Converters Pressure D – 3 – Industrial Measurement Equipment Trading FZ-LLC

Converters Pressure D – 3

Purpose

Converters pressure D-3 (hereinafter – converters) intended For continuous measurements absolute pressure, from excess pressure, pressure discharge, differential pressure And transformations measured values V unified day off signal permanent current 4-20 mA And digital day off signal on base HART protocol. Converters intended For measurements pressure

Region applications

Pressure transducers are used in automatic control systems, regulation And management technological processes V various industries industry.

Principle actions

Principle actions converters founded on use dependencies between measurable pressure And elastic deformation of the sensitive element. A membrane is used as a sensitive element , which mechanically acts on the dielectric , on which posted strain-sensitive semiconductor circuit from four silicon strain gauges , united V Wheatstone bridge . The pressure of the measured medium is transmitted through the separating membrane And filling liquid on sensitive element, causing at this deformation sensitive element And change values electric resistance strain gauges Wheatstone Bridge . Difference potentials on exit bridge Wheatstone depends from the current pressure. The converter electronics processes the received changes resistance And transforms V unified current day off signal 4-20 mA or V digital signal on base HART protocol . To display information, converters are optionally can be equipped residential complex display.

The converter consists of a sensor module and an electronic unit. Sensor module consists of from measuring block And boards analog- digital converter (ADC).

Converters can be manufactured V nipple or flanged versions.

In nipple-type converters, the measuring unit consists of from dividing membranes And sensitive element, the space between them is filled with a separating liquid ( silico – new oil).

IN converters flanged execution measuring block consists of from dividing membranes with sides high pressure and dividing membranes with sides low pressure. The cavity between membranes filled dividing liquid ( silicone – howl oil). Sensitive element posted inside closed cavity filled with separating liquid. The measuring unit also has protective membrane from reloading pressure.

Frame electronic block consists of from two sections, hermetically sealed isolated from each other. One section contains the terminal block, the other contains the electronics board and LCD display. The electronics housing is closed lids With seals.

Main technical characteristics

Name characteristics	Meaning
Measurable Wednesday	liquid, gas, steam
Converter D-3-G Converter D-3-A Converter D-3- D	measurement excess pressure measurement absolute pressure measurement differential pressure
Range measurements, kPa – Converter D-3- G – Converter D-3- A – Converter D-3- D	from -100 to 60000 from 0 to 3000 from -500 to 2000
Range temperatures measurable Wednesday, °C	from -40 to +120
Day off signal	from 4 to 20 mA; from 4 to 20 mA + HART
Voltage nutrition (constant current), IN	from 12 to 42
Conditions operation: – temperature surrounding Wednesday, °C – relative humidity air, % – atmospheric pressure, kPa	from -40 to +85 1) from 0 to 100 from 84 to 106.7
Average term services, years	12
Average development on refusal, h	75,000

Performance display provided V range from -30 to +65 °C

Ranges measurements converters

Model	KDI 1)	Range dimensions 2)	Tuning range	Overload pressure
D-3- G	0	from -6 to 6 kPa	from 0.6 to 6 kPa	200 kPa
	1	from -40 to 40 kPa	from 2 to 40 kPa	1000 kPa
	2	from -100 to 250 kPa	from 2.5 to 250 kPa	4000 kPa
	3	from -100 to 6000 kPa	from 60 to 6000 kPa	18,000 kPa
	4	from -100 to 10000 kPa	from 100 to 10000 kPa	20,000 kPa
	5	from -100 to 21000 kPa	from 210 to 21000 kPa	40,000 kPa
	6	from -100 to 40,000 kPa	from 400 to 40,000 kPa	50,000 kPa
	7	from -100 to 60000 kPa	from 600 to 60000 kPa	70,000 kPa
D-3- A	0	from 0 to 40 kPa	from 2 to 40 kPa	100 kPa
	1	from 0 to 250 kPa	from 2.5 to 250 kPa	400 kPa
	2	from 0 to 3000 kPa	from 30 to 3000 kPa	5000 kPa
D-3- D	0	from 0 to ±1 kPa	from 0.1 to 1 kPa	40 kPa
	1	from 0 to ±6 kPa	from 0.2 to 6 kPa	100 kPa
	2	from 0 to ±40 kPa	from 0.4 to 40 kPa	200 kPa
	3	from 0 to ±250 kPa	from 2.5 to 250 kPa	800 kPa
	4	from -500 to 2000 kPa	from 20 to 2000 kPa	4000 kPa

Code range measurements.
Specified range measurements Maybe be expressed V others units measurements pressure: Pa, MPa, mbar , bar, m water. Art., mm water. Art., mm rt Art., kgf/cm 2 , atm

Metrological characteristics

Name characteristics	Meaning
Range measurements (DI) 1) , kPa – Converter D-3- G – Converter D-3- A – Converter D-3- D	from -100 to 60000 from 0 to 3000 from -500 to 2000
Limits permissible basic given errors To measurement range , %	±0.075 at 1 ≤ TD 2) ≤ 10, ±(0.075·TD 2) ) at TD 2) >10;
Limits permissible additional errors measurements from change temperatures surrounding Wednesday from normal conditions V range workers temperatures, on every 10 ºС	± ((0.024 % from VPI 3) + +0.045 % from DI 3) ) / 2.8)
Limits permissible additional given errors to range measurements from changes voltage nutrition from normal conditions V range workers conditions, on every 1 IN, %	±0.005

Specified range measurements from lower limit measurements (NPI) to top limit measurements ( VPI ), a specific measurement range in accordance with the table “measurement ranges of converters”.
TD – coefficient reconfiguration range measurements, is calculated How attitude maximum top limit measurements To range measurements after reconfiguration V in accordance With table “ranges measurements converters.”
IN case reconfiguration range measurements they’re setting up VPI to reconfigurations, A DI after.

Converters Pressure D – 3