Kobold OVZ 1 Series User manual

Operating Instructions
for
Oval Gear Wheel Meter
Model: OVZ-Y43000/30FU

OVZ
page 2 OVZ K04/0522
1.Contents
1. Contents....................................................................................................................2
2. Note ...........................................................................................................................3
3. Regulation Use.........................................................................................................4
4. Operating Principle..................................................................................................5
5. Instrument Inspection..............................................................................................5
6. Mechanical Connection..........................................................................................6
7. Electrical Connection..............................................................................................7
7.1. General...........................................................................................................7
8. Mechanical Operation.............................................................................................8
9. Technical Information..............................................................................................9
9.1. Aluminiumhousing........................................................................................9
10. Maintenance...........................................................................................................10
11. Dismantling /Installation.......................................................................................11
12. Recommended spare parts..................................................................................11
13. Dimensions.............................................................................................................12
14. Disposal...................................................................................................................13
15. EU Declaration of Conformance.........................................................................14
16. UK Declaration of Conformity..............................................................................15
Manufactured and sold by:
KoboldMessring GmbH
Nordring22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail:[e-mail]
Internet: www.kobold.com

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OVZ K04/0522 page 3
2.Note
Please read these operating instructions before unpacking and putting the unit
into operation. Follow theinstructionspreciselyas described herein.
Theinstructionmanualson ourwebsitewww.kobold.comare alwaysfor currently
manufactured version of our products. Due to technical changes, the instruction
manuals available online may not always correspond to the productversion 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
([e-mail])in PDF format, specifyingtherelevantinvoicenumberand
serial number. If you wish, the operating instructions can also be sent to you by
post in paper form against an applicablepostage fee.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applyingto Health & Safety andprevention of accidents.
By usage in machines, the measuring unit should be used only when the
machinesfulfiltheEC-machineguidelines.
PED2014/68/EU
In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the
PED2014/68/EU no CE mark.
Diagram 8, Pipe,Group 1 dangerousfluids

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3.Regulation Use
The model OVZ is an oval gear, positive displacement flowmeter which can be
used to measure and monitor the flowrate of viscous liquid (min. 10 mm²/s to
max. 800 mm²/s); (max. viscosity 1000 mm²/s upon request). Only measure
clean, non-abrasive liquids with adequate lubricating properties, and against
which the materials used in the sensor case are chemically resistant. Ferrite
particles may become deposited on the oval gears as they do contain permanent
magnets, - thus causing maloperation, or destruction of the oval wheel. We
recommend our model MF-RI... magnetic filter if the liquid contains a high
concentration of ferrous solids. In case of uncertainty, please consult your
supplier.
Materialcombinations
Model
OVZ-..1..
OVZ-..2..
OVZ-..3..
OVZ-..4..
OVZ-..5..
Case
POM
POM
Aluminium
Aluminium
Aluminium
Case cover
POM
PMMA
PMMA
PSU
Aluminium
Axle
Stainless steel 1.4301
Rotating sensing
targets
Ceramics(Hall sensor versions) stainless steel (inductive
pickup versions)
Ovalgears
POM
Gaskets
Standard: NBR;option: FPM or EPDM
max. operating
pressure
10 bar
10 bar
16 bar
16 bar
40 bar
max. medium
temperature
-10 to +80 °C
max. ambient
temperature
-10 to +60 °C
Filtration requirements
max. 30 µm

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OVZ K04/0522 page 5
4.Operating Principle
The OVZ oval wheel meter is a positive-
displacement flowmeter. The measuring
element comprises two toothed precision
oval gearwheels, which are driven by the
liquid inletpressure. As the liquid rotates the
gears, a fixed quantityof liquidistransported
through the chambers for every turn of the
oval-wheel pair. Permanent magnets or
stainlesssteel pinsare embedded in the oval
gear-wheels. The rotary gear motion is
converted to a pulse signal by electrical sensors externally fitted into the casing.
The pulse count is a measure of the flow rate. The signals are evaluated by
downstream electronics(optional).
5.Instrument Inspection
Instrumentsare inspectedbeforeshippingandsentoutin perfect condition.
Should the damage to a device be visible, we recommend a thorough inspection
of the delivery packing. In case of damage, please inform your parcel
service/forwarding agent immediately, since they are responsible for damages
duringtransit.
Scopeof delivery:
•Oval wheelmeter model: OVZ

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6.Mechanical Connection
Before installation:
•Make surethat the actual flow rate corresponds with themeasuringrangeof
the meter.
•Make sure that the approved maximum operatingpressure and operating
temperature of themeter are not exceeded.
•Remove all transport restraints and ensurethatthere are nopieces of
packagingleftin the meter.
•Make sure that there are nowelding beads,metal filings,orother pollutants,in
the piping.We stronglyrecommend you to connecta suitablefilterin series
(filtration ≤30 µm).
Installation:
•The OVZ may be installedin anyposition;theliquidmay flow in both
directions.
•Inlet andoutletpipes are notrequired.
•The connection threadsmaybe sealedwith sealingtape etc.
•When installingthemeters, make sure that the connectionthreadsare not
subjected to large pressure ortensileloads.We recommend that you
mechanicallysecuretheinletand outletlineapproximately50 mm from the
connections.
•If possible, you shouldcheckthatthe joint connectionsaresealed andleak-
free after mechanical installation.

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OVZ K04/0522 page 7
7.Electrical Connection
7.1. General
Important! Make sure that the voltages in your plant correspond
with the voltages on the nameplate.
•Make sure that the electrical supply linesare dead.
•Meters with connectors:solder theendsof the connection cableaccording
to thewiring diagram in the accompanyingportablesocket-outlets.
•Meters with cable connections:connecttheconnectioncablewith the
supplycable.
Important! If the connections are incorrectly assigned, the sensor
may be seriously damaged.
PNPRoundplug

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8.Mechanical Operation
•To avoid pressure peaks, the flow mediumshouldflow slowlyintothemeter.
Important! Pressure peaksarising from a suddeninflux of liquid,
caused by solenoid valves, ball valves etc, may seriously damagethe
meter (water hammer!). Ensure that the sensor is always filled with
medium whenin the operating state.
Important! Vent the piping, to prevent large air bubblesin the sensor
chamber which may cause measuring errors, erratic flow reading and
can possibly seriously damage the bearings.

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OVZ K04/0522 page 9
9.Technical Information
Viscosity range: 10 to 800 mm2/s
(option: 1000 mm2/s)
Ambienttemperature: -10 °C to +60 °C
Mediumtemperature: -10 °C to +80 °C
Max. pressure: 16 bar
Accuracy: ± 2.5 % f. s.
Filter mesh size: max. 30 µm
Material: combination/case/cover
aluminium/PMMA
ovals wheels:POM
axles: stainlesssteel 1.4301
O-rings: NBR
Sensortargets: oxide ceramic magnets
or stainlesssteel
Frequencyrange: 0.3-9 Hz to 2-57 Hz
Electronics
Frequencyoutput
Power supply: 18-48 VDC
Power consumption: typically10 mA
Pulse output: PNP, asymmetrical, open collector
max. 20 mA
Electr. connection: plugM12x1
9.1. Aluminiumhousing
OVZ-30...

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10. Maintenance
The meter requires nomaintenanceif themeasuredmediumis not contaminated.
Should it be necessary to clean the meter, the case cover can be easily removed
to gain access to, and clean, the inside of the case (see Sec. 11.
Dismantling/Installation).