Metreg MTM Series User manual

livinggas.
Metreg Technologies GmbH
MTM Turbine
Gas Meters
Manual
living
gas.
livinggas.living

www.metreg-technologies.de
MTM_Manual_EN_16.01.2015
©2014MetregTechnologiesGmbH•Design:www.reidelsoltaugrakdesign.de
All rights reserved. Subject to technical changes.

5
MTM Turbine
Gas Meters
Manual

www.metreg-technologies.de
Table of Content
Manual MTM Turbine Gas Meters
1. Purpose of this Manual ................................................................................................ 5
2. Basic safety instructions ............................................................................................... 5
3. Declaration................................................................................................................. 6
4. Use and Scope ............................................................................................................ 6
5. DesignoftheMTMTurbineGasMeter........................................................................... 6
6. TechnicalData......................................................................................................... 7- 8
7. Installation ................................................................................................................. 8
8. MountingPosition/DirectionofFlow........................................................................... 9
9. Preliminarywork.................................................................................................. 10-11
10. Lubrication and Maintenance of the MTM Turbine Gas Meter ........................................ 12
11. Maintenance of the MTM Turbine Gas Meter ............................................................... 13
12. Commissioning of the MTM Turbine Gas Meter ............................................................ 13
13. DecommissioningoftheMTMTurbineGasMeter........................................................ 13
14. Pulse Generators .................................................................................................. 14-15
15. Pressure Measuring Point ........................................................................................... 16
16. Temperature Measuring Point ................................................................................... 16
17. Cleaning ................................................................................................................... 17
18. Transport and Storage ............................................................................................... 17
19. Annex A ................................................................................................................... 18
20. Annex B .................................................................................................................... 19

5
1. Purpose of this Manual
The instruction manual is dedicated to technical sta with adequate training and technical
knowledgeinthesectorofgasdistributionindustryaccordingtotheapplicabletechnical
lawsandrequirements.ForexamplestawhoareeducatedaccordingDVGWcodesof
practices G 492 and / or G495.
2. Basic safety instructions
Requirements for the personnel
Theoperationalstamustbequalied,instructedandauthorizedaccordingtheassigned
functions.Allserviceandmaintenanceworkshallbeperformedexclusivelybypersonswith
provenexpertknowledge,includingknowledgeofoccupationalsafetyandenvironmental
protection.
Protectiveactionshavetobedenedaccordingthelegalregulations.
Designated use
TheturbinemeterMTMisdesignedforscalorin-plantvolumemeasurementofcombustible
gasesofthe1.,2.and3.gasfamily(naturalgas,towngas,propane,butaneandothers),
puriedanddriedbiogasaswellasotherinert,non-aggressivegasesandnon-explosive
gases and gas mixtures. The permissible operating pressure range reaches up to 100 bar
dependentonthedesignofthemeter,thetemperaturerangerunsfromatleast+5°C
to+55°C.
The manufacturer is not liable for damage caused by improper or not-designated use.
Safety at work
Weartherequiredpersonalprotectiveequipmentaccordingtofederal/nationalregulations.
Operational safety
The device is permitted to operate in technical faultless and fail-safe condition only.
Responsible is the operator.
Product safety
Thismeasuringdeviceisdesigned,manufacturedandtestedaccordingthestate-of-art
demands. It meets all legal requirements and complies with the EC directives.
Themanufacturerconrmsthedevice-specicECDeclarationofConformitybyxing
theCEmarktothedevice.
The device has left the factory in perfect condition.
Warrantycouldbeextendedonlyincaseofproperinstallationandoperationaccording
to this manual.

