Kobold SFL User manual

Operating Instructions
for
Turbine Wheel Flow Meter
Model: SFL

SFL
page 2 SFL K05/0822
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 4
6.Mechanical Connection ................................................................................. 5
7.Electrical Connection .................................................................................... 6
8.Commissioning.............................................................................................. 7
9.Technical Information .................................................................................... 8
10.Pressure-Loss ............................................................................................... 8
11.Order Codes ................................................................................................. 9
12.Maintenance ................................................................................................. 9
13.Dimensions ................................................................................................. 10
14.Disposal ...................................................................................................... 11
15.EU Declaration of Conformance ................................................................. 12
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

SFL
SFL K05/0822 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.
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:
 Turbine Wheel Flow Meter, model: SFL

SFL
page 4 SFL K05/0822
4. Regulation Use
Any use of the SFL that 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.
5. Operating Principle
The model SFL low volume flowmeter is particularly suitable for service in liquids
free from solids. The liquids must be transmissive for infrared light (for example:
water, oil, chemicals). The plastic or stainless steel material combination allows
service in aggressive media.
The flowing medium causes the turbine wheel to rotate. Housing geometry, light-
weight turbine wheel and radial flowing liquid ensure that the rotor floats. A
suspended rotor ensures a long service life. The motion of the turbine wheel is
sensed in a non-contacting manner with infrared diodes and converted to pulses.
This output signal is linear and proportional to the volumetric flow. The flow meter
may be installed in any position.

SFL
SFL K05/0822 page 5
6. Mechanical Connection
 Ensure that the actual flow-volume does not exceed the measuring range of
the unit.
 Ensure that the permitted maximum working pressure and temperature limits
for SFL are not exceeded.
 Make sure that the power supply of the unit is in agreement with the
operational data of the unit.
 Remove all the packing material meant for safe transportation and make sure
that no packing material is located inside the unit.
The unit mounting is position-independent; however, the flow
must always follow the arrow-direction.
 In particular, when flow is from top to bottom, ensure that the flow-chamber is
filled completely by the medium. No additional up/downstream straight-run
piping should be required.
 We advice the use of a prefilter with 20 µm.
 The sealing of the connection-threads should be accomplished by using
Teflon-tape or similar material.
 During installation of the unit, it must be observed that no excessive torsion or
tensile stress is applied to the connection threads. We recommend that the in
and out lines should be mechanically supported at a distance of about 50 mm
away from the connection fittings.
Attention! Exceeding the measuring range (over 20%) can damage
the flowmeter. Please avoid compressed air in the pipe, which can
damage the rotor blades very fast.
 If possible, after the mechanical installation is completed and checked, it
should be tested for leaks in the pipe and connection-threads.

SFL
page 6 SFL K05/0822
7. Electrical Connection
Attention! Make sure that the voltage level of your system is in
agreement with the voltage level imprinted on the nameplate-tag.
 Make sure that the supply wires are de-energized.
 Connect the electrical cable with your power supply cable in the manner
shown below.
 We recommend 0.25 mm² cross-sectional area for the power supply cable.
Attention! Incorrect wiring will lead to damage of the unit’s
electronics.
 After the feed-in voltage is supplied and the signal output is connected, the unit
is ready for operation.
RL = 2.2 k
RS = 50 /V x U
Example:
RS with connection of 12 VDC feed-voltage
RS = 50 /V x 12 V = 600 
Rs
(Clamp 2 ) +
(Unlabelled clamp) S
RL
5 to 24 VDC
0 V
Signal
black
Pulse
(Clamp 1 ) -

SFL
SFL K05/0822 page 7
8. Commissioning
 Please pay close attention to the technical specifications of this flowmeter.
 Check the connecting wires for polarity and voltage.
 Adjust the evaluating electronics for a pulse rate as mentioned in next chapter.
 Check if the pipe and connection-thread joint is properly sealed.
 To avoid excessive pressure conditions, the flow-medium should be introduced
to the unit slowly.
Attention! Pressure spikes generated by abrupt inflow (through
magnetic valves, ball-valves or similar) may cause destruction of the
unit (via water hammer). During normal operation, it must be assured
that the measuring transducer operates only when the chamber is
filled with the medium.
Attention! Large air inclusions in the measuring chamber may lead to
incorrect measurements as well as destruction of bearings.

SFL
page 8 SFL K05/0822
9. Technical Information
Reaction value: approx. 0.08 L/min
Max. medium temp.: -20 to +90 °C
Max. operating pressure: 16 bar (SFL-13)
250 bar (SFL-12)
Measuring accuracy: ±1% f.s.
Repeatability: ± 0.3% of measured value
Interchangeability: ± 2.5% of measured value
Power supply: 5...24 VDC (12...24 mA)
Output signal: pulses approx. 100...2100 Hz
(rectangle, no zero crossing)
K factor (approx.): 6100 pulses/litre (SFL-12...),
5400...6100 pulses/litre (SFL-13...)
Materials: PVDF case and LCP
O-Ring: EPDM (SFL-13) or
stainless steel 1.4305 (case) and LCP
O-Ring: FPM (SFL-12)
Mechanical connection: G 3/8 male (SFL-13) or
G 3/8 female (SFL-12)
Electrical connection: 3- core ribbon cable (app.15 cm)
encapsulated in the case (SFL-13)
Hirschmann connector GDSN207
(SFL-12)
10. Pressure-Loss

SFL
SFL K05/0822 page 9
11. Order Codes
Model Material,
housing/rotor
Connection Meas.
range
l/min
wate
r
Pulsing
rate
tmax p
max
SFL-1220 R10 1.4305/Vectra G 3/8 female 0.5-20 6100
pulses/litre
-20...+90 °C 250 bar
SFL-1320 R10 PVDF/Vectra G 3/8 male 0.5-20 5400...6100
pulses/litre
-20...+90 °C 16 bar
12. Maintenance
Assumed that the medium to be measured is not polluted, the SFL unit is
maintenance-free. To avoid problems, we recommend the mounting of a filter,
such as magnetic filter, model MF-R.

SFL
page 10 SFL K05/0822
13. Dimensions
Model: SFL-1220 R10
Model: SFL-1320 R10
Dimensions: [mm]
Connections: [inch]

SFL
SFL K05/0822 page 11
14. Disposal
Note!
 Avoid environmental damage caused by media-contaminated parts
 Dispose of the device and packaging in an environmentally friendly
manner
 Comply with applicable national and international disposal regulations and
environmental regulations.
Batteries
Batteries containing pollutants are marked with a sign consisting of a crossed-out
garbage can and the chemical symbol (Cd, Hg, Li or Pb) of the heavy metal that
is decisive for the classification as containing pollutants:
Cd1 Hg2 Pb3 Li4
1. „Cd" stands for cadmium
2. „Hg" stands for mercury
3. „Pb" stands for lead
4. „Li" stands for lithium
Electrical and electronic equipment

SFL
page 12 SFL K05/0822
15. EU Declaration of Conformance
We, Kobold Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product:
Turbine Wheel Flow Meter Model: SFL
to which this declaration relates is in conformity with the EU directives noted
below:
1137/2008/EU
2009/137/EG
1025/2012/EU
2011/65/EU RoHS (category 9)
2015/863/EU Delegated Directive (RoHS III)
Hofheim, 25 May 2022
H. Volz M. Wenzel
General Manager Proxy Holder