Kobold DRB Series Operating Instruction
Operating Instruction
for
Turbine-wheel Flow Meter
Model: DRB-...
DRB
Page 2 DRB K04/0318
1. Contents
1. Contents ........................................................................................................ 2
2. Note .............................................................................................................. 3
3. Instrument Inspection .................................................................................... 3
4. Regulation Use .............................................................................................. 3
5. Operating Principle ........................................................................................ 4
6. Mechanical Connection ................................................................................. 4
7. Electrical connection ..................................................................................... 7
8. Commissioning – Evaluation Electronics .................................................... 10
9. Maintenance ............................................................................................... 10
10.Technical Data ............................................................................................ 11
11.Order Details ............................................................................................... 14
12.Dimensions (mm) ........................................................................................ 15
13.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: info.de@kobold.com
Internet: www.kobold.com
DRB
DRB K04/0318 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 with the prevailing regulation applying to
safety and the prevention of accidents.
When used in machines, the measuring unit should be used only then when the
machines fulfil the EC-machine guide lines.
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 2 dangerous fluids
3. Instrument Inspection
These devices are checked before shipping and sent out in perfect condition.
Should 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:
Turbine-wheel Flow Meter, Model: DRB
Operating Instructions
4. Regulation Use
The “turbine-wheel flow meter, model DRB“, is to be installed only in specified
applications. Any usage which exceeds the specifications is considered to be nospecified, and would also invalidate the warranty. 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.
DRB
Page 4 DRB K04/0318
5. Operating Principle
The KOBOLD flow meter model DRB is used for measuring and monitoring
liquids. The device works according the well-known paddle wheel principle.
The four vane paddle wheel is retained radially in a high quality sapphire bearing.
The sensor is supplied ready-to-install with pipe fittings or with weld-on sleeves.
The paddle wheel is set in motion by the flowing medium. Magnets are
embedded hermetically sealed in the ends of the blades. The magnets generate
electrical pulses in a Hall-effect sensor mounted outside the flow area. Various
electronics units can be used to display and monitor the volumetric flow.
6. Mechanical Connection
6.1. Examine operating conditions:
Flow volume
Max. operating pressure
Max. operating temperature
Ensure that they are all within the limits of the device
Attention! Over-ranging may cause bearing damage and considerable
measurement errors.
6.2. Installation
Flow in the direction of the pointing arrow (position independent)
Pressure and tensile loading should be avoided
The inlet and outlet should be secured at a distance of 50 mm mechanically
from the connection.
Check the sealing of connections/joints
DRB
DRB K04/0318 Page 5
6.3. Inlet and outlet path straight piping requirements
P
50 x D 5 x D
Control valve
P
40 x D
5 x D
3 - dimensi onal
2 x 90°- el bow
P
25 x D 5 x D
2 x 90°- elbow
P
20 x D 5 x D
90°- el bow or
T - pi ece
P
18 x D 5 x D
Ext ent i on
P
15 x D 5 x D
Reducti on
DRB
Page 6 DRB K04/0318
Version with weld-on mounting adapter
Weld the mounting adapter in the piping according to the sketch given below.
Position and weld-in the mounting adapter according to the nominal diameter
suitable marking. The marking on the adapter must be in line with the outer
diameter of the pipe. Also pay attention to the later position of the rotating vane
(shaft of the vane shifted by 90° to the direction of flow).
for DN 40
for DN 80
for DN 50
Nominal Size H
DN 25 30
DN 40 44
DN 50 46
DN 80 63
51
H
Nominal diameter
A
dapter
Ø
±
0,3
Loading...