LFT710 Single-Crystal Silicon Differential Pressure Transmitter-LEFOO

LFT710 Single-Crystal Silicon Differential Pressure Transmitter

■Utilizes MEMS single-crystal silicon high-precision pressure sensor

■Fast response,high stability,and measurement accuracy of 0.075%FS

■Maximum turndown ratio of up to 100:1

■Dual overload protection technology,with strong overload capability,unidirectional pressure up to 10 MPa

■Provides standard HART bus communication mode,with comprehensive self-diagnosis and remote communication functions

■High-brightness LCD display with backlight,featuring a reversible local display screen

■Local zeroing function,local zero and span adjustment and calibration functions

■Convenient local current loop verification function

■Three output modes:RS485,4~20mA+HART,and 4~20mA

Products Description

OVERVIEW

LFT710 Differential Pressure Transmitter adoptsmonocrystalline silicon sensor chip made in Germany withadvanced MEMS technology,with built-in temperaturecompensation element.It provides high accuracy and long-termstability over wide range of static pressure and temperaturevariations,can be used to measure the pressure of liquids,gases or steams in many fields,such as industrial processcontrol,automation manufacturing,aerospace,automotive andmarine,petroleum and electronics.LFT710 can accuratelymeasure differential pressure and convert it into 4~20mA outputIt can be operated by three buttons on the Transmitter,orhrough Hand Manipulator or Configuration Software.

STANDARD SPECIFICATIONS

Pressure range is calibrated based on the standard zero pointstainless steel 316L diaphragm,illed liquid is silicone oil.

PERFORMANCE REQUIREMEN

Overall performance includes but not limited o referenceaccuracy,static pressure influence,ambient temperatureinfluence,and other influence.

Typicalaccuracy:±0.075%of Upper Range Value(URV)

Annual stability:±0.2%of Upper Range Value(URV)

1)Pressure calibration reference accuracy
Including linearity,hysteresis and repeatability from zero point
Linear output accuracy	Td≤10	±0.075%	Standard range: 6kPa、40kPa、 250kPa、1MPa、 3MPa
	10<TD≤100	±0.0075TD%
TD is range turn down ratio. when \|URV\|≥\|LRV\|,TD=URL//URV when \|URV\|≤\|LRV\|,TD=URL/\|LRV\|

2)Power supply influence
Zero Influence	±0.15*TD%URV	per	10MPa
Full scale influence	±0.2*TD%URV	per	10MPa

3)Ambient temperature influence on partial gaugepressure range

For 6kPa or lower ange,the accuracy under roomtemperature is 0.075%,but if within fullrange of-20-70℃,the accuracyis 0.15%.

4)Power supplyinfluence

When the power supply voltage varies within 12-36 VDC,if zero point and span variation not exceed±0.005%*URVner yoltaae the influence can he ianored

FUNCTIONAL SPECIFICATION

1)Range
Gauge pressure
Range/Upper and lower range limits(URL&LRL)		kPa	Range ratio TD
B	Range	0.2~6	1~30
	URL&LRL	-6~6
C	Range	0.4~40	1~100
	URL&LRL	-40~40
D	Range	2.5~250	1~100
	URL&LRL	-100~250
E	Range	20~1000	1~100
	URL&LRL	-500~1000
F	Range	30~3000	1~100
	URL&LRL	-500~3000

Differential Pressure Transmitter