Introduction

Principle & Structure

The intelligent LV80 hydrostatic level transmitter is used to measure the pressure of the medium and finally convert it into the change of the liquid level. The fully sealed б capacitance sensitive element is used to make the liquid level measurement have high measurement accuracy and at the same time ensure excellent stability and reliability. Use them to set, monitor, test and configure. The HART protocol uses the industry standard BELL202 frequency phase shift keying (FSK) technology to realize communication by superimposing the digital signal of 1200HZ or 2200HZ on the signal of 4…20mA, and the communication frequency signal does not cause any interference to 4…20mA.

Features

● High precision, high reliability, high stability

● Zero point and range can be adjusted on site

● Long life, can be used for continuous monitoring of liquid level

● Remote diaphragm sealing device is optional

● Various corrosive media can be measured according to the choice of different diaphragm materials

● Explosion-proof type optional

● Damping can be adjusted

application

Suitable for liquid level monitoring and pipeline pressure monitoring of medium and large tanks

Suitable for the measurement of liquids in tanks, tanks, pits, and corrosive liquids

Mainly used in wastewater/purification treatment, shipbuilding, generator equipment, petrochemical, food

Electronics, dyeing and finishing, chemical, rubber and plastics, hydraulic machinery, chemical and pharmaceutical industries.

technical parameter


Range:see selection table
output:The HART digital signal is superimposed on the two-wire 4-20mA DC signal
Accuracy:0.2 level, 0.5 level optional
stability:≤±0.45%/55℃
Installation location affects:When the sensor diaphragm is not vertical, it may produce no more than
Zero system error of 0.24Kpa, this error can be corrected by zero adjustment
Vibration Effects:±0.1% maximum range limit
Power Effects:Less than 0.0055/V of output range
Power supply:12…30VDC
Overload pressure:1.5 times the range
load:The maximum load resistance R of the circuit board: R=(V-10.5)/0.-236, where
R is the maximum load resistance Ω; V supply voltage (see left figure)
Start Time:5Sec
refresh time:0.25Sec
Span and Zero Adjustment:Adjustment through security check or adjustment using HART communicator
Positive and negative transfer:The maximum positive migration is the upper limit of the measurement range (URL) and the measurement
The maximum negative migration amount of the difference between ranges is URL
Error alert:The self-diagnostic routine has detected a fault, the analog output is higher than 20.8mA or
Below 3.8mA alarm, high/low flag adjusted via HART communicator
Operating temperature:Electronic circuit: -30…85℃, sensitive element (filled with silicone oil):
-40…104℃; (filled with inert oil): -0…70℃
Medium temperature:-40…104℃ (limit)
storage temperature:-40…125℃
Relative humidity:5%-98%
Protection class:IP65
Structural materials:The electrical shell is made of aluminum alloy, and the other parts and materials are shown in the selection table.
Pressure guide connection:The connection hole on the pressure chamber is 1/4-18NPT, and the connection on the pressure fitting
The hole is 1/2-14NPT
Electrical connections:M20×1.5 screw holes for connecting cable ducts
weight:About 3.9kg (excluding accessories)

Selection table

LV80-Intelligent flanged liquid level transmitter

Measuring range

0…40Kpa

0…250Kpa

0…1000Kpa

output

4…20mA/with HART protocol

precision

Level 0.2

Level 0.5

Specification

DN50

DN80

DN100

Sensor insertion depth

0mm

50mm

100mm

150mm

Wetted diaphragm material

316L

Hastelloy C-277

Monel

Tantalum

Flange material

Stainless steel

Stainless steel

Protection type

Standard

Flameproof

Intrinsically Safe
This selection table does not contain complete data. For selection, please contact sales or email sales@kewill-auto.cn to obtain a complete sample.
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