⎝⎛星力捕鱼⎞⎠

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Flow meter series
Temperature instrument series
Pressure instrument series
Calibration instrument series
Level instrument series
Digital display instrument series
Transmitter instrument series
Wire and cable series
Bridge instrument cabinet series
Pipe fitting valve series

Address: Xiongyi, Jinhe Road, Jinhu County, Jiangsu Province
Lunan
Phone: 0517-86900901
0517-86900921
0517-86900920
Fax: 0517-86900902
Postcode: 211600
http://zzyfwh.com
Email: chinadongxiang@163.com
Transmitter instrument
Pressure (including negative pressure) transmitter

Working principle of pressure (including negative pressure) transmitter
The two pressures of the measured medium pass into the high and low pressure chambers, and act on the isolation diaphragms on both sides of the delta element (ie, the sensitive element), and are transmitted to both sides of the measurement diaphragm through the spacer and the filling liquid in the element. Capacitive transmitters are composed of a measuring diaphragm and electrodes on both sides of the insulating sheet. When the pressure on the two sides is inconsistent, the measurement diaphragm is displaced. The displacement is proportional to the pressure difference, so the capacitance on both sides is not the same. Through the oscillation and demodulation links, it is converted into a signal proportional to the pressure. The working principle of pressure (including negative pressure) transmitters is the same as that of differential pressure transmitters, except that the pressure in the low-pressure chamber is atmospheric or vacuum. The A / D converter of the pressure (including negative pressure) transmitter converts the current of the demodulator into a digital signal, and its value is used by the microprocessor to determine the input pressure value. In addition, it performs operations such as sensor linearization, resetting the measurement range, engineering unit conversion, damping, rooting, and sensor trimming, as well as diagnostics and digital communications.


Analog characteristics
1. High accuracy Analog accuracy: + (-) 0.75% + (-) 0.1% FS
2.The range and zero are continuously adjustable externally
3. Good stability
4, positive migration can reach 500%, negative migration can reach 600%
5. Second-line system
6, adjustable damping, resistance to over-voltage
7.Solid sensor design
8, no mechanical moving parts, less maintenance
9. Light weight (2.4kg)
10.The entire series has a unified structure and strong interchangeability
11, miniaturization (166mm total height)
12.The material of the diaphragm that contacts the medium is optional
13, unilateral anti-overpressure
14. Intelligent features of low-pressure cast aluminum alloy shell:
1. Super measurement performance for pressure, differential pressure, liquid level and flow measurement
2. Digital accuracy: + (-) 0.05%
3. Full performance: + (-) 0.25FS
4. Stability: 0.25% for 60 months
5. Range ratio: 100: 1
6. Measurement rate: 0.2S
7, miniaturized (2.4kg) all stainless steel flange, easy to install
8. The process connection is compatible with other products to achieve the best measurement
9. The only sensor (patented technology) using H alloy sheath in the world, achieving excellent cold and heat stability
10.Smart transmitter using 16-bit computer
11. Standard 4-20mA, with digital signal based on HART protocol, remote control
12. Support the upgrade to fieldbus and field control-based technology.

Selection:

DX-1851 / 3851GP

Pressure (including negative pressure) transmitter

Pressure measuring range

2

0.11 Kpa 0 0.11 Kpa

3

16KPa 0 1 to 6KPa

4

640Kpa 0 640Kpa

5

40250Kpa 0 40250Kpa  

6

0.161Mpa 0 0.16 to 1Mpa

7

2.5Mpa 0—0.4 2.5Mpa

8

1.610Mpa 0 1.610Mpa

9

425Mpa 0 425Mpa

0

640Mpa 0 640Mpa

output signal

N

  20mA Ordinary analog output: 4 to 20mA

G

20mA Conventional intelligent output: 4 to 20mA

S

  20mA+HART总线协议 Standard intelligent output: 420mA + HART bus protocol

Structural materials

Code

Flange joint

排液阀 Bleed / drain valve

Isolation diaphragm

Filling liquid

J1

不锈钢 316 stainless steel

不锈钢 316 stainless steel

不锈钢 316 stainless steel

silicon    oil

J2

不锈钢 316 stainless steel

不锈钢 316 stainless steel

276 Hastelloy C276

J3

不锈钢 316 stainless steel

不锈钢 316 stainless steel

Monel

J4

不锈钢 316 stainless steel

不锈钢 316 stainless steel

Tantalum

measurement accuracy

Q1

   FS 0.2 % FS

Q2

   FS 0.5 % FS

Electrical connector

L1

  × 1.5内螺纹 M20 × 1.5 internal thread

L2

  内螺纹 1 / 2NPT internal thread

Display method

M0

  Without any display (optional)

M1

   100 %线性指示表头 0 to 100 % linear indicator

M3

液晶显示数字表头 LCD digital meter

Installation method

B1

  ″管装弯支架 2 "pipe mounting bracket

B2

  板装弯支架 Wall / Board Mounted Bracket

B3

  ″管装平支架 2 "Tube Mounted Flat Bracket

Drain valve installation form

D0

  Drain valve in the middle of the pressure chamber

D1

  Side relief valve on top of pressure chamber

D2

Side relief valve under the pressure chamber

Interface method

C0

  ″— 14NPT锥管内螺纹接头 1/2 ″ — 14NPT taper pipe female thread joint

C1

″— 14NPT引压接头及后部焊接引压管 1/2 ″ — 14NPT impulse joint and welded impulse pipe at the rear

Ф 14

C2

  × 1.5 T-shaped screw joint M20 × 1.5

Explosion-proof type

d

 CT5 Flameproof ExdCT5

i

 CT4 Intrinsically safe ExiaCT4

N

  No explosion protection required (optional)

List of complete model selection:     8SJ1Q1L1M3B1D2C1 DX1851 / 3851GP8SJ1Q1L1M3B1D2C1