Kobold Heinrichs KDS-K User manual

Heinrichs Messtechnik GmbH
Operating manual KDS/BGK
January 2021
Variable-Area Flowmeters
KDS
BGK
Operating Instructions
KDS-K/C/S
KDS-R
BGK
KDS-(E) analogue output
Betriebsanleitung bitte durchlesen und an einem sicheren Ort aufbewahren!

Heinrichs Messtechnik GmbH
Page 2
Betriebsanleitung KDS/BGK
Contents
1Introduction ...............................................................................................................................................4
2Safety instructions ....................................................................................................................................4
2.1 Installation, start-up and operating personnel ......................................................................................4
2.2 Intended use ..............................................................................................................................................4
2.3 Packaging, mounting and shipment........................................................................................................5
2.4 Returning devices for repair and service ................................................................................................5
3Identification .............................................................................................................................................6
4Applications ...............................................................................................................................................7
4.1 KDS und BGK..............................................................................................................................................7
4.2 KDS-R .........................................................................................................................................................7
5Operational mode and system design.....................................................................................................8
5.1 Measuring principle for BGK and KDS-K/C/S flowmeters.....................................................................8
5.2 KDS-K/C/S and BGK system design ........................................................................................................8
5.3 Measuring principle of the KDS-R ...........................................................................................................8
5.4 KDS-R system design................................................................................................................................8
6Input ........................................................................................................................................................9
6.1 Measured variable.....................................................................................................................................9
6.2 Measuring range .......................................................................................................................................9
6.3 Regulator range.........................................................................................................................................9
6.4 Measuring range table..............................................................................................................................9
7Electrical output ..................................................................................................................................... 10
7.1 Limit switches......................................................................................................................................... 10
7.2 Analogue output..................................................................................................................................... 10
8Measuring accuracy ............................................................................................................................... 11
8.1 Influence of fluid temperature.............................................................................................................. 11
9Conditions of use.................................................................................................................................... 12
9.1 Mounting/start-up................................................................................................................................. 12
9.1.1 Device setting.....................................................................................................................................................................................................12
9.1.2 Switch point setting..........................................................................................................................................................................................13
9.2 Ambient conditions ................................................................................................................................ 13
9.3 Fluid conditions ...................................................................................................................................... 14
10 Construction details, type of construction/dimensions ..................................................................... 15
10.1 KDS-K/C .................................................................................................................................................. 15
10.2 KDS-S....................................................................................................................................................... 16
10.3 KDS-R with ¼“ NPT (F) connection as outlet pressure regulator version ......................................... 17
10.4 KDS-R with ¼“ NPT (F) connection as inlet pressure regulator version ............................................ 18
10.5 BGK with flange connection .................................................................................................................. 19
10.6 KDS / BGK with M12 plug connection .................................................................................................. 19
10.7 Weights ................................................................................................................................................... 20

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 3
10.8 Materials ................................................................................................................................................. 20
10.9 Process connection ................................................................................................................................ 20
11 Available accessories ............................................................................................................................. 20
12 Electrical connection.............................................................................................................................. 21
12.1 Wiring diagram for limit transducer..................................................................................................... 21
Connection M12 plug socket.............................................................................................................................. 21
12.1.1 M12 standard configuration 1 x inductive sensor NJ 1.5-6.5-N........................................................................................................ 21
12.1.2 M12 standard configuration 2 x inductive sensors NJ 1.5-6.5-N......................................................................................................21
12.1.3 M12 standard configuration 1 x inductive sensor NJ 2-11 SN........................................................................................................... 22
12.1.4 M12 standard configuration 1 x inductive sensor NBB 2-6,5M 30-E2 ...........................................................................................22
12.1.5 M12 standard configuration 2 x inductive sensors NBB 2-6.5M 30-E2......................................................................................... 22
13 Indicator unit .......................................................................................................................................... 23
14 Auxiliary power for limit switch............................................................................................................ 23
15 Analog output 4-20 mA ......................................................................................................................... 23
15.1 Measuring principle ............................................................................................................................... 23
15.2 System configuration............................................................................................................................. 23
15.3 Measured variable.................................................................................................................................. 23
15.4 Parameters ............................................................................................................................................. 23
15.5 Electrical connection.............................................................................................................................. 24
16 Use in hazardous areas.......................................................................................................................... 24
16.1 Atmospheric conditions......................................................................................................................... 25
16.2 Electrostatic charge of non-conductive parts ..................................................................................... 25
16.3 Ground connection ................................................................................................................................. 25
16.4 Mechanical stability ............................................................................................................................... 26
16.5 Without electrical equipment ............................................................................................................... 26
16.6 With integrated electrical sensors ....................................................................................................... 26
16.6.1 With limit transducer .......................................................................................................................................................................................26
16.6.2 Analog output 4-20mA ...................................................................................................................................................................................27
16.6.3 Depending on the fluid and ambient temperature................................................................................................................................27
17 CE mark ................................................................................................................................................... 27
18 Standards and directives ....................................................................................................................... 28
19 Order information................................................................................................................................... 28
20 Maintenance ........................................................................................................................................... 28
21 Trouble shooting .................................................................................................................................... 29
22 Decontamination certificate for device cleaning................................................................................. 30
23 Declaration of conformity...................................................................................................................... 31

