Kobold MIM Series Operating Instructions Manual
Operating Instructions
for
Electromagnetic Flowmeter
Model: MIM
MIM-
We don’t accept warranty and liability claims neither upon this publication nor in
case of improper treatment of the described products.
The document may contain technical inaccuracies and typographical errors. The
content will be revised on a regular basis. These changes will be implemented in
later versions. The described products can be improved and changed at any time
without prior notice.
© Copyright
All rights reserved.
1. Contents
1. Contents ........................................................................................................ 2
2. Note .............................................................................................................. 4
3. Instrument Inspection .................................................................................... 4
4. Regulation Use .............................................................................................. 4
5. Environment .................................................................................................. 5
6. Operating principle ........................................................................................ 5
6.1 General ................................................................................................ 5
6.2 Minimum electrical conductivity / gas bubbles ..................................... 5
6.3 Deposits ............................................................................................... 6
6.4 Measuring electrodes........................................................................... 6
7. Mechanical connection .................................................................................. 7
7.1 Check operating conditions .................................................................. 7
7.2 Installation ............................................................................................ 7
8. Electrical Connection .................................................................................... 9
8.1 General ................................................................................................ 9
8.2 Pin assignment .................................................................................. 10
9. Operation and menu structure .................................................................... 11
9.1 General .............................................................................................. 11
9.2 Measuring mode ................................................................................ 12
9.3 Menu Mode ........................................................................................ 15
10.Device configuration .................................................................................... 16
10.1 Sequence of device parameterization ................................................ 16
10.2 Overview of the menu functions / device parameters ........................ 17
10.3 Display ............................................................................................... 20
10.4 Measurement ..................................................................................... 20
10.5 Outputs .............................................................................................. 23
10.6 User service ....................................................................................... 27
10.7 Service / Factory service .................................................................... 28
10.8 Information ......................................................................................... 28
10.9 Device default settings ....................................................................... 29
11.Technical Information .................................................................................. 30
12.Order Codes ............................................................................................... 31
13.Dimensions ................................................................................................. 32
14.EU Declaration of Conformance .................................................................. 33
page 2 MIM K02/1217
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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
MIM K02/1217 page 3
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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 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:
Electromagnetic Flowmeter model: MIM
Operating Instructions
4. Regulation Use
The MIM flowmeter has been specially developed for the measurement, display
and transmission of both, flow rates and temperature of conductive liquids. The
instrument has a graphic TFT display, rotatable in 90 ° steps and can display flow
rate, temperature, daily volume counter (resettable) and total volume counter in
the units of measurement selected by the operator. A clear menu guides the user
through the parameterization of the device, which largely eliminates the need to
look into the operating instructions.
Any use of the magnetic flowmeter, model: MIM, 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.
page 4 MIM K02/1217
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5. Environment
The MIM device with stainless steel housing and stainless steel electrodes is
weatherproof and conforms to protection class IP67. The meter is designed for
harsh indoor or outdoor environments and complies with Directive 2014/30/EU
(Electromagnetic Compatibility).
6. Operating principle
6.1 General
The new KOBOLD MIM Flowmeter is designed to measure and monitor small
and medium flows of conductive fluids in piping.
The device works on the magnetic-inductive measuring principle. According to
Faraday's law of induction, a voltage is induced in a conductor moving in a
magnetic field. The electrically conductive measuring medium corresponds to the
moving conductor in the process. The voltage induced by the measuring medium
is proportional to the flow rate and thus a measure of the volume throughput.
Prerequisite is a minimum electrical conductivity of the flowing medium. The
induced voltage is fed to a measuring amplifier via two electrodes, which are in
conductive contact with the medium. The volume flow is calculated via the
defined pipe diameter.
The measurement is independent of the medium and its physical properties such
as density, viscosity and temperature. The device can be configured via the
display. There are two outputs available, which can each be configured as alarm,
frequency, pulse, voltage, and current outputs.
The device also provides a dosing function. The dosing function can be activated
in measuring mode via the four buttons. The dosing function controls simple filling
tasks and also measures flow rate and partial amount.
6.2 Minimum electrical conductivity / gas bubbles
For the correct function of the instrument, it is necessary that the flow channel is
always completely filled with medium. From a minimum electrical conductivity of
20 μS / cm, the MIM operates within the specified error limits. The conductivity of
the medium is constantly monitored by the device electronics. If the electronics
detects that the minimum conductivity has fallen below min. value, this is signaled
by displaying the error message 'Empty pipe' and the flow rate reading is set to
'0'. Air bubbles in the flowing medium or media with varying conductivity in the
range of the minimum conductivity can disturb the measuring function and reduce
the measuring accuracy of the MIM. Gases contained in the liquid are also
measured as a volume flow and lead to measurement errors. If necessary, install
appropriate vents in the flow of the unit.
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6.3 Deposits
Minor deposits on the measuring tube generally do not affect the measuring
accuracy unless their conductivity deviates significantly from the liquid. For liquids
that have a tendency to deposit, periodically inspect the meter tube and, if
necessary, clean it.
6.4 Measuring electrodes
The MIM uses electrodes with galvanic tapping. They are in direct contact with
the medium. The standard electrodes are made of stainless steel 1.4404.
page 6 MIM K02/1217
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7. Mechanical connection
7.1 Check operating conditions
flow rate
max. operating pressure
max. operating temperature
In general, MIM is subjected to the same loads as the piping into which it is
installed. The MIM 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.
7.2 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.
Mechanically secure the inlet and outlet pipe at a distance of 50 mm from the
connections.
Avoid valves or large reduction on the inlet section (this increases the
inaccuracy of measurements).
Check the leak tightness of the connections.
While mounting MIM hold the flowmeter from spanner surface (not
from the housing) with the help of spanner.
Take into account the tightening torque.
Nominal size Tightening torque
½“ 22 to 24 Nm
¾“ 28 to 30 Nm
1“ 28 to 30 Nm
MIM K02/1217 page 7
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Inlet and outlet run
Installation from top to bottom avoid these installation locations
Gas bubbles,
particle
Free outlet
page 8 MIM K02/1217
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8. Electrical Connection
8.1 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.
MIM K02/1217 page 9
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8.2 Pin assignment
Configurable output functions:
analogue output 4-20 mA analogue output 4-20 mA
analogue output 0-20 mA analogue output 0-20 mA
analogue output 0-10 V analogue output 0-10 V
alarm output alarm output
pulse output pulse output
frequency output frequency output
Connection example:
OUT2: analogue output 4-20 mA
OUT1: analogue output 0-10 V
Out 1 Out 2
page 10 MIM K02/1217
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