Kobold OMG User manual

Operating Instructions
for
Screw-Volumeter
Model: OMG

OMG
page 2 OMG K04/0922
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 4
6.General Information ...................................................................................... 4
7.Warranty ....................................................................................................... 5
8.Mechanical Connection ................................................................................. 5
9.Electrical Connection .................................................................................... 6
10.Start up ......................................................................................................... 7
11.Dismounting and Mounting ........................................................................... 7
12.Failure ......................................................................................................... 14
13.Maintenance ............................................................................................... 15
14.Technical Information .................................................................................. 15
15.Order Codes ............................................................................................... 17
16.Dimensions and weights ............................................................................. 18
17.Pressure loss diagram ................................................................................ 20
18.Disposal ...................................................................................................... 21
19.Manufacturer's declaration .......................................................................... 22
20.EU Declaration of conformance .................................................................. 23
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

OMG
OMG K04/0922 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.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations apply-
ing 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 9, Pipe, Group 2 no dangerous fluids
3. Instrument Inspection
All 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:
 Screw-Volumeter model: OMG (incl. pulse generator)
 measuring transducer (only with OMG-../45)

OMG
page 4 OMG K04/0922
4. Regulation Use
Any use of the OMG which exceeds the manufacturers specifications, may invali-
date 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 measuring principle of the KOBOLD
screw-volumeter is positive displacement.
The fluid to be measured causes the
measuring spindles M to rotate. With each
rotation an exact volume is given. These
rotations are being transmitted to the display A
by the pole wheel P and pick up I.
At the display the volume can be shown in any
unit of measurement.
6. General Information
 lt is important that any staff concerned with the unit read the operation and
maintenance manual prior to start up of the unit.
 The user is responsible for taking all precautions outlined in this manual
 This screw-volumeter should not be operated outside of the data specifications
given on the type plate. Any deviations require confirmation from the supplier.
 It is not possible to put all the information you may require in the manual.
Should you require any special information, please contact us.
 Depending on the operating conditions, wear, corrosion or age of the unit, its
specified attributes may be affected. It is therefore essential that the unit is
periodically maintained. The user must replace all parts which would not
guarantee a longer operating life with trouble-free operation. If the unit
operates unusually or damage is observed, it is not allowed to continue
operation.
 Installations which could lead to personal injury and/or material failure should
be equipped with an alarm system and/or bypass. This system should be
checked regularly.

OMG
OMG K04/0922 page 5
7. Warranty
The warranty is according to our terms of delivery. Repairs during the guarantee
period must be carried out only by individuals authorised by us and in accordance
with our agreement and instructions.
8. Mechanical Connection
Mounting position: any
Flow direction: flow direction: both directions are possible, preferable flow D
according to the identification plate.
Minimum pressure: on the outlet of the volumeter the pressure should be higher
than 0,1 bar. In no case the medium may run out free of the
volumeter
Unclean medium: filtration with max. 0,3 - 0,5 mm mesh width is requi
r
ed
Foreign substance: the pipe system must be free from welding beads, scabs a.
s.o., as they can block the volumete
r
Over pressure valve: a blocked volumeter stops the complete flow of the medium,
therefor depending the application, an overpressure valve is
required.
Fastening: without tensions to prevent distortion of the volumeter pipe
thread connection.
Pipe thread connection: the thread length of the pipe may not be longer than the thread
length of the volumeter (reduction of the flow area resp.
damage of internal parts of flowmeter)
Manometer connections: should be approachable
thread: R 1/4")
Storing: incorrect storing can cause corrosion even seizing
Attention: When the volumeter or installations are damaged, medium
could flow out. To prevent consequential damage an appropriate alarm
device should be installed.

