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level meter

ZTD-G Smart Displacer Level (Interface) Transmitter
ZTD-G Smart Displacer Level (Interface) Transmitter
Summary
ZTD-G Smart Displacer Level (Interface) Transmitter is a product developed by Dandong Top Electronics Instrument Co., Ltd , the technicians research for many years and accumulate lots of experience, absorb the advantages of inland & foreign product, the performance can reach international leading level now. ZTD-G Smart Displacer Level (Interface) Transmitter can be used to measure level, interface or density, output signal of 4-20mA +HART. By using compatible HART Communicator, not only can you check, configure, calibrate, or test the smart level transmitter, but also you can receive the messages from a single controlling loop and download the information from site into control system.
  • Operating Principle
  • Technical Parameter
  • Model Selection Table
  • Outline and installation
  • Ordering information
ZTD-G Smart Displacer Level (Interface) Transmitter consists of DLT9000 level transmitter, measuring chamber, measuring mechanism, displacer and torque tube, etc. The liquid level changing triggers the change of the buoyancy of displacer, then it will be transferred into the torque tube unit. This makes the torque tube and core axle rotate synchronously. At the same time, the magnetic steel parts that fixed at the core axle of the torque tube turn rotary displacement. The Hall-effect sensor senses the magnetic field change and converts the magnetic signals into current signals. DLT9000 level transmitter uses micro-controller and related electronic circuit to measure process variable, supply current output, drive LCD and support HART communication. Micro-controller receives the electric signals that have been temperature-compensated and linearised. Meanwhile, compensates the liquid density change caused by the change of the process temperature, then supplies 4~20mA current output signals. LCD can indicate analog output, process variables, process temperature (if RTD is installed), degrees of the torque tube rotation and percent range of variable, etc.

 
Power supply: 12~30V DC; the controller has reverse polarity protection.(when HART is
communicating, the voltage of controller ≥17.75V DC)
Output signal:  4~20 mA DC (Positive direction – the increase of level, interface, or density make output increase; Negative direction – the increase of level, interface, or density make output decrease.)
Measuring range: 300mm—2500mm (can also over range)
Nominal pressure: ≤42.0MPa
Nominal diameter: DN40 or as customers’ request
Ambient temperature: -40 ºC to +80 ºC (when ≤–30ºC, no LCD display.)
Operating temperature: –70ºC to +400ºC
Measuring accuracy: 0.5%
Influence from power supply: When the voltage of the power supply varies between min. and max. ,the output change is within <±0.2%. of the full scale.
LCD display: Output current signal、process variable、process temperature、percentage range、rotation angle of torque tube.
Medium density difference: ≥0.08g/cm³
Material of torque tube: Standard configuration Inconel 600,or Monel, HasetlloyC-276
Wetted material: 304、316L or as customers’ request
Flange standard: HG/T20592-2009、HG/T20615-2009 or as customers’ request
Power entry: Two M20×1.5 (female) or as customers’ request
Explosion-proof:
IECEx
Ex ia ⅡC T5 Gb(-40℃≤Tamb≤80℃)Ui=30Vdc;Ii=93mA;Pi=0.7W;Ci=0nF;Li=22μh
Ex d ⅡC T5~T6 Gb T5:-40℃≤Tamb≤80℃;T6:-40℃≤Tamb≤60℃
CE ATEX
Ex ia ⅡC T5 Gb(-40℃≤Tamb≤80℃) ; Ui=30Vdc;Ii=93mA;Pi=0.7W;Ci=0nF;Li=22μH
Ex d ⅡC T5~T6 Gb T5:-40℃≤Tamb≤80℃;T6:-40℃≤Tamb≤60℃
PCEC  
Ex ia IIC T5 (Tamb<80℃);T6 (Tamb<60℃);Ui=30Vdc ;Ii=93mA; Pi=0.7W ;Ci=0nF ;Li=22μH;
Ex d IIC T5  T5:-40℃≤Tamb≤80℃;T6:-40℃≤Tamb≤60℃
Protection grade: IP66
Alarm jumper: For the self-diagnosis to the inaccuracy failure of the process variables (for example, the electronic module failure). Configure the process variables of high and low alarms.

