Kobold KSK User manual

Operating Instructions
for
Plastic Flow Meter
Model: KSK

KSK
page 2 KSK K03/0316
1. Contents
1.Contents........................................................................................................2
2.Note ..............................................................................................................3
3.Instrument Inspection....................................................................................3
4.Regulation Use..............................................................................................3
5.Operating Principle........................................................................................4
6.Mechanical Connection.................................................................................4
7.Electrical Connection ....................................................................................5
7.1.Reed Contact, bistable (option) ...........................................................5
7.2.Electronic Contact (option)...................................................................6
8.Operation......................................................................................................7
9.Maintenance .................................................................................................7
10.Technical Information....................................................................................8
11.Order Codes ...............................................................................................10
12.Dimensions .................................................................................................11
13.EU Declaration of Conformance..................................................................12
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

KSK
KSK K03/0316 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 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.
as per PED 2014/68/EU
In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the
PED 2014/68/EU no CE mark.
Diagram 6, Pipe, Group 1 dangerous fluids
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:
Plastic Flow Meter model: KSK
Operating Instructions
4. Regulation Use
Any use of the Plastic Flow Meter, model: KSK, which exceeds the
manufacturer’s specification, may invalidate its warranty. Therefore any resulting
damage is not the responsibility of the manufacturer. The user assumes all risk
for such usage.

KSK
page 4 KSK K03/0316
5. Operating Principle
Kobold Plastic Flow Meters and Switches, model KSK, are based on the well
known suspended float principle.
They are used for measuring and monitoring flows in closed pipes.
The media flows, from below, through a conical plastic measuring tube. This
raises the float and the flow rate can be read off against scale. The instruments
can be fitted with bistable switches.
The use of high-quality material PVDF (model KSK 3...)means that this type is
very suited for service with corrosive media.
Special advantages
Shock resistant and corrosion-resistant
May be inserted/removed radially
Special scales available
Short installation length
Plastic float and fitting generally made of PVDF
6. Mechanical Connection
Before Installation:
Remove all transportation safety locks and ensure that no packing material
remains within the unit.
Be sure that the maximum allowable operating pressure and temperature is
not exceeded (see Technical Data).
Install the flow meter in the piping system, ensure the instrument is under no
mechanical stress/tension (install support bracing if necessary).
Protect the measuring tube from external damage.
Avoid pressure peaks in the measuring tube, e.g. from sudden surges or
stoppage of flow.
The units with bistable reed switch may not be installed within an inductive
field.
If possible, immediately after making mechanical connections, check whether
the connections are properly sealed with no evidence of leakage
(see section 8 Operation).
Detailed information regarding installation of float flow meters is
available in VDI/VDE guidelines 3513.

KSK
KSK K03/0316 page 5
7. Electrical Connection
7.1. Reed Contact, bistable (option)
Make sure that the supply wires are de-energized.
Loosen the plug-cap holding screw and remove the cap from the switch
housing.
Connect the supply lines inside the plug in accordance with the connection
diagram opposite.
If the set point has not yet been adjusted, it may be done at this point. (see
section 8. Operation).
Set the plug to the socket and fix it with the safety screws.
Attention! The stated electrical parameters of the contact may not
be exceeded, even for a short period of time. For inductive or
capacitive loads, we recommend the use of contact protection
measures respectively the application of a contact protection relay.

KSK
page 6 KSK K03/0316
7.2. Electronic Contact (option)
Make sure that the supply wires are de-energized.
Loosen the plug-cap holding screw and remove the cap from the switch
housing.
Connect the supply lines inside the plug in accordance with the connection
diagram opposite.
If the set point has not yet been adjusted, it may be done at this point. (see
section 8. Operation).
Set the plug to the socket and fix it with the safety screws.
Attention! The stated electrical parameters of the contact may not
be exceeded. For inductive or capacitive loads, we recommend the
use of contact protection measures respectively the application of a
contact protection relay.
After connecting the external devices, and adjusting the switch housing to the
desired switch points, all the connection work is completed. The unit is ready for
operation.
Signal max. 100mA
LED
+V
S
GND
R
L

KSK
KSK K03/0316 page 7
8. Operation
In order to initialise the bistable switching function, it is essential
that the float activates the contact once in each direction.
Adjustment of limit-values
The switch-point can be adjusted to the desired levels by using both red sliders
as reference points.
Reference edge for falling flow: bottom-edge, switch housing
Reference edge for rising flow: approx. 5 mm above the bottom-edge of switch
housing.
Slide the switch housing up or down until the reference edge coincides with the
desired switch-point scale reading.
Hysteresis
Hysteresis is the difference between the level at which “switch-on” occurs during
rising flow and the level at which “switch-off” occurs during decreasing flow. The
hysteresis is approximately 5 mm on the float range.
Overranging
With non-pulsating flow, the maximum flow rate can be exceeded. Only an
increase in pressure loss will result (max. permissible operating pressure must
not be exceeded!)
9. Maintenance
If the medium to be measured is clean, the series KSK is virtually maintenance-
free. If deposits form on the inner housing or parts, periodic cleaning of the unit is
recommended. Remove the units from the piping with a suitable tool; clean the
flow meter with a suitable cleaning agent or make use of an ultrasonic bath.

