Kobold SWK Bedienungsanleitung

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.

51 Approx. 70

G ½

22,5

22,4

SW2

G 1/2

1515

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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