Heinrichs Messtechnik GmbH
Page 4
Betriebsanleitung KDS/BGK
1Introduction
This installation and operating manual explains how to operate, install and perform maintenance on the
flowmeter. Please read the manual carefully before installing the device and putting it into operation. The
manual does not apply to non-standard versions or applications.
All devices are thoroughly tested and checked for order compliance prior to shipping. Upon receipt of the device,
check it for transport damage.
If any problem comes to light, contact our head office in Cologne. Please describe the problem and indicate type
and serial number of the device. We extend no guarantee of any kind for repair work that is undertaken without
notifying us in advance of the intention to carry out such work. Unless otherwise agreed, any part or component
for which a claim is lodged is to be sent to us for examination.
2Safety instructions
2.1 Installation, start-up and operating personnel
Only trained specialists authorized by the system operator may carry out the installation,
electrical installations, start-up, maintenance and operation. They must read and understand
the operating manual and follow its instructions.
Follow the conditions and provisions applicable in your country.
Heinrichs Messtechnik GmbH accepts no liability for any loss or damage of any kind arising from improper
operation of any product, improper handling or use of any replacement part, or from external electrical or
mechanical effects, overvoltage or lightning. Any such improper operation, use or handling shall
automatically invalidate the warranty for the product concerned.
2.2 Intended use
The KDS or BGK variable-area flowmeters may be used only for flow measurements of non-viscose fluid and
gaseous media. The manufacturer shall not be liable for damages that may result from improper or unintended
use.
The operator carries the sole responsibility for suitability of the device for its intended use. The manufacturer is
not liable for damage caused by improper or non-intended use. Usage of the device other than intended will also
lead to loss of guarantee.
When dealing with an aggressive medium, clarify the material durability of all wetted parts.
When using the device in hazardous areas, follow the applicable national installation rules (see also Section 0
“Use in hazardous areas”).

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 5
2.3 Packaging, mounting and shipment
Carefully unpack the device to avoid damaging it.
With the help of the delivery note enclosed in the packaging, check whether all technically relevant data coincide
with your requirements.
Storage and installation must be done in a clean and dry room so that contamination –especially of the interior
of the fitting –is avoided. Follow the limit values for ambient temperature. When transporting the device to a
remote mounting location, we recommend that you reuse the factory-issued packaging and the transport
protection.
2.4 Returning devices for repair and service
Note: In accordance with the applicable German waste disposal legislation, the owner/client is responsible for
the disposal of special waste and hazardous materials. Consequently, all devices sent to us for repair must be
free of any hazardous materials. This also applies to possible hollow spaces and fissures in the devices. If repair
is necessary, confirm the above-mentioned item in writing.
(For this purpose, please use the form in the Section Fehler! Verweisquelle konnte nicht gefunden werden. ).
If hazardous materials remain in or on the device after it has been returned, Heinrichs Messtechnik is authorized
to remove them at the client’s expense without further inquiry.

Heinrichs Messtechnik GmbH
Page 6
Betriebsanleitung KDS/BGK
3Identification
Manufacturer:
Heinrichs Messtechnik GmbH
Robert-Perthel-Str. 9 
D-50739 Cologne
Germany
Phone: [phone]
Fax: [phone]
Internet: www.heinrichs.eu
E-Mail: [email protected]
Product type:
KDS-K/C/S and BGK:
Miniature flowmeter in full-metal design based on the float principle
KDS-R:
Miniature flowmeter in all-metal design based on the float principle with
differential pressure regulator
Product name:
KDS-K/C
KDS-S
KDS-R
BGK
KDS-(E)
Rear horizontal
connection
vertical
connection
vertical
connection
vertical flange
connection
With analogue output
4-20mA
File name:
KDS-BGK_BA_21.01_EN.DOC
Version No. /
Issue date:
21.01
17. Februar 2021

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 7
4Applications
4.1 KDS und BGK
The KDS and BGK flowmeters are used for measuring the flow of liquid and gaseous products in pipes as well as
dosing, monitoring, adjusting and controlling them. They show the current flow quantity in volume or mass per
unit in time.
4.2 KDS-R
The KDS-R flowmeter can be used for stabilizing set flow quantities of liquid and gaseous products in pipes. The
set quantity is kept constant independent of pressure changes during product inflow for type KDS-R.....N or a
pressure change during product outflow for type KDS-R .....V.

