Metreg MQMe Manuale utente

User Instructions

MQMe

Quantometer with electronic

meter index

Content

General information....................................................................................................................................................4

1.1 Manual.................................................................................................................................................................................................... 4

Safety..............................................................................................................................................................................4

2.1 Symbols.................................................................................................................................................................................................. 4

2.2 Personnel............................................................................................................................................................................................... 4

2.3 Intended use ........................................................................................................................................................................................ 5

2.4 Warranty ................................................................................................................................................................................................ 5

Applications for the MQMe Quantometer..............................................................................................................5

Design of the MQMe Quantometer..........................................................................................................................6

Technical Data..............................................................................................................................................................7

5.1 Working range and pulse weighting data................................................................................................................................. 8

Installation ....................................................................................................................................................................9

6.1 Requirements and recommendations........................................................................................................................................ 9

6.2 Installation location/direction of flow of the gas..................................................................................................................10

6.3 Required material.............................................................................................................................................................................11

6.4 Installation process..........................................................................................................................................................................12

6.4.1 Installation of the MQMe Quantometer ........................................................................................................................................................12

6.4.2 Checkpoints during and after installation of the MQMe Quantometer............................................................................................12

6.4.3 Changing the turning range ..............................................................................................................................................................................13

Commissioning.......................................................................................................................................................... 14

Maintenance/Lubrication........................................................................................................................................ 15

8.1 Maintenance.......................................................................................................................................................................................15

8.2 Lubrication of MQMe with oil pumps .......................................................................................................................................15

8.2.1 Lubrication during commissioning .................................................................................................................................................................15

8.2.2 Layout of the oil pump.........................................................................................................................................................................................15

8.2.3 Regular Lubrication................................................................................................................................................................................................15

Electronic Meter Index............................................................................................................................................. 16

9.1 Display..................................................................................................................................................................................................16

9.1.1 Pressure and temperature display...................................................................................................................................................................16

9.1.2 Display symbols.......................................................................................................................................................................................................17

9.1.3 Power Supply ...........................................................................................................................................................................................................17

9.1.4 Replacing the Battery............................................................................................................................................................................................18

9.2 Integrated volume corrector with compressibility factor calculation...........................................................................20

9.3 Communications data interface..................................................................................................................................................21

Connections............................................................................................................................................................... 23

10.1 MQMe without 4 – 20 mA, with external supply for the MQMe......................................................................................23

10.2 MQMe with external power supply for 4–20 mA and MQMe...........................................................................................23

10.3 MQMe with battery without external power supply for 4–20 mA .................................................................................24

10.4 MQMe operation in the Ex zone..................................................................................................................................................24

10.5 Switching example for the MQMe LF and HF output..........................................................................................................25

www.metreg-technologies.de

Parameter Setting..................................................................................................................................................... 26

11.1 Buttons.................................................................................................................................................................................................26

11.2 Preparation .........................................................................................................................................................................................26

11.3 Changing the Primary Address....................................................................................................................................................26

11.4Changing the maximum value for the 20 mA current output.........................................................................................27

11.5 Changing the Standard Conditions for Pressure and Temperature ..............................................................................27

11.6 Resetting the Volume Counter....................................................................................................................................................28

Measuring Points Pressure und Temperature..................................................................................................... 29

Cleaning...................................................................................................................................................................... 30

Transport and Storage............................................................................................................................................. 30

Außerbetriebnahme................................................................................................................................................. 30

Disposal....................................................................................................................................................................... 30

Annex A....................................................................................................................................................................... 31

Annex B....................................................................................................................................................................... 33

MQMe specification.................................................................................................................................................. 34

1 General information

1.1 Manual

This technical manual is intended for service personnel in the gas supply and gas distribution industry who have received

appropriate training and possess technical knowledge of the applicable technical standards as well as any higher-level or

operational requirements. Only specialists, trained and qualified personnel (e.g. DVGW G 492 and G 495), may carry out work

on the MQMe. The manual contains all information required to ensure safe and proper use of the device.

2 Safety

2.1 Symbols

The following symbols are used in this manual to indicate hazards or to provide information to assist the operators.

