Kobold KAL-D Operating Manual
Operating Instructions
for
Compact Calorimetric
Flow Monitor
Model: KAL-D
KAL-D
1. Contents
1. Contents ........................................................................................................ 2
2. Note .............................................................................................................. 3
3. Instrument Inspection .................................................................................... 3
4. Regulation Use .............................................................................................. 4
5. Operating Principle ........................................................................................ 5
6. Mechanical Connection ................................................................................. 5
7. Electrical Connection .................................................................................... 6
8. Indicators and Controls ................................................................................. 7
9. Signal Output ................................................................................................ 8
9.1. Output function .................................................................................... 8
10.Commissioning .............................................................................................. 9
11.Error Messages ........................................................................................... 11
12.Maintenance ............................................................................................... 11
13.Technical Information .................................................................................. 12
14.Order Codes ............................................................................................... 12
15.Dimensions ................................................................................................. 13
16.EU Declaration of Conformance .................................................................. 14
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.de@kobold.com
Internet: www.kobold.com
page 2 KAL-D K03/0516
KAL-D
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.
By usage in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.
3. Instrument Inspection
Instruments are checked before dispatch and should arrive in perfect condition.
In case of damage, please inform your local Kobold office or if you had the parcel
delivered by a parcel service, contact your parcel service / forwarding agent
immediately, since they are responsible for damages during transit. Should the
damage to a device be visible, we recommend a thorough inspection of the
delivery packing.
Scope of delivery:
Flow Monitor Model KAL-D
Operating Instructions
KAL-D K03/0516 page 3
KAL-D
4. Regulation Use
This device must be installed, operated and maintained according to this
installation instruction. Any damages resulting from mis-use or mis-application
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.
The model KAL-D flow monitor is used to monitor the flow of liquids.
Limit value / output
To monitor the flow of liquids in pipes, the device is fitted with a PNP transistor
switch (NPN optionally available). The switch setpoint is field adjustable via
potentiometer.
Trend indicator
The actual flow value is indicated by a serial of constantly illuminated LEDs on
the LED bargraph display. The current switchpoint relative to flowrate is indicated
on the LED bargraph by the individually blinking LED.
Sensor
The model KAL-D flow switch consists of a sensor with an evaluating electronic
circuit. The unit should only used for water like liquids for which the sensor
material is chemically resistant. Medium up to high viscous liquids as well as
strong temperature absorbing media are not suited for operation. In case of doubt
please contact the manufacturer.
The KAL-D is an electronic housing which meets IP 65/NEMA 4X protection
requirements when properly installed. There are no moving parts in the flow
stream and the smooth sensor surface is designed for minimal pressure loss
when operating.
Materials of Construction
Sensor Stainless steel 1.4404
Electronics housing Stainless steel 1.4301
Measuring and switching ranges
These figures are based on nominal pipe size (NPS).
NPS (mm) Approximate measuring
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 - 21.2 60 6.8 - 340
20 0.75 - 37.7 80 12.0 - 603
25 1.18 - 59.0 100 18.8 - 942
30 1.70 - 84.8 150 42.4 - 2120
page 4 KAL-D K03/0516
NPS (mm) Approximate measuring
range (L/min)
water
KAL-D
Caution! The flow ranges specified in the table above have been
calculated for each pipe diameter based on the known velocity
range. It must be noted, that flow in pipes is non-uniform across
the pipe cross section, and approaches zero at the pipe wall.
Depending on the pipe size, immersion depth of the sensor and
flow profile it may lead to significant deviations of the flow
ranges above.
5. Operating Principle
The operation of the model KAL-D electronic switch monitor is based on the
calorimetric principle. The sensor tip is heated to a few degrees above the
temperature of the flowing liquid. When the liquid is flowing, the heat generated in
the sensor is transferred to the liquid, i.e. the sensor is cooled. The cooling time is
an accurate measure of the flow speed. The sensor signal is compared with the
reference data (setpoint) stored in a micro-controller. The micro-controller allows
easy calibration and ideal temperature compensation to account for variations in
liquid temperature.
6. Mechanical Connection
Before installation
Make sure that the actual flow velocity corresponds to the switching range of
the device.
Make sure that the maximum operating pressures and service temperatures
specified for the device will not be exceeded.
(See 13 Technical Information)
Installation
Mount the sensor in the pipe and ensure that the tip is covered by the liquid to be
monitored. The sensor tip must extend at least 5 mm (better > 5 mm) into the
pipe (see below).
KAL-D K03/0516 page 5
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