ITRON G Serie Manual De Instrucciones página 2

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Pulse transmitters must be connected to intrinsic safe circuits, in accordance with EN
60079-11
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Further identifications or ATEX-Certifications are not necessary.
2.1. Low frequency transmitter (standard totaliser)
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As sensors, Reed switches (normally open) are used. These „passive elements" as well as
the used cables and plug connections are simple electrical equipment in conformance
with 60079-11, paragraph 5.7; they also conform to EN 60079-0. Further technical
information are written in the brochure and data sheet.
2.2. Cyble module (Cyble totaliser optional)
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As an option, a communication module can be installed onto the totaliser equipped with
a Cyble target.
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Further technical information and the installation procedure of the module are written in
the brochure and instruction manual of the respective Cyble modules.
3. Transport and Storage:
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Always keep the meter vertical during transport and installation. Make sure it is well
fixed on the lorry and handled without dropping. Please note that the packing material of
the meters shall be recycled.
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Handle the meters with care during transport. Shock must be avoided. On receipt,
carefully examine the shipping container and the meter itself for any external damage.
Any visible damage should be reported to the carrier.
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Do not remove the protection caps from the meter while in store.
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Do not remove any sealing from the meter; you will invalidate the guarantee of the
product and maybe the fiscal approval of the meter.
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Storage temperature range: -40° to +70°C.
4. Installation:
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The location of the meter must be easily accessible and dry. Avoid direct contact of the
meter casing with soil or concrete walls.
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The device should be installed without be influenced by other components of the
installation.
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The flow direction is indicated by an arrow on the body.
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The piping upstream of the meter should be blown clean with dry air. Dirt and other
foreign materials can cause serious damage of the measuring unit or other parts like
gaskets.
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Before installing the meter in the piping, inspect the threads of the inlet and outlet for
dirt and damage. Foreign material on the threads can cause leakage or damage to meter
connections.
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For flange connections use screws whose shaft protrudes from the nut by at least one
thread pitch.
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Check the alignment, the parallelism, the distance of flanges or studs. Do not use the
meter to adjust badly-fitted piping.
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For the connecting nut of the studs, the following maximum tightening torque apply for
hard gaskets:
Double pipe
Thread G1¾"A
Connection
(DN32)
ACD
G10/16 Distance [mm] 250/280
Torque
110 Nm
Connection Flange DN50
G25 Distance [mm] 335
Torque 85 Nm
Connection Flange DN 65 (M16)
G40
Distance [mm] 430
Torque 85 Nm
Connection Flange DN80
G65 Distance [mm] 500V/640V/680H
Torque 85 Nm
Connection Flange DN100
G100
Distance [mm] 675V/710V
Torque 85 Nm
For other gasket types please refer to the affected standards. The screws of the flange
connections have to be adequate-sized and to be tightened crosswise.
5. Commissioning:
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Caution is necessary when commissioning the meter after installation. The max.
operating pressure and max. flow rate are marked on the name plate. Never exceed
these values.
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Open the outlet valve (if installed) completely. Then open the inlet valve to pressurize
the meter very slowly and avoid pressure pulses. Bring the valve to a fully opened
position.
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Finally check the tightness of all connections.
6. Maintenance – Diaphragm gas meters are maintenance-free:
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When the meter is commissioned properly and the operating conditions stay normal, no
additional maintenance is necessary during the life of the meter.
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Dust and dirt should be removed with solvent and alcohol-free products. Please note
that the meter has to be protected against unusual mechanical, thermal and chemical
damages.
Single pipe
Thread G 2"A Thread G
-
(DN40) 2¾" (DN40)
250/280/290/300 - -
140 Nm 140 Nm -
Thread G2 ½"A Flange DN50 -
335 - -
170 Nm 85 Nm -
Flange DN 65 Flange DN 80
Flange DN 80 (M16)
(M16) (M16)
430 / 500 / 510 - -
85 Nm 85 Nm 85 Nm
- Flange DN80 -
- - -
- 85 Nm -
Flange
- -
DN100
- - -
- 85 Nm -