The manufacturer assumes no liability for damage resulting from improper or inappropriate use, nor for failure to follow the

instructions.

Risk of serious injury or even death!

There is a risk of serious injuries. Injuries can occur due to unprofessional handling or incorrect operation if the safety

instructions are not observed.

There is a possibility of damage to the device or the surrounding area if the instructions are not followed.

The measurement or the behavior of the device may also be affected!

2.2 Personnel

There is a significant risk of injuries. Injuries can occur due to unprofessional handling or incorrect operation and result in

serious injuries and, in the worst case, death if safety instructions are ignored.

•

Work on the gas lines

may only be carried out by suitable, reliable and trained personnel. Operating personnel must be trained and authorized

for their assigned tasks by the system operator. Protective measures must be defined based on a risk assessment carried

out in accordance with Article 5 of the German Occupational Safety Act (ArbSchG).

•

Occupational safety

Wear the personal protective equipment stipulated by the applicable national regulations and operator regulations

when working on the meter.

•

Operational safety

The meter may be used in technically flawless and operationally safe condition only. Responsibility rests with the

operator.

•

Product safety

The meter was manufactured and tested according to the latest state of the art. It fulfills all legal requirements and

complies with the applicable EC Directives. The manufacturer declares this conformity by attaching the CE mark to the

meter.

The meter left the factory in perfect condition. A manufacturer’s warranty is only provided if the meter is installed and

operated in accordance with the operating instructions. For manufacturer’s declaration and declaration of conformity

see Annex A, page 31.

2.3 Intended use

MQMe Quantometers are designed for the measurement of the volume of combustible gases in the 1st, 2nd and 3rd

families of gases (see also section 3 “Applications for the MQMe Quantometer”, page 5), processed and purified biogas and

air, as well as other inert, non-aggressive and non-explosive gases that are used during operation.

Depending on the variant, the permissible operating pressure range extends up to 16 bar absolute (ANSI 150 optional), the

gas temperature range from -20°C to +55°C.

No other use is authorized.

The manufacturer is not liable for damages resulting from improper or inappropriate use.

2.4 Warranty

Our General Terms and Conditions of Sale as most recently amended apply. Any deviating agreements do not restrict the

statutory rights of the consumer.

Any guarantee beyond this requires a contract and excludes software updates, consumables and vandalism to components.

3 Applications for the MQMe Quantometer

The MQMe Quantometer is designed for metering the volume of natural gas used within a company and is approved in

accordance with European Regulation 2014/68/EU.

The MQMe Quantometer can be installed in potentially explosive atmospheres in category 1G (ATEX/IECEx Ex Zone 0)

Ex ia II C T4 Ga (see Annex B, page 33).

•The MQMe Quantometer is suitable for measuring the volume of the following gases:

•Natural gas, town gas, propane, butane, ethylene, air, nitrogen, noble gases, liquid gas

•Biogas*

•Natural gas with a maximum H2content of 20%

•Other gases can be metered on request

The MQMe Quantometer is not suitable for oxygen and highly corrosive gases, acetylene and other aggressive gases

The MQMe Quantometer should not be used in the presence of strong pulsations. These conditions will increase the

number of measurement errors and could reduce the service life of the MQMe Quantometer.

Possible damage to the MQMe caused by aggressive gases

*Biogas – Please observe our special installation conditions, only in connection with installing an oil pump.

4 Design of the MQMe Quantometer

Meter structure

Meter housing

Turbine wheel

Electronic meter index

Magnetoresistive sensor

Flow straightener

Measuring cartridge

Measuring unit

Fig. 1: Sectional drawing of the MQMe Quantometer

In the case of failure or damage: Repairs may be carried out solely by qualified and authorized service centers and after prior

consultation with Metreg Technologies GmbH.

