Kobold OMH-15 User manual

Operating Instructions
for
Screw-Type Volumetric Flow Meter
High Pressure Version
Model: OMH

OMH
page 2 OMH K02/1122
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 ................................................................................. 6
9.Electrical Connection .................................................................................... 7
10.Start up ......................................................................................................... 8
11.Pressure bearing capacity ............................................................................. 9
12.Dismounting and Mounting ......................................................................... 15
13.Failure ......................................................................................................... 22
14.Maintenance ............................................................................................... 23
15.Technical Information .................................................................................. 23
16.Order Codes ............................................................................................... 25
17.Dimensions and weights ............................................................................. 26
18.Pressure loss diagram ................................................................................ 28
19.Disposal ...................................................................................................... 29
20.EU Declaration of conformance .................................................................. 30
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

OMH
OMH K02/1122 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:
 Measuring device type: Screw-Type Volumetric Flow Meter High Pressure
Version OMH (incl. pulse generator)
 measuring transducer (only with OMH-../45)

OMH
page 4 OMH K02/1122
4. Regulation Use
Any use of the OMH 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.

OMH
OMH K02/1122 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.

OMH
page 6 OMH K02/1122
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.

OMH
OMH K02/1122 page 7
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
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

OMH
page 8 OMH K02/1122
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)

OMH
OMH K02/1122 page 9
11. Pressure bearing capacity
Pressure bearing capacity OMH 15
A Short-term operation
B Continuous operation
C Pressure loss
D Flow rate
E Qnenn
The values apply for lubricating liquids at temperature up to 120 °C. Abrasive and
aggressive liquids reduce the service file.

OMH
page 10 OMH K02/1122
Pressure bearing capacity OMH 20
A Short-term operation
B Continuous operation
C Pressure loss
D Flow rate
E Qnenn
The values apply for lubricating liquids at temperature up to 120 °C. Abrasive and
aggressive liquids reduce the service file.

OMH
OMH K02/1122 page 11
Pressure bearing capacity OMH 25
A Short-term operation
B Continuous operation
C Pressure loss
D Flow rate
E Qnenn
The values apply for lubricating liquids at temperature up to 120 °C. Abrasive and
aggressive liquids reduce the service file.

OMH
page 12 OMH K02/1122
Pressure bearing capacity OMH 40
A A Short-term operation
B Continuous operation
C Pressure loss
D Flow rate
E Qnenn
The values apply for lubricating liquids at temperature up to 120 °C. Abrasive and
aggressive liquids reduce the service file.

OMH
OMH K02/1122 page 13
Pressure bearing capacity OMH 50
A Short-term operation
B Continuous operation
C Pressure loss
D Flow rate
E Qnenn
The values apply for lubricating liquids at temperature up to 120 °C. Abrasive and
aggressive liquids reduce the service file.

OMH
page 14 OMH K02/1122
Pressure bearing capacity OMH1H
A Short-term operation
B Continuous operation
C Pressure loss
D Flow rate
E Qnenn
The values apply for lubricating liquids at temperature up to 120 °C. Abrasive and
aggressive liquids reduce the service file.

OMH
OMH K02/1122 page 15
Fig.1
12. Dismounting and Mounting
OMH 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

OMH
page 16 OMH K02/1122
Fig.1
OMH - 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:
OMH20: Large spindle 2,9 Nm
Small spindle 1,5 Nm
OMH25: 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

OMH
OMH K02/1122 page 17
OMH - 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

OMH
page 18 OMH K02/1122
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:
OMH 40: large spindle 25 Nm
small spindle 10 Nm
OMH 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

OMH
OMH K02/1122 page 19
Fig.1
OMH–1H
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

OMH
page 20 OMH K02/1122
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:
OMH-1H: large spindle 200 Nm
small spindle 49 Nm
OMH-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