Kobold SWK Manuale utente
Operating Instructions
for
Float Flow Meter / Monitor
Model: SWK
SWK
page 2 SWK 12/03
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 ....................................................................................5
8. Operation / Configuration / Adjustments .......................................................6
8.1. Adjustment of Limit-Value (SWK-1...)..................................................6
8.2. Adjustment of Limit-Value (SWK-2...)..................................................6
9. Technical Information....................................................................................7
10. Maintenance .................................................................................................7
11. Dimensions ...................................................................................................8
12. Declaration of Conformance .........................................................................9
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[email protected]
Internet: www.kobold.com
SWK
SWK 12/03 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 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, 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:
•Float Flow Meter / Monitor Model: SWK
•Operating Instructions
SWK
page 4 SWK 12/03
4. Regulation Use
These units of type SWK are used with a view to measure and monitor the liquid
flow. Only clean, low-viscous and homogeneous liquids may be measured which
do not chemically attack the materials used in the construction of these units. An
attempt to measure high-viscous liquids may lead to considerable measurement
errors.
Large dirt-particles can cause the blockage of float and subsequently turn on
error indications. Also, ferrite particles, which deposit on float(with embedded
magnets), can generate the same effect (we recommend a magnet-filter).
These units are configured in the following manner:
•Housing made of Brass, St. Steel or PVC
•Screwed reed contact N/O with 1m PVC cable (Brass version)
•Screwed reed contact N/O with 2m PVC cable (PVC/VA version)
•Screwed and aligned pointer display (option)
5. Operating Principle
KOBOLD Flow Meter/Monitor of type SWK according to the well known float
principle, however without making use of generally employed extended
measuring tube. Inside a cylindrical lead-pipe a float with aperture moves in the
direction of the flow against the recoiling force of a spring. Within the float, a pair
of magnets is located which trigger a potential-free protective-gas reed contact.
The reed contact is mounted on the exterior of flow-housing and drives a pointer
display. This arrangement allows the unit to be operated without consideration to
mounting position and keeps the installation measures to a minimum. Flow
monitors of type SWK generally find application where small volume flow needs
to be measured in a fail-safe manner.
SWK
SWK 12/03 page 5
6. Mechanical Connection
Before installation:
•Make sure that the permitted max. operating pressure and the operating
temperature of the device are not exceeded.
•Make sure that the electrical supply of the devices corresponds with the
operational data of the device.
•Make sure that no remains of packing material exist within the device.
•The devices should not be installed within an inductive field.
•If possible, it should be checked after the mechanical installation whether the
connection joints/ piping is properly sealed.
Attention! A displacement of switching range occurs if the flow takes place
from top to bottom.
7. Electrical Connection
Attention! Make sure that the voltage values of your system correspond
with the voltage values of the measuring unit, mentioned on type-label.
•Make sure that the supply wires are de-energized.
•The connection of bistable reed contact succeeds through the cable on
contact housing. The potential-free contact closes on rising level above the
adjusted flow value.
SWK
page 6 SWK 12/03
8. Operation / Configuration / Adjustments
The commissioning of these units is prohibited in machines (as long as the
guidelines 89/392/EWG remain enforced), which do not comply with these
guidelines.
The unit is supplied in 'ready for operation' condition. The switching point is
adjusted on the lowest scale value.
8.1. Adjustment of Limit-Value (SWK-1...)
•Loosen the knurled nut on reed contact.
•Adjust the marking on the contact for the desired value on the scale. In this
position the knurled nut should be tightly screwed.
8.2. Adjustment of Limit-Value (SWK-2...)
•Loosen the knurled nut on reed contact.
•Connect a suitable continuity-tester on cable ends.
•Case 1: On an installed unit
•Open the supply line, and let the flow-medium enter slowly, till the pointer
display shows the desired flow value, at which the rising flow should operate
the switch(The value for the decreasing flow lies below due to the hysteresis).
•Case 2: On an upgraded unit the adjustment may be performed by lifting the
float with a suitable tool.
•Switch-housing is dislocated from top to bottom, till the reed contact just
closes (electrical continuity). In this position, align the contact by rotating the
knurled nut.
The unit is now adjusted and ready for operation.
On correct adjustment, the limit-value contact performs bistable action. That
means, even on crossing the adjusted limit-values, the contact remains closed.
Hysteresis
Hysteresis is an indication of difference between switch-on and switch-off points
of a contact. The average hysteresis corresponds to a float-centre movement of
about 3 mm.
SWK
SWK 12/03 page 7
9. Technical Information
Housing/Float: SWK-x1..:Brass (Ni-plated), Ms 58
SWK-x2..: St. Steel, 1.4301
SWK-13..: PVC
Connection: G 1/2 female
Spring: St. Steel 1.4310
Magnets: Ceramic
Stop rings: SWK-x1..: Brass, Ms 58
SWK-x2..: St. Steel, 1.4301
SWK-13..: PVC
Max. temperature: SWK-x1.., SWK-x2: 100 °C
SWK-13..: 60 °C
Max. pressure: SWK-x1.., SWK-x2: 250 bar
SWK-13..: 6 bar
Mounting position: arbitrary
Switching point: bistable reed contact
N/O on increasing flow
Switching power: max. 230 VAC; max. 3 A, max. 60 VA/Watt
Elect. connection: 1 m PVC-cable
Switching hysteresis: 3 mm on scale (mean value)
Repeatability: < 2.5 % (contact)
± 4% measuring value (display)
Weight: ~ 350 g
Protection cat.: IP 65
10. Maintenance
In case the medium to be measured is not contaminated, the device SWK is
almost maintenance-free. With lime or such depositions within inner sections
the device should be cleaned regularly.
Attention! Before the commencement of maintenance work, make sure that
the supply wires are de-energized.
SWK
page 8 SWK 12/03
11. Dimensions
G ½
Typ:
SWK
l/min.
HO
2
51 Approx. 70
9
0
G ½
22,5
22,4
SW2
7
G 1/2
G
1
/
2
1515
90
SWK
SWK 12/03 page 9
12. Declaration of Conformance
We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product:
Float Flow Meter / Monitor Model: SWK...
to which this declaration relates is in conformity with the standards noted below:
DIN EN 61010-1 1994-03
Safety requirements for electrical equipment for measurement, control and
laboratory use
IEC529, DIN VDE 0470-1 1992-11
Protection through housing (IP-Code)
Also, the following EWG guidelines are satisfied:
73/23 EWG
97/23/EG PED
Diagram 8, Pipes, Liquids,
Group 1 dangerous fluids
Module D, mark CE0098
notified body: Germanischer Lloyd Germany
Signed: date: 26.09.03
H. Peters M. Wenzel
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