OMG
page 6 OMG K04/0922
9. Electrical Connection
The dry sleeve is mounted, adjusted and tested with the pick up inside as a whole
unit, by KOBOLD.
The pick-up insert, including milled nut and spring, are screwed into the dry
sleeve by the customer (see included data sheet).
Caution: The dry sleeve must be free of foreign substance. The
spring must be able to press the pick-up insert flush with the
frontside of the dry sleeve.
The free cable ends will be connected to a display unit according connection dia-
gram and technical data on the included data sheet.
Caution: The complete sensor unit (sensor, measuring transducer
and cable) should not be located in an area of high intensity
electromagnetic field, as may come from high voltage
transmissions, electric motors, frequency converters etc,: this
could cause measuring errors or even destruction of the sensor
system.
Even though the pipe-system is filled the pick-up insert of
the pick-up can be changed without regulating a new
distance to the pole wheel.
Exchange pick-up insert E by opening milled nut R.
Caution: Dry sleeve G must not turn!
OM-…/44
OM-…/45 OM-…/43
Further details about the pulse generators can be found in the additional
instructions: "Operating instructions for pulse generators for the OM series...
Type: /43../44../45"
OM-../43
OM-../45
OM-../44

OMG
OMG K04/0922 page 7
Fig.1
10. Start up
Technical data on the identification plate and on the attached leaflets must be
taken into consideration.
Venting: The system must be free of air (affects the accuracy)
11. Dismounting and Mounting
OMG 15
This work should be done by competent personnel only. This
instruction should be used as a support for this activity. If spindle set,
measuring casing or bearing will be replaced, volumeter must be
recalibrated!
Dismounting:
 do not turn sensor sleeve
 if the red sealing point is damaged, the warranty for the flowmeter
expires
 Remove volumeter from installation
 Remove flange cover (Fig.1)
 Remove bearing cover (Fig.2)
 Press out spindle set (with rolling bearings, distance sleeve and
spacers) from measuring casing (Fig.3)
 change of bearings:
Remove pressed-on pole wheel from measuring spindle with
detaching device.
Remove circlips and spacers
Remove rolling bearings
 Remove o-rings
 Clean all parts carefully, do not scratch sealing surfaces!
Mounting
 mount o-rings
 change of bearings:
press rolling bearings on measuring spindle
 press on pole wheel
 insert measuring spindle set into measuring case (Fig.3)
 press distance sleeve into measuring case
 mount spacers (Fig.3)
 mount bearing cover (Fig.2)
 mount flange cover (Fig.1)
 tighten screws crosswise
 install volumeter (see electrical connection)
Fig.2
Fig.3

OMG
page 8 OMG K04/0922
Fig.1
OMG - 20 / 25
This work should be done by competent personnel only. This
instruction should be used as support for this activity. If spindle set
or measuring casing will be replaced, volumeter must be
recalibrated!
Dismounting:
 do not turn sensor sleeve
 if the red sealing point is damaged, the warranty for the
flowmeter expires
 remove volumeter from installation
 remove end covers. If construction is with flange cover remove it also
(Fig.1)
 press out spindle set (with rolling bearings and distance sleeve)
from measuring casing (Fig.2)
 change of bearings:
Large spindle: loosen the screw, remove wedge-locking plate and
support-device and remove pressed-on pole wheel from
measuring spindle with detaching device
Small spindle: Remove screw, wedge locking plate and support
device.
remove rolling bearings
 remove o-rings
 Clean all parts carefully, do not scratch sealing surfaces!
Mounting:
 mount o-rings
 change of bearings:
 press rolling bearings onto the measuring
spindle
 mount the distance sleeve, the pole wheel,
the support device and the wedge locking
plate with the screw.
 turning moments for the screw:
OMG20: Large spindle 2,9 Nm
Small spindle 1,5 Nm
OMG25: Large spindle 10,0 Nm
Small spindle 6,0 Nm
 mount circlips and spacers (Fig.1)
 press on pole wheel
 insert spindle set into measuring case (Fig.2)
 press distance sleeve into measuring case
 mount end covers. If the construction is with
flange cover, mount these too (Fig.3)
 tighten screws crosswise
 install volumeter
Fig.1
Fig.2
Fig.2
Fig.3

