Kobold OVZ User manual

Operating Instructions
for
Oval Gear Wheel Meter
Model: OVZ
O
Or rd de er r f fr ro om m: :
C
C A A B Br ri ig gg gs s
C
Co om mp pa an ny y
622 Mary Street; Suite 101; Warminster, PA 18974
Phone: [phone] - Fax: [phone]
Sa[email protected] - www.cabriggs.com

OVZ
page 2 OVZ K03/0416
1.Contents
1.Contents........................................................................................................2
2.Note ..............................................................................................................3
3.Regulation Use..............................................................................................3
4.Operating Principle........................................................................................4
5.Instrument Inspection....................................................................................4
6.Mechanical Connection.................................................................................5
7.Electrical Connection ....................................................................................6
7.1.General................................................................................................6
7.2.Evaluation electronics:.........................................................................7
7.3.Evaluation electronics: analogue output (..L..).....................................7
7.4.compact electronics:............................................................................7
7.5.Evaluation electronics: Pointer display (..Z300, ..Z340).......................8
8.Operation – evaluation electronics................................................................8
8.1.Frequency output.................................................................................8
8.2.Analogue output...................................................................................8
8.3.Compact electronics ............................................................................8
8.4.Pointer display (..Z300, ..Z340)............................................................8
9.Mechanical Operation...................................................................................9
10.Technical Information....................................................................................9
11.Pressure loss ..............................................................................................11
11.1.POM- plastic housing.........................................................................11
11.2.Aluminium housing.............................................................................12
12.Order Codes ...............................................................................................14
12.1.POM plastic housing..........................................................................14
12.2.Aluminium housing.............................................................................14
13.Maintenance ...............................................................................................15
14.Dismantling / Installation.............................................................................15
15.Recommended spare parts.........................................................................15
16.Dimensions .................................................................................................16
17.Declaration of Conformance .......................................................................20
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

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OVZ K03/0416 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.
By usage in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.
PED 2014/68/EU
In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the PED
2014/68/EU no CE mark.
Diagram 8, Pipe, Group 1 dangerous fluids
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.
Material combinations
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)
Oval gears 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 m

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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 inlet pressure. As the liquid rotates the
gears, a fixed quantity of liquid is transported
through the chambers for every turn of the
oval-wheel pair. Permanent magnets or
stainless steel pins are 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
Instruments are inspected before shipping and sent out in 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
during transit.
Scope of delivery:
Oval wheel meter model: OVZ
Operating Instructions

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OVZ K03/0416 page 5
6.Mechanical Connection
Before installation:
Make sure that the actual flow rate corresponds with the measuring range of
the meter.
Make sure that the approved maximum operating pressure and operating
temperature of the meter are not exceeded.
Remove all transport restraints and ensure that there are no pieces of
packaging left in the meter.
Make sure that there are no welding beads, metal filings, or other pollutants, in
the piping. We strongly recommend you to connect a suitable filter in series
(filtration 30 m).
Installation:
The OVZ may be installed in any position; the liquid may flow in both
directions.
Inlet and outlet pipes are not required.
The connection threads may be sealed with sealing tape etc.
When installing the meters, make sure that the connection threads are not
subjected to large pressure or tensile loads. We recommend that you
mechanically secure the inlet and outlet line approximately 50 mm from the
connections.
If possible, you should check that the joint connections are sealed and leak-
free after mechanical installation.

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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 lines are dead.
Meters with connectors: solder the ends of the connection cable according
to the wiring diagram in the accompanying portable socket-outlets.
Meters with cable connections: connect the connection cable with the
supply cable.
Important! If the connections are incorrectly assigned, the sensor
may be seriously damaged.
DIN-43650 Plug (OVZ-...l401) Al-housing / Pg 9(OVZ-...l302)
Al-Housing / Round plug (OVZ-...l303)
PNP (OVZ-...l304) NAMUR (OVZ-...l305)

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OVZ K03/0416 page 7
1
2
34
+Vs
Signal
Out
n.c.
GND
+Vs
GND
7.2. Evaluation electronics:
Frequency output (OVZ-...F300; ...F3x0)
7.3. Evaluation electronics: analogue output (..L..)
3-wire (OVZ-...L303; ...L343) 3-wire, DIN 43650-plug (OVZ-...L443)
7.4. compact electronics:
(..C30r, ..C30M, ..C34P, ..C34N)
see instruction manual-addition for compact electronics with frequency output.
+Vs
Signal
Out
+Vs
GND
GND

