Kobold Kal-K Specifications

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Thermal Flow Switch
for Water-Based Liquids
measuring
monitoring
analyzing
KAL-K
Flow Velocities from 0.04...2 m/s
T
: 250 °F, P
max
: 1450 PSIG
max
No Moving Parts
Intelligent Temperature Compensation
Extremely Low Pressure Loss
Easy to Operate
Insensitive to Dirt
KOBOLD companies worldwide:
ARGENTINA, AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHILE, CHINA, COLOMBIA, CZECH REPUBLIC, EGYPT, FRANCE, GERMANY, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA, MEXICO, NETHERLANDS, PERU, POLAND, REPUBLIC OF KOREA, ROMANIA, SINGAPORE, SPAIN, SWITZERLAND, TAIWAN, THAILAND, TUNISIA, TURKEY, UNITED KINGDOM, USA, VIETNAM
05/07-15-2019
KOBOLD Instruments, Inc. 1801 Parkway View Drive Pittsburgh, PA 15205
Main Ofce:
1.800.998.1020
1.412.788.4890 info@koboldusa.com www.koboldusa.com
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Temperatur (C)
0
80
2
Thermal Flow Switch Model KAL-K
Description
The KAL-K thermal flow switch utilizes KOBOLD’s temperature compensating electronics. This compact, one-piece unit provides reliable readings unaffected by temperature or physical characteristics of non-viscous water-based liquids. This is made possible through the use of state-of-the-art microprocessor technology. The microprocessor can be field calibrated to both the liquid properties and operating range in a simple, five minute set-up procedure. This intelligence, coupled with a “no moving parts” design, make the KAL a superior performer in virtually all applications. The KAL-K is also offered in a 3-A compliant version.
The KAL-K incorporates an 8 segment bar-graph LED flow trend indicator and one flow alarm setpoint. The setpoint is fully configurable as NPN, PNP, normally open or normally closed.
Operation
The KAL design is based on the time proven calorimetric principle. The sensor is internally heated to a few degrees above the temperature of the media. Flow causes removal of heat from the sensor, resulting in a cooling effect. The rate of cooling is a measure of the flow velocity. The microprocessor based design of the KAL distinguishes it from the competition. Full temperature compensation of the flow rate is readily obtained through a simple, one-time, calibration procedure. This assures elimination of flow rate reading drift caused by temperature variations in the process liquid.
KAL Timing - Heating and Measuring Cycle
Temperature Compensation
The KOBOLD KAL flow products use a microprocessor to compensate for temperature changes through use of an internal look-up table. End-users can easily adapt the equipment to the requirements of their unique installations. Unlike conventional calorimetric flow switches, the technically advanced design of the KAL provides a flow reading which is unaffected by temperature.
Operating Behavior
1. At t=0, the probe temperature is recorded. This reading represents the ambient liquid temperature.
Schaltpunktveränderung über Temperatur
2. Still at t=0, the KAL begins heating the probe.
3. At t=0.8 seconds, the heating cycle ends and the KAL begins monitoring the probe temperature.
KAL-... with compensation
KAL-... mit Kompensation
4. At t=1.8 seconds, a temperature reading is taken and compared to the t=0.8 second temperature. The rate of cooling
Schaltpunkt (m/s)
Switch point (m/s)
Standard without
Herkömmlich
compensation
ohne Kompensation
is calculated and compared to a Cooling Rate vs Flow Rate table specific to the ambient temperature recorded at t=0.
5. The probe is allowed to cool until t=5.6 seconds. A temperature reading is taken and compared to the initial t=0 reading. If the temperatures are equal (or nearly so), the flow reading is determined valid and passes through to the KAL output. If the temperatures are not equal, the KAL waits
20 30
40
Temperature °C
50
60
70
another 5.6 sec, and Step 5 repeats.
2
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No responsibility taken for errors;
subject to change without prior notice.
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Thermal Flow Switch Model KAL-K
Specifications
Switching Range: 0.04...2 m/s Media: Water-Based Liquids (Water
Content at least 90%); not Suitable for Oils or Fuels
Response Time Typical: 5.6 seconds Optional w/"F": 1.2 seconds Fittings Standard: 1/2" or 3/4" NPT Sanitary: 1-1/2" Tri-Clamp® Flow Trend Indicator: 8 Red LEDs Temperature Rating Operating: 32...250 °F CIP: 280 °F (non-operating) Maximum Pressure Threaded: 1450 PSIG
Approximate Switch Points at Various Pipe Diameters
Sanitary: 600 PSIG or per Clamp Rating Wetted Parts Standard NPT: 304 SS Optional NPT: 316-Ti SS
Sanitary: 316L SS Housing Standard: IP 65 Sanitary: IP 65 Power Requirements Supply Voltage: 24 VDC ± 10% Optional: 110 V Current Draw: 300 mA Max.
AC
Switch Characteristics Adjustment: By Potentiometer Status Indicator: Bi-colored LED 24 VDC Units Type: PNP or NPN, Open Collector Switch Rating DC Only: 400 mA at 24V 110 VAC Units: Type: N/O Dry Contact Switch Rating AC Only: 5A at 240 V
Nominal ID
(inch)
1/2 0.08...4.0
3/4 0.2...9.0
1 0.4...16
1 1/4 0.5...25
1 1/2 0.8...36
2 1.3...64
2 1/2 2.0...100
3 3.0...140
Note:
The approximate flow ranges specified in the table above have been calculated for each pipe diameter from the known flow velocity range of the KAL. 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 very significant deviations from the flow ranges in this data sheet.
Range Water
(GPM)
Nominal ID
Range Water
(inch)
4 6.0...250
6 12...575
8 20...1025
10 35...1600
12 50...2300
16 85...4100
20 130...6400
(GPM)
DC Only: 0.2 A at 110V
For correct operation of the KAL-K thermal flow switch, the tip of the flow sensor must be located sufficiently into the flow stream of the
process to sense the liquid flow. Therefore it is very important to consider the sensor's insertion depth and how it is installed in the process
pipe. If the sensor tip is not adequately immersed into the flow stream, the sensor will not measure flow rate correctly, or worst case will not
detect any flow at all. Ideally for correct detection, we recommend the sensor tip be located at a distance from the pipe wall equal to 20% of
the internal cross-section diameter of the pipe. Note that NPT fittings are tapered, and consideration should be given to the fact that when
installed together, NPT mating fittings will not fully thread down to the bottom of the female connection.
KAL-K Order Details (Example: KAL-4315C)
Fitting
Model
(304 SS)
Model
(316-Ti SS)
1/2" NPT KAL-4215 KAL-4315 -
3/4" NPT - KAL-4320 -
1-1/2"
Tri-Clamp®
- - KAL-4340S
*specify probe length on your order (NPT models only)
No responsibility taken for errors; subject to change without prior notice.
Model
(316 L SS)
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Options
..C = 1/2" NPT Conduit Electrical Connection
..EP = Extended Probe*
..F = Fast Response Time (24 VDC Units Only)
..K = N/C Switch Logic
..M12 = Plug Connector w/6 ft Cable for 24 VDC Units
..P03R = 110 VAC Version with Dry Contact
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Dimensions
Standard Version
Thermal Flow Switch Model KAL-K
1/2" Model
3/4" Model
Sanitary Version
4
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No responsibility taken for errors;
subject to change without prior notice.
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