Kobold DVK-12 Manuel utilisateur

Operating Instructions

for

Calorimetric Flow Meter, Monitor,

Totalizer

Model: DVK

DVK

page 2 DVK K07/0422

1. Contents

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

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

3.Regulation Use ............................................................................................. 3

4.Operating Principle ........................................................................................ 4

5.Instrument Inspection .................................................................................... 4

6.Mechanical Connection ................................................................................. 5

6.1.Check Operating Conditions ................................................................ 5

6.2.Installation ............................................................................................ 5

7.Electrical Connection .................................................................................... 6

7.1.General ................................................................................................ 6

7.2.Compact Version DVK-12... ................................................................. 6

7.3.Separate Version DVK-22.., DVK-42.. ................................................. 7

8.Commissioning.............................................................................................. 7

8.1.General ................................................................................................ 7

8.2.Flow Rate Setting ................................................................................ 8

8.3.Error Connection ................................................................................ 12

9.Technical Information .................................................................................. 12

10.Order Codes ............................................................................................... 14

11.Dimensions ................................................................................................. 15

12.EU Declaration of Conformance ................................................................. 18

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

DVK

DVK K07/0422 page 3

2. Note

Please read these operating instructions before unpacking and putting the unit

into operation. Follow the instructions precisely as described herein.

The instruction manuals on our website www.kobold.com are always for currently

manufactured version of our products. Due to technical changes, the instruction

manuals available online may not always correspond to the product version you

have purchased. If you need an instruction manual that corresponds to the

purchased product version, you can request it from us free of charge by email

([email protected]) in PDF format, specifying the relevant invoice number and

serial number. If you wish, the operating instructions can also be sent to you by

post in paper form against an applicable postage fee.

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

with these operating instructions and in accordance with local regulations

applying to Health & Safety and prevention of accidents.

When used in machines, the measuring unit should be used only when the

machines fulfil the EC-machine guidelines.

as per PED 2014/68/EU

In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the

PED 2014/68/EU no CE mark.

Diagram 6, Pipe, Group 1 dangerous fluids

3. Regulation Use

Any use of the device, which exceeds the manufacturers specification may

invalidate its warranty. Therefore, any resulting damage is not the responsibility of

the manufacturer. The user assumes all risk for such usage.

DVK

page 4 DVK K07/0422

4. Operating Principle

The digital KOBOLD flow meter/monitor model DVK serves to measure and

monitor small and average flows of air in piping and hoses.

The device is absolutely maintenance-free and uses the calorimetric method.

When the operating voltage is applied, a thermistor integrated in the sensor is

heated to a defined value above the medium temperature. When air (or gas)

flows through the sensor, the heat generated in the sensor is absorbed by the

medium. This means that the sensor is cooled down to the medium temperature.

Depending on the velocity and rate of flow, the temperatures are equalized and

the resistance of the sensor is reduced proportionally. The flow velocity can be

determined by measuring the resistance. The medium temperature is measured

by a second sensor.

The resistance values of both sensors are compared by the electronics over a

Wheatstone bridge circuit and an output relay is actuated if the set switching

values have been fallen short or exceeded. The switch state is signalled by two

LED’s (ON: LED on; OUT 1*: green, OUT 2*: red).

The digital KOBOLD flow meter type DVK works with practically no pressure loss.

Typically, the device is available in two different versions (display and sensor as

compact instrument, or display and sensor separated but connected with a cable)

with the necessary screw connections.

* The two outputs OUT 1 and OUT 2 can only be activated by flow measurement per unit of time,

and not by totalising.

5. Instrument Inspection

Instruments are inspected before shipping and sent out in perfect condition.

Should damage to a device be visible, we recommend a thorough inspection of

the delivery packaging. In case of damage, please inform your parcel service /

forwarding agent immediately, since they are responsible for damages during

transit.

Scope of delivery:

The standard delivery includes:

 Calorimetric Flow Meter, Monitor, Totalizer Model: DVK-…

DVK

DVK K07/0422 page 5

6. Mechanical Connection

6.1. Check Operating Conditions

 flow rate

 max. operating pressure

 max. operating temperature

 medium

6.2. Installation

 flow in direction of arrow (position independent)

 avoid pressure and radial tension

 fasten the pipe at up stream and down stream at a distance of 50 mm from the

connections

 check sealing of connections

DVK

page 6 DVK K07/0422

7. Electrical Connection

7.1. General

Attention! Make sure that the voltage values of your system

correspond with the voltage values of the measuring unit.

7.2. Compact Version DVK-12...

 Make sure that the lines are powerless.

 Connect the supply voltage and the output signal to the plug PIN´s as below:

Attention! A wrong connection of plug connection can lead to

damage of the unit’s electronics.

DVK

DVK K07/0422 page 7

7.3. Separate Version DVK-22.., DVK-42..

 Make sure that the supply wires are de-energized.

 Connect the supply voltage and the output signal to the plug PIN´s as given

below.

Attention! A wrong connection of plug connection can lead to

damage of the unit’s electronics.

8. Commissioning

8.1. General

DVK

page 8 DVK K07/0422

8.2. Flow Rate Setting

8.2.1. Setting Procedure

8.2.2. Initial Setting

DVK

DVK K07/0422 page 9

8.2.3. Flow Rate Setting Mode (manual)

DVK

page 10 DVK K07/0422

8.2.4. Flow rate setting mode (auto preset)

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