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Capacitance Pressure Transducer

time£º2018-10-22 14:24    source£ºshelok pressure transmitter

 Capacitance Pressure Transducer

 

Capacitance Pressure Transmitter is the result of a combination of self-developed anti-jamming, high stability digital circuits and the introduction of foreign Single crystal resonant silicon sensor technology. Its performance much better than our domestic metal capacitive sensor technology transmitter, and main show in the field zero stability and long-term operation stability, and rapid response.

 

Feature                                                                        

 

Single crystal resonant silicon sensor technology

Super performance, use to measure pressure, differential pressure and temperature..

Accuracy: ±0.075%~±0.1%F.S/±0.2%F.S

Stability: ≤0.2%

Standard 4¡«20mA,RS-485 communication interface

Support upgrade of basic scene control technique

 

Little temperature effect

 

Little static effect

 

Overload can reach 2 times

 

 

Application                                                                   

 

Compatible with 316LSS,noncorrosive liquids.   

Shipping and aviation industry.

Hydraulic pressure and pneumatic control system

Apply in Petroleum industry, chemical industry, electric power, metallurgy, hydrology etc process control.

 

 

 

Technical Data                                                                

 

Output

 

Analog output: two –wire 4-20mADC

 

Digital output: two –wire 4-20mADC and superimposing variable digital signal accord with HART

 

Power supply

 

supply voltage 24VDC

 

Limit load

 

Max load resistor Rmax in loop decided by the supply voltage, see the below drawing. HART PROTOCOL require the load resistor not less than 250Ω,not more than 600Ω

 

Communication distance

 

Max. 1.5Km, multi-address communication can connect 15 smart transmitters Max.

 

Display

 

4 digital display,5 digit LCD display, pointer type.

 

Explosion-proof

 

ExiaIICT5;explosion suppression type

 

Zero offset

 

Can positive transfer or negative transfer, but can not overstep the utmost value

 

Temperature

 

ambient temperature -40-85¡æ(When choose LCD : -20-70¡æ)

 

Medium temperature

 

-40¡«104¡æ

 

Static pressure and single side overpressure

 

3.45KPa(absolute pressure)¡«31.2MPa£¨gauge pressure£©

 

Relative humidity

 

5¡«98%RH

 

Run-up time

 

less than 5 sec.

 

Capability change

 

Less than 0.16cm3

 

Damp adjust

 

0.20¡«25 second

 

Malfunction alarming

 

If occur malfunction, automatism diagnose function will output 3.9 or 21.0mA

 

Configuration protection

 

To avoid the datas are modified random, can utilize software or protect switch lock the record data

 

  

 

 

 

Performance Data                                                             

 

Reference condition

 

zero is the lower limit and not offset, temperature 25¡æ, Atmospheric pressure, 24VDC power,silicon oil , diaphragm 316L, data adjust range the same as the up and lower limit of the range.

 

Accuracy

 

±0.075¡«±0.2%

 

Stability

 

≤0.2%URL/year

 

Tem. influence

 

±£¨0.05%URL£«0.15%FS£«200Pa£©20¡æ

 

Static pressure influence

 

zero error  0.1URL/6.9Mpa; Zero error 0.1URL/1.7MPa

 

Vibration influence

 

withstand frequency 200Hz at any direction, arouse error ±0.05%URL

 

Power influence

 

£¼0.005%/V

 

Load influence

 

no load influence

 

Mounting position influence

 

about 250Pa zero offset, can be eliminate via calibration, no range influence.

 

RF interference influence

 

drift is ±0.1%span in the condition of 30-1000MHz frequency and the most field intensity 10V/m

 

 

 

Configuration parameter                                                       

 

Wetted material

 

Diaphragm: 316LSS, Hastelloy , Monel or Tantalum

 

Vent /drain valve:316LSS, Hastelloy , Monel or Tantalum

 

Flange and joint : steel coated with cadmiumed ,galvanized steel, 316L SS, Hastelloy

 

O-ring:  Fluorin rubber

 

Other material

 

Filled: silicon oil

 

Bolt: galvanized steel

 

Electric housing: low copper and aluminium alloy or SS316

 

Cover O-ring:  NBR

 

Coating: polyester epoxy resin

 

Pressure port

 

Flange connection: 1/4-18NPT

 

Joint pressure port£º1/2-14NPT

 

Electrical connection

 

Lead tube connection: M20X1.5¡¢1/2-14NPT

 

Weight

 

5kg£¨no include option parts£©

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