OMG
OMG K04/0922 page 9
OMG - 40 / 50
This work should be done by competent personnel only. This instruction is only
used as support for this activity. If spindle set or measuring casing will be
replaced, volumeter must be recalibrated!
Dismounting:
 do not turn sensor sleeve
 if the red sealing point is damaged, the warranty for the flowmeter expires.
 remove volumeter from installation
 remove end covers (Fig.1).
 remove crown (without pick up) (Fig.2)
 loosen measuring casing and take it off carefully (Fig.3)
 Large spindle: loosen screw, remove wedge locking plate
and support device, remove pressed on pole wheel with detaching
device, remove distance-ring. (Fig.4a)
 remove circlips from crown
 remove spindle set (with rolling bearings) from crown (Fig.4)
 change of bearings:
Small spindle: Loosen screw, remove wedge locking plate
and support device.
remove circlips and spacers (4b)
pull off rolling bearings
 remove o-rings
 Clean all parts carefully, do not scratch sealing surfaces!
Fig.1
Fig.2
Fig.3
Fig.4a
Fig.4
Fig.4b

OMG
page 10 OMG K04/0922
Mounting:
This work should be done by competent personnel only.
This instruction should be used as support for this
activity. If spindle set or measuring casing will be
replaced, volumeter must be recalibrated!
 mount o-rings
 change of bearings:
 mount circlips and spacers (for
boring) on pole wheel side.
 Pay attention to correct position of spacer! (Fig.2)
 turning moment for the screw:
OMG 40: large spindle 25 Nm
small spindle 10 Nm
OMG 50: large spindle 49 Nm
small spindle 25 Nm
 press on rolling bearings
 Caution: mount angular ball bearing in Y-arrangement
 mount circlips and spacers on measuring spindles
 mount spindle set into crown (with pick up) (Fig.3)
 mount circlips on crown
 push up pole wheel and tighten set screw on end face (Fig.4)
 mount measuring casing (Fig.3)
 mount crown (without pick up) (Fig. 5)
 mount flange covers (Fig. 6)
 tighten screws crosswise
 install volumeter
Fig.1
Fig.2
Fig.1a Fig.1b
Fig.3
Fig.4
Fig.5
Fig.6

OMG
OMG K04/0922 page 11
Fig.1
OMG–1H/1F
This work should be done by competent personnel only. This
instruction should be used as support for this activity. If spindle
set or measuring casing will be replaced, volumeter must be
recalibrated!
Dismounting:
 do not turn sensor sleeve
 if the red sealing point is damaged, the warranty for the
flowmeter expires.
 remove volumeter from installation
 remove end covers (Fig.1).
 remove crown (without pick up) (Fig.2)
 loosen measuring casing and take it off carefully (Fig. 3)
 Large spindle: Loosen the screw. Remove the wedge locking plate, the
support device, the pole wheel with the help of a detaching device and the
distance ring. (Fig. 4a)
 remove circlips from crown
 remove spindle set (with rolling bearings) from crown (Abb.4)
 small spindle: loosen the screw. Remove the wedge locking plate and the
support device
 change of bearings:
remove second groove nut with locking plate
remove circlips and spacers
pull off rolling bearings
 remove o-rings
 Clean all parts carefully, do not scratch sealing surfaces!
Fig.2
Fig.3
Fig.4a
Fig.4
Fig.4b

OMG
page 12 OMG K04/0922
Mounting:
This work should be done by competent per-
sonnel only. This instruction should be used as
support for this activity. If spindle set or meas-
uring casing will be replaced, volumeter must
be recalibrated!
 mount o-rings
 change of bearings:
 mount circlips and spacers (for boring) on
pole wheel side.
 press on rolling bearings
 turning moments for the screws:
OMG-1H: large spindle 200 Nm
small spindle 49 Nm
OMG-1F: large spindle 200 Nm
small spindle 86 Nm
 mount circlips and spacers on measuring spindles
 mount groove nut with locking plate on small measuring spindle
(Fig.2)
 mount spindle set into crown (with pick up) (Fig.1)
 mount circlips on crown
 mount pole wheel with spacer, feather, locking plate and
groove nut (Fig. 4)
 mount measuring casing (Fig.3)
 mount crown (with pick up) (Fig.5)
 mount flange covers (Fig. 6)
 tighten screws crosswise
 install volumeter
Fig.1
Fig.1a
Fig.2
Fig.1b
Fig.3
Fig.4
Fig.5
Fig.6