Heinrichs Messtechnik GmbH
Page 8
Betriebsanleitung KDS/BGK
5Operational mode and system design
5.1 Measuring principle for BGK and KDS-K/C/S flowmeters
Float principle:
The product flows through the meter vertically from the bottom to the top, lifting the float until the buoyancy
force and the weight of the float establish equilibrium. The height of the float is a measure of the flow quantity.
5.2 KDS-K/C/S and BGK system design
The meter consists of a conical fitting pipe with a float that can move vertically. The position of the float resulting
from the flow rate is converted to a rotary motion on the pointer axis of the analog indicator unit by the built-in
permanent magnet through the magnetic tracking system.
5.3 Measuring principle of the KDS-R
Differential pressure:
The diaphragm of the regulator is in a state of equilibrium when the pressure conditions are the same on both
sides. The pressure on the input side depends on the pressure of the product and the pressure on the output side
on the pressure drop of the setting valve of the flowmeter.
If the pressure changes either on the input side or the output side, the built-in diaphragm valve causes a pressure
compensation that keeps the set flow rate constant.
Important: The regulator can only adjust pressure fluctuations on the input or the output side. The pressure
conditions on the respective other side must be stable.
5.4 KDS-R system design
The unit consists of a type KDS variable-area flowmeter equipped with a differential pressure regulator.
The variable-area flowmeter consists of the device fitting made of stainless steel with an integrated conical
metal tube and a vertically movable float. The valve for setting the flow rate is built-in.
The height of the float resulting from the flow rate is transmitted by the permanent magnet in the float through
the magnetic tracking system in a rotation to the pointer axis of the analog indicator unit.
The differential pressure regulator is made of stainless steel and consists of a diaphragm made of Perbunan or
PTFE and a compensating valve made of stainless steel.
For gaseous products, two versions are available:
1) KDS-R...-HV- for a constant inlet pressure and a variable outlet pressure
2) KDS-R...-HN- for a constant outlet pressure and a variable inlet pressure
For liquids, both versions can be used; however, the KDS-R...-V version is preferred.

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 9
6Input
6.1 Measured variable
Volume flow
6.2 Measuring range
The lower range value is considered 10 % of the upper range value.
Measuring range span: 10-100 %
Smallest measuring range: 0.1-1.0 l/h water
Largest measuring range: 10-100 l/h water (KDS-K/C)
20-200 l/h water (KDS-S and BGK)
6.3 Regulator range
Largest regulator range: 10-100 l/h water (KDS-R)
6.4 Measuring range table
Type
Measuring
range
Measuring range
for water at
1000 kg/m3
[l/h]
Measuring
range for air at
1.013 bars abs
[Nl/h]
Pressure loss
H2O [mbar *]
KDS-R
Pressure loss
H2O [mbar*]
KDS-K/C
Pressure loss
H2O [mbar]
KDS-S, BGK
KDS-K/C/R
KDS-S
BGK
A
0.1-1.0
3 - 30
350
6
6
B
0.25-2.5
5-50
350
7
7.5
C
0.6-6.0
18 - 180
350
7
7.5
D
1.0-10
30 - 300
350
10
8
E
1.6-16
48 - 480
350
12
9
F
2.5-25
75 - 750
350
17
10
G
4.0-40
120 - 1200
350
25
11
H
6.0-60
180 - 1800
350
45
12
I
10-100
300 - 3000
350
95
15
only
KDS-S, BGK
J
16-160
480 - 4800
-
20
K
20-200
600 - 6000
-
28
*with valve completely open
Additional special flow ranges (for gases only)
Type
Measuring
range
Measuring range
for water at
1000 kg/m3
[l/h]
Measuring
range for air at
1.013 bars abs
[Nl/h]
Pressure loss
H2O [mbar *]
KDS-R
Pressure loss
H2O [mbar*]
KDS-K/C
Pressure loss
H2O [mbar]
KDS-S, BGK
KDS-K/C/R
KDS-S
BGK
L
-
6-60
350
-
7.5
M
-
7-70
350
-
7.5
N
-
11-110
350
-
7.5

