Choice Of Lubricant; Filling And Draining Procedure; Accessories; Electrical Accessories - ITRON Quantometer Delta QD Manual De Instrucciones

• An excess of lubricant can also induce prob-
lems . A surplus of lubricant can contaminate the
measuring chamber, may degrade the metrol-
ogy and cause damage to the bearings and the
impellers due to the mixture of lubricant and
small impurities contained in the gas .
• Always drain the end-covers before moving the
meter .

3.3.2 Choice of lubricant

Viscosity: The viscosity has been calculated to en-
sure mechanical and metrological performance
of the meter .
Commercial references: Annex 3 contains a list
of commercial lubricants usable for industrial gas
except gases such oxygen and halogens . For oth-
er gases, please consult us .
3.3.3 Capacity of the cover:
Horizontal = 10 ml; Vertical = 30 ml

3.3.4 Filling and draining procedure

See Annex 4 for the location of fill, drain plug and
sights .
Filling and draining operations should be carried
out with the meter installed in the piping, but not
pressurised, though the use of Pete's Plugs may
allow lubricant levels to be "topped up" while the
meter is pressurised (up to 20 bar) . See Annex 8 .
Adjusting the level of oil:
General case: The level is correct when it passes
the centre of the lowest sight .

4 Accessories

4.1 Electrical accessories

Remarks about using the meter in potentially haz-
ardous areas (ATEX):
• Pulse transmitters must be connected to intrin-
sic safe circuits, according to EN 60079-11 .
• Clean the meter head only with a 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 taken in account in the light-
ning risk evaluation of the complete installation .
• 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 re-
placement may differ from that during normal
meter operations .
• The meter shall not be exposed to flame, ioni-
sing radiation, ultrasound or strong electroma-
gnetic field .
• Ambient temperature conditions must be con-
sidered, including possible additional heating ef-
fects due to other devices in immediate vicinity .
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 5 for connection infor-
mation .

4.1.2 Anti tampering

The meter is delivered as standard with an 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 5 . The Cyble sensor is a
bounce-free transmitter . It allows also the count-
ing of eventual back flows .
4.1.4 High frequency transmitters (furnished
as option)
The meter can be delivered with high frequency
transmitters . There are inductive sensors, and
connection is to a NAMUR- type input circuit (EN
60947-5-6) .
4.1.5 Pulse values of LF, Cyble sensor and
HF transmitters: see Annex 1

4.2 External dryer cartridge

The meter can be equipped with an external sili-
cagel cartridge for installation in severe environ-
ment conditions . To replace the cartridge, un-
screw the old cartridge, remove the protective
plug of the new cartridge and screw it into the
totaliser .
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