Absolut Encoder S1D - Elster RGV Mode D'emploi

15. Absolut ENCODER S1D (Type RVG)
– This has the same features as counter head S1D.
– Can be used as main counter on gas meters.
– Available as a top-mounted unit (transmitter unit) on
meters with mechanical index drive (counter head
version II).
– The encoder is suitable for connection to a series-
connected additional device (volume corrector, data
logger or bus system) in potentially explosive
atmospheres (see table: Technical Data). A device
connected to the terminal box must feature at least the following approval as a related
equipment for this:
[ EEx ia IIC ] for version with Namur interface,
[ EEx ib IIC ] for version with SCR interface.
The version with M-BUS interface is not ATEX-approved!
Connection of the Absolut ENCODER S1D unit to the mechanical index drive of the
meter
– Connect the connector of the top-mounted unit to the mechanical index drive of the
driving unit (e.g. counter head version II).
– Use a locking screw to secure the encoder top-mounted unit against pulling out.
– The locking screw must be lead-sealed for applications requiring mandatory calibration.
– If you wish to synchronise the encoder with the counter reading of your operating meter
after installation or conversion, you will require the Instructions "Encoder synchronisation"
and a special tool. In such cases, we recommend that you contact our Elster-Instromet
Customer Service (Tel. +49 (0)6134-605-0 / -346).
Connection of the encoder
– Use only a screened cable (DIN EN
60079-14) to connect the encoder
and ensure that the pin assignment
is correct (see sticker next to the
cover of the terminal box), Figure 9.
– When connecting the Namur inter-
face, ensure that the 2-wire connec-
tion has the correct polarity. The M-Bus and SCR interfaces are independent of the
polarity.
– It is possible to apply screening and to run a cable to the meter housing or the pipe. Make
sure to check in advance that the earthing system used allows earthing on both sides
(earth loops and potential difference in earthing).
© Elster GmbH · All rights reserved · Subject to technical modification
Figure 9: Encoder sticker
Elster-Instromet
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