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page 8 OVZ K03/0416
mA
+Vs
GND
Power
1
2
34
+Vs
Signal
Out
n.c.
GND
Plug M12
7.5. Evaluation electronics: Pointer display (..Z300, ..Z340)
Plug the portable socket-outlet into its mating connector on the meter.
8.Operation – evaluation electronics
8.1. Frequency output
The instruments are pre-adjusted. After electrical connection they are ready for
operation.
8.2. Analogue output
The instruments are pre-adjusted. After electrical connection they are ready for
operation.
8.3. Compact electronics
The instruments are pre-adjusted. After electrical connection they are ready for
operation.
For changing of setting refer
to operating manual for
compact electronic with frequency output
8.4. Pointer display (..Z300, ..Z340)
The instruments are pre-adjusted. After electrical connection they are ready for
operation.

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OVZ K03/0416 page 9
9.Mechanical Operation
To avoid pressure peaks, the flow medium should flow slowly into the meter.
Important! Pressure peaks arising from a sudden influx of liquid,
caused by solenoid valves, ball valves etc, may seriously damage the
meter (water hammer!). Ensure that the sensor is always filled with
medium when in the operating state.
Important! Vent the piping, to prevent large air bubbles in the sensor
chamber which may cause measuring errors, erratic flow reading and
can possibly seriously damage the bearings.
10. Technical Information
Viscosity range: 10 to 800 mm2/s
(option: 1000 mm2/s)
Ambient temperature: -10 °C to +60 °C
Medium temperature: -10 °C to +80 °C
Max. pressure: OVZ-..1, OVZ-..2: 10 bar
OVZ-..3, OVZ-..4: 16 bar
OVZ-..5 : 40 bar
Accuracy: ± 2.5 % f. s.
Filter mesh size: max. 30 µm
Material: combination/case/cover
OVZ-..1.. / POM /POM
OVZ-..2.. / POM /PMMA
OVZ-..3.. / aluminium /PMMA
OVZ-..4.. / aluminium /PSU
OVZ-..5.. / aluminium /aluminium
ovals wheels: POM
axles: stainless steel 1.4301
O-rings: NBR; option: FPM, EPDM
Sensor targets: oxide ceramic magnets
or stainless steel
Frequency range: 0.3-9 Hz to 2-57 Hz
Protection: IP 65 (..I401, I302, -I303,
L 443, ...Z 3x0)
IP 67 (all others)

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Electronics
Frequency output (...l401; ...l302; ...l303)
Power supply: 5-24 VDC
Power consumption: typically 10 mA
Pulse output: Hall effect sensor NPN
open collector, max. 15 mA
Electr. connection: connector socket DIN 43650 (...I401)
aluminium adapter box with cable
connection (...I302)
aluminium cover box with circular
connector M12x1 (...I303)
Frequency output (...l304)
Power supply: 18-30 VDC
Power consumption: typically 10 mA
Pulse output: PNP, asymmetrical, open collector
max. 120 mA
Electr. connection: 2 m PVC cable
Frequency output (...l305)
Power supply: nominal 8.2 VDC
Pulse output: Namur, asymmetrical,
max. approx. 3.5 mA (typ. 0.5 mA)
Electr. connection: 2 m PVC cable
Frequency output (...F300)
Power supply: 12-28 VDC
Power consumption: 10 mA
Pulse output: PNP, open collector, max. 25 mA
Electr. connection: connector M12x1
Frequency output with frequency divider (...F3X0)
Power supply: 24 VDC
Power consumption: 15 mA
Pulse output: PNP, open collector, max. 25 mA
Electr. connection: connector M12x1
Divisional factor: acc. to customer specification
Analogue output (...L303; ...L343, ...L443)
Power supply: 24 VDC ± 20 %
Output: 4-20 mA, 0-20 mA, 3-wire
Max. load: 500 ohm
Electr. connection: connector M12x1 or DIN 43650
Option: plug-on display AUF-3000
(with DIN connector only)