6
3. Declaration
Declaration of Conformity(AnnexA)
4. Use and Scope
TheturbinemeterMTMisdesignedforscalorin-plantmeteringofnaturalgasandapproved
according the European requirements of EN12261. The MTM turbine meter is suitable to be
installedinhazardousareaofCategory2(Zone1)II2GcIICT4X.
TheMTMturbinemeterissuitableforthefollowinggases:
• Naturalgas,towngas,propane,butane,ethylene,air,nitrogen,noblegases
• Hydrogen(withreducedmeasuringrange)
• conditionedbiogasacc.DVGWG260forcombustiblegases
• Furthergasesonrequest.
TheMTMturbinemetercannotbeusedfor:Oxygen,Acetyleneandotheraggressivegasesas
well as for explosive gases or gas mixtures. The meter should not be used in applications with
the presence of strong pulsations. These conditions will result in an increased error and may
signicantlydecreasethemeter’slifetime.
5. Design of the MTM Turbine Gas Meter
Fig. 1: Sectional view of MTM turbine gas meter
Note: In case of failure or damage: Repairs are only allowed to be done
by authorized repair centers.
1Meter housing
2Turbine rotor
3LF-andanti-tamperingcontact
4Meter index head
5Flowconditioner
6Measuring unit
7Lubrication(oil)pump
1
2
3
4
5
6
7

7
6. Technical Data
Meter type MTM turbine meter
Approval:   MIDaccordingDINEN12261:2002
“Gas meters – Turbine gas meters”;
    OIMLR137-1&2:2012„Gasmeters“
Size: G 65 to G 4000
Nominal diameter:   DN50(3“)toDN300(12“)
Pressure rating: PN 10 up to PN 100 and ANSI CLASS 150 up to ANSI CLASS 600
Rangeability:   20:1orhigherdependingontheoperationpressure
Temperature ranges:
• gastemperature   +5°Cto+55°C
• ambienttemperature   +5°Cto+55°C
• storagetemperature   -25°Cto+55°C
Housing material: Aluminum,CarbonSteel
Max. operation pressure:   100bar(g
Accuracy: Qmin ≤ Q < Qt:±2.0%
Qt≤ Q ≤ Qmax:±1.0%
Rangeability Qt
  1:10,1:20 0,20Qmax
  1:30 0,15Qmax
1:50 0,15Qmax
Meter index
Numberofindexes: 1
Numberofdigitrollersperindex: 8
Meterindexhead:   Composite(optional:Aluminum)
Protectionclass: IP 65
Pulse generators
LF pulse generator:   1LF(reedcontact),add.1LFasoption
Contacttype:   makecontact(normallyopen)
Max.contactload:   10W
Max.switchingvoltage:   50VDC/200VDC
Max.switchingcurrent:   0.1A/0.5A
Resistance:   100Ωinseriestoreedcontact
fmax: 500Hz
HF-pulse generator: 1HF(inductivesensor,acc.NAMURspecs)
Supplyvoltage:   8.2VDC(internalresistanceof1kΩ)
Currentconsumption(sensorcovered): <1mA
Currentconsumption(sensorfree): >2.1mA
Max. switching frequency fmax:  1500Hz
Anti tampering contact: 1 Reed contact
Contacttype:   Normallyclosed
Max.contactload:   10W
Max.switchingvoltage:   175VDC
Max.switchingcurrent:   0.25A
Resistance:   100Ωinseriestoreedcontact

