244LD Intelligent Displacer Level (Interface) Transmitter
Summary
244LD intelligent displacer level (interface) level transmitter is designed based on Archimedes Buoyancy Principle. It can be used for measuring liquid level, interface and density. The latest model of FDT/DTM technology can provide online calibration and diagnosis, durable in use. A wide range of material selection is suitable for different medium environment. 244LD intelligent displacer level (interface) transmitter in extreme temperature and pressure conditions can be reliable work. This Transmitter is available for any dangerous application.244LD intelligent displacer level (interface) transmitter is manufactured by Dandong Top Electronics Instrument (Group) Co. Ltd and FOXBORO, The transmitting head and other important parts are original products supplied by FOXBORO, the finished products are as per the original factory standard (FOXBORO).
OperatingPrinciple
The buoyancy of displacer 4 is transmitted to the sensor 3 via lever 1 and the torque tube 2. In measuring range, the voltage is proportional to the buoyancy, and as the input signal is transmitted to the electronic amplifier. Through the electronic amplifier, voltage is converted to 4-20 mA two-wires output signal. In the two-wires system mode, amplifier is powered by the signal current circuit.
Any part of the displacer immersed in liquid is adhering to the principle of Archimedes. By measuring buoyancy change of cylindrical displacer suspended in liquid, you can measure the liquid level, interface level or density.
When measuring the density and interface level, the displacer should be completely immersed in liquid. The change of the liquid level must be in range area.
The calculation of buoyancy:
FA= VX·ρ1·g+( V -VX) ·ρ2·g
In the formula：FA：Buoyancy
V：The volume of the displacer
VX：In the liquid density ofρ1, the medium volume displacerswaps out
ρ1：The average of the heavy medium density
ρ2：The average of the lighter medium density
g：The local acceleration of gravity
FG：Buoy its own gravity
244LD Intelligent Displacer Level (Interface) Transmitter
Technical features
·Power supply：12～42V DC
·Output Signal：4～20mA/20～4mA
·measurement range：300～3000mm(Beyond the range can be produced)
·nominal pressure：≤42.0MPa
·nominal diameter：DN40 or as customers’ request
·ambient temperature：－40℃～+85℃
·operating temperature：－196℃～+500℃
·accuracy rating：0.2class
·loadresistance：(Power supply -12V)/0.02A
·LED display：Five digits can be configured to %，mA or other physicalunit
·Medium boundary density difference：≥0.08g/cm3
·Torque tube material：standardconfigurationInconel600，or Monel、HasetlloyC-276
·chamber material:carbonsteel、304、316L or as customers’ request
·displacer material：304、316L or as customers’ request
·Flange standard：HG/T20592-2009、HG/T20615-2009 or as customers’ request
·cable entry：TwoNPT1/2(internalthread) or as customers’ request
·explosion-proof：Intrinsically safe ExiaⅡCT4
·protection class：IP66
1
244LD Intelligent Displacer Level (Interface) Transmitter
1
WWW.DDTOP.COM
Model Selection Table
Model / Code / Code Meaning144LD- / Intelligent Displacer Liquid Level Transmitter
1 / Liquid level measurement
2 / Interface level measurement
3 / Density measurement
A / Top-side mounted type
B / Top-bottom mounted type
C / Side-side mounted type
D / Bottom-side mounted type
E / Top mounted type
F / Offset type mounted type
S / “S” Top-bottom mounted type
1 / Nominal pressure≤PN2.5MPa、2.0Mpa(class150)
2 / Nominal pressure：PN4.0MPa
3 / Nominal pressure：PN6.3MPa、5.0MPa(class 300)
4 / Nominal pressure：PN10.0MPa、11.0MPa(class600)
5 / Nominal pressure：PN16.0MPa、15.0MPa(class900)
6 / Nominal pressure≤PN26.0MPa(class1500)
7 / Nominal pressure≤PN42.0MPa(class2500) Need to review
/
i / Explosion-proof：Intrinsically Safe Type
T / Chamber material：Carbon Steel
H / Chamber material：304(other brand according to the actual material to fill in)
L / mediumtemperature：-196℃≤T＜-30℃
D / mediumtemperature：-30℃≤T＜+100℃
G / mediumtemperature：100℃≤T≤500℃
/
Range / According to the actual fill in，default unit is mm
Attached with coding / F / Chamber with heating，DN15，PN2.5RF flange
connection (standardconfiguration)
Z / Chamber with heating，R1/2 male thread connection (standardconfiguration)
W / Transmitting head is installed at left hand
(Note no W for the right type of installation header)
244LD- / □ / □ / □ / / / □ / □ / □ / / / Range / □ / □
Example:
244LD-2C2/iTD/800F：means measuring interface，Side-side mounted type，nominalpressure is4.0MPa，Intrinsically safe intelligent transmitter，chamber material is carbon steel，Measuring fluid temperature is -30℃≤T＜+100℃，range is 800mm，heat chamber is flange interface type.
244LD Intelligent Displacer Level (Interface) Transmitter
Outline drawing and installation
1.The structure and size
H is the range in the picture below，nominalpressure≤PN6.3MPa .
A top-side mountedtype B Top-bottom mounted type C Side-side mounted type
D Bottom-side mounted type E Top mounted type
244LD Intelligent Displacer Level (Interface) Transmitter
2 The Installation orientation of smart level controller
Assemble theintelligent level controller to measuring chamber of displacer. Right type of installation is Controller installed onright of the displacer, torque tube rotates clockwise when liquid level rises. Left type of installation is Controller installed on the left of the displacer, torque tube rotates clockwise when liquid level rises.
1
WWW.DDTOP.COM
material / Process temperatureMin. / Max.
castiron / -29℃ / 232℃
steel / -29℃ / 427℃
stainlesssteel / -198℃ / 427℃
Monel / -198℃ / 371℃
Inconel / -198℃ / 600℃
- hastelloyC
graphiteflake/stainlesssteel gasket / -198℃ / 427℃
Monel / P.T.F.E / -73℃ / 204℃
3 Material and temperature
4 safety
Safety barrier recommendation table:
Shanghai I.S.Instruments & system Co.,Ltd / LS4041-ExGermany P+Fcompany / KFD2-STC3- Ex1
Shanghai Automation Instrument Institute / GS8041- Ex GS8045- Ex
Dandong Top Electronics Instrument (Group)Co.,Ltd. / TP5041- Ex TP5045- Ex
Longfei Group Corporation in China / LF1045
England / MTL3046B MTL5042 MTL706+
1
WWW.DDTOP.COM
Orderinginstruction
According to Model Selection Table selectoperating pressure and temperature
1
WWW.DDTOP.COM
Special wetted material grades
Instrument installation tag No.
Flange standard
Name and density of medium
Instrument accuracy grade