Kobold KAL-K User manual
Operating Instruction
for
Electronic Flow Monitor
Compact Version
Model: KAL-K
KAL-K
Page 2 KAL-K K11/0623
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 5
6.Mechanical Connection ................................................................................. 6
7.Electrical Connection and Operational Elements .......................................... 6
8.Characteristics .............................................................................................. 8
9.Output Characteristic (only for 24 VDC).......................................................... 9
10.Commissioning............................................................................................ 10
11.Maintenance ............................................................................................... 11
12.Technical Information .................................................................................. 12
13.Order Codes ............................................................................................... 12
14.Dimensions ................................................................................................. 12
15.Disposal ...................................................................................................... 13
16.3A certificate 28-05 ..................................................................................... 14
17.EU Declaration of Conformance ................................................................. 15
18.UK Declaration of Conformity ...................................................................... 17
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: [email protected]
Internet: www.kobold.com
KAL-K
KAL-K K11/0623 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.
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com
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 2006/42/EG.
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:
Electronic Flow Monitor, Compact Version model: KAL-K
KAL-K
Page 4 KAL-K K11/0623
4. Regulation Use
The KOBOLD KAL-K Flow Monitor is intended for use in monitoring and control
applications involving moderate flow rates of aqueous liquids.
Limiting Signal
The devices are equipped with NPN or PNP signals (24 VDC- power supply) or
relay (110 VDC, 110 VAC, 230 VAC power supply) for monitoring the flow velocity of
water.
Trend Display
A LED bar graph display indicates the current flow rate and the set point via a
flashing LED.
Sensor
The model KAL-K consists of a sensor with integrated electronic.
The devices may only be used for aqueous liquids to which the probe material is
resistant. With proper installation and maintenance, the probes are not sensitive
to soiling and cause practically no pressure loss.
Materials
Sensor Stainless steel 1.4301, 1.4305, 1.4571, 1.4404 (Tri-clamp)
Electronic housing Polyamide (glass fibre reinforced)
Setting ranges
in relation to nominal tube diameter
ND (mm) Meas. range (L/min)
wate
r
ND (mm) Meas. range (L/min.)
wate
r
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
Attention! The flow ranges specified in the table above have been
calculated for each pipe diameter based on the known velocity
range of the KAL-K. It must be noted that flow in pipes is non-
uniform across the pipe cross section, and approaches zero at the
pipe wall. This means that, in practice, the depth of installation of
the probe, the internal pipe diameter, and the flow profile of the
liquid in the pipe can interact to produce significant deviations from
the flow ranges in the above table.
KAL-K
KAL-K K11/0623 Page 5
5. Operating Principle
The KAL-K Flow Monitor uses the proven thermal dispersion principle and
operates as follows. The probe is heated internally to a few degrees above the
temperature of the medium into which it extends. The flowing medium removes
this heat from the probe. The cooling rate is proportional to the flow rate. The
measured flow rate is compared to the set point value selected by user. If the set
point is reached, the electronic circuit activates a transistor switch and bi-coloured
alarm LED. The electronic circuit also controls an LED trend indicator which can
be used to indicate relative system flow. The microprocessor- controlled design
permits sample calibration and set-up. The compact probe design permits
monitoring of flow rate with minimal pressure loss.
KAL-K
Page 6 KAL-K K11/0623
6. Mechanical Connection
Prior to installation
Ensure that the actual system flow rate is within the switching range of the
KAL-K.
Ensure that the maximum system temperature and pressure are within the
limits specified per section. (see section Fehler! Verweisquelle konnte nicht
gefunden werden.. Fehler! Verweisquelle konnte nicht gefunden werden.)
Fitting
Mount the sensor into the piping and make sure that it is completely filled with
fluid. The probe tip has to reach at least 5 mm (better > 5 mm) into the pipe (see
below).
Fitting position
The sensor can be mounted in any orientation
as long as the piping is completely filled with
fluid. The mounting position has to be smooth
and free of turbulence.
(Recommended input and output length: 5 x
pipe diameter, of straight - run piping both
upstream and downstream of the flow switch).
In case of sediments in the pipe the shown
mounting position is recommended.
7. Electrical Connection and Operational Elements
Attention! Ensure that the power is disconnected during the
connection of the cable.
Ensure that the voltage of your installation corresponds to the
voltage values given on the device's specification plate.
24 VDC-Version (terminal connector)
Remove electronic cover
(The fixing screws are secured against falling out)
Strip 3-wire cable (approx. 40-60 mm), strip single
wires (approx. 4-6 mm) and pull through cable
gland.
Se d i m e n t s
KAL-K
KAL-K K11/0623 Page 7
Connect wires to terminal connector block according to the drawing.
Tighten cable gland.
After connection, apply supply voltage of 24 VDC ± 20%. (see Fehler!
Verweisquelle konnte nicht gefunden werden.. Fehler! Verweisquelle
konnte nicht gefunden werden.)
Check function of electronic (set point LED must flash)
Calibrate flow switch (see 10. Commissioning)
24 VDC-Version (plug or plug with cable)
Connect wires to terminal connector block according to drawing below.
After connection apply supply voltage of 24 VDC ± 10 %. (see Fehler!