Rangeability and pulse weighting data
*)Theabsolutenumberofthepulsesdependsonthemetersizeandtheindividualmeteritself.
Thestatedvaluesareoftypicalsize.Exactvaluesdeterminedbycalibrationofthemeterare
located on the nameplate.
7. Installation
Recommendations and requirements for the installation of the MTM turbine meter:
•StraightInletpipe≥2DNandoutletpipe≥1DNisrequiredforscalmetering
in case of low level perturbations. In case of high level perturbations a straight
 inletpipe≥4DNisrequired.
•Avoid heavy vibrations and pulsations in the point of measurement.
 Installationofasuitablecompensatorcaneectivelydampdownthiskindofdisturbance.
•Drasticchangesinthegasowaswellasstronglypulsatingowwillincreasethe
measuring error. They arise for example during frequently switching on-o of solenoid
valves. The pressure impulses by opening the valve very fast may damage the ball bearings
of the turbine rotor and cause failure of the turbine meter.
•Filter(smallmeshsize)shouldbeinstalledupstreamofthemetertoprotectitfromany 
 contamination(suspendedparticles>50µm)duringstart-upandoperation.
DN G-type Qmin Qmax HF*)NF
[mm] [m3/h] [m3/h] [imp/m3] [imp/m3]
50 65 10 100 105000 10
80 100 8 160 26000 1
80 160 13 250 26000 1
80 250 20 400 26000 1
100 160 13 250 13500 1
100 250 20 400 13500 1
100 400 32 650 13500 1
150 400 32 650 5000 1
150 650 50 1000 5000 1
150 1000 80 1600 5000 1
200 650 50 1000 2200 1
200 1000 80 1600 2200 1
200 1600 130 2500 2200 1
250 1000 80 1600 1900 0,1
250 1600 130 2500 1900 0,1
250 2500 200 4000 1900 0,1
300 1600 130 2500 1200 0,1
300 2500 200 4000 1200 0,1
300 4000 320 6500 1200 0,1
8

•The gas should be dry. If condensate may be occur then the installation of a condensation
 trapupstreamofthemeterisrecommended(insomeltertypesitisintegrated).
In this case choose
o Flowdirectionfromtoptobottom
o DoNotinstallthemeteratthelowestpointofthepiping
Attention: The MTM turbine meter is not suitable for oxygen and other highly corrosive gases
as well as for explosive gases and gas mixtures.
8. Mounting Position / Direction of Flow
There are two positions of installation possible for the turbine gas meter:
Horizontal installation or vertical installation
Figure 2: Typical horizontal installation of the MTM turbine gas meter (recommended)
Figure 3: Typical vertical installation of the MTM turbine gas meter (only DN ≤ 150)
Notice: Preferably, the meter should be installed horizontally, with index head upward.
Ensure that the gas ow is in the same direction as shown by the arrow at the meter housing.
9
Isolation valve
Isolation valve
Isolation
valve
Filter
MTM
Ventil
Isolation valve
Isolation
valve
Filter
MTM
Isolation valve

DN Pressure Flanges according DIN EN 1092-1
[mm] Class PN Hexagon screws and nuts
Min. operating Strength class Strength class
temperature screws nuts
of the screws
and nuts
  25 40  -10°C  5.6/8.8  5/8
  50 40  -10°C  5.6/8.8  5/8
  80 40  -10°C  5.6/8.8  5/8
  100 40  -10°C  5.6/8.8  5/8
  150 40  -10°C  5.6/8.8  5/8
  200 40  -10°C  5.6/8.8  5/8
  250 40  -10°C  5.6/8.8  5/8
  300 40  -10°C  5.6/8.8  5/8
10
9. Preliminary work
Before the installation of the meter make sure that the following steps has been observed:
1. Remove the plastic cover sheets at the inlet and outlet of the meter.
2.Inspectthemeterforcompleteness(e.g.plugs,providedoilvolume)
and for absence of any transport damages.
3. Cleantheangesurfaces(e.g.withpetroleum).
4. Checkbyblowingintothemeterthatturbinerotorrotateseasilyandstopssmoothly.
5. Priortothemeter’sinstallationcheckthatnocontaminations,condensate,dirtanddebris
are in the pipe. Especially the cleaning of elbows in vertical installations is important to
 preventdamageofthemeterbycontaminations,dirtanddebrispassing.Acone-shaped
 start-upsievemaybeinstalledforinitialoperation.After4-6weeksitshouldberemovedto
 avoidperturbationsoftheowprolewithresultingdecreaseoftheaccuracy.
6. Makesurethatthereisnointrusionofthesealingelementintothepipeduringinstallation
 andoperation(concentricmounting).
7. Checkthatinadditiontothemeter-lengththereisenoughinstallationspacefor
 thetwosealsbetweeninletandoutletanges.
8. The meter must be installed stress-free. Therefore in addition to point 7 observe strictly the
 properalignmentoftheturbinemeter’sinlettooutletaxiswiththeconnectingpipingaxis.
Necessary equipment for the meter installation:
1. Suitableandcerticatedgaskets:
•
DimensionsaccordingDINEN1514-1orDIN2690
2.ScrewsaccordingDINISO4014andASMEB1.1
3.NutsaccordingDINENISO4032andASMEB1.1