5 Technical Data

Meter data

Approval

ATEX 2014/34/EU/IECEx Ex-Zone (*in preparation);

Ex ia II C T4 Ga; PED 2014/68/EU

Size

G 10 to G 1.000

Nominal diameter

DN25 (1“) to DN150 (6“)

Pressure rating

PN 16 and ANSI CLASS 150, PN4 with screw connection

Measuring range

1:20, exception DN25 (1“ and 1,5“) with a range of 1:10

Temperature range

Gas temperature

Ambient temperature

Storage temperature

-20°C to +55°C

-25°C to +55°C

Housing material

Aluminum

Max. operating temperature

16 bar absolute (ANSI 150 optional)

Accuracy

min

≤ Q <Q

max

: ±1.0% of Q

max

Electronic meter index

Counter

Electronic index with 9 digits

Meter index head

Aluminum alloy

Protection class

IP65

Battery

Lithium ion battery (calculated service life: 5 years under standard conditions, i.e. ambient

temperature 15–20°C/59–68°F)

Display

LCD display for flow rate and volume under operating and standard conditions for pressure,

temperature as well as battery status

Buttons

4 buttons

Memory

Non-volatile 512-k EEPROM memory for storage of parameters

Integrated volume corrector

(option)

Compressibility factor calculation according to AGA NX-19 or K = constant.

For version with pressure and temperature sensor (AGA NX-19) only with external power supply

Standard conditions

Standard pressure 1,013.25 mbar, standard temperature 273.15

K (0°C); standard pressure and

standard temperature are adjustable

Parameterization

Set in factory

Digital and analog outputs

LF pulser (standard)

Contact type

Max. voltage

Max. current

Max. resistance

Max. switching frequency f

max

Floating reed contact (open collector)

Normally open

24 V

110 mA

5.1 Ω

10 Hz

HF pulser (alternative)

Max. voltage

Max. current

Max. resistance

Max. switching frequency fmax

Floating reed contact (open collector)

24 V

110 mA

5.1 Ω

1,000 Hz

External HF pulser (option)

Supply voltage

Power consumption

Max. switching frequency f

max

Additional inductive sensor on the outside of the meter housing according to NAMUR (scanning at

the turbine wheel, only with external power supply)

8.2 VCC (internal resistance 1 kΩ)

(sensor covered) <1 mA

(sensor free) >2,1 mA

2,500 Hz

Analog output (option)

4–20 mA output (only with external power supply)

Data communication

RS485 interface (option)

Modbus RTU (only with external power supply)

M-Bus interface (option)

M-Bus

Frequent data retrievals on an MQMe in battery mode will affect battery life.

5.1 Working range and pulse weighting data

Type

-Type

DN/Rp Connection type

Measuring range

operating volume flow

Qb [m3/h]

Measurin

g range

ratio

max. gas

HF* [pulses/m3]

ext. pulse

HF* [pulses/m3]

int. pulse

NF* [pulses/m3]

int. pulse

Pressure

drop

[mbar]

