Kobold SZM User manual

Operating Instructions
for
By-pass level indicator
Model: SZM

SZM
page 2 SZM K06/0323
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 4
6.Mechanical Connection ................................................................................. 4
7.Electrical Connection .................................................................................... 5
7.1Capacitive switch (option) .................................................................... 5
8.Operation ...................................................................................................... 6
9.Commissioning.............................................................................................. 6
10.Maintenance ................................................................................................. 7
11.Technical Information .................................................................................... 7
12.Order Codes ................................................................................................. 7
13.Dimensions ................................................................................................... 7
14.Disposal ........................................................................................................ 8
15.EU Declaration of Conformance ................................................................... 9
16.EU Declaration of Conformance (contact) ................................................... 10
Manufactured by: Sold by:
Kobold-Unirota Ltd. Kobold Messring GmbH
4400 Nyíregyháza Nordring 22-24
Derkovits út 132-136. D-65719 Hofheim
Tel.: [phone] Tel.: [phone]
Fax: [phone] Fax: [phone]
E-Mail: [email protected] E-Mail: [email protected]
Internet: www.unirota.hu Internet: www.kobold.com

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SZM K06/0323 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.
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
Diagram 7, Pipe, Group 2 no dangerous fluids
Diagram 8, Pipe, Group 1 dangerous fluids
Diagram 9, Pipe, Group 2 no 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:
 By-pass level indicator model: SZM
 Capacitive switch (option)

SZM
page 4 SZM K06/0323
4. Regulation Use
Any use of the device, 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.
5. Operating Principle
The Kobold Unirota SZM model by-pass level indicator works on the basis of the
intercommunicating vessels principle. The SZM type glass tube level indicator is
applicable for the indication of liquid level in small and middle-sized, standing or lying round
containers used in food, pharmaceutical and chemical industries. The level of the liquid in
the glass tube of the appliance is the same with the level in the round containers. The level
of the liquid can be seen through the sight glass.
The loads occurring at the installation is absorbed by the fixing device, thus the
glass tube is protected against breaking. The fixing device also protects the
glass tube against the mechanical impacts that may occur following the
installation. We recommend that the normal design level indicators be fitted on
vessels containing pure liquids, while the indicators mounted with cleaning stubs
(a low, or low-top stub) be fitted on containers filled with contaminated liquid.
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 by-pass level indicator at the side of the round containers, 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.
• If possible, immediately after making mechanical connections, check whether the
connections are properly sealed with no evidence of leakage.
• Make sure that the connections are in plain.

SZM
SZM K06/0323 page 5
7. Electrical Connection
7.1 Capacitive switch (option)
Caution! Make sure that the voltage values of your system
correspond with the voltage values of the measuring unit.
 Make sure that the supply wires are de-energized.
 Plug in the system according to the connecting diagrams.
7.1.1 We recommend the use of wires with cross sectional area of min.
0.25 mm²
Attention! Incorrect wiring will lead to damage of the unit’s
electronics.
7.1.1.1 Wiring diagram
BN
BU
pnp BK
load

SZM
page 6 SZM K06/0323
8. Operation
Capacitive proximity switches are designed for non-contact and wear-free
detection of metal (electrically conductive) and nonmetal (electrically non-
conductive) objects.
Note: Customer cannot retrofit the contacts himself. If retrofitting of contacts is
desired, the SZM should be ordered with a remark “prepared for retrofitting of
limit contact”.
Installing of the capacitive switch
• Slide the switch housing up until the glass tube is empty under the switch.
• Set the switching state LED off by adjusting the potentiometer located the end of
the switch.
• Slide the switch housing down until the glass tube is full under the switch.
• The LED must be on. If not, repeat the process from the first step util the LED
on.
Adjustment of limit-values
The switch-point can be adjusted to the desired levels by using the clamping
screw on the holder of switch.
Reference edge: approx. the middle of the sensor.
Slide the switch housing up or down until the reference edge coincides
with the desired switch-point scale reading.
9. Commissioning
Because of the setting behaviour of seals, all screw connections must be
retightened.
If vent and drain valves have been installed, close them before filling.
Fill vessel and switch on electrical controller, if available. If there are gate valves
between bypass process connection and tank, first slowly open the upper valve
(pressure equalisation) and then the lower valve (liquid side).
Now the liquid in the bypass pipe will rise until the level between the tank and the
bypass pipe is equalised. The value of the liquid level can be read on a scale (if
any) on the bypass tube.

SZM
SZM K06/0323 page 7
10. Maintenance
If the medium to be measured is clean, the series SZM is virtually maintenance-
free.
If deposits form is on the inner housing or parts, periodic cleaning of the unit is
recommended.
At case of SZM-x1…, SZM-x2…, SZM-x3…, SZM-x5…, SZM-x8 (with cleaning
hole):
 Drain the residual medium down from your appliance using the drain valve
(SZM-x5…), the cup of cleaning hole (SZM-x2…, SZM-x3…) or outlet screw
(SZM-x1…).
 If your appliance has shut-off valves, turn them off.
 Remove the units from the container with a suitable tool.
 Screw the cleaning hole out. It can be located at the bottom (SZM-x2…,
SZM-x3…) or top (SZM-x1…, SZM-x3…, SZM-x5…).
 Clean the by-pass level indicator with a suitable cleaning.
 Do the reassembly in reverse order.
11. Technical Information
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com
12. Order Codes
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com
13. Dimensions
Operating instructions, data sheet, approvals and further information via the QR
code on the device or via www.kobold.com

SZM
page 8 SZM K06/0323
14. Disposal
Note!
 Avoid environmental damage caused by media-contaminated parts
 Dispose of the device and packaging in an environmentally friendly manner
 Comply with applicable national and international disposal regulations and
environmental regulations.
Batteries
Batteries containing pollutants are marked with a sign consisting of a crossed-out
garbage can and the chemical symbol (Cd, Hg, Li or Pb) of the heavy metal that
is decisive for the classification as containing pollutants:
Cd1 Hg2 Pb3 Li
4
1. „Cd" stands for cadmium
2. „Hg" stands for mercury
3. „Pb" stands for lead
4. „Li" stands for lithium
Electrical and electronic equipment

SZM
SZM K06/0323 page 9
15. EU Declaration of Conformance
We, KOBOLD Unirota Kft. Nyíregyháza Hungary, declare under our sole
responsibility that the product:
By-pass level indicator Model: SZM-…
to which this declaration relates is in conformity with the standards noted below:
EN IEC 63000:2018 Technical documentation for the assessment of electrical
and electronic products with respect to the restriction of hazardous substances
Also, the following EC guidelines are fulfilled:
2011/65/EU RoHS (category 9)
2015/863/EU Delegated Directive (RoHS III)
Nyíregyháza, 10 May 2022
Dénes Szabó
General Manager

SZM
page 10 SZM K06/0323
16. EU Declaration of Conformance (contact)