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MDM3051S-DP Intelligent Pressure Transmitter
MDM3051S-DP Intelligent Pressure Transmitter

Measured range(with no shift): 0Pa~100Pa…3MPa
Output: 4mA~20mA DC analog output
Basic error: ±0.075%

Brief Introdution

Differential Pressure Transmitter (DP)

Measured media: gas, steam, liquid

Measured range(with no shift): 0Pa~100Pa…3MPa

Basic error: ±0.075%

Diaphragm contacting with liquid: Stainless Steel 316L, Hast-alloy C


Features

The central sensing element of transmitter uses the world’s leading high- Accuracy silicon sensor technology, Basic error is ±0.075%;

Working pressure of transmitter has three levels--16MPa, 25MPa and 40MPa, the highest one-way overpressure is 40MPa;

Excellent static pressure performance, optimal static pressure error ≤±0.1%/10MPa;

The inner of pressure sensor integrates high sensitive temperature sensor.

Excellent temperature performance, optimum≤± (0.20 ×TD+0.10)%×Span /-20℃~65℃;

All stainless steel 316L, silicone oil filling with welded sealing construction;

Stable and reliable, optimal long-term drift performance:±0.1%/year, 5-year maintenance-free;

Wide measured range: 100Pa~3MPa;

Max. 100:1 pressure range proportion adjustable;

EMC conforms to GB/T 18268.1-2008 standard;


Working Principle


Chart 1 Differential Pressure Transmitter (DP)


Differential pressure transmitter includes two functional units:

Main unit

Auxiliary unit

Main unit includes sensor and process connection, working principle as followed:

The sensor module uses whole welded technology, in which has a compact overload diaphragm, a differential pressure sensor and a temperature sensor. The temperature is taken as a reference for temperature compensation. The positive end of the differential pressure sensor is connected with high pressure chamber of sensor capsule; the negative end is connected with low pressure chamber of sensor capsule. Through the isolated diaphragm and filling liquid, the differential pressure is transmitted to silicon die in the inner of differential pressure sensor, which makes the resistor of sensor die change. So the detection system outputs different voltage. The output voltage is in proportion to the pressure variation, and then it is transmitted to standard output by adapter and amplifier.


Differential Pressure Transmitter (DP)

MDM3051S-DP Differential Pressure Transmitter is used for level, density, pressure and flow measurement of liquid, gas and steam. Then it will outputs 4mA~20mA DC HART signal and also it could be connected to RST375 hand communicator or RSM100 Modem to do the specification setting and process control.


Standard Specification

(Standard zero as the reference calibration range, Stainless steel 316L diaphragm, filling liquid is silicone oil)


1  Performance Specification

Reference Basic error for range calibration(including linearity, hysterisis and repeatability from zero): ± 0.075%

If TD>10 (TD=Max. Pressure range/calibration range), the Basic error is ±(0.0075×TD)%

The Basic error of square root output is 1.5 times of above reference Basic error.

Environmental Temperature Effect

Range Code

-20℃~65℃ Total effect value

Range Code

-40℃~-20℃和65℃~85℃Total effect value

A

±(0.45×TD+0.25)%×Span

A

±(0.45×TD+0.25)%×Span

B

±(0.30×TD+0.20)%×Span

B

±(0.30×TD+0.20)%×Span

C/D/F

±(0.20×TD+0.10)%×Span

C/D/F

±(0.20×TD+0.10)%×Span

Over range effect: ±0.075%×Span

Static pressure effect

Range Code

Effect value

A

±(0.5%Span)/4MPa

B

±(0.3%Span)/10MPa

C/D/F

±(0.1%Span)/10MPa

Overpressure effect

Range Code

Effect value

A

±0.5%×Span/4MPa

B

±0.2%×Span/16MPa

C/D/F

±0.1%×Span/16MPa

Long-term stabilityOverpressure effect

Range Code

Effect value

A

±0.5%×Span/1 year

B

±0.2%×Span/1 year

C/D/F

±0.1%×Span/1 year

Power effect ±0.001% /10V (12V~42V DC), negligible.

2  Functional Specification

Pressure range and limits

Range/Limits

kPa

mbar

A

range

0.1~1

1~10

limits

-1~1

-10~10

B

range

0.2~6

2~60

limits

-6~6

-60~60

C

range

0.4~40

4~400

limits

-40~40

-400~400

D

range

2.5~250

25~2500

limits

-250~250

-2500~2500

F

range

30~3000

0.3~30 bar

limits

-500~3000

-5~30 bar

Pressure range limit

The pressure is adjustable within the upper and lower limit.

It is recommended to choose the range code with the lowest pressure range proportion to optimize the performance specification.

Zero setting

The zero and pressure range could be adjusted to any value within the measured rang in the table, only the calibrated range ≥ Min. Range is valid.

Mounting position effect

The change of mounting position parallel to diaphragm could not influence the zero drift. If the angle between mounting position and diaphragm is over 90° , the zero drift is <0.4kPa which could be calibrated by zero setting. No other effect on pressure range.

Output

2- wire, 4mA~20mA DC, HART communication protocol, linearity or square root output optional.

Output signal limit: Imin=3.9mA,Imax=20.5mA

Response time

The damping constant of amplifier parts is 0.1s, time constant of sensor is 0.1s~1.6s, which is decided by the pressure range and pressure range ratio. The additional adjustable time constant is 0.1s~60s. The non-linearity output(eg. Square root output) is influenced by this function and could be calculated by it.

