Inductive liquid level transmitter

Products overview:

ZW - DBS601/602 series inductance type liquid level transmitter and introduce the foreign similar products technology research of radio frequency induction type liquid level meter.Its compact structure, small volume, simple installation and maintenance, unified overall dimensions.A variety of signal output form for different system configurations.Ptfe, proved extremely strong corrosive liquid such as acid, alkali and high temperature.Immersed in liquid measurement part, only a four fluorine soft wire or rod type four fluorine agent as sensing, high reliability.Fully sealed aluminum cover and stainless steel connection., output at both ends and measurement, output, three power supply circuit structure isolator ways, bring their own isolator, adapted to different signal grounding method.Perfect over-current, over-voltage, power supply polarity protection.
Second, the working principle:
ZW - DBS601/602 seriesInductive principle of measurement of the liquid level transmitter for the electric field induction and to immersion agent changes the height of the measured medium, reflect the variation of induction frequency, the circuit transformation and the matching of 4 ~ 20 ma current signal output.Namely the calibration signal value generated by the CPC and operation on the signal value of measured medium and the difference is converted into a practical level.When the transmitter for people to a certain position in the liquid, feel the pressure sensor for: P = 9.80665 rho H
One P liquid pressure effect on the sensor, the unit kPa
Rho a liquid density, g/cm3
H a liquid level height under test, the unit m
So material 0 H.10197 p/p
To feel the pressure signal into electrical signal in the transmitter, the signal is proportional to the height of liquid.
Three, the main features:
There were 1, simple structure, moving or elastic element, so stay on sex is extremely high, little maintenance.
2, easy installation, built in especially shows the characteristics of the structure, without any special tools.
3, easy to adjust, zero and span two potentiometer can be zero within the scope of the liquid level detection effectively any migration or range change, two adjustment each other.
4, wide range of USES: applicable to high temperature and high pressure, strong corrosive medium level measurement.
Four, the technical parameters:
1, the effective detection range: 0-0.2-20 m;
2, fine degree: 0.5, 1, 1.5 on the Richter scale;
3, pressure range: 32 mpa under negative pressure, normal pressure and high pressure;
4, work temperature: - 50 ~ 240 ℃;
5, environmental temperature: - 20 ~ 75 ℃;
6, suitable medium: acid, alkali, salt, or any of ptfe non-corrosive medium;
7, the output signal: 4-20 ma, two wire;
8, power supply, load resistance 0-750 Ω DC24V;
9, fixed way: thread M20 x 1.5, M27 x 2 flange installation DN15 and DN25, (ａnd DN80;
10, the scene show: analog display 0-99%, digital display, depth of field.

