Gear Type Flow Meter VC PULSE - KRACHTkracht.eu/uploads/tx_ttproducts/datasheet/VC-PULSE_GB_07-19.pdf · VC sensor resolution volume evaluation) at to standard VC Qnenn [pulse/rev.]

Gear TypeFlow Meter

VC PULSE

2 KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · Phone +49 23 92.935-0 · Fax +49 23 92.935 209 · Email [email protected] · Web www.kracht.eu

Gear Type Flow Meter VC PULSE

Description

C

Product Characteristics

• Selectable high measurement value resolution• Viscosity-independent measurements made in the

frame of the stated ranges• Low pressure drop• Highly-dynamic measurements• High compression strength• Low noise emission• Highly-accurate measurements with outstanding

reproducibility

• Temperature-independent pulses in a largetemperature range

• Great accuracy even at low flow rates in the lowermeasurement range

• Electronics has low susceptibility to disturbance• Easy to install electronics connection• Sensor system in EMC-compatible version

The measuring unit is driven by the flow of fluid basedon the principle of a gear motor. The gears run contactless in the measuring chamber. The low-frictionplain bearings or ball bearings act as the bearing elements. The gear movement is sampled contactlessthrough the sensor installed in the cover. Between thesensor cavity and the measuring chamber there is a

pressure-resistant amagnetic divider. A high-efficiencymagnetic coupling transfers the rotation free from slipto a sensor assembly that is applied to the exterior ofthe unit. The signal is output as a square wave. Thetwo-channel scanning facilitates a higher measuring resolution and detection of the direction of the flowrate.

1 Housing2 Cover3 Gear4 Bearing5 Sensor assembly6 Plug

Typical Applications

Application Medium Version Series

Flow rate measurement oil, brake fluid, skydrol, diesel Spheroidal cast iron(hydraulic test bench) lubricating ball bearings

low viscosity minimal clearances

Ratio control Polyols + Isocyanate, glue, resin, silicon Spheroidal cast iron(2 component plant) poor lubricating tungsten carbide plain bearings

medium viscosity enhanced play

1

4

3KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · Phone +49 23 92.935-0 · Fax +49 23 92.935 209 · Email [email protected] · Web www.kracht.eu

< 0.1 %.

• The accuracy check is a component of every pre-d

Accuracy

L

1.05

1.045

1.04

1.035

1.03

1.025

1.02

+ 0.3 %Vgz = 1.036-- 0.3 %

0 10 20 30 40 50 60 70 80

1

Volu

me

per

pul

se

Flow rate Q

F


Accuracy Characteristics

•

< 0.1 %.


• The accuracy values stated by KRACHT refer tothe pulse volumes [cm3/Imp], i.e., the percentagedeviation applies to each current measurementvalue.

• Repeat accuracy is +/- 0.05% under constantconditions

• The accuracy check is a component of every pre- delivery inspection.

• On request, we will calibrate in the factory and itsresult will be documented in the form of an accuracycharacteristic curve.

• Such an accuracy characteristic curve is shown belowfor a VC 1 Series 1 as an example.

• The accuracy values stated by Kracht shall be confirmedby the DKD (Deutscher Kalibrierdienst).

Repeat accuracy

1.05

1.045

1.04

1.035

1.03

1.025

1.02

+ 0.05%Vgz = 1.036-- 0.05%

0 10 20 30 40 50 60 70 80

Volu

me

per p

ulse

[cm

³]

Flow rate Q [l/min]

1.05

1.045

1.04

1.035

1.03

1.025

1.02

+ 0.05%Vgz = 1.036-- 0.05%

0 10 20 30 40 50 60 70 80

Volu

me

per p

ulse

[cm

³]

Flow rate Q [l/min]

< 0.1 %.


1.05

1.045

1.04

1.035

1.03

1.025

1.02

+ 0.3 %V-- 0.3 %

0 10 20 30 40 50 60 70 80

1

M

Permitted Temperature Ranges

Sealing material FKM EPDM FEP FFKM

Ambient temperature --15 °C … 80 °C --30 °C … 80 °C --30 °C … 80 °C -15 °C … 80 °C

Media temperature ---15 °C … 80 °C --30 °C … 80 °C --30 °C … 80 °C -15 °C … 80 °C


S

M


Characteristics

^

Mounting position optional

Flow direction optional

Connection type Plate mounting / pipe thread

max. operating pressure pmax = 400 bar

Pressure peak p = 480 bar

Max. pressure drop Δpmax = Series 1 16 barSeries 4 16/40 bar (according to version)

Viscosity 1…2.500.000 mm²/s (according to series)

Accuracy (of measurement value) Series 1 +/- 0.3 % at ≥ 20 mm²/sSeries 4 +/- 0.5 % at ≥ 100 mm²/s

Working Characteristics

Resolution PulseSelectable Pulse Resolution (4-fold frequency Multiplication factor

VC sensor resolution volume evaluation) at to standard VCQnenn

[pulse/rev.] [cm³/pulse] [pulse/l] [pulse/l] [Hz] [-]

VC 0.04512 0.001484 673 684 2 694 737 44 912 27

2 500 0.000304 3 289 474 13 157 896 219 298 132

VC 0.2512 0.006699 149 271 597 084 39 806 37

2 500 0.001372 728 863 2 915 452 194 363 179

VC 1512 0.028328 35 301 141 204 47 067 37

2 500 0.005802 172 366 689 464 229 822 179

Sensor resolutions 360 up to 2500 pulses/rev. available upon request.