Heinrichs Messtechnik GmbH
Operating manual KDS/BGK
January 2021
7Electrical output
7.1 Limit switches
1 or 2 limit switches: Manufacturer: Pepperl & Fuchs
Type: NJ1.5-6.5N,
Connection: M12 plug
Ex-Marking: PTB 00 ATEX 2048 X
II 2G Ex ia IIC T6-T4 Gb
II 2D Ex ib IIIC T 135°C Db
OR
1 limit switch (safety technology): Manufacturer: Pepperl & Fuchs
Type: NJ2-11-SN,
Connection: M12 plug
Ex-Marking: PTB 00 ATEX 2049 X,
II 2G Ex ia IIC T6-T4 Gb,
II 2D Ex ia IIIC T135°C Db,
7.2 Analogue output
4-20 mA, current loop, passive Manufacturer: Heinrichs Messtechnik
Type: KDS-E, (Uo = 14-30 V; Max. load 500 Ω,)
Connection: M12 plug
Ex-Marking: BVS 12 ATEX E 093 X / IECEx BVS 12.0061X
II 2G Ex ib IIC T4 Gb
II 2D Ex ib IIIC T135°C Db
When installing electrical equipment in hazardous areas please pay special attention to the conditions
specified in the applicable approval certificate.

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 11
8Measuring accuracy
Reference conditions: Water 20°C (air 20 °C)
Measured error: ± 3 % qG 50 acc. VDI/VDE 3513
System deviation for KDS-R: ± 5.0 % of URV
Repeatability: ± 1.0 % of URV
KDS-R regulator: ± 1.7 % of URV
Influence of ambient temperature: none
8.1 Influence of fluid temperature
Deviations in fluid temperature from the temperature observed during calibration can result in a proportional
display fault because of the corresponding change in density. Changes in viscosity cause a non-linear display
fault.

Heinrichs Messtechnik GmbH
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Betriebsanleitung KDS/BGK
9Conditions of use
The VDI/VDE guidelines must be observed. The meter is suitable for liquid products with sufficient flowability
that are free of solids, do not bond and do not tend to settle and gases with linear flow behavior and an adequate
inlet pressure.
KDS-R: The minimum differential pressure between input and output side must amoun to 350 mbar.
9.1 Mounting/start-up
The variable-area flowmeter must be installed perpendicularly (direction of flow from the bottom to the top).
The size of the product line to be connected must be identical to the size of the device connection.
Please make sure that there is adequate clearance from parts that might cause magnetic interferences, such as
solenoid valves and ferromagnetic components like steel brackets/supports. For two adjacently mounted devices
we recommend a the minimum lateral distance between them of 300 mm. The devices can be mounted closer
together if they are vertically offset by one device length. The minimum lateral clearance for interfering steel
parts should be 200 mm. In case of doubt, check the interference by moving the device back and forth in the
selected distance by about 200 mm and testing whether the pointer position changes.
Select the mounting location so as to enable a reliable reading of the scale values. Please take note as well of the
space requirement for any possible disassembly of the device.
To achieve stress-free mounting, the flanges of the pipe must be aligned parallel to each other. Please check
whether the pipe is adequately stable to rule out the possibility of vibration or swinging. (Do not use steel
mounting parts on the device.)
If there is risk of dirt or solid matter penetrating the process pipes, flush them beforehand so that these materials
do not get caught in the device. Ferromagnetic solid matter such as spatter can lead to the breakdown of the
device. If these materials are still present during normal operating conditions, mount a magnetic filter
(accessory) in front of the device.
When using gases, slowly let the inlet pressure rise to avoid pressure surges.
Basically, to prevent the float from shooting upwards during flow start-up, the use of solenoid valves should be
avoided.
KDS-S, BGK: Avoid installing a valve directly in front of the device.
9.1.1 Device setting
The measuring equipment is delivered ready for operation according to your order specifications. The limit
transducers are set to the desired values. If you have not submitted any requirements, the basic settings are the
following:
1 contact device: - Minimum contact switching point at 10% of descending flow (damped/closed-circuit principle)
2 contact devices: Minimum contact switching point at 10% of descending flow and maximum contact switching
point at 90% of ascending flow