Warm-up time

< 15s

Environmental temperature

-40℃~85℃

With LCD display and viton sealing ring, the temperature is -20℃~65℃.

Storage temperature/ transportation temperature

-50℃~85℃;with LCD display:-40℃~85℃

Working pressure

Rated working pressure: 16MPa, 25MPa, 40MPa

Static pressure limit

From 3.5kPa absolute pressure to rated pressure, protection pressure can be pressurized to both high and low side of transmitter; and it can be higher than 1.5 times of rated pressure.

One-way overpressure limit

One-way overpressure could reach the rated pressure

EMC

Please refer to next page ”EMC table”


3  Installation
Power and load condition

Power supply: 24V DC, R≤(Us-12V)/Imax (kΩ)

Imax=23mA

Max. Voltage supply: 42V DC

Min. Voltage supply: 12V DC, 15V DC(Backlit LCD display)

Digital communication load resistance range: 250Ω~600Ω

Electric Connection

M20×1.5 cable sealing buckle, terminals are suitable for (0.5~2.5)mm2 wire.

Process connection

NPT 1/4 and UNF 7/16″ female at both sides of process connection flange.


4  Physical Specification

Material

Measuring capsule: Stainless Steel 316L

Diaphragm: Stainless Steel 316L, Hast-alloy C

Process flange: Stainless steel 304

Nut and bolt: Stainless steel(A4)

Filling liquid: silicone oil

Sealing ring: NBR, FKM, PTFE

Transmitter housing: Aluminum alloy material, epoxy resin glue sprays on the surface

Housing sealing ring: NBR

Nameplate: Stainless steel 304

Weight

3.3kg(not including LCD display, mounting support and process connection)

Housing protection

IP67

EMC Table

Code

Test terms

Standard

Test condition

Performance degree

1

Radiated interference(housing)

GB/T 9254-2008 table5

30MHz~1000MHz

qualified

2

Transmission interference

(DC power port)

GB/T 9254-2008 table1

0.15MHz~30MHz

qualified

3

ESD immunity

GB/T 17626.2-2006

4kV(contact)

8kV(air)

B

4

Radiofrequency 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

EFT immunity

GB/T 17626.4-2008

2kV(5/50ns,5kHz)

B


Note: 

(1) A degree:performance is normal within the technical standard range during testing.

(2) B degree: During, the function or performance is lowered or lost temporarily, but it could be recovered by itself. Actual operation state, storage and data will keep the same.


Outline Construction

Horizontal Piping Installation of mdm3051sdp differential pressure transmitter'' width=

Horizontal Piping Installation (side view)       Horizontal Piping Installation (front view)

wall Installation of mdm3051sdp differential pressure transmitter'' width=

Wall Installation                              Vertical Piping Installation


Electric Construction
electric connection of mdm3051sdp differential pressure transmitter'' width=

Note: the function of shortcut interface is equal to signal terminal.


Process connection instruction

process connection intruction of mdm3051sdp differential pressure transmitter'' width=





Order guide

MDM3051S-DP

Intelligent Differential Pressure Transmitter

 

 

Code

Output

 

H

4mA~20mA DC with HART

 

 

 

Code

Pressure Range

A

0-100Pa~1kPa(0-10~100 mmH2O)/(0-1~10mbar)

B

0-200Pa~6kPa(0-20~600 mmH2O)/(0-2~60mbar)

C

0-400Pa~40kPa(0-40~4000 mmH2O)/(0-20~400mbar)

D

0-2.5kPa~250kPa(0-0.25~25 mH2O)/(0-25~2500mbar)

F

0-30kPa~3MPa(0-3~300 mH2O)/ (0-0.3~30bar)

 

 

Code

Diaphragm material Filling

 

A

Stainless steel316L silicone oil

 

C

Hastelloy C silicone oil

 

 

Code

Rated working pressure

 

0

0.2MPa (only for range A)

 

7

7MPa (only for range A)

 

1

16MPa

 

2

25MPa

 

3

40MPa

 

 

 

Code

Process connection

 

 

 

N

1/4 NPT and 7/16 UNF thread hole without release valve

B

1/4 NPT and 7/16 UNF thread hole, release valve mounting in the end-face of flange back

U

1/4 NPT and 7/16 UNF thread hole, release valve mounting in upper flange side

D

1/4 NPT and 7/16 UNF thread hole, release valve mounting in lower flange side

 

 

Code

Sealing materials contacting with liquid

 

N

NBR

 

F

FKM

 

P

PTFE

 

 

 

Code

Additional function

 

N

None

 

F

Square root output

 

O

No oil processing(For oxygen measurement: fluorocarbon oil filling, viton sealing ring ,<6MPa,<60℃)

 

 

 

Code

Mounting bracket

N

None

1

Stainless steel

2

Galvanized Carbon Steel

 

 

Code

Process connection parts

N

None

1

1/2 NPT Female with stainless steel oval flange

2

M20×1.5 male with stainless steel T joint

3

1/2-14NPT guiding pressure transition joint and rear welding guiding pressure tube (SS)

 

 

Code

Display

N

None

1

LCD with back-light

 

 

Code

Others

N

None

A

Intrinsic safe

D

Exd version with Explosion-proof cable joint

S

Stainless steel 316 plate

T

Ship-use

 

 

    MDM3051S-DP H C[0~20kPa]          A        1 B                     N     F       1          1            1            A     The whole spec.



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