Kobold SMV User manual

Operating Instructions
for
Flow Meter / Monitor
Model: SMV

SMV
page 2 SMV K18/0322
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 5
5.1.SMV ..................................................................................................... 5
5.2.SMV-..21H and SMV-..22H .................................................................. 6
6.Mechanical Connection ................................................................................. 6
7.Electrical Connection .................................................................................... 7
7.1.SMV-1... and SMV-3... with Plug Connection ...................................... 7
7.2.Note for Reed contacts ........................................................................ 7
7.3.Example for Contact Protective Measures ........................................... 7
8.Use in hazardous area .................................................................................. 8
8.1.Statement an apparatus not containing an own potential ignition
source .................................................................................................. 8
8.2.ATEX contact ...F0... (not for SMV-...21H/...22H) ................................ 9
8.3.ATEX reed contact 41R57** ............................................................... 9
9.Operation .................................................................................................... 16
10.Maintenance ............................................................................................... 17
11.Technical Information .................................................................................. 18
12.Order Codes ............................................................................................... 20
13.Recommended Spare Parts ........................................................................ 22
14.Dimensions ................................................................................................. 23
14.1.SMV ................................................................................................... 23
14.2.SMV-...21H/...22H .............................................................................. 24
15.EU Declaration of Conformance (SMV) ...................................................... 27
16.UK Declaration of Conformity (SMV) ........................................................... 28
17.EU Declaration of conformance (Reed contact 41R57**) ............................ 29
18.Statement of conformity reed contact 41R57** ........................................... 30
19.Declaration of the Manufacturer (F0) .......................................................... 34
20.Ex-Type Examination Certificate Magnetic reed switch (F0) ....................... 35
21.IECEx certificate (F0) .................................................................................. 38
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

SMV
SMV K18/0322 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 SMV 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.
Pipe
Table 8
Group 1
dangerous fluids
Table 9
Group 2
no dangerous fluids
SMV, 1/4" - 1" Art. 4, § 3 Art. 4, § 3
SMV, brass, 1 1/4" not deliverable Art. 4, § 3
SMV, stainless steel, 1 1/4" Cat. II Art. 4, § 3
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:
 Flow Meter / Monitor model: SMV

SMV
page 4 SMV K18/0322
4. Regulation Use
Series SMV instruments are used for measuring and monitoring liquids. Only
clean, low viscosity and homogeneous media may be measured, against which
the used materials are resistant. On higher viscous media large measuring errors
may occur particularly. Large dirt particles may lead to blocking of the float and
therefore large measurement and signal errors. Ferrite particles that stick to the
float body (with internal magnet) may also lead to a similar effect. (We
recommend a magnet filter).
The instruments are provided as follows:
Flow Measurement
The actual flow may be taken locally from the pointer indication, which is mounted
at the side of the housing. The scale shows the flow rate directly in litres per
minute of water.
Limit Value Contacts (only model SMV-1.. and SMV-3..)
For the monitoring of the flow rate, the instruments may be fitted with one or two
adjustable limit value contacts.
Type of contact:
 N/O contact (standard)
 Changeover contact (standard)
 N/O contact (cCSAus)
 Changeover contact (cCSAus)
The contact is adjustable over the full measuring range by taking the hysteresis
into consideration.

SMV
SMV K18/0322 page 5
5. Operating Principle
5.1. SMV
The KOBOLD Flow Meters and Switches model SMV-...
are based on the principle of the well-known float-type
flow meters except for the conventional tapering
measuring tube.
These patented instruments are provided instead with a
cylindrical flow tube with conical slots around the
periphery. This eliminates the usual problems of guiding
the cylindrical float within a tapering measuring glass.
The novel design including the provision of an
appropriately dimensioned annular gap of constant
width between the float and the flow tube has enabled
the sensitivity to dirt to be considerably reduced.
The float comprises permanent magnets actuating a
bistable reed contact external to the flow circuit, that is,
the flowing medium is hermetically separated from the
electrical contact. In addition, it is embedded in a height-
adjustable switch housing thus ensuring that the contact
cannot be damaged even by an aggressive atmosphere.
As the medium enters the instrument the float rises. Once its magnetic field
reaches the contact tips of the reed switch the contact closes. As the flow
increases the float rises further until it reaches its stop. This prevents the float
from going beyond the contact range of the magnetic operating tube, that is, the
contact remains closed thus ensuring bistable switching.
With the models SMV-2... and SMV-3... the magnetic field also activates an
external, that is, hermetically separated indicator, as a result of which flows are
measured accurately even at high operating pressures.
The magnetic field and the indicator are designed so as to ensure that the pointer
follows even abrupt changes in flow rate.

