For meters DN 40, lubricant level depends on the direction of flow, horizontal or vertical.
For the steel-bodied meters, lubricant is filled until it flows out of the level point.
For meters equipped with the multi-position feature, ensure that the front and rear sights are in the
position corresponding to the use of the meter. If required, the change is done by exchange of the
sight and the corresponding plug. If it is necessary to exchange a sight and a plug, it is
recommended that new seals are fitted to these components.
In some installations, stations or cabinets especially, the rear lubricant sight is not always easily
readable. In this case, proceed as follows:
- Depressurise the meter.
- Drain the end cover.
- Using a graduated container, fill the end cover with the volume defined in Annex 5.
4 Accessor ies
4.1 Electrical accessories
Remarks about using the meter in potentially hazardous areas (ATEX):
• Pulse transmitters must be connected to intrinsic safe circuits, according to EN50020.
• Clean the meter head only with a damp cloth.
• All exposed aluminium parts must be suitably protected (using paint, varnish, etc) if a film of
rust is possible from dust in the environment.
• The meter must be earthed.
• Tools used for installing, removing or repairing the meter on site must be appropriate for use
in the hazardous area bearing in mind that the hazardous area classification during meter
replacement may differ from that during normal meter operations.
• The meter shall not be exposed to flame, ionising radiation, ultrasound or strong
electromagnetic field.
4.1.1 Low frequency transmitter (furnished as standard)
The meter is normally delivered with a double LF pulse output transmitter. The LF is a dry reed
switch and is normally open. See the name plate of the meter and Annex 8 for connection
information.
4.1.2 Anti tampering
The DN50 to DN150 are delivered as standard with a anti tampering switch. It is a dry reed switch
and is normally closed. See the name plate of the meter for connection details.
4.1.3 Cyble sensor
A Cyble sensor can be installed onto the totaliser at any time, see Annex 8. The Cyble sensor is a
bounce-free transmitter. It allows also the counting of eventual back flows.
4.1. 4 Medium &high frequency transmitters (furnished as option)
The meter can be delivered with medium or high frequency transmitters. There are inductive
sensors, and connection is to a NAMUR- type input circuit.
.1.5 Pulse values of LF, MF and HF transmitters: see Annex 1
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