OMG
OMG K04/0922 page 13
Dry sleeve
Dismounting:
 Empty screw volumeter
 Open counter nut (hexagon 24)
 Unscrew the dry sleeve (hexagon 15)
Mounting:
 Screw in the dry sleeve until O-ring is sealed.
 Fill volumeter with medium and start it.
 Screw in the dry sleeve carefully until it slightly grazes the rotating pole wheel
(you can hear it through soft strikes), then turn back and tighten screw.
 Screw in pick up insert into dry sleeve.
 Proof signal with oscilloscope.
 If necessary correct distance.

OMG
page 14 OMG K04/0922
12. Failure
Failure Reason Remedy
too high
pressure
drop
 Viscosity of medium and/or flow
rate too high
 raise temperature (consider allowed
temperature range)
 reduce flow rate
 use bigger volumeter
leakage
 seal not tightened enough
 seal is damaged
 tighten screws
 exchange seal
 check chem. resistance
Blocked
volumeter
 foreign substance
 pick up mounted too far inside
 medium is not lubricating
enough
 not enough inlet pressure
 clean volumeter
 use filtration (see chap. 8)
 adjust pick up
 use OMK

raise inlet pressure
too high
measuring
default
 air lock
 degassing
 too high pulsation
 not enough counter pressure
 operation
-high flow fluctuation
-quantity too small
-different operation data
 high wear
 fault at the pick up and/or
electronic
 remove air
 raise system pressure, reduce temp.
 change pump, modify system
 see min. pressure
 change of operating conditions
 new volumeter
 filtration of abrasive material
 see instructions of pick up and/or
electronic
no signal  defective pick up insert
 defective connection
 screw volumeter is not working
 wrong power supply
 screw out pick up insert and check it: pick
up insert has to send a pulse by
approximation to a ferromagnetic material
(see luminous diode)
 check luminous diode
 check connections
 put screw volumeter into action

adjust electronics
no ordinary
signal
 defective pick up insert
 defective contacts
 external interferences
 distance to pole wheel not
correct
 new pick up insert
 check contacts
 install cables (and measuring transducer)
carefully
 check signal with oscilloscope - correct the
distance

OMG
OMG K04/0922 page 15
13. Maintenance
KOBOLD-volumeters are free of maintenance. At high bearing load it is useful to
change the rolling bearings after a certain service life.
When high accuracy is required, it is further advisable to calibrate the device peri-
odically.
14. Technical Information
Housing: ductile iron EN GJS-400
Spindles: steel nitrated
O-rings: FKM or EPDM
Bearings: steel or hybrid ball bearing
Thread for sensors: M 18 x 1
with O-ring in the case
Viscosity range: 1-5000 mm²/s
Flange: steel (material no. 1.7139), sealing face form C,
according to DIN 2526
Pole Wheel: steel
Operating temperature: -20 to +200 °C (Please note
limitation due to pulse generator.)
Application: lubricating liquids
Accuracy Diagram
The measuring error refers to the actual flow rate. The diagram shows the
characteristic for the OMG-...screw-type volumetric flowmeter. A test certificate is
available because every device delivered is different.

OMG
page 16 OMG K04/0922
OM.../43
OM.../44
OM.../45
Technical Details Pulse Generators
Model System Voltage tmax p
max
face
Material
dry sleeve
Electrical
connection
Protectio
n
43 inductive
PNP
10…30 VDC -20..+100°C
(-25..+90°C)1)
250 bar arcap/
ceramics
right-angle plug with LED
and 3 m cable
IP 65
44 Hall-effect
PNP
10…30 VDC -40..+150°C 420 bar arcap 3 m PTFE cable IP 67
45 magnetic
PNP
10…30 VDC -40..+250°C
(0..+50°C)2)
420 bar arcap incl. transmitter/
cable box with 1 m PTFE
cable
IP 65
1) Connector
2) Transmitter