Series Selection

Nomi- Series Starting Measu- Material Material Bearing Type ofmal point ring housing gears connectionSize range

(l/min) (l/min) (μm)0.04 1 0.004 0.02-4 Spheroidal cast iron Steel Ball bearing Plate mounting 200.2 1 0.01 0.16-16 Spheroidal cast iron Steel Ball bearing Plate mounting 20

1 0.4-80 Spheroidal cast iron Steel Ball bearingPlate mounting

201

40.02

0.3-60 Spheroidal cast iron Steel Low-friction 30plain bearing Pipe connection

Perm.foreignbody

size in themedium



Bestellbeispiel

VC 1 F 4 P O 512 / ..

Product name

ElectronicsO Standard (-30 °C … 80 °C)

Sensor resolution512 Imp/rev.2500 Imp/rev.

Measurement resolution [Imp/l] see working characteristics

Special ID no./version

Connection typeP Plate mountingR Pipe connection

Series1 · 4 (see series selection)

SealF FKME EPDMP FEPK FFKM

Nominal size0.04 · 0.2 · 1

Type Key

Signal Characteristics

Channel IA rising flankB one pulse C falling flankD ON phaseE OFF phaseF Pulse duty factor 1 : 1 ± 15 %

Channel II *

G Channel offset

Electrical Characteristics

Number of measuring channels 2

Supply voltage UB = 11 ... 30 V DCreverse-polarity protection

Pulse amplitude UA 0,8 UB

Pulse form at symmetr. Output signal square wave, pulse duty factor/

channel 1 :1 ± 15 %

Signal output Push-Pull

Pulse offset between both channels* 90° ± 30°

Maximum load ± 30 mA

Current consumption Standard 45 mA

Maximum 150 mA

Frequency max. 200 kHz

Degree of protection IP 65 DIN EN 60529


I

1 : 1 ± 15 %

C

Electrical Connection

E


1 Vcc 11 … 30 V DC2 Channel 13 GND4 Channel 2

2 1

3 4

Electronics: O


P


Pres

sure

dro

p Δ

p [b

ar]

[l/min]

D

Extractsee below

[l/min]

DVC 0.04 (� extract)

80005000

30002000

1000600

300

100

20

5

16

14

12

10

8

6

4

2

00.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Flow rate Q [l/min]

Pres

sure

dro

p Δ

p [b

ar]

1600012000

50008000

30002000

1000600

300

100

205

16

14

12

10

8

6

4

2

00.0 0.2 0.4 0.6 0.8 1.0

Flow rate Q [l/min]

Series 1

VC 0.04

Pressure Drop Parameter: Viscosity (mm2/s)

[l/min]

D

Pres

sure

dro

p Δ

p [b

ar]

Extractsee below

[l/min]

DVC 0.2 (� extract)

1600012000

80005000

30002000

1000600

300

100

205

16

14

12

10

8

6

4

2

00 2 4 6 8 10 12 14 16

Flow rate Q [l/min]

Pres

sure

dro

p Δ

p [b

ar]

1600012000

50008000

3000

1000

600

2000

300

100205

16

14

12

10

8

6

4

2

00 1 2 3 4

Flow rate Q [l/min]

Series 1

VC 0.2


P

KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · Phone +49 23 92.935-0 · Fax +49 23 92.935 209 · Email [email protected] · Web www.kracht.eu8


Pres

sure

dro

p Δ

p [b

ar]

[l/min]

D

Extractsee below

[l/min]

DVC 1 (� extract)

160008000

50003000

20001000

600300

100

20

5

16

14

12

10

8

6

4

2

00 10 20 30 40 50 60 70 80

Flow rate Q [l/min]

Pres

sure

dro

p Δ

p [b

ar]

1600012000

50008000

30002000

300

600

1000

100

205

16

14

12

10

8

6

4

2

00 4 8 12 16 20

Flow rate Q [l/min]

Series 1

VC 1


P



[l/min]

D

Pres

sure

dro

p Δ

p [b

ar]

Extractsee below

[l/min]

D

1

VC 1 (� extract)

1600012000

80005000

30002000

1000600

300

100

20

5

16

14

12

10

8

6

4

2

00 6 12 18 24 30 36 42 48 54 60

Flow rate Q [l/min]

Pres

sure

dro

p Δ

p [b

ar]

1600012000

50008000

30002000

1000

600

300

100205

16

14

12

10

8

6

4

2

00 1 8 12 16 20

Flow rate Q [l/min]

Series 4

VC 1


P

KRACHT GmbH · Gewerbestr. 20 · 58791 Werdohl, Germany · Phone +49 23 92.935-0 · Fax +49 23 92.935 209 · Email [email protected] · Web www.kracht.eu8


Product Portfolio

VC PULSE/GB/07.19

KRACHT GmbH · Gewerbestraße 20 · 58791 Werdohl, Germany · Phone +49 23 92.935-0 · Fax +49 23 92.935 209

Email [email protected] · Web www.kracht.eu

Gear PumpsGear pumps for lubricating oil supply equipment, low pressure filling and feed systems, dosing and mixing systems.

HydraulicsSingle and multistage high pressure gear pumps and hydraulic motors for construction machinery, vehicle-mountedmachines.

Flow MeasurementGear, turbine and screw type flow meters and electronics for volume and flow metering techno logy in hydraulics, processing and laquering technology.

ValvesCetop directional control and proportionalvalves, pressure, quantity and stop valves forpipe and slab construction.

Documents

Gear Type Flow Meter VC PULSE - KRACHTkracht.eu/uploads/tx_ttproducts/datasheet/VC-PULSE_GB_07-19.pdf · VC sensor resolution volume evaluation) at to standard VC Qnenn [pulse/rev.]