 ~ 100 (%);

3, atmospheric pressure: 86 ~ 108 (Kpa);

4, the environmental vibration level: V - L - 4 acceleration is less than or equal to 1g;

5, the power supply voltage: 220V AC + 10%50Hz ~ 60Hz ~ 264V AC 85V: intrinsically safe;

6, power consumption: less than 3VA;

7, working pressure: 1MPa;

8, material: 20 degrees, medium angle of repose;

9, medium density material: liquid, solid > 0.7g/cm3 > 0.1g/cm3;

10, particle size: more than 15mm;

11, medium viscosity material (liquid): less than 1000mm2/s.

Sixth, technical characteristics:

1, switch signal delay time: 1 ~ 3 (s);

2, output form

Normally open and normally closed contacts

The relay output: 220V 5A, AC 10A 30V DC 5A, 10A;

The constant current output: 0/10 mA DC (except for intrinsically safe type abroad have this output);

The output voltage: 1/5 V DC (safe the output);

3, high temperature sensor and circuit part Zui: the separation distance is less than or equal to 50m;

4, this type of tuning fork level switch remote distance: 5Km;

5, a light signal display: green light that is not in contact with a tuning fork level sensor in the work, the red light indicates that the fork has been exposed material, the sender sends a signal;

6, the tuning fork level switch shell protection grade: IP65;

7, explosion-proof type explosion-proof switch tuning fork level level: Exib (IB) BT5 ii.

Seven, product debugging:

1, check the power connection:

Terminal board all the power wiring is connected to the top of the electronic unit.

2, the high and low alarm selection:

The high and low alarm can be installed in the field by the high and low in the electronic unit alarm block set tripping.The alarm for high on the right side, the alarm is low on the left side (the factory is set to high level alarm, also can change the output terminal).

High alarm: when the material end submerged sensor Center (or instrument failure), a high level alarm signal.

Low alarm: when the material is lower than the center sensor end (or instrument failure), a low alarm signal.

The relay wiring 3:

A, each instrument with a set of relay contact (SPDT) SPDT relay, only as a switch, can directly drive the alarm or other large power devices. All control signals are at the top of the output terminal of electronic unit. When the green light indicates that the relay (not normal alarm, as shown in Figure 3), when the relay is in the state of alarm lamp (or when fault occurs in the power meter, the relay in the alarm state).

B, open the upper cover of the shell, a connecting terminal, a toggle switch and a light emitting diode LED, sensitivity adjusting button. The sensitivity adjustment knob clockwise, counterclockwise rotation, reduced sensitivity; sensitivity.Usually, the factory has been marked without adjustment for high viscosity liquid medium, generally lower sensitivity.

Eighth, use and maintenance:

1, the feeding hole can not be directly at the fork, if cannot avoid, in order to prevent bulk material compaction to fork, fork must be greater than 20cm above provided protection board, or with protective cover, so as not to damage the fork. If the air material can fortify the wind plate.

2, strong vibration occasions, available rope hoisting fork (have special orders).

3, may not be the instrument settings in direct sunlight, such as sunlight can be provided with a heat insulating plate.

4, shell installation to make cable outlet holes down, and the rubber sealing ring to prevent the infiltration of water droplets in the shell.

5, before use to check instrument work and delay, can be run correctly.

6, the instrument should be inspected regularly, remove sediment on fork.

7, grounding wire to the vessel wall or the earth with good contact, the grounding resistance is less than 2.

8, fork limit switch usually uses side mounted installation and silo wall material on the height of the upper and lower position detection, when the inconvenience of silo of side hole can be used when the top loading, location selection can avoid material impact position.

Nine, installation notes:

1, install the sensor when inserted into the tank, with a wrench at the upper part of the square of six sensor screw can be tightened, not moving case wring their hands, because in the process of tightening will cause the shell and the probe rod rotates between. The connecting cable electronic unit and sensor in the factory inside the casing is connected, screwing the shell will connect the internal tensile cable.

2, pay attention to installation of the fork body do not have a strong impact, so as to avoid damage to the piezoelectric crystal.

3, the instrument sensor should try to avoid the impact of the material, the level of installation, the fork body two parallel fork plate should be perpendicular to the ground (the way fork onto or down direction markers), to ensure that the material can easily flow out from between the forks.

Ten, the selection of encoding:

Eleven, design selection and ordering information:

1, please specify the parameters according to the selection marker;

2, also indicate the medium name, temperature and pressure;

3, to measure the material level, indicating the material name, size and capacity;

4, such as the use of other standard flanges, please indicate the standard no.;

5, please indicate whether a protective cover or protection plate flange.