Kobold MIK Operating Manual
Operating Instructions
for
Compact Magnetic-Inductive
Flow Meter
Model: MIK
MIK
1. Contents
1. Contents ........................................................................................................ 2
2. Note .............................................................................................................. 3
3. Instrument Inspection .................................................................................... 3
4. Regulation Use .............................................................................................. 3
5. Operating Principle ........................................................................................ 4
5.1 General ................................................................................................ 4
5.2 Minimum electrical conductivity / contained gases .............................. 4
5.3 Deposits ............................................................................................... 5
5.4 Measuring electrodes........................................................................... 5
6. Mechanical Connection ................................................................................. 6
6.1 Check operating conditions .................................................................. 6
6.2 Installation ............................................................................................ 6
7. Electrical Connection .................................................................................... 8
7.1 General ................................................................................................ 8
7.2 MIK-...S300 .......................................................................................... 8
7.3 MIK-...S30D ......................................................................................... 8
7.4 MIK-...F300; MIK-...L3x3 ...................................................................... 9
7.5 MIK-...L443 .......................................................................................... 9
7.6 MIK-...C30.. .......................................................................................... 9
7.7 MIK-...C34.. .......................................................................................... 9
7.8 MIK-...Ex4R, MIK-...Gx4R .................................................................. 10
8. Operation .................................................................................................... 11
8.1 Switch point setting MIK-...S300, MIK-…S30D .................................. 11
8.2 Counter electronics MIK-…Ex4R ....................................................... 11
8.3 Dosing electronics MIK-…Gx4R ........................................................ 11
9. Adjustments – Compact Electronics MIK-...C3.. ......................................... 12
9.1 Button function ................................................................................... 12
9.2 Settings .............................................................................................. 12
9.3 Value setting ...................................................................................... 13
9.4 Set-up mode ...................................................................................... 14
9.5 Main menu items ............................................................................... 16
10.Maintenance ............................................................................................... 19
11.Technical Information .................................................................................. 20
12.Order Codes ............................................................................................... 23
13.Dimensions ................................................................................................. 24
14.Declaration of Conformance ....................................................................... 27
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
page 2 MIK K07/0614
MIK
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 EWG-machine guidelines.
as per PED 97/23/EG
In acc. with Article 3 Paragraph (3), "Sound Engineering Practice", of the
PED 97/23/EC no CE mark.
Diagram 8, Pipelines, 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:
Compact Magnetic-Inductive Flow Meter model: MIK
Operating Instructions
4. Regulation Use
Any use of the Compact Magnetic-Inductive Flow Meter, model: MIK, which
exceeds the manufacturer’s specifications, may invalidate its warranty. Therefore,
any resulting damage is not the responsibility of the manufacturer. The user
assumes all risk for such usage.
MIK K07/0614 page 3
MIK
5. Operating Principle
5.1 General
The new KOBOLD flow meter Type MIK is used for measuring and monitoring
smaller and medium-sized flow of conductivity liquids in pipes. The device
operates according to the electromagnetic measuring method. According to
Faraday’s Law of electromagnetic induction a voltage is induced in a conductor
moving through a magnetic field. The electroconductive measuring medium acts
as the moved conductor. The voltage induced in the measuring medium is
proportional to the flow velocity and is therefore a value for the volumetric flow.
The flowing media must have a minimum conductivity. The induced voltage is
picked up by two sensing electrodes which are in contact with the measuring
medium and sent to the measuring amplifier. The flow rate will be calculated
based on the cross sectional area of the pipe.
The measurement is not depending on the process liquid and its material
properties such as density, viscosity and temperature.
The device may be equipped with a switch, frequency or analogue output.
Moreover, there is a compact electronic system to be selected from, which
contains a digital display, a switch and an analogue output.
The device series is completed by an optionally obtainable dosing and counter
electronic system. The counter electronic system shows the current flow rate on
the first line of the display and shows the partial or overall volume on the second
line. A dosing electronic system controls simple filling duties and also measures
the flow rate, overall volume and filling volume. The analogue output and two
relay outputs can be utilised for the further processing of signals.