Verweisquelle konnte nicht gefunden werden.. Fehler! Verweisquelle
konnte nicht gefunden werden.)
Check function of electronic (set point LED must flash)
Calibrate flow switch (see 10. Commissioning)
110 VDC, 110 VAC or 230 VAC-version
Remove electronic cover.
(The fixing screws are secured against falling out)
The devices are supplied either with coded cables or a plug connection.
Connect single wires or plug according to drawings below.
After connection apply supply voltage according to label on the device and
technical data (for tolerances see section Fehler! Verweisquelle konnte nicht
gefunden werden.. Fehler! Verweisquelle konnte nicht gefunden
werden.).
Check function of electronic (set point LED must flash).
Calibrate Flow Monitor (see 10. Commissioning).
KAL-K
Page 8 KAL-K K11/0623
8. Characteristics
LED Trend Indicator (1)
The LED trend indicator (8 LEDs) is used to indicate
the flow rate (LED, starting left). The adjusted
switching point is indicated by a flashing LED.
If the flow rate has reached the set point value
selected by the user, then the LED is flashing faster.
Bi-coloured LED (2)
The bi-coloured LED serves
to display the switching point.
RED = ALARM (flow below the set point)
GREEN = (flow above the set point)
The bi-coloured LED is lit all time during this
operation mode.
If a calibration is done the bi-coloured LED flashes
green (see also section 10. Commissioning. ).
If any signal error occurs the bi-coloured LED flashes
red.
SET pushbutton (3)
The calibration switch (set) is used to start the flow
calibration procedure.
Set point Potentiometer (4)
The set point potentiometer is used to adjust the flow set point. You will notice
that the flashing LED moves along the trend indicator scale as the set point
potentiometer is adjusted.
Output Selector Switch (only for 24 VDC) (5)
The output selector switch is used to select between the output logic NPN and
PNP.
(Output selector switch right: NPN-output
Output selector switch left: PNP-output)
KAL-K ...24 VDC
KAL-K..., 110 VDC
110 VAC, 230 VAC
KAL-K
KAL-K K11/0623 Page 9
9. Output Characteristic (only for 24 VDC)
The output characteristics can be set by the output selector switch.
NPN output:
The semiconductor output switches to GND (GROUND =
0 VDC) or is highly resistant. The maximum output current is
400 mA.
The reference point for the NPN-output is +24 VDC.
PNP-output
The semiconductor output switches to +24 VDC or is highly
resistant. The maximum output current is 400 mA. The
reference point for the PNP-output is GND
(GROUND = 0 VDC).
Output function
N/O function
In the N/O function the output switches into the low resistance state.
PNP NPN DUO-LED
Actual value > set point green
Actual value < set point red
Break down power supply off
It is recommended to operate with the N/O switch output because in case of
system flow being above the flow set point - which means that the N/C switch is
de-activated - and the power supply breaks down the output switch will not be
able to switch an "ALARM" anymore.
N/C Switch
(Not recommendable for safety reasons)
PNP NPN DUO-LED
Actual value > set point
green
Actual value < set point
red
Break down power supply
off
3+Vs
GND
1
2
3
1
2
+Vs
GN
D
KAL-K
Page 10 KAL-K K11/0623
10. Commissioning
The use of this meter in machines according to directive 2006/42/EG is prohibited
until the complete machine complies to this directive.
After mechanical (“Mechanical Connection”) and electrical (“Electrical
Connection”) installation of the sensor the KAL-K has to be put into operation as
described in this section.
Calibration
a) Zero flow calibration
Stop the flow of the liquid in the piping in which the sensor is installed. It is
important that the sensor tip be immersed in the liquid. There should be no
bubbles around the sensor tip.
Turn set point adjustment potentiometer counter clockwise to its far left-hand
stop and now briefly press the SET button.
The bi-coloured LED will flash green.
Do not make any changes (potentiometer setting, etc.) while the bi-coloured
LED is blinking. This adjustment phase will last approx. 5-15 sec.
When the bi-coloured LED stops flashing, the zero flow calibration is set.
The device now switches automatically to the monitoring mode and displays
no flow. The LED strip is not illuminated; only the threshold value LED is
flashing.
The Flow Monitor is ready for operation.
b) Calibration of the trend indicator span
The KAL-K is factory checked and pre-set at its maximum span.
At a lower flow speed, not all 8 LEDs will illuminate. To achieve finer monitoring
resolution, the measuring range can be adapted to better fit the actual flow
speed.
Rotate the potentiometer clockwise as far as it will go to the right-hand stop.
The extreme right-hand LED in the LED strip will blink. Set the desired
maximum flow speed.
Now press the SET button. The bi-coloured LED blinks green.
Do not make any changes (potentiometer setting, etc.) while the bi-coloured
LED is blinking. This adjustment phase will last approx. 5-15 sec.
The device now switches automatically to the monitoring mode. This
adjustment has set the device measuring range so that it now extends across
the entire LED strip to indicate the flow value.
The adjustment procedure is now complete. It may be repeated as often as
necessary.
c) Measuring mode
After adjustment, the flow monitor is once again in measuring mode.
The flow is constantly monitored and the actual value of the flow speed is
displayed on the LED strip.
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