Kobold DRH Series User manual

Operating Instructions
for
Rotating Vane Flow Meter
Model: DRH-...

DRH
page 2 DRH K12/0923
1. Contents
1. Contents ............................................................................. 2
2. Note .................................................................................... 3
3. Instrument Inspection ......................................................... 3
4. Regulation Use ................................................................... 4
5. Operating Principle ............................................................. 4
6. Mechanical Connection ...................................................... 5
6.1. Check service conditions: ............................................. 5
6.2. Installation .................................................................... 5
7. Electrical Connection .......................................................... 6
7.1. General ........................................................................ 6
7.2. Output electronics: Frequency output (..F300;..F320,
..F340) ......................................................................... 6
7.3. Output electronics: Analogue output (..L303, ..L342,
..L343, ..L442) .............................................................. 7
7.4. Cable outlet with M12x1 angle plug electronic options
F3x and L3x ................................................................. 8
7.5. Compact electronics: (..C30R, ..C30M, ..C34P,
..C34N) ........................................................................ 9
8. Commissioning – Output electronics ................................ 10
8.1. General ...................................................................... 10
8.2. Setting - compact electronics ..................................... 10
9. Maintenance ..................................................................... 11
10. Technical Information ....................................................... 12
11. Order Codes ..................................................................... 12
12. Dimensions ....................................................................... 12
13. Disposal ............................................................................ 13
14. EU Declaration of Conformance ....................................... 14
15. UK Declaration of Conformity ........................................... 15
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim/Germany
Tel.: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: www.kobold.com

DRH
DRH K12/0923 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.
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com
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 machinery, the flow meter should only be placed in operation if the
machine in use complies with the EEC machinery guidelines.
According to PED guideline 2014/68/EU
No CE marking, see Article 4, Section 3 "Sound engineering practice",
Guideline 2014/68/EU
Diagram 8, Piping systems, Group 1 Hazardous fluids
3. Instrument Inspection
Instruments are inspected before shipping and sent away 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:
 Rotating Vane Flow Meter model: DRH-...

DRH
page 4 DRH K12/0923
4. Regulation Use
Any use of the DRH which exceeds the manufactures specification may invalidate
its warranty. Therefore, any resulting damage is not the responsibility of the
manufacturer. The user assumes all risk for such usage.
5. Operating Principle
KOBOLD Rotating Vane Flow Meters series DRH are used for measuring and
monitoring low viscous liquids.
Series DRH flow meters are working according the well-known rotating vane
principle. A magnet fitted in the vane and hermetically sealed from the medium
transfers non-contacting the rotary motion 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. A series-connected electronics unit converts the signal to
an analogue output, limit contacts or display.
These devices can be adapted to prevailing plant conditions with the 360°
rotatable screw connections.

DRH
DRH K12/0923 page 5
6. Mechanical Connection
6.1. Check service conditions:
 Flow rate
 Maximum operating pressures
 Maximum operating temperature
Attention! Overrange can cause damage to bearings and cause
major measuring errors.
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.
 Check that flow is in the direction of the arrow on the front of the unit, and that
the face of the unit is aligned in the vertical plane (axle in horizontal plane)
 Avoid pressure and tensile loads
Mechanically secure the inlet and outlet lines 50 mm from the connection
 Check connections for leaks.

DRH
page 6 DRH K12/0923
7. Electrical Connection
7.1. General
Attention! Make sure that the voltages in your plant correspond
with the flow meter voltages.
 Make sure that all electrical supply lines are de-energised.
 Connect supply voltage and output signal to the plug connector pins as shown
below.
 We recommend a power supply cable with diameter 0.25 mm².
Attention! The instrument electronics may be damaged if the cable
connections are assigned incorrectly.
7.2. Output electronics: Frequency output (..F300;..F320, ..F340)
1
2
34
+Vs
Signal
Out
n.c.
GND

DRH
DRH K12/0923 page 7
7.3. Output electronics: Analogue output (..L303, ..L342, ..L343,
..L442)
3-wire (..L303, ..L343)
2-wire (..L342)
1
2
34
S+
S-
n.c.
n.c.
+Vs
GND
1
2
34
+Vs
Signal
Out
n.c.
GND
+Vs
GND

DRH
page 8 DRH K12/0923
2-wire, DIN plug connector (..L442)
7.4. Cable outlet with M12x1 angle plug electronic options F3x
and L3x
When using a pre-assembled M12x1 connection cable with angled plug, the
cable outlet is always aligned opposite to the flow direction.
+Vs
GND
1
2
3
S+
S-
PE n.c.

DRH
DRH K12/0923 page 9
7.5. Compact electronics: (..C30R, ..C30M, ..C34P, ..C34N)
7.5.1. General
Attention! Make sure that the voltages in your plant correspond
with the flow meter voltages.
 Make sure that all electrical supply lines are de-energised.
 Connect supply voltage and output signal to the plug connector pins as shown
below.
 We recommend a power supply cable with diameter 0.25 mm².
Attention! The instrument electronics may be damaged if the cable
connections are assigned incorrectly.
7.5.2. Compact electronics: (..C30R, ..C30M)
7.5.3. Compact electronics: (..C34P, ..C34N)
The clamps 3 and 5 are short-circuited and can therefore be used optional for the
output signal or power supply.

DRH
page 10 DRH K12/0923
8. Commissioning – Output electronics
8.1. General
The measuring instruments are preset and are ready for operation after electrical
connection.
8.2. Setting - compact electronics
See
Operating instructions supplement
for compact electronics with frequency output