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 13
9.1.2 Switch point setting
9.2 Ambient conditions
Ambient temperature ranges
without limit transducer: - 25°C to + 80°C
with limit transducer: - 25°C to + 70°C
Storage temperature
All versions: - 25°C to + 80°C
Climatic category
Weather-protected and/or unheated locations: Class C according to IEC 654 Part 1
Degree of protection
Acc. To DIN EN 60529: IP 65 , t
Shock resistance/vibration resistance
To prevent damagehe meter should be protected from extreme shocks and vibrations.
Electromagnetic compatibility
Built-in limit transducer: Acc. with NAMUR recommendation NE 21 and
EN 61326-1:2006
Set pointer to the desired switch point and
adjust scale. Turn up switch cam so that the
edge of the switch cam is located in the center
of the diameter of the proximity switchAmbient
conditions

Heinrichs Messtechnik GmbH
Page 14
Betriebsanleitung KDS/BGK
9.3 Fluid conditions
Fluid temperature ranges KDS-S/C/K and BGK
without limit transducer: - 40°C to + 130°C
with limit transducer : - 25°C to + 100°C
Fluid temperature range KDS-R
Membrane: - 10°C to + 100°C
Fluid pressure limit
KDS-K/C:
PN 40, special version up to PN 160
KDS-S
PN 63, speceial version up to PN 320
BGK
PN 40
KDS-R
16 bar, special version up to PN 40
(The maximum unilateral pressure resistance of the diaphragm is 7 bar)
Inlet and outlet sections
Inlet and outlet sections are not required for a linear flow profile of the fluid. For a non-linear flow profile, we
recommend an inlet section of 150 mm (see also guidelines in accordance with VDI/VDE 3513).
Physical state
Liquid, gaseous
Pressure (for gas measurement)
The measured values only apply to the calibrated fluid data stated on the scale. Any change or deviation in
pressure will cause a display fault.
Pressure loss
Depends on the meter size and the measuring range (see 6.4 Measuring range table).

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 15
10Construction details, type of construction/dimensions
10.1 KDS-K/C
The meter consists of a conical measuring tube with a vertically movable float.
All metallic wetted parts are made of 1.4404 (316L) stainless steel.
The measured values are transmitted magnetically to the analog indicator unit mounted on the device.
KDS-K –process connections horizontally towards the back, mounting dimension: 90 mm (NPT ¼ " F connection)
KDS-C –similar to KDS-K, but with bolt for panel mounting
4-pin plug M12
Design with contacts

Heinrichs Messtechnik GmbH
Page 16
Betriebsanleitung KDS/BGK
10.2 KDS-S
Process connections vertically at the top/at the bottom, mounting dimension: 180 mm (NPT ¼ " F connection)

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 17
10.3 KDS-R with ¼“ NPT (F) connection as outlet pressure regulator version
The unit consists of a variable-area flowmeter with a setting valve and a differential pressure regulator mounted
on the meter.
The measured value is displayed on the scale of the analog indicator unit.
The desired flow rate can be set using the built-in valve.
All metallic wetted parts are made of 1.4404 (316L) stainless steel.

Heinrichs Messtechnik GmbH
Page 18
Betriebsanleitung KDS/BGK
10.4 KDS-R with ¼“ NPT (F) connection as inlet pressure regulator version

Heinrichs Messtechnik GmbH
Operating Manual KDS/BGK
Page 19
10.5 BGK with flange connection
10.6 KDS / BGK with M12 plug connection
All KDS / BGK devices equipped with electrical contacts are connected via an M12 plug socket.
20,5
35,5
58,1

Heinrichs Messtechnik GmbH
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Betriebsanleitung KDS/BGK
10.7 Weights
KDS-K/C:
650 g
KDS-R:
1400 g
KDS-S:
620 g
BGK:
2400 g
10.8 Materials
- Measuring tube, float, connections: 1.4404 (316L) stainless steel
- Indicator unit: Polyamide
- Indicator cover: Ultramide
- Setting valve: 1.4404 (316L) stainless steel
- Valve sealing: KDS-K/C/R) PTFE
- Tube sealing: KDS-S Viton;
- Regulator diaphragm: KDS-R Viton/PTFE
10.9 Process connection
KDS-*: ¼” NPT (F)
Special connections: Ermeto 6/8/10/12/15 mm,
Swagelok 6/8/10/12 mm,
G ¼"(M), G ½“ (M),
Hose connector ¼“ (6.35 mm), available as an adaptor.
Other connections are available a special versions.
Important: The mounting lengths may be differerent.
BGK: Flanges: DN15/25, ANSI ¾“, 1“
Other flanges are available as special versions.
11 Available accessories
Docking adapters, Switch amplifier