KSK
page 8 KSK K03/0316
10.Technical Information
Materials
Measuring tube: Trogamide T (KSK 1..) or polysulfone (KSK 2..) or
PVDF (KSK 3..)
not transparent, but opaque translucent
Float: PVDF
O-rings: EPDM (KSK-1../KSK-2..)
FPM (KSK-3..)
Max. operating pressure: PN 10
Max. operating temp.: KSK 1... max. 60 °C (0...60 °C)
KSK 2... max. 100 °C (0...100 °C)
(60 °C with PVC screwed fitting)
max. 85 °C (with contact)
KSK 3... max. 140°C
Accuracy class: 4 (according to VDE / VDI 3513, sheet 2)
Connection (standard)
KSK 1.. and KSK 2..: PVC glue-in connection
KSK 3...: Welding sleeve

Connection (optional) for KSK 1... and KSK 2... only
KSK-
..080../..150../..200..: Brass or stainless steel union nut
with G 1/2 female or male
or G 3/4 male
KSK-
..300../..500../..999..: PVC union nut with
G 1/2; G 3/4, G 1 internal thread
or G1 female cast iron
KSK-
..015../..025../..050....100..: PVC G 1/4 female
Contacts (optional)
The flow meter can be fitted with either reed contacts or electronic contacts.

KSK
KSK K03/0316 page 9
Reed contacts (bistable)
Switching voltage*: max. 130 VAC
Breaking capacity*: max. 10 W / 10 VA
Switching current*: max. 0.5 A
Contact resistance: < 150 m Ohm
Insulation resistance: > 105 Ohm
Allowed ambient temperature: 0...+ 55 °C
Protection: IP 65
Contact hysteresis: approximately 5 - 7 mm floater distance
* Short-time overshoot is not allowed. The use of a contact protection relay is
therefore recommended (see Accessories Z2 brochure).
Electronic contacts (bistable)
The contact operates electronically with no mechanical parts that are subject to
wear and tear.
Operating voltage: 9 - 24 VDC
Switching output: NPN max. 100 mA
Ambient temperature: 0...+ 55°C
Protection: IP 65
Contact hysteresis: < 6 mm
Dimensions: 33 x 18 x 40 mm
Weight with plug: 16 g
Output signal (with LED at the top)
Float above contact across
PIN 1 and PIN E: 0 V
Float below contact across
PIN 1 and PIN E: 9 - 24 V LED out

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page 10 KSK K03/0316
11.Order Codes
Measuring
range
water L/h
Order no.
Trogamide Order no. Polysulfone Order No. PVDF* Scale measuring range see table Thread fitting option Contact option
1.5 - 11 KSK - 1015... KSK - 2015... -
Standard
H= L/h Water
Special scale
A= air; 0 bar gauge
B= air; 1 bar gauge
C= air; 2 bar gauge
D= air; 3 bar gauge
E= air; 4 bar gauge
F= air; 5 bar gauge
G= air; 6 bar gauge
I= air; 7 bar gauge
K= air; 8 bar gauge
L= air; 9 bar gauge
M= air;10 bar gauge
Y= other
K16= PVC-glue-in connection 16
V16= PVDF-Welding sleeve 16*
P08= PVC G 1/4 female
O0= without contact
S0= 1 N/O contact
SS= 2 N/O contacts
SC= 1 N/O contact/
1 NC contact
C0= 1 NC contact
CC= 2 NC contacts
E0= 1 electr. cont.
EE= 2 electr. cont.
2.5 - 30 KSK - 1025... KSK - 2025... KSK - 3025...*
5 - 50 KSK - 1050... KSK - 2050... KSK - 3050...*
10 - 100 KSK - 1100... KSK - 2100... KSK - 3100...*
8 - 80 KSK - 1080... KSK - 2080... KSK - 3080...* K20= PVC-glue-in connection 20
V20= PVDF-Welding sleeve 20*
IG1= brass G 1/2 female
AG1= brass G 1/2 male
AG3= brass G 3/4 male
IG2= stainless steel G 1/2 female
AG2= stainless steel G 1/2 male
AG4= stainless steel G 3/4 male
O0= without contact
S0= 1 N/O contact
SS= 2 N/O contacts
SC= 1 N/O contact/
1 NC contact
C0= 1 NC contact
CC= 2 NC contacts
E0= 1 electr. cont.
EE= 2 electr. cont..
20 - 150 KSK - 1150... KSK - 2150... KSK - 3150...*
30 - 200 KSK - 1200... KSK - 2200... KSK - 3200...*
30 - 300 KSK - 1300... KSK - 2300... KSK - 3300...*
K32= PVC-glue-in connection 32
V32= PVDF –Welding sleeve 32*
P15= PVC G 1/2 female
P20= PVC G 3/4 female
P25= PVC G 1 female
T25= Cast iron G 1 female
O0= without contact
S0= 1 N/O contact
SS= 2 N/O contacts
SC= 1 N/O contact/
1 NC contact
C0= 1 NC contact
CC= 2 NC contacts
E0= 1 electr. cont.
EE= 2 electr. cont..
50 - 500 KSK - 1500... KSK - 2500... KSK - 3500...*
100 - 1000 KSK - 1999... KSK - 2999... KSK - 3999...*
*KSK-3... for PVDF-Welding sleeve and without air scale only