Kobold DRG Series, DRG-F Series, DRZ-**Z Series, DRG-**L442, DRG***L3 Series Operating Instructions Manual

Operating Instruction

for

Rotating Vane Flow Meter

Model: DRG-...

DRG

Page 2 DRG K02/0316

1. Contents

1.

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

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

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

4. Operating Principle ........................................................................................ 3

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

6. Mechanical Connection ................................................................................. 4

7. Electrical Connection .................................................................................... 5

8. Commissioning – Evaluation Electronics ...................................................... 8

9. Technical Information .................................................................................... 8

10.Order Details ............................................................................................... 10

11.Maintenance ............................................................................................... 11

12.Dimensions ................................................................................................. 11

13.EU Declaration of Conformance .................................................................. 14

Manufactured and sold by:

Kobold Messring GmbH

Nordring 22-24

D-65719 Hofheim

Tel.: [phone]

Fax: [phone]

E-Mail: [e-mail]

Internet: www.kobold.com

DRG

DRG K02/0316 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 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 EG-machine guidelines.

PED 2014/68/EU

In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the
PED 2014/68/EU no CE mark.
Table 8, Pipe, Group 1 dangerous fluids

3. Regulation Use

The Model DRG-..., rotating vane flow meter is to be installed only in applications
that are within the specified operating limits. An use which exceeds the
specifications is prohibited. Any damages resulting therefrom are not the
responsibility of the manufacturer. The user assumes all risk for such usage. The
application specifications include the installation, start-up and service
requirements specified by the manufacturer.

4. Operating Principle

KOBOLD rotating vane flow meters series DRG are used for measuring and
monitoring low viscosity liquids. Series DRG flow meters are working according
the well known rotating vane principle. A magnet fitted in the vane and
hermetically sealed from the medium transfers the rotary motion of the vane to a
Hall-effect sensor mounted in the housing. The sensor converts the rotary motion
which is proportional to the flow to a frequency signal. The frequency is therefore
proportional to flowrate. A series-connected electronics unit converts the signal to
an analogue output, limit contacts or display.

DRG

Page 4 DRG K02/0316

5. Instrument Inspection

These devices are checked before dispatch and sent away in perfect condition.
Should the damage to a device be visible, we recommend a thorough inspection
of the delivery packing. In case of damage, please inform your parcel service/
forwarding agent immediately, since they are responsible for damages during
transit.

Scope of delivery:

 Rotating Vane Flow Meter model: DRG
 Operating Instructions

6. Mechanical Connection

6.1. Operational conditions check up:

 Max. flowrate
 Max. operational pressure
 Max. operational temperature

Attention! In case, specified range is over-violated, bearings may get
damaged and considerable measurement errors may result.

6.2. Installation

 It must be ensured that the instrument housing is continuously filled with the

flow medium, especially for flows from top to bottom. No straight lengths are
necessary at inlet and outlet connections.

 Flow in the direction of arrow pointer (position independent), front side of the

unit must stand in a vertical plane.

 Pressure and tensile loading should be avoided.

Inlet and outlet (piping) should be braced at a distance of 50 mm from the
connection location.

 Sealing of connections should be checked.

DRG

DRG K02/0316 Page 5

7. Electrical Connection

7.1. General

Attention! Please ensure that the voltage levels of your system are
in agreement with that of the flow meter.

 Make sure that the electric supply lines are de-energized.

 Connect the power supply and output signal on the plug-pins as shown below.

 We recommend a cross-sectional area of 0.25 mm² of power supply cable.

Attention! A wrong plug-connection can lead to destruction of
unit’s electronics.

7.2. Evaluation electronics: Frequency output (..F300; ..F320,
..F340)

1

2

3

4

+Vs

Signal
Out

n.c.

GND