Qmin Qmax

MQMe

Rp 1“

Rp female thread

1,6

Rp 1“

4 bar

185.000–195.000

15.080–16.250

MQMe

16 Rp 1“ Rp female thread 2,5 25 Rp 1“ 4 bar 185.000–195.000 15.080–16.250 10 5

MQMe

Rp 1“

Rp female thread

Rp 1“

4 bar

185.000–195.000

15.080–16.250

MQMe

40 Rp 1“ Rp female thread 6,5 65 Rp 1“ 4 bar 185.000–195.000 15.080–16.250 10 5

MQMe

Rp 1½“

Rp female thread

6,5

Rp 1½“

4 bar

185.000–195.000

15.080–16.250

MQMe

10 DN25 Flange 1,6 16 DN25 16 bar 185.000–195.000 15.080–16.250 10 5

MQMe

DN25

Flange

2,5

DN25

16 bar

185.000–195.000

15.080–16.250

MQMe

25 DN25 Flange 4 40 DN25 16 bar 185.000–195.000 15.080–16.250 10 5

MQMe

DN25

Flange

6,5

DN25

16 bar

185.000–195.000

15.080–16.250

MQMe

DN50

Flange

6,5

DN50

16 bar

101.000–107.000

8.416–8.916

MQMe

DN50

Flange

100

DN50

16 bar

101.000–107.000

8.416–8.916

MQMe

100 DN80 Flange 8 160 DN80 16 bar 26.400–27.200 1.885–2.266 1 2

MQMe

160

DN80

Flange

12,5

250

DN80

16 bar

26.400–27.200

1.885–2.266

MQMe

250 DN80 Flange 20 400 DN80 16 bar 26.400–27.200 1.885–2.266 1 4

MQMe

160

DN100

Flange

12,5

250

DN100

16 bar

13.100–13.900

935–992

MQMe

250

DN100

Flange

400

DN100

16 bar

13.100–13.900

935–992

MQMe

400

DN100

Flange

650

DN100

16 bar

13.100–13.900

935–992

MQMe

400 DN150 Flange 32 650 DN150 16 bar 5.100–5.400 318–386 1 10

MQMe

650

DN150

Flange

1.000

DN150

16 bar

5.100–5.400

318–386

MQMe

1.000 DN150 Flange 80 1.600 DN150 16 bar 5.100–5.400 318–386 1 10

The precise number of HF pulses is dependent on the meter size and the calibrated meter itself. The stated values are

typical numbers. The exact values determined for each meter during the calibration are stated on the type plate for the

HF sensor.

6 Installation

6.1 Requirements and recommendations

Risk of injury from explosion!

Unprofessional planning and mounting can lead to explosion hazards:

•Escaping flammable gas in case of system leaks

•Bursting of the system due to the applied gas pressure in case of insufficient strength of components or incorrect

assembly

Therefore, please note:

•All work on the gas supply system must be carried out by trained personnel only, see also section 2.2 “Personnel”,

page 4

•Observe DVGW rules and regulations. Observe national regulations.

•Carefully observe these operating instructions.

The following instructions are intended to support smooth installation of the MQMe Quantometer in the measuring system

in order to prevent damage.

1. Remove the protective film from the inlet and outlet of the meter.

2. Check the completeness of the meter (e.g. cover plugs, volume of oil supplied) and for any possible transport damage.

3. Check that the turbine wheel rotates easily and stops smoothly, e.g. by blowing into the measuring cartridge of the

MQMe Quantometer.

4. Ensure that there are no impurities, condensation, deposits or welding and drilling residues in the pipeline. It is

especially important to clean any elbow pipes in vertical installations to prevent any damage if this dirt passes through

the meter. A cone-shaped startup filter can be installed to protect the meter during its initial operation. This filter and the

collected dirt should then be removed after 4–6 weeks at the latest to prevent any disruption to the flow profile and thus

a reduction in the measuring accuracy

5. In order to achieve a high level of accuracy, it is recommended that a straight inlet pipe with a nominal size of ≥ 3 DN

and an outlet pipe with a nominal size of ≥ 2 DN are used.

6. Vibrations and pulsations should be avoided at the measurement location. The installation of a suitable compensator

can effectively dampen this kind of interference.

7. Abrupt changes in the flow rate and strong pulsating flows of gas will increase measurement errors. These issues can

arise due to e.g. frequently switching on and off the gas flow with solenoid valves. Pressure surges due to the quick

opening of valves can damage the ball bearings in the turbine wheel and cause the meter to fail.

8. Filters (with a small mesh size) should be installed upstream of the meter to protect it, in particular, against dirt particles

>50 µm both during startup and in continuous operation.

9. The gas must be dry. If condensation can occur, it is recommended that a condensate separator is installed upstream of

the meter (a separator is already integrated into some types of filter). In this case, it is recommended that the meter be

installed:

‒with a flow direction from the top to the bottom, and

‒not at the lowest point of the pipeline.

6.2 Installation location/direction of flow of the gas

The arrow on the housing indicates the

correct gas flow direction through the

MQMe.

The MQMe Quantometer can either be installed horizontally or vertically.

Horizontal installation

MQMe

Filter

Bypass

Fig. 2: Recommended horizontal installation of the MQMe, orange arrows indicate gas flow direction

Vertical installation

MQMe

Filter

Bypass

Fig. 3: Typical vertical installation of the MQMe

The specified gas flow direction must be observed.

Possible damage to the MQMe caused by excessive temperatures

When the MQMe is installed, welding work on the pipe system in the vicinity of the MQMe is not permitted.

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