Kobold DRB Series Manuel utilisateur
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: [email protected]
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 no-
specified, 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 - dimensional
2 x 90°- elbow
P
25 x D 5 x D
2 x 90°- elbow
P
20 x D 5 x D
90°- elbow or
T - pi ece
P
18 x D 5 x D
Extenti on
P
15 x D 5 x D
Reduction
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
DRB
DRB K04/0318 Page 7
7.Electrical connection
7.1.General
Attention! Make sure that the power supply voltage corresponds with the
voltage requirement of the flow meter.
Ensure that power supply is de-energized
Connect the power supply and the output signal to the plug-pins, as shown
below.
We recommend a cross-section of 0.25 mm² for the power supply cable.
Attention! Incorrect wiring may cause permanent damage to the sensor.
DRB
Page 8 DRB K04/0318
7.2.Output Electronics:
Frequency output (..F300; ..F320, ..F340)
1
2
34
+Vs
Signal
Out
n.c.
GND
7.3.Output Electronics:
Analogue output (..L303, ..L342, ..L343, ..L442)
3-wire (..L303, ..L343)
1
2
34
+Vs
Signal
Out
n.c.
GND
+Vs
GND
2-wire (..L342)
1
2
34
S+
S-
n.c.
n.c.
+Vs
GND
DRB
DRB K04/0318 Page 9
2-wire, DIN-plug (..L442)
+Vs
GND
1
2
3
S+
S-
PE n.c.
7.4.Compact Electronics:
(..C30R, ..C30M, ..C34P, ..C34N)
see
Instruction Manual-Supplement
for Compact Electronics
7.5.Evaluation electronics: Pointer indication (..Z300, ..Z340)
1
2
34
+Vs
Signal
Out
n.c.
GND
+Vs
GND
Caution! If the current output is not needed, PIN 4 (signal out) shall be
permanently connected to ground (GND) (short circuit).
DRB
Page 10 DRB K04/0318
7.6.ADI electronics
see
Instruction Manual-Supplement
for ADI-electronics
8.Commissioning – Evaluation Electronics
8.1.General
The Measuring units factory are pre-set and are ready for use after electrical
connections are made.
8.2.Adjustment – Compact electronics
see
Instruction Manual-Supplement
for Compact electronics with Frequency output
8.3.Adjustment – ADI display/controller
see
Instruction Manual-Supplement
for ADI-series display/controller
9.Maintenance
The measuring unit is maintenance-free if the medium to be measured does not
cause deposition of impurities. In order to avoid problems, we recommend
installation of a filter, such as magnet filter, model MFR.
Should cleaning of the sensor becomes inevitable, after opening the sensor the
inner parts may be accessed. Note the direction that the turbine points during
removal and re-install in the same direction. Please be careful to avoid any
damage to the sensor and in particular, to the turbine blades. Repair work
regarding electronics may only be carried out by the supplier. Any access or work
on the electronics voids the warranty.
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