Kobold DPL Bedienungsanleitung

Operating Instruction

for

Small-volume Rotating-vane

Flow Meter

Model: DPL

DPL

Page 2 DPL 07/02

1. Contents

1. Contents ............................................................................. 2

2. Note.................................................................................... 3

3. Warranty............................................................................. 3

4. Application .......................................................................... 3

5. Unit Check-up..................................................................... 3

6. Working Principle................................................................ 4

7. Mechanical Connection ...................................................... 4

8. Electrical Connection.......................................................... 5

9. Commissioning ................................................................... 6

10. Maintenance ....................................................................... 7

11. Technical Data.................................................................... 7

12. Dimensions......................................................................... 8

13. Declaration of Conformance............................................... 9

Manufactured and sold by:

Kobold Messring GmbH

Nordring 22-24

D-65719 Hofheim

Tel.: +49(0)6192-2990

Fax: +49(0)6192-23398

E-Mail: [email protected]

Internet: www.kobold.com

DPL

DPL 07/02 Page 3

2. Note

Please read and take note of these operating instructions before unpacking and

setting the unit for operation, and follow the instructions precisely as described

herein.

The devices are only to be used, maintained and serviced by persons familiar

with these operating instructions and with the prevailing regulation applying to

procedural safety and the prevention of accidents.

3. Warranty

Scope of warranty applies in accordance with our conditions of delivery. Repairs

during the guarantee period require our agreement and instructions, and may

only be carried out through our supplier or one of our approved commission

agents.

4. Application

A trouble-free operation of KOBOLD rotating vane flow meters is ensured only if

all points of consideration described in this manual are well-observed. For

damages, resulting from negligence of these guidelines, the validity of warranty

expires.

5. Unit Check-up

These devices are checked before despatch and sent away in perfect condition.

Should the damage to a device be visible, we recommend an exact inspection of

delivery packing. In case of damage, please inform your postal

service/forwarding agent immediately, since the carrier company is responsible

for any damages during transit.

Scope of delivery

All parts falling under standard scope of delivery are firmly attached with the

device.

DPL

Page 4 DPL 07/02

6. Working Principle

The medium flows through a specially formed flow-chamber and causes thereby

an impeller to rotate. This rotating motion is scanned opto-electronically in a

contactless manner and converted into an asymmetrical frequency signal.

Optionally, a frequency divider with symmetrical output is available. The

generated frequency is proportional to the flow rate. The impeller contains

sapphire-bearings, due to which, high linearity and long life of device are

ensured.

7. Mechanical Connection

·Make sure that the actual flow rate corresponds with the measuring range of

the device. The measuring range (full scale value) can be read off from the

type label.

Note! During measuring range over-stepping (more than 20%), damage to

the axle bearings can occur, which impairs the function of the flow meter.

·Make sure that the permitted max. operating pressure and temperature of the

device DPL are not violated.

·Remove all the transportation-safety locks etc. and ensure, that there exist no

packing-material parts inside the unit.

·These units can be mounted without regard to position. Thereby, the flow must

always take place in the direction of the arrow.

·In particular, attention must be paid to flow from top to bottom, such that the

flow chamber is completely filled with the liquid. Additional inlet and outlet

lengths are not required.

·The sealing of connection screw joints is succeeded through Teflon tape or

similar material.

·During installation of the unit, attention must be paid to see that no high

pressure or tensile loads exert on the connection screw joints. We recommend

to fasten an inlet and outlet pipe mechanically at a distance of approx. 50 mm

from the connection screw joint.

·If possible, after mechanical installation, check whether the sealing of

connection-joints/piping is adequate.

DPL

DPL 07/02 Page 5

8. Electrical Connection

Note! Ensure that the voltage levels of your supply system are in agreement

with that of flow meter.

·Make sure that the electric supply lines are not active.

·Join the connection cable with your power supply cable, according to the

connection plan shown below.

·We recommend a cross-sectional area of 0.25 mm² for the power supply

cable.

Warning! A false connection of cable can lead to destruction of unit's

electronics section

Version “O” Connection plan

Feed voltage receiver

Feed current receiver

Signal amplitude High

Signal amplitude Low

Reverse voltage Sender

Feed current Sender

Output dissipation (power)

4.5 ... 16 V

typ. 7 mA

approx. oper. voltage

0.2 V

3.0 V max.

30 mA ... 50 mA

2.5 mW max.