 
 

Model

Code

Code Meaning

ZTD-GZ

 

Smart Displacer Level (Interface) Level Transmitter

 

1

 

Level measurement

2

 

Interface measurement

3

 

Density measurement

 

A

 

Top-side mounted

B

 

Top-bottom mounted

C

 

Side-side mounted

D

 

Bottom-side mounted

E

 

Top mounted

F

 

Side mounted

S

 

Top-bottom S style mounted

 

1

 

Nominal pressure ≤PN2.5MPa, 2.0Mpa (Class 150)

2

 

Nominal pressure: PN 4.0 MPa

3

 

Nominal pressure: PN 6.3 MPa, 5.0MPa (class 300)

4

 

Nominal pressure: PN 10.0 MPa, 11.0MPa(class 600)

5

 

Nominal pressure: PN 16.0 MPa, 15.0MPa(class 900)

6

 

Nominal pressure: PN 26.0 MPa(class 1500)

7

 

Nominal pressure: PN 42.0 MPa(class 2500) need to review

 

/

 

 

 

i

 

Explosion protection: intrinsically safe

d

 

Explosion protection: explosion isolation

 

T

 

Chamber material: carbon steel

H

 

Chamber material: 304(others as actual fill in)

 

L

Medium temperature:-70℃≤T<-30℃

D

Medium temperature:-30℃≤T<+100℃

G

Medium temperature:+100℃≤T≤+400℃

 

/

 

 

 

Range:According to actual fill in, unit is mm.

Additional code

F

 

Chamber with heating, flange connection DN15, PN2.5 RF

Z

 

Chamber with heating, thread joint R1/2

 

W

Left mounted transmitter (without “W” is right mounted transmitter)

Example
ZTD-G2C3/iTD/800F: smart displacer, measuring interface, side-side mounted, nominal pressure is PN6.3MPa or PN5.0MPa intrinsically safe, chamber material is carbon steel, medium temperature-30℃≤T<+100℃, measuring range is 800mm, chamber with heating, flange connection with heating tracing.
1. The structure and size
H in following chart is measuring range, nominal pressure ≤6.3Mpa. Size in bracket is product with heat insulation sleeve.





2. Mounting orientation of the smart level controller
Mount the controller on the chamber. When the controller is mounted on the right of the displacer chamber, the transmitter is called right-mounted, so when the level increases, torque tube turns in clockwise. When the controller is mounted on the left of the displacer chamber, the transmitter is called left-mounted, so when the level increases, torque tube turns in counter-clockwise.
 

3. Material and application temperature:

Material

Process temperature

Minimum

Maximum

Cast Iron

-29ºC

+232ºC

Steel

-29ºC

+427ºC

Stainless Steel

-198ºC

+427ºC

Monel

-198ºC

+371ºC

Inconel

-198ºC

+600ºC

Hastelloy C

-198ºC

+400ºC

Graphite Laminate/SST Gaskets

-198ºC

+427ºC

Monel/PTFE

-73ºC

+204ºC

4. Safety barrier recommendation table:

Shanghai I.S.Instruments & system Co.,Ltd

LS4041-Ex

Germany P+F Company

KFD2-STC3-Ex1

Shanghai Automation Instrument Institute

GS8041-Ex; GS8045-Ex

Dandong Top Electronics Instrument Co., Ltd

TP5041-Ex; TP5045-Ex

Longfei Group Corporation in China

LF1045

England

MTL3046B; MTL5042; MTL706+

Please select product model according to the model selection table.
◆  Medium operating pressure & temperature
◆  Special wetted material brand name
◆  Tag number
◆  Flange standard
◆  Medium name & density
◆  Instrument accuracy