OMG
OMG K04/0922 page 17
15. Order Codes
Example: OMG-15F15401H4
Flow
rate
[l
/
min]
Code Process connection Pmax1)
[bar] Pulses/L2) Frequency2) [Hz] Gasket Bearings Pulse generator3)
0.1 - 10 OMG-15
R1500 = G½
F1540 = DN15/PN40
F151S =
DN15/PN160
F152F =
DN15/PN250
250 1216 2.0-203
1 = FKM
2 = EPDM
S = steel ball
bearing
3 = model 43
4 = model 44
5 = model 45
0.3 - 30 OMG-20
R2000 = G¾
F2040 = DN20/PN40
F151S =
DN15/PN160
F152F =
DN15/PN250
250 640 3.2-320
H = hybrid
ball bearing
1 - 100 OMG-25
R2500 = G1
F3240 = DN32/PN40
F251S =
DN25/PN160
F252F =
DN25/PN250
250 234 3.9-390
3.5 - 350 OMG-40
R4000 = G1½
F4040 = DN40/PN40
F401S =
DN40/PN160
160 71 4.1-414
7 - 700 OMG-50
R5000 = G2
F5040 = DN50/PN40
F501H =
DN50/PN100
100 39.8 4.6-464
S = steel ball
bearing
20 - 2000 OMG-1H
R1H00 = G4
F1H16 =
DN100/PN16
F1H40 =
DN100/PN40
40 16.8 4.6-560
1 = FKM
50-5000 OMG-1F
R1F00 = G6
F1F16 =
DN150/PN16
F1F40 =
DN150/PN40
40 8.85 7.4-738
1) Please note limitations due to pulse generator and flange pressure rating.
2) Pulse generator 45 has higher pulse/L und output frequency (for values see type plate and on request)
3) Specifications see table „Technical Details Pulse Generators“.

OMG
page 18 OMG K04/0922
16. Dimensions and weights
OMG threaded connection
Model Connection Pressure rating
[bar]
D
[mm]
L1
[mm]
L2
[mm]
T
[mm]
Weight
[kg]
OMG 15R15… G½ 250 90 145 94 16 4.6
OMG 20R20… G¾ 250 74 145 145 16 4.1
OMG 25R25… G1 250 104 215 215 18 11
OMG-40R40… G1½ 160 118 295 240 27.5 18
OMG-50R50… G2 100 138 355 295 30 29
OMG-1HR1H… G4 40 188 480 400 40 70
OMG-1FR1F… G6 40 267 645 537 54 180

OMG
OMG K04/0922 page 19
OMG Flange version
Model Connection Pressure rating
[ba
r
]
D
[mm]
L1
[mm]
L2
[mm]
L3
[mm]
TK
[mm]
Weight
[k
g
]
OMG-15F1540… DN15 PN40 95 145 94 25.5* 65 4.7
OMG-15F151S… DN15 PN160 105 145 94 25.5* 75 4.8
OMG-15F152F… DN15 PN250 130 145 94 25.5 90 6
OMG-20F2040… DN20 PN40 105 185 145 20 75 6
OMG-20F151S… DN15 PN160 105 185 145 20 75 6
OMG-20F152F… DN15 PN250 130 195 145 25 90 8.1
OMG-25F3240… DN32 PN40 140 365 215 25 100 16
OMG-25F251S… DN25 PN160 140 265 215 25 100 16
OMG-25F252F… DN25 PN250 150 275 215 30 105 19
OMG-40F4040… DN40 PN40 150 285 240 22.5 110 21
OMG-40F401S… DN40 PN160 170 295 240 27.5 125 23
OMG-50F5040… DN50 PN40 165 340 295 22.5 125 31
OMG-50F501H… DN50 PN100 195 355 295 30 145 37
OMG-1HF1H16… DN100 PN16 220 450 400 25 180 65
OMG-1HF1H40… DN100 PN40 235 460 400 30 190 70
OMG-1FF1F16… DN150 PN16 285 600 537 31.5 240 170
OMG-1FF1F40… DN150 PN40 300 610 537 36.5 250 180

OMG
page 20 OMG K04/0922
17. Pressure loss diagram