Double flange type remote liquid level meter

Productoverview:

ZW3051LDC series Is the introduction of a new type of differential pressure transmitter foreign advanced production technology and equipment, key raw materials, components and parts are imported from the machine, after strict assembly and testing, the product has advanced design principle, complete specifications, convenient installation and operation etc.. Due to the double flange level transmitter appearance completely fused currently popular two transmitters and widely used (Ross and Henghe 3051 Monte EJA) structure advantages, allowing users to find everything fresh and new feeling, at the same time with the traditional 1151, CECC series products in the installation can be directly replaced, there is very strong the versatility and ability to substitute. For the continuous improvement and development for domestic automation level, this series of double flange level transmitter in addition to the design of small and exquisite, launched more intelligent functions with HART Fieldbus protocol.

Two, work principle:

ZW3051LDC series double flange type remote liquid level gauge principle is when the measured medium pressure into two kinds of high and low pressure chamber two, role in the delta element (i.e. sensitive element) on both sides of the diaphragm, the spacer and components inside the filling liquid transferred to the measuring diaphragm on both sides. The liquid level transmitter is measured by the diaphragm and the both sides of insulation on the electrode sheet of each component of a capacitor. When the pressure is inconsistent, resulting in measuring diaphragm displacement, the displacement and the pressure difference is proportional to the capacitance on both sides from it, through stages of oscillation and demodulation, signal into proportional to pressure.

Third, measurement method:

Z3051DC/GC type differential pressure / pressure transmitter with remote seal device, has become a double flange level transmitter, it still has the characteristics of differential pressure / pressure transmitter. With the HART manipulator communicate with each other through setting, monitoring.

To avoid the measured medium directly and diaphragm contact transmitter, this measurement method is applicable to the following circumstances:

1, the medium is corrosive to the transmitter sensitive element;

2, needs to be measured medium and high temperature transmitter isolation;

3, measured in suspended solids or high viscosity medium medium;

4, measured by medium pressure tube at the same time easy solidification or crystallization;

5, the replacement of the measured medium need strict purification of measuring head;

6, the measuring head must maintain health, no pollution. Object: the use of corrosive or viscous liquid.

Note: vacuum situation should not use remote transmitter.

Four, application:

ZW3051LDC series double flange type remote liquid level meter can avoid the measured medium directly and transmitter diaphragm contact, this measurement method is applicable to the following situations:

1, viscous medium under high temperature.

2, crystallizing media.

3, precipitation medium with solid particles or suspended solids.

4, strong corrosive or toxic medium.

Can eliminate the pipe leakage phenomenon of the pollution of the environment; to be isolated by liquid, because the measurement signal is not stable, tedious work often supplement the isolation liquid.

5, continuous measurement of interface and density.

The remote device can avoid different instant mixing medium, the actual situation which makes the measurement results reflect the process of change.

6, cleaning requirements of high places.

Such as food, beverage and pharmaceutical industry production, not only requires the transmitter contact media site to meet health standards, and should be easy to wash, to prevent cross contamination of different mass media.

Five, main features:

1, one by one to simulate the "run" online examination, ensure the transmitter in ambient temperature, medium temperature and working pressure (including positive pressure or vacuum), stable and reliable work.

2, the "remote diaphragm structure dynamic surface, damaged the membrane cannot be overloaded; change accuracy does not occur after long time working.

3, the full penetration and rigid seal filling system structure, eliminate the occurrence of the oil leakage phenomenon.

4, the design of novel capillary components, the capillary reliableprotection, used in the field is not easy to break.

5, varieties, forms and sizes of various remote devices, as well as the rich filling liquid, can meet the needs of measuring various occasions.

6, can provide a variety of products with special needs, including high temperature, high vacuum, fast response and unequal length capillary (the difference is less than 4.5 meters). 8, small (2.4kg) stainless steel flange, easy to install.

Six, technical parameters:

Output signal: 4 ~ 20MA.DC two-wire (Analog)

Two line 4 ~ 20mA DC superimposed on the signal digital signal, linear or square output selected by the user.(Intelligence)

Power supply: 12 ~ 45V.DC (see map load)

Effect: <0.005% power output range /V

Influence of load: stable power supply, no load effect.

Measurement accuracy: adjustable range + 0.1%, + 0.2

(standard error is about 0.2%, if you choose other precision please specify. In order selection)

Range: 10:1 or 100 to 1

Damping: usually in 0.1 to 16 seconds between the adjustable, when filling liquid with inert or remote transmission device, the time constant will increase.

Start time: <2 seconds, without preheating

Work environment: the environment temperature of -29 to 93 DEG C (analog amplifier)

-29 ~ 75 C (digital / intelligent amplifier)

-29 to 65 DEG C (with display gauge)

The environmental humidity of 0 ~ 95%

Protective properties: protective ability of IP65

Explosion-proof type: flameproof type Exd II BT4-6

This type of Exia II CT5

The static effect of zero error: + 0.5%zui large range limit value for 32MPa in the pipeline under pressure by zero corrected.

The effects of electromagnetic radiation: 0.05%zui large range value, the radiation frequency is 27 ~ 500MHz, the test field 3V/m.

Indicator (%): LCD digital display precision + 0.2%

Effect of vibration: vibration direction of any 200Hz, 0.05%/g.

Installation position: the diaphragm is not installed vertically, may produce less than 0.24KPa by adjusting the zero error, but zero correction.

Weight: 3.9Kg (not including attachments)

Note: specifications on selected flange static pressure differential pressure transmitter on the remote.

The remote device is determined by the temperature, liquid filling type was selected.

The effect of the medium temperature remote transmitter is a remote device on both sides of the room temperature by the temperature effect of the same start at the same time, due to the change of output.

The influence of pressure and temperature are measured in a wide range of zui.

The length of the capillary Zui DP type remote differential pressure transmitter on both sides of 7.5 meters, 4.5 meters on both sides of the length difference.

Seven, there are four forms of remote device:

1, flat type remote device (3 "standard, the working pressure of 2.5MPa);

2, screw type remote device (Zui working pressure 10MPa);

3, flange mounted remote device;

4, insert the tube type remote device (standard 3 "or 4", working pressure of 2.5MPa).

Eight, attention matters and daily maintenance:

1, the use of double flange differential pressure transmitter, to inspect the diaphragm liquid filled the adequacy (how many businesses on the production requirements of electrode liquid filled different) such as too little, need to return to factory maintenance.

2, there is no solution in diaphragm and a long stem on sensor before use to check whether there is damage in need, the purpose is to make the pressure sensor, diaphragm rupture caused by oil mixed with measuring medium.

The use of protective sleeve should be 3, daily use of flange disassembly when not in use, should not be exposed outside the diaphragm.

4, can not long dry, often used to be kept in the electrode protection solution, but to soak activated before use.

5, measurement of acid alkali will reduce the electrode life greatly, so often need to buy special measurement of acid alkali resistance to acid and alkali for diaphragm.

6, cleaning the membrane rinse water should not be too large, do not use scrub brush iron or other metals.

7, flange tohandlegentlyand, diaphragm is very fragile, so as to avoid collision.

Nine, intelligent selection:

Remote liquidometer is a variant of additional remote device in the transmitter based on the subject, so the selection work can be divided into two steps: first determine the type of the main transmitter (DP), measuring range and structure of materials, and then according to the installation requirements to determine the size and type of remote transmission device. Because the parameters are composed of filling system (such as filling liquid temperature, viscosity and capillary length) is closely related with the performance of the transmitter, so as the main body of the transmitter selection category, no separate list selection.

Ten, the selection of encoding: