Kobold KAL Operating Instruction

Operating Instruction

for

Calorimetric Flow Monitoring Device

Model: KAL

KAL

Page 2 KAL 07/04

1. Contents

1. Contents........................................................................................................2

2. Note ..............................................................................................................3

3. Instrument Inspection....................................................................................3

4. Regulated Use ..............................................................................................4

5. Operating Principle .......................................................................................5

6. Mechanical Connection.................................................................................5

7. Electrical Connection ....................................................................................6

8. Limiting Contacts ..........................................................................................6

9. Alignment / Balancing ...................................................................................7

10. Commissioning ...........................................................................................10

11. Maintenance ...............................................................................................10

12. Fault Signalling ...........................................................................................11

13. Technical Information..................................................................................11

14. Order Codes ...............................................................................................12

15. Dimensions .................................................................................................13

16. Declaration of Conformance .......................................................................14

Manufactured and sold by:

Kobold Messring GmbH

Nordring 22-24

D-65719 Hofheim

Tel.: [phone]

Fax: [phone]

E-Mail: [e-mail]

Internet: www.kobold.com

KAL

KAL 07/04 Page 3

2. Note

Please read and take note of these operating instructions before unpacking and
setting the unit for operation, and 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 with the prevailing regulation applying to
procedural safety and the prevention of accidents.

By usage in machines, the measuring unit should be used only then when the
machines fulfil the EWG-machine guide lines.

PED 97/23/EG
for KAL-11.. and KAL-12..

In acc. with Article 3 Paragraph (3), "Sound Engineering Practice", of the
PED 97/23/EC no CE mark.
Table 8, Pipe, Group 1 dangerous fluids

3. Instrument Inspection

These devices are checked before dispatch and sent away in perfect condition.
Should the damage to a device be visible, we recommend a thorough inspection
of the delivery packing. In case of damage, please inform your parcel service/
forwarding agent immediately, since they are responsible for damages during
transit.

Scope of delivery:

• probe with 2 m PVC as standard

• Electronic setting system

KAL

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4. Regulated Use

The KAL is to be installed only in the specified applications. Every usage which
exceeds the specifications is considered to be non-specified. Any damages
resulting therefrom are not the responsibility of the manufacturer. The user
assumes all risk for such usage. The application specifications include the
installation, start-up and service requirements specified by the manufacturer.

Devices from the KAL model series are used for the monitoring of liquid flow.

Limiting relay

The devices are equipped with limiting relays for monitoring the flow speed of
liquids (KAL-E1...-E3).

Trend display

An LED bar display shows the current flow value and the set switch point via a
flashing LED (only on models KAL-E2... and KAL-E3...).

Probes

Probes are available in two options: as a screw-type or in-line version.

Model KAL devices are always made up of two structural components

• Probe

• Electronic setting system

The devices may only be used for liquids to which the probe housing materials
are resistant. With proper installation and maintenance, the probes display no
sensitivity to soiling and cause practically no pressure loss.

Materials

KAL-11... Brass material
KAL-12..., KAL-23..., KAL-53... St. steel material 1.4301
KAL-24..., KAL-54... St. steel material 1.4571

Setting ranges in relation to nominal tube diameter

ND (mm) Range (l/min) water ND (mm) Range (l/min.) water

8 0,12 - 6,0 40 3,0 - 150
10 0,19 - 9,4 50 4,7 - 235
15 0,42 - 21,8 60 6,8 - 340
20 0,75 - 37,7 80 12,0 - 603
25 1,18 - 59,0 100 18,8 - 942
30 1,7 - 84,8 150 42,4 - 2120

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Attention! For the measuring ranges gives the flow speed was
converted to the nominal tube diameter. It should be noted in line
with this that in the tube towards the wall section the flow speed
approaches 0. Depending on nominal tube diameter, screw depth of
the probe and flow profile, occasional deviations, some of them
considerable, may result.

5. Operating Principle

The all-metal design electronic flow monitor device functions according to proven
calorimetric principles. The measuring probe is heated up a few degrees from the
inside outwards in relation to the flow medium which it is penetrating. If the
medium is flowing then the heat produced in the probe is carried away by the
medium, i.e. the probe becomes cooler. This cooling represents a measuring of
the flow speed.
The electronic setting system compares the desired flow speed with the actual
speed and activates an output relay when the desired value is not reached. By
the use of a micro-controller, simple calibrations is made possible. In this way
optimum temperature compensation can be achieved.

6. Mechanical Connection

Before installation:

• Ensure that the actual flow quantity corresponds to the setting range of the

device (i.e. to the flow speed).

• Ensure that the permitted maximum operating pressure and temperatures for

the device are not being exceeded. (See point 13 Technical Information)

Installation:

Mount the sensor in the pipe (KAL-1...)- in a sleeve welded to the pipe (KAL-2...).

Fitting position:

The function of the sensor is not dependent on
their fitting position, provided that the pipe is
completely filled with flow medium. The place
where the sensor are fitted must be free from
turbulence in the medium. (4x pipe section in
front of and behind sensor). If the medium is
likely to cause any deposits in the tube, then an
appropriate fitting position alongside is
recommended.