5.2 Minimum electrical conductivity / contained gases
It is necessary for the correct function of the device that the current canal is
always filled completely with medium.
As of a minimum electrical conductivity of 30 µS/cm the MIK works within the
guaranteed margins of error. The conductivity of the medium is continuously
monitored by the device’s electronic system. If the electronic system registers
that the conductivity has under-run minimum, the output signal is suppressed for
2 seconds, after which the value for zero flow is output.
Air bubbles in the flowing medium or media with changing conductivity in the
range of the minimum conductivity can interfere with the measuring function and
reduce the MIK’s measuring accuracy.
The gases contained in the fluid are included in the volume flow measurements
and consequently cause erroneous measurements. If necessary, suitable vents
should be fitted upstream in the device.
page 4 MIK K07/0614
MIK
5.3 Deposits
Minor deposits on the measuring tube do not compromise the accuracy of
measurement in general, as long as their conductivity does not seriously deviate
from that of the fluid. In the case of fluids that have a tendency to deposit
sediment, the measuring tube should be checked at regular intervals and cleaned
if necessary.
5.4 Measuring electrodes
The electrodes used with the MIK have a galvanic pick-off. They are in direct
contact with the fluid and are fitted opposite one another, and insulated from the
measuring tube. The standard electrodes are made of 1.4404 stainless steel or
Hastelloy C4.
MIK K07/0614 page 5
MIK
6. Mechanical Connection
6.1 Check operating conditions
flow rate
max. operating pressure
max. operating temperature
In general the MIK is subjected to the same loads as the piping into which it is
installed. The MIK should therefore be kept away from extreme loads, such as
pressure surges with strong, dynamic pipe movements, vibrations in the proximity
of centrifugal pumps, high temperature media, flooding etc.
6.2 Installation
Remove all packing materials and transport retainers and ensure that no such
materials remain in the device.
It can be installed in vertical, horizontal or rising pipes. Flow in direction of the
arrow.
Avoid pressure and tensile load.
Mounting the inlet and outlet pipe in a distance of 50 mm from the connections.
Attention! The sensor housing made of PPS and PVDF is not
allowed to be subjected to a torsional stress during installation.
The connecting of the respective connection thread with the
pipeline should be adapted to the material used, over tightening
the connection will damage the sensor housing, a loose
tightening may result in loosening the connection.
Avoid valves or large reduction on the inlet section (this increases the
inaccuracy of measurements).
Check the leak tightness of the connections.
page 6 MIK K07/0614
MIK
in- and outlet
mounting top down avoid this mounting position
MIK K07/0614 page 7
MIK
7. Electrical Connection
7.1 General
Attention! Make sure that the voltage values of your system
correspond with the voltage values of the measuring unit.
Make sure that the supply wires are de-energised.
Connect the supply voltage and the output signal to the plug PIN’s as stated
below.
We recommend the use of wires with cross sectional area of min. 0,25 mm².
Attention! The measuring electrodes are galvanically connected
with the reference potential of the supply voltage and the signal
output.
7.2 MIK-...S300
Output
N/O
2
5
GND
3
7.3 MIK-...S30D
Output
N/C
1
Common
4
12
+Vs
Output
Output
N/C
+Vs
GND
3
page 8 MIK K07/0614
4
Output
N/O
MIK
1
7.4 MIK-...F300; MIK-...L3x3
Connection example MIK-...L3x3
+Vs
n.c.
2
GND
3
7.5 MIK-...L443
1
4
+Vs
GND
+Vs
Signal
Out
2
n.c.
GND
Signal
Out
GND
3
+Vs
GND
1
4
+Vs
Signal
Out
7.6 MIK-...C30..
Switch
Out 2
GND
MIK K07/0614 page 9
2
5
3
4
1
+Vs
GND
Switch
Out 1
7.7 MIK-...C34..
0(4)-20 mA
2
5
GND
3
1
+Vs
GND
Switch out
4
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