Five, the measuring system:
Measurement system for this type.
This safety type pressure, differential pressure transmitter adopts the intrinsically safe circuit, suitable for explosion-proof grade ExiallCT4 - CT6 explosion danger area.
Shielding signal cable must be used in the system circuit, and reliable grounding.Below are just 4-20 ma output signal and the measurement system of 0 to 10 ma, for example the wiring diagram,
Liquid level transmitter has reliable operation, stable performance, small volume, light weight, low cost, refined design, a variety of structural form, easy installation, without stents.Circuit board USES the microprocessor based electronic technology, can automatically eliminate the influence of temperature change on the sensor precision.
This series of products can be equipped with LCD liquid crystal display (LCD), to facilitate the local operation.
Intelligent output with HART communication function at the same time.
Six, installation and commissioning:
Cable type and lever type liquid level transmitter has many installation fixed way, so as to adapt to different site conditions.When the site will not be able to provide M20 x 1.5 in the process facilities such as thread or the flange, can choose wall installation type, horizontal pipe frame and vertical posture, such as three optional installation way, make you comfortable when installation.
When measuring liquidity larger medium, to prevent violent oscillation sensor, the user can choose counterweight attachment, to have the effect of stable sensors, add weight must to put weight objects in the bottom of the container, in order to avoid pull bad sensing wires.
In the field environment is bad, the user should choose sensor shield to protect sensor, to avoid the foreign body damage or affect the accuracy of measurement.
Using 602 type bar type liquid level transmitter, if not metal containers, you need to put the transmitter of the shell with a wire access the bottom of the container, otherwise not accurate measurement.
This product in the factory has a calibration, if need on-site adjustment can adopt the following methods:
A: using intelligent circuit debugging methods:
Site zero -- -- -- -- -- - when liquid level position in zui low, at the same time hold down the "Z" and "S" keys 8 seconds after release at the same time, then "Z" key press, output current automatically adjusts to 4 ma.
Field adjustable full -- -- -- -- -- - when the liquid level at zui highs, at the same time hold down the "Z" and "S" keys for 8 seconds after release at the same time, then the "S" key press, automatic adjustment to 20 ma output current.
B: adopting the method of analog circuit debugging:
When the liquid level in the next period, "Z" rotating potentiometer gently with screwdriver, observe the ammeter reading close to 4 ma.
When the liquid level in the limited time, use a screwdriver slowly rotating "S" potentiometer, observe 20 ma current meter reading is close.
So above 2 to 3 times repeatedly, until zero and range are accurate 20 ma ma and 4, respectively.
After adjust, should tighten the lid of the transmitter.

Seven, installation and the matters needing attention:
Appearance and installation:
Liquid level transmitter consists of shell, amplifier, terminal blocks, helmets, hollow wire, etc, according to the needs of the user can choose a pointer table, LCD display meter.
Installation method:
(1) place for installation of choice is easy to operation and maintenance;
2 should be installed as far as possible away from the vibration source;
(3) should be far away from heat source as far as possible;
(4) input type liquid level transmitter installation, metal probe to sink to the bottom of the container.

Eight, note:
1, the supply of products with product certificate and instruction manual with the product serial number, technical parameters, wiring diagram, production date, etc. Please check carefully to avoid using wrong.
2, when installation should be according to the product connection and screw type, check the site interface is consistent with the product interface.For screw thread interface, should slow tightened, pay attention to the sealing, can't add the torque directly to the transmitter shell, can only add on the six-party transducer interface.
3, connection should be in strict accordance with the company I use for connection.
4, this product is a precision in instrument, banned free disassembly, collision, drop, play hard.
5, the transmitter power can work, but warm up 30 minutes output stability.
6, if discovery is unusual, in use should turn off the power and stop using, check, or directly to our technical department.
7 should be restored the original packaging, transportation, storage, stored in a cool, dry and ventilated warehouse.
8, installation and use process should pay attention to not put the induction of the skin of the wire broken.
9, when installation induction leads to at least more than 10 cm away from the pool wall, otherwise not accurate measurement.
10, all four fluorine structure and lever type level ground wire must be measured medium conduction, and measurements are not accurate.
11, installation site should take effective lightning protection measures.
12, the series of any liquid level transmitter enclosure must be reliable grounding, grounding resistance should be less than 4 Ω.
13, according to the security gate flame-proof certification, its installation should be according to the requirements of the specification.
14, when the transmitter is used to "0" zone, grid power supply to the safety of the power transformer shall meet the requirements of article 8.1 GB3836.4-2000.
Nine, selection of code:

Ten, when placing order, please provide the following parameters:
1, model specifications: ZW - DBS601/602;
2, the name of the measured medium, medium density;
3, instrument measuring range: can also be referred to as the nominal length;
4, work stress: zui high pressure;
5, working temperature, low measuring liquid zui, zui high temperature;
6, material requirements: liquid material;
7, whether matching supply flange, bolts, nuts, valves, fittings, such as sealing washer;
8, flange standard: nominal size of the flange, 3/4 ", DN25, (, DN80, DN100 or 6;
9, special requirements: before ordering, please indicate in detail.

After-sales service commitment:

1, our company sold by liquid level transmitter series 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.