Kobold VKM User manual

Operating Instructions
for
Viscosity Compensated
Flow Meter / Monitor
Model: VKM

VKM
page 2 VKM K20/0522
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 5
6.Mechanical Connection ................................................................................. 6
7.Electrical Connection .................................................................................... 6
7.1.Switching Output VKM-1.. and VKM-3.. ............................................... 6
7.2.Example for Contact Protective Measures ........................................... 7
7.3.ADI-Evaluation Electronics VKM-7.. .................................................... 8
7.4.Compact electronic VKM-8... ............................................................... 8
8.Use in hazardous area .................................................................................. 9
8.1.ATEX contact ...F0... (only VKM-1… and VKM-3…) .......................... 11
8.2.ATEX reed contact 41R57** ............................................................. 11
9.Commissioning............................................................................................ 18
9.1.General .............................................................................................. 18
9.2.Switching Output VKM-1.. and VKM-3.. ............................................. 18
9.3.ADI-Electronic Analyser VKM-7.. ....................................................... 19
9.4.Compact electronic VKM-8... ............................................................. 19
10.Maintenance ............................................................................................... 19
11.Technical Information .................................................................................. 20
12.Order Codes ............................................................................................... 22
13.Recommended Spare-Parts ........................................................................ 25
14.Dimensions ................................................................................................. 26
15.EU Declaration of Conformance (VKM) ...................................................... 28
16.UK Declaration of Conformity (VKM) ........................................................... 29
17.EU declaration of conformance (reed contact 41R57**) .............................. 30
18.Statement of conformity reed contact 41R57** ........................................... 31
19.Declaration of the Manufacturer (F0) .......................................................... 35
20.EC-Type Examination Certificate Magnetic reed switch (F0) ...................... 36
21.IECEx certificate (F0) .................................................................................. 39
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

VKM
VKM K20/0522 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 8, Pipe, Group 1 dangerous fluids
3. 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:
 Viscosity Compensated Flow Meter / Monitor model: VKM

VKM
page 4 VKM K20/0522
4. Regulation Use
Any use of the device, which exceeds the manufacturer’s specification, may
invalidate its warranty. Therefore, any resulting damage is not the responsibility of
the manufacturer. The user assumes all risk for such usage.
The models VKM are used for measuring and monitoring of viscous liquid flows
(max. 540 mm2/s). They are suitable for measuring clean and homogeneous fluids
which are compatible with on the instrument materials used.
If using higher viscosity media, large deviations will occur to the measured values.
Large dirt particles may impede the movement of the float and cause false alarm
conditions.
Ferritic particles deposited on the float (with magnet) may lead to the same effects.
The instruments are provided as follows:
Flow measurement (only for Model VKM-2.. and VKM-3..)
The actual flow rate may be read off the magnetically operated pointer indicator
mounted on the instrument. The scale indicates the flow rate directly in litres per
minute.
Limit Value Switches (only for Model VKM-1.. and VKM-3..)
The instrument is fitted with one or two adjustable limit value switches for the
monitoring of flow throughput values.
Type of contacts:
 N/O contact (standard)
 Changeover contact (standard)
 N/O (cCSAus)
 Changeover (cCSAus)

VKM
VKM K20/0522 page 5
5. Operating Principle
A hollow float with a sharp-edged orifice is located within a
cylindrical bored metal housing. The flowing medium raises
the float against the spring force. The position of the float
corresponds to a particular flow rate which may be read
from the needle indicator mounted on the instrument.
Permanent magnets are fitted around the float which
operates reed contact switches external to the flowing
medium chamber.
The operation of the contacts is voltage free and works by
means of magnetic force. i.e.: the contact is hermetically
sealed from the flowing medium.

VKM
page 6 VKM K20/0522
6. Mechanical Connection
Before installation:
 It should be confirmed that the maximum allowed
operating pressures and operating temperatures of the
equipment are not exceeded.
 (see table: standard material combinations).
 The instruments may be mounted in any flow
direction. No recalibration is required when changing
position. The flow must always take place in the
direction of the arrow (see label).
 Remove all transport packing and ascertain that no
packing material is left in the instrument.
 Sealing of the connection threads should be carried
out with Teflon tape or similar.
 The instruments must not be installed within an
induction field.
 if possible, after the mechanical installation, it should
be checked that the connection thread to pipe is fully
sealed (see section 9).
7. Electrical Connection
7.1. Switching Output VKM-1.. and VKM-3..
 Make sure that the supply wires are de-energized.
 Loosen the holding screw of the plug and pull out the cap
from the socket.
 Make connection inside the plug-cap according to the wiring
diagram.
 If the contact switch point has not been adjusted yet, it would
be appropriate to do so at this point.
 (see section 9 Commissioning).
 Push the plug onto the socket, secure by using the locking
screw. (see section 9 Commissioning).

VKM
VKM K20/0522 page 7
Attention! The given electrical specifications of reed switches must
never be exceeded, even for a short time. For higher switching
capacities we recommend the use of contact protection relays (e.g. or
model MSR) or any other contact protection device.
After your designated external units are connected to the limit contact and
adjustment of desired switching points is accomplished, then all the work regarding
connections is completed.
The unit can now be set in operation.
7.2. Example for Contact Protective Measures
For capacitive and inductive loads (long cables and relay/protection) we
recommend the following protective schemes.

VKM
page 8 VKM K20/0522
7.3. ADI-Evaluation Electronics VKM-7..
For connection of the power supply and the output signals please check with the
operating instructions of the corresponding ADI electronic.
Information! The measuring input of the ADI is already factory-
set.
7.4. Compact electronic VKM-8...
Compact electronic: (..C30R, ..C30M)
Compact electronic: (..C34P, .. C34N)

VKM
VKM K20/0522 page 9
8. Use in hazardous area

VKM
page 10 VKM K20/0522