During Installation of the meter itself:
1. Makesurethatthemeterismountedintherightowdirection.
2. Makesurethatthemeterisinstalledgas-tight.
3.Makesurethatthemeterisinstalledstress-free.
•
Inhorizontalpipesinstallthemeterwiththeindexheadupright.
  Incaseofverticalinstallationsmakesurethattheoilpumpisintherightposition
  (ifthemeterisequippedwithanoilpump).
•Connecting screws and nuts must be tightened crosswise.
•Forconnectingthepressuretestpointpleaserefertochapter15.
•Forconnectingthetemperaturetestpointpleaserefertochapter16.
A protective cover is recommended for outdoor installation especially
when the meter is mounted together with a volume corrector.
After installation of the meter:
Welding of piping and anges nearby the turbine meter is not allowed.
DN Pressure Flanges according ANSI B 16.5
[mm] ANSI Class Stud bolts with continuous thread and nuts
Operating Strength class Strength class
conditions of the srews nuts
screws and nuts
25 600  -25°C  ASTM A 193 Grade B7 ASTM A 194 Grade 2H
  50 600  -25°C  ASTM A 193 Grade B7 ASTM A 194 Grade 2H
  80 600  -25°C  ASTM A 193 Grade B7 ASTM A 194 Grade 2H
  100 600  -25°C  ASTM A 193 Grade B7 ASTM A 194 Grade 2H
  150 600  -25°C  ASTM A 193 Grade B7 ASTM A 194 Grade 2H
  200 600  -25°C  ASTM A 193 Grade B7 ASTM A 194 Grade 2H
  250 600  -25°C  ASTM A 193 Grade B7 ASTM A 194 Grade 2H
  300 600  -25°C  ASTM A 193 Grade B7 ASTM A 194 Grade 2H
DN Pressure Flanges according DIN EN 1092-1
[mm] Class PN Hexagon screws and nuts
Min. operating srew nut
temperature material material
of the screws
and nuts
  25 100  -40°C  25CrMo4  25CrMo4
  50 100  -40°C  25CrMo4  25CrMo4
  80 100  -40°C  25CrMo4  25CrMo4
  100 100  -40°C  25CrMo4  25CrMo4
  150 100  -40°C  25CrMo4  25CrMo4
  200 100  -40°C  25CrMo4  25CrMo4
  250 100  -40°C  25CrMo4  25CrMo4
  300 100  -40°C  25CrMo4  25CrMo4
11

10. Lubrication and Maintenance of the MTM turbine meter
1. Turbinemeterswithpermanentlubricatedballbearings(nooilpump)
are maintenance-free.
2. Turbine meters with an oil pump need periodic lubrication.
 Theinitiallubricationprocedureis:
a. Use only oil recommended and supplied by Metreg Technologies.
  Onesetofoilforcommissioningisdeliveredwiththemeter.
b. Speciedoil:ShellMorlinaS2BL5orShellMorlinaS2BL10
c. Fillintheoilbeforecommissioningthemeterandafterthecorrectinstallation
of the meter described in chapter 7 and 8.
d. Fillanadequatequantityofoilinthesupplytank,andthenhorizontallypull
  thehandleverdependentonthesizeofthemeter:
  DN50:3strokes
  DN80:5strokes
  DN100:5strokes
  DN150:9strokes
  DN200:18strokes
  DN250:28strokes
  DN300:28strokes
e. Whenthelubricationprocedureisnished,closethecoverofthesupplytank
to avoid any dirt or impurities to enter the lubrication system.
1Hand lever
2 Oilreservoircover
3 Oilreservoir
4 One-wayvalve
Figure 4: Sectional drawing of the oil pump
12

