Explosion proof type fork liquid level switch

Productoverview:

ZW-YCK series Explosion proof type fork liquid level switch It is a universal type switch. Explosion-proof tuning fork piezoelectric tuning fork switch by excitation vibration, 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. The explosion-proof switch fork is not affected by the dielectric parameters and turbulence, agitation, bubble, vibration and other factors, no moving parts, so there is no need of maintenance and adjustment, is a complex condition level switch is ideal.

Two, work principle:

ZW-YCK series explosion-proof switch fork liquid level measurement 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.

ZW-YCK series explosion-proof type fork liquid level switch by crystal excitation vibration, 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 "electric float", and because of where the use of the float switch can 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 explosion-proof type fork liquid level switch is suitable for almost all of the liquid medium, such as explosive and non explosive liquid, corrosive liquid (acid and alkali) of high viscosity liquid; it is not affected by the bubble, eddy current, gas effect. At the same time for medium density to measure the free flowing solid powder or granule.

Fourth, the main features:

1, strong adaptability, the measured material of different electrical parameters and density on measurement were not affected;

2, maintenance free, because the detection of explosion-proof tuning fork switch is completed by electronic circuit, no moving parts, so the installation operation will require no maintenance;

3, do not need to adjust, because the tuning fork switch without detection explosion-proof electricity parameters and the measured medium density, so no matter what liquids without measuring field adjustment;

4, the product of scaling, agitation, turbulence, bubble, vibration, medium viscosity, high temperature and high pressure conditions have no impact detection.

Five, technical parameters:

1, power supply voltage: DC 24V or AC 220V;

Working temperature: 2, fork -40 to 150 DEG -30 to 70 DEG C, instrument;

3, working pressure: less than 2MPa;

4, medium density: minimum 0.7g/cm3;

5, output: relay output (AC220V/3A, DC, 30V/3A);

6, the output delay: 1~20 seconds adjustable;

7, explosion proof mark: D II BT4;

8, power: 1W;

9, the installation of connector: R1;

10, electrical interface: M20 * 1.5.

Sixth, installation instructions:

Usually the side mounted (mounted on the side wall) installation and silo wall of material level detection on the lower limit position of the silo body; when the inconvenience of side hole can be used when the top loading (installed in the warehouse at the top) installed position should be selected to avoid the impact of the position of material feeding; no material can be installed and run on pump to prevent pipeline.

Seventh, product testing:

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.

Eight, matters needing attention:

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.

Nine, the selection of encoding:

Ten, design selection and ordering information:

1, the level control device specifications;

2, measuring range;

3, working pressure and temperature;

4, material control device;

5, special request;

6, the liquid level device is supporting the supply vessel flange, bolts, nuts, washers and valve sealing parts, so that the correct selection.

Customer service service commitment:

1, our level switch series products quality problems within twelve months, responsible for free maintenance.

2, the warranty period if the products of our company have any quality problems, our company is responsible for free repair or replacement.

3, the warranty period if the user use undeserved, cause damage to the product, our company is responsible for the maintenance, collect the damaged parts cost.

4, after the warranty period of product quality problems, our company is responsible for the maintenance, collect the damaged parts cost.

5, if the user needs to our service, our company in the province of the user service personnel arrived at the scene within 12 hours, arrived at the scene 48 hours outside users.