Intelligent electric contact liquid level gauge

Products overview:

ZW - UDZ seriesMainly by the measuring cylinder, electric contact and secondary instrument, it is using the boiler steam drum water and steam can vary enormously, the principle of the conductive permeance converts the change of water level through the electric contact resistance value changes, and transferred to secondary instrument measurement, display and control.Design adopted multiple electric contact detection method that is measured in barrel has several electric contact, displayed a points, several secondary instrument of most can be up to 19 points, special models can be up to 38 points (with 160 x160x300 chassis).

UDZ series liquid level gauge of form a complete set of electric contact is made of super high purity ceramic electrodes, its pressure, heat resistance, insulation performance is good, and USES the way of communication power supply, so as to effectively prolong the service life of electric contact, avoid the user the trouble of frequent replacement of electric contact.

Second, the working principle:

ZW - UDZ series intelligent electric contact water level gauge due to the conductivity of water and steam are very different.To measure the effect of drum water level is to change by the change of the electric contact resistance to obtain the signal.Electric contact insulator can make electric contact and the measuring cylinder shell insulation, when liquid, due to the low water resistance, the electric contact and the measuring cylinder shell through.When add a voltage between the electric contact, the flow of electric current is big, can make the secondary instrument in the integration of the op-amp, is on the front panel color light-emitting tube will show "green" color;On the other hand, not immersed in liquid surface of electric contact in the vapor state, because of the steam resistance value is bigger, can be relatively as open circuit, the flow of electric current is small, the secondary instrument of integrated op-amp not flip, on the front panel display "red" color luminous tube.Therefore, the water level of high and low depends on electric contact immersed in quantity, namely how much depends on the "green" color luminous tube.

Applications:

ZW - UDZ series intelligent electric contact water level gauge is mainly used in monitoring the boiler steam drum water level, the high pressure heater and low pressure heater and deaerator, evaporator, condenser, once-through boiler startup separator and the double water cooled generator within the tank water level measurement and other conductive liquid level measurement, but shall not apply to the flammable and explosive medium.

Three, the main features:

1, use full stainless steel, the product gauge display, alarm switch, far transmission: 4-20 ma and containers within the medium separated from each other, no leakage, no wear and tear.Applies to one, two, three types of containers for flammable, toxic corrosive medium container is absolutely safe and reliable.

2, the product has observed wide vision, visual, clear.Can be red and green light, suitable for application in light and dark places.Night watch more apparent, can be applied to the television monitor used at the same time, the effect is very ideal.

3, the product widely applicable: used for low temperature, medium temperature, high temperature occasion.

4, 4-20 ma, this product can output load negative force: more than 250 Ω, transmit PC, PLC automatic control and regulation.At the same time can also be allocated to the alarm switch, the realization of chain protection.

Four, the technical parameters:

Instrument named methods: product type - measuring cylinder - - - - points - - use - stress - according to the loading way -- - secondary instrument -- - water resistance;

Measuring cylinder: 01 s - work pressure 4.41 Mpa or less work temperature: 250 ℃ or less;

02 s - work pressure 15.68 Mpa or less work temperature: 350 ℃ or less;

3 s - work pressure 20.6 Mpa or less work temperature: 400 ℃ or less;

Cylinder specification: DXSXL: 01 s 89 x10xl s phi phi 83 x5xl, 02, 03 s phi 108 x18xl;

Communicating pipe specifications: 01 s 25 x3, 02 s phi phi 28 x4, 03 phi 32 x 5 s;

Electric contact by screw hole for M16X1. 5 special orders same side distance between two point must be 60 mm or higher.

Six, measuring cylinder and electrode:

1, measuring cylinder manufacturing standards according to the national machinery industry standard JB/T6691-93 boiler electricity contact liquidometer technology conditions for manufacturing, production, inspection.

2, electrode (electric contact) is made of super pure ceramic manufacturing.Structure is divided into two kinds: pressure into the type and screw type.

Seven, installation instructions:

1, the hydraulic pressure meter flange and container seal on the flange clamp connection is good, screw down the bolt.

2, drain flange opening, in the float sensor;Note: the float magnet steel end up, not the horse.

3, under the sensor drain flange, install a DN15 valve, with the original liquid level meter and drain pipe connected.

4, connect the power and input power AC36V insert AC220V power (or diameter), will the level to facilitate observation location.

5, open the valve on the first, and then slowly open the valve, especially on the occasion of high pressure, injection pressure, and slowly make the medium slowly into the sensor, in case of float suddenly compression damage observation, according to the liquid level change from red to green one.

6, sewage, water, observe whether water showed that high and low, alarm is normal, without abnormal phenomenon, can be put into use.

Eight, measuring cylinder and electrode installation and maintenance:

1, the measuring tube must be installed vertically.

2, measuring cylinder and measured container with soda water pipe connected to middle installation meet the container valve pressure, temperature, in order to replace the electrodes.

Must be in 3, electrodes coated with a little oil of graphite in thread, sealed flat place mat copper gaskets, gently squeezing until no leakage, factory electrode has been installed, and the water pressure test.

4, run, measuring cylinder should be regular blowdown, cleaning, prevent electrode fouling, so as to prolong service life, ensure accurate and reliable measurement.

Electrode connected to the secondary instrument, wire and tube wall should keep a certain distance.

Nine, selection of code:

Ten, selection of details:

11 order, design guidelines:

1, please users read the instructions before you order, or product introduction.

2, provide the measuring point distribution (table 2) that is outside the scope.

3, indicate the alarm, and protect the output position (set).

4, clear an instrument (sampling tube) working pressure, and communicating pipe size of center distance, which leads to the flange specifications.

5, this instrument can take 4 ~ 20 ma, 1 ~ 5 v, 0 ~ 10 ma dc signal output, the user need when ordering, please indicate.

After-sales service commitment:

Level 1, I companies sell products within twelve months appear quality problem, is responsible for free maintenance.

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

3, the warranty period, such as user improper use, damaged products, my company is responsible for the maintenance, charge damage parts cost.

4, after the warranty period appear quality problem, my company is responsible for the maintenance, charge damage parts cost.

5, such as user need to my company site services, to users in the province I company service personnel to reach the site within 12 hours, fujian association of foreign languages and user reach the site within 48 hours.