SMV
page 6 SMV K18/0322
5.2. SMV-..21H and SMV-..22H
KOBOLD flow meters and -switches series SMV-...21H and SMV-...22H are
equipped with a spring-loaded float which is guided within a cylindrical measuring
pipe and in opposite to the principals known up to now it is hollow. The medium
flows through a circular clearance, which is built by the bore of the float and the
mandrel bar (conical shaft) inside.
The float comprises permanent magnets actuating a bistable reed contact
external to the flow circuit, that is, the flowing medium is hermetically separated
from the electrical contact. In addition, it is embedded in a height-adjustable
switch housing thus ensuring that even an aggressive atmosphere cannot
damage the contact.
As the medium enters the instrument the float rises. Once the magnetic field
reaches the contact tips of the reed switch the contact closes. As the flow
increases the float rises further until it reaches its stop. This prevents the float
from going beyond the contact range of the magnetic operating tube, that is, the
contact remains closed thus ensuring bistable switching.
With the models SMV-2... and SMV-3... the magnetic field also activates an
external, that is, hermetically separated indicator, as a result of which flows are
measured accurately even at high operating pressures.
The magnetic field and the indicator are designed so as to ensure that the pointer
follows even abrupt changes in flow rate.
6. Mechanical Connection
Before installation:
 Make sure that the permitted max. operating pressure
and temperature ratings are not exceeded.
 The installation of the unit takes place vertically in the
pipe. Flow direction is from bottom to top (according
the arrow).
 Remove all the transport safety locks and ensure that
no packing material particles remain inside the unit.
 The sealing of connection joints can be realised
through Teflon tape or similar material.
 The units may not be installed within the influence of
an inductive field.
 If possible, after the mechanical installation, the
sealing of connection joints/pipes should be checked.

SMV
SMV K18/0322 page 7
7. Electrical Connection
7.1. SMV-1... and SMV-3... with Plug Connection
 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 has not been adjusted yet, it would be
appropriate to do so at this point.
(see section 9 Operation)
 Push on the plug to the socket, by using the locking screw.
(see section 9 Operation).
7.2. Note for Reed contacts
Attention! The given electrical specifications of reed switches may
never be exceeded, even for a short time. For higher switching
capacities we recommend the use of contact protection relays 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 finished.
 The unit can now be set in operation.
7.3. Example for Contact Protective Measures
For capacitive and inductive loads (long conductors and relay/protection) we
recommend the following protective schemes.

SMV
page 8 SMV K18/0322
8. Use in hazardous area
8.1. Statement an apparatus not containing an own potential
ignition source

SMV
SMV K18/0322 page 9
8.2. ATEX contact ...F0... (not for SMV-...21H/...22H)
II 2G Ex mb IIC T6 Gb
II 2 D Ex mb IIC T80 °C Db
max. 250 VAC/1.5 A/100 VA
8.3. ATEX reed contact 41R57**
ATEX N/O contact 41R57
II 3G Ex ic IIC T4 Gc
II 3 D Ex ic IIIC T125 °C Dc
-20 °C ≤Ta≤80 °C
max. 250 VAC/DC/1.5 A/100 W/100 VA
ATEX changeover contact 41R57U
II 3G Ex ic IIC T4 Gc
II 3 D Ex ic IIIC T125 °C Dc
-20 °C ≤Ta≤80 °C
max. 250 VAC/DC/1 A/30 W/60 VA

SMV
page 10 SMV K18/0322
Ex-relevant excerpt of the operating instructions of the reed contact
41R57 **
1. Preambel
This excerpt of the operating instructions only represents the ex-relevant aspects.
It is copied into the original operating manual in the same or analogous form;
Textual changes are permitted, the ex-relevant statements remain.
To ensure the function and for your own safety, please read the enclosed
operating instructions carefully before you begin the installation. If you have any
questions, please contact the KOBOLD Messring GmbH, Hofheim. It applies with
the original operating instructions.
The following standard issues were considered in the evaluation of the product:
a) IEC 60079-0:2017 Ed. 7 / EN 60079-0:2018 Explosive atmospheres –
Part 0: Equipment - General requirements
b) IEC 60079-11:2011 Ed. 6 + Corr. 2012 / EN 60079-11:2012 Explosive
atmospheres - Part 11: Equipment protection by intrinsic safety "i"
2. General information on explosion protection
The reed switches work together with various KOBOLD products and serve there
for monitoring. It is available as N/O contact or changeover contact.
The electrical connection is made via a plug - only in intrinsically safe systems.
The reed switch is intended for commercial use and may only be used in
accordance with the specifications in the technical documentation of Kobold and
the information on the nameplate. It is only operated together with certified
products via an intrinsically safe circuit. They comply with the valid standards and
regulations.
The installation regulations (e.g. EN 60079-14) for systems in potentially
explosive atmospheres must be observed.
Further important details can be found in the corresponding EC-type examination
certificate.
Permitted use
• The intrinsically safe reed switch can be used as follows:
• In Zone 2 (Gas-Ex, EPL Gc) in explosion groups IIA, IIB and IIC
• In Zone 22 (Dust-Ex, EPL Dc) in explosion groups IIIA, IIIB and IIIC
• The requirements for simple electrical equipment for use in intrinsically safe
circuits in zones 1/21 are fulfilled.
• The qualification regarding the surface temperature is T4. For all gases, vapors,
mists with an ignition temperature> 135 ° C the equipment is not an ignition
source.
• In the dust Ex area, 125 ° C is the reference temperature for further
consideration regarding the safety distance from the smoldering temperature.
• The ambient temperature range is -20 ° C ≤ Ta ≤ 80 ° C.