11. Maintenance of MTM turbine gas meters
1. Turbine meters without oil pump do not require special services. They are maintenance-free.
2. Turbinemeterswithanoilpumprequireperiodicallymaintenance:
2.1. Lubricationevery2to3monthsifthegasiscleanandlteredupstreamthemeter:
DN50:2strokes DN80:4strokes
   DN100:4strokes DN150:7strokes
   DN200:9strokes DN250:14strokes
   DN300:14strokes
   Forhigherpressuresitisrecommendedtochoosethelubricationintervalsshorter,
e. g. as shown in point 2.2
2.2. If the gas is carrying dust and/or moisture then the lubrication has to be done
at least every month.
3. Arepairoftheturbinemeterhasonlytobedonebycompetentandauthorizedpersonnel
 liketheServiceEngineersfromMetregTechnologies.
4. Don’tbreakanyseals.Ifonlyoneofthesealsisdamagedorbrokenthemetercannotbeused
 forcustodytransfermeasurementsofnaturalgasaccordingMID(2004/22/EG).
12. Commissioning of the MTM turbine meter
Das Anfahren des MTM Turbinenradgaszählers erfolgt nach der Installation
und ggf. einem Lecktest der Flanschverbindungen:
1. Theworkhastobedoneundersurveyofanappointedpersonwhocoordinates
and controls the activities.
2. Openslowlytheupstreamvalve(g.2andg.3)topressurizethepipe
until operation pressure is achieved.
3. The rate of pressure increase shall not exceed 350 mbar/s.
4. At operation pressure level open the upstream valve completely.
5. Slightlyopenthedownstreamvalve(g.21andg.3).
6. At operation pressure level the downstream valve can be opened completely.
7. Performaleakagetestonthemeteratoperationpressure.
8. Removethestartupsieveafter4to6weeks(ifinstalled).
13. Decommissioning procedure of the MTM turbine meter
1. Theworkhastobedoneundersurveyofanappointedpersonwhocoordinates
and controls the activities.
2. Takecareofappropriateventilationoftheinstallationroom.
3. Depressurizetoatmosphereonlytoareaswithnoactiveignitionsources.
4. Reducetheoperatingpressureslowly(e.g.<350mbar/s).
5. Opentheboltsandnutsoftheangesonlyifthepipeiscompletelydepressurized.
6. Carefullytakeoutthemeterfromthepipeconnection.
13

14. Pulse Generators
Two low frequency (LF) pulse generators are plugged to the meter index head
in standard delivery. A third low frequency (LF) pulse generator is optional.
The function of these three LF-pulsers is:
•1LF-pulserforowmeasurement
•1additionalLF-pulserforowmeasurement(option)
•1LF-pulserasantitamperingcontact.
Figure 5: The LF assembly: Figure 6: Installed LF assembly
with the MTM turbine meter
Asanoptionuptotwohighfrequency(HF)pulsegeneratorscanbeinstalledontothemeter.
ThefunctionofthesetwoHFpulsersisthedeterminationoftheactualgasowinhigh
resolution.TheHF-pulsersfollowNAMURspecicationandaretypicallyconnectedtothe
inputsofowcomputersorappropriatelyequippedvolumecorrectors.Fortheconnection
use shielded cable.
The blades of the turbine rotor are scanned by the high-frequency sensor. Each blade passing
theHF-sensorcreatesapulse.Figure7showsaMTMturbinemeterwithttedHF-sensor.
Figure 7: MTM turbine meter tted with HF-sensor
14

