Electrical Accessories - ITRON Delta Betriebsanleitung

Both front and rear covers must be filled with lubricant,
except for the Delta Compact aluminium and