Version “K” Connection plan Ub Rv

Feed voltage

Feed current

Signal amplitude

High

Signal amplitude Low

Output dissipation

see column Ub

40 ... 50 mA

approx. oper.

voltage

max. 0.2 V

2.5 mW max.

Yellow

White

Green

5 V

8 V

12 V

15 V

220W/ 0.25 W

430W/ 0.25 W

680W/ 0.25 W

910W/ 0.25 W

Version “F” Connection plan Ub Rv

Feed voltage see column Ub 8 V ...

Feed current 40 ... 50 mA 12 V 180 W/ 0.25 W

Signal amplitude High ca. 8 V 15 V 270 W/ 0.25 W

Signal amplitude Low max. 0.2 V 24 V 680 W/ 0.25 W

Output dissipation 2.5 mW max.

Model: DPL-FS... Connection plan

Feed voltage 16 ... 28 V DC

Feed current 25 ... 30 mA

Signal amplitude High Ub - 0.8 V

Signal amplitude Low max. 0.5 V

Output dissipation 2.5 mW max.

receiver

Transmitter

Controller

White

Green

Brown

16-28 VDC

Signal

·After making connections of feed voltage and signal output, the unit is ready

for operation.

DPL

Page 6 DPL 07/02

9. Commissioning

·Please pay attention to the technical data of the flow meter.

·Pick a frequency value of flow meter from the following table:

Model Meas.

range

Water

(l/min)

approx.

Pressure-loss

at max. value

(bar)

approx.

Frequency at

max. value

(Hz)

DPL-005

DPL-018

DPL-060

DPL-120

DPL-250

0.025-0.5

0.05 -1.8

0.2-6

0.4-12

1-25

0.77

0.70

1.0

1.3

272

471

528

265

399

·Adjust your evaluation electronics to the pulse-rate indicated above. For

devices with frequency divider electronics, pulse-rate must by divided by the

factor indicated on the cable tag.

·In order to avoid pressure peaks, the flow medium should flow slowly into the

device.

Frequency Divider 2 4 8

Warning! Pressure peaks generated by sudden flow, caused by single

solenoid valves, ball valves or the like, can lead to the destruction of the

device (water hammer!). In the operating condition, it is to be made certain

that the sensor is constantly filled with the medium.

Note! Larger bubbles in the measuring chamber can lead to measurement

errors or destruction of bearings.

DPL

DPL 07/02 Page 7

10. Maintenance

In case, the medium to be measured is not contaminated, the unit DPL is

maintenance-free. In order to avoid problems, we recommend installation of a

filter such as Magnet-filter, Model MF-R.

Should the cleaning of a device be deemed necessary, it can be done easily by

removing housing cover and making the interior of housing accessible.

Maintenance/repair work on device's electronics may only be carried out by the

supplier, since otherwise, the warranty shall expire.

11. Technical Data

11.1. General

Max. oper. pressure: 10 bar

Temperature: - 40°C ... + 70°C

Linearity: ± 1 %

Protection Cat.: IP 65

11.2. Materials

Housing: Polypropylene

Vane: Polypropylene

Axle/Bearing: Sapphire

Vane inlet: Polysulfone

Sealing: Perbunane,

Option: Viton, EPDM

DPL

Page 8 DPL 07/02

12. Dimensions

G 1/2

SW 24

1313

Cabel 4,5

DPL

DPL 07/02 Page 9

13. Declaration of Conformance

We, KOBOLD-Messring GmbH, Hofheim-Ts, Germany, declare under our sole

responsibility that the product:

Rotating-vane Flow Meter DPL-FS...*

to which this declaration relates is in conformity with the standards noted below:

EN 50082-2 Electromagnetic Compatibility - Generic immunity

standard (edition 2/1996)

a) Electromagnetic compatibility, Electrostatic discharge

immunity test (EN 61000-4-2, ESD, Level B)

b) Electromagnetic compatibility, Electrical fast

transient/burstimmunity test (EN 61000-4-4, BURST, Level B)

Also the following EWG guidlines are fulfilled:

89/336/EWG

Signed: date: 19.10.00

H. Peters M. Wenzel

* The models DPL-O, DPL-K and DPL-F have no CE-conformity sign.

(OEM versions)

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