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DP Transmitter LFT810

LEFOO high quality LF810 series differential  pressure transmitter is using to  measure the level, density, pressure and  flow of liquid, gas or steam, and then  convert it into a 4-20mADC HART  current signal output. It can also  communicate with HART375 or HART475  communicator for parameter setting and  process monitoring.

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Specification of DP Transmitter LFT810


LF810-DPLF810-DP Intelligent Differential Pressure Transmitter
Code 1Measuring range
B0.2~6 KPa
C1.0~40KPa
D2.5~250KPa
E10~1000KPa
F30~3000KPa
Code 2Output
EStandard intelligent (4~20) mA DC two-wire system + HART protocol digital
communication
JStandard intelligent (4-20) mA DC two-wire system + HART protocol digital
communication + square signal output
Code 3Isolation diaphragm
22316L Stainless steel
23Hastelloy C
24Monel
25Tantalum
Code 4Filling fluid
DSilicone oil
FFluorine oil
Code 5Electrical Interface
MM20×1.5internal thread
N1/2NPTinternal thread
Code 6Relief valve position
ANo relief valve (with plug)
BUpper side of process flange
CLower part of the process flange side
Code 7Mounting brackets
NWithout mounting bracket
B1Tube bending bracket (carbon steel)
B2Panel mounting bracket (carbon steel)
B3Tube mounted flat bracket (carbon steel)
B5Tube bending bracket (stainless steel)
B6Pan-mounted curved bracket (stainless steel)
B7Tube mounted flat bracket (stainless steel)
Code 8Static pressure
A10MPa
B16Mpa
C25MPa
Code 9Explosion-proof grade
NCommon type (no explosion-proof)
DFlameproof ExdⅡCT6
IIntrinsically safe explosion-proof type ExiaⅡCT6
Code 10Accuracy class
20.2
50.5
70.075
60.065
80.05


Option code

Option

N

With "waist" shaped joint: NPT1/2 taper pipe internal thread

J

With "T" shaped joint: M20×1.5 external thread and welding pressure tube (stainless steel) at the rear

F

With "waist" shaped joint plus NPT1/2 pressure transfer head and back welding pressure tube (stainless steel)

P

No process connection (l/4 NPT female thread on chamber flange)

K

Degreasing and washing treatment

L

Hanging tag

H

Lightning protection (transient voltage resistance)

E

English nameplate

V3

Three valve group

V5

Five valve group

M5

LCD liquid crystal display

N

No header

Electromagnetic compatibility schedule

No.

Test items

Basic standard

Test Conditions

Performance level

1

Radiation interference (housing)

GB/T 9254-2008  Table 5

30MHz~1000MHz

Qualified

2

Conducted interference

(DC power port)

GB/T 9254-2008 Table1

0.15MHz~30MHz

Qualified

3

Electrostatic discharge (ESD) immunity

GB/T 17626.2-2006

4kV(Contact)

8kV(Air)

B

4

RF electromagnetic field immunity

GB/T 17626.3-2006

10V/m (80MHz~1GHz)

A

5

Power frequency magnetic field immunity

GB/T 17626.8-2006

30A/m

A

6

Electrical fast transient pulse group immunity

GB/T 17626.4-2008

2kV(5/50ns,5kHz)

B

7

Surge immunity

GB/T 17626.5-2008

1kV(Between lines)

2kV(Between line and ground)(1.2us/50us)

B

8

RF field induced conducted interference immunity

GB/T 17626.6-2008

3V(150KHz~80MHz)

A


Standard


Adjust the range based on the standard zero points, stainless steel 316L diaphragm, filling fluid is silicone oil

 

1Performance specifications

Adjust the reference accuracy of the range

Including linearity, hysteresis, and repeatability from zero

± 0.075%

If TF>10 (TF=Maximum range/adjustment range) then

±(0.0075×TF)%

The square root output accuracy is 1.5 times the above linear reference accuracy

Optional highest accuracy 0.05%.



Environmental temperature influence


Range Code

-20℃~70℃ Total influence

A

±(0.20×TF+0.10)%×Span

B

±(0.10×TF+0.10)%×Span

C/D/E

±(0.075×TF+0.10)%×Span

Range Code

-40℃~-20℃ and 70℃~85℃Total influence

A

±(0.20×TF+0.10)%×Span

B

±(0.10×TF+0.10)%×Span

C/D/E/F

±(0.075×TF+0.10)%×Span

 

Other Influences


Range Code

OverPressure Influence

 Long Term Influence

Static Pressure Influence

A

±0.2%×Span/4MPa

  ±0.2%×Span/1year

±(0.15%URL+0.10%Span)/4MPa

B

±0.2%×Span/16MPa

  ±0.2%×Span/1year

±(0.10%URL+0.075%Span)/16MPa

C/D/E/F

±0.1%×Span/16MPa

  ±0.1%×Span/1year

±(0.05%URL+0.05%Span)/16MPa

Power influence: ±0.001% /10V (12~42V DC),Negligible。                                         



 

2:Functional specifications

 Range and Scope

Range/Scope

KPa

mbar

A

Range

0.2~1

2~10

Scope

-1~1

-10~10

B

Range

0.2~6

2~60

Scope

-6~6

-60~60

C

Range

0.4~40

4~400

Scope

-40~40

-400~400

D

Range

2.5~250

25~2500

Scope

-250~250

-2500~2500

E

Range

10~1000

0.1~10 bar

Scope

-500~1000

-5~10bar

F

Range

30~3000

0.3~30 bar

Scope

-500~3000

-5~30bar


Description of DP Transmitter LFT810

  • Configurable using zero/span buttons mean no calibrator required reducing time to install and running

  • Range-ability and selectable engineering units, allows the transmitter to fit many applications reducing the number of different transmitters to meet specifications

  • High accuracy (±0.075%) provides an exceptional measurement for ensuring tight control and minimizing costly out of specification conditions

  • Automatic sensor temperature compensation improves the performance of the device for accurate measurement under different operating environments

  • Fail-mode process function stores configuration settings in the event of shutdown or power-loss provide for faster restart to getting application back on-line

  • A HART® Communication programmable device provides a reliable, long-term solution for plant operators who seek the benefits of intelligent devices with digital communication


Application of Differential Pressure Transmitter LFT810

  • Flow measurement Level monitoring

  • Filter or pump differential pressure

  • Critical process monitoring

  • Closed Tank Level, Density, Filter health


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