15
The connection of the LF pulse transmitter unit is dierent depending on whether
the meter head is made of composite or aluminum.
Index head out of composite:
The LF-pulser unit comes standard with three meter cable.
The cable conguration is as follows:
•1LF-pulserforowmeasurement
oBlack(-)
oRed(+)
oBlue(+)
•2LF-pulserforowmeasurement(option)
oBlack(-)
oRed(+)
oBlue(+)
•1LF-pulserasantitamperingcontact
oYellow(-)
oWhite(+)
Index head out of aluminium:
The connection of the LF-pulser unit is designed via a plug connection:
•1LF-pulserforowmeasurement
oPin5–Blue(+)
oPin6–Grey(-)
oPin7–Pink(+)
•2LF-pulserforowmeasurement(option)
oPin5–Blue(+)
oPin6–Grey(-)
oPin7–Pink(+)
•1LF-pulserasantitamperingcontact
oPin1–Yellow(-)
oPin2–White(+)
The connection of the HF-pulser (option) is designed
via a plug connection:
oPin4–Red(+)
oPin3–Black(-)
Warning:
All pulse generators are intrinsically safe. If the meter is installed in hazardous area they should be
connected to external devices like electronic volume correctors (EVC´s) only via intrinsically safe circuits.
5
7
6
4
8
3
1
2
1
2
3
5
4

16
Pressure test point
Temperature test point
15. Pressure Measuring Point
There is a pressure test point within the
MTMturbinemeterasshowningure8.
Thepressuretapismarkedwith“pm”.
The pressure test point is designed for
a connection of steel tubing with a
diameter of 6 mm.
The steel tubing should be according
DINEN10305-1andnotmadeofstainless
steelornonmetallicmaterialslikeplastics.
Thepipeconnectionorttingshouldbe
inaccordancetoDIN2353.
Figure 8: Location of the pressure test point
16. Temperature Measuring Point
There is one temperature test point as
showningure9.Thetemperaturetap
ismarkedwith“tm”. The temperature tap
islockedwithascrew(G¼”).Incaseofusing
the temperature tap remove the plug screw
andreplaceitbyatemperaturepocketwith
anintegralthreadofG¼’’.
Thetemperaturepocketisdesignedfora
temperature sensor with a diameter of 6 mm.
Notice: If the temperature tap of the turbine meter
is not used the temperature measurement point
must be located 1-3 DN (but no more than 600 mm)
downstream of the meter.
Figure 9: Location of the temperature test point

17
17. Cleaning
Forcleaningthemeterfromdustanddirtpleasedonotuseanysolvents.
It is suitable to use a damp cloth only for that purpose.
18. Transport and Storage
Theturbinemeterandaccessoriesshallbestoredintheoriginalpackaging.Securethe
measuring device from rotating or slipping. Be careful during loading and transportation
to or from the measuring point.
Some requirements for transportation and storage of the meter are:
•Themeterisonbothangescoveredwithaprotectioncover.
•Fortransportationtheoilpump(ifinstalled)isnotlledwithoil.
•Prevent from rain and moisture.
•Prevent from mechanical vibrations or impacts.
•Unpackandcheck:
o Thepackinglisttoaccountforallitemsreceived.
o Inspect each item for damage.

19. Annex A
CE Declaration of Conformity
18
Metreg Technologies GmbH

20. Annex B
The pulse generators have an own ATEX approval and have the following marking:
Pulse generator Sensor type EG Type-Examination
Certifcate 94/9EG
    Identicationofthe
pulse generators
LF-pulse generator Reedswitch, Connection only
magnetically to intrinsically safe circuits
triggered when installed
    inhazardousarea
HF-pulse generator Proximityswitch PTB01ATEX2191  
acc. NAMUR specs. II 1G Ex ia IIC T6 Ga
Ta:-20…70°C
II 1G Ex ia IIC T5 Ga
     Ta:-20…80°C
     II1DExiaIIICT90°C
     DaTa:-20…70°C
     II1DExiaIIICT100°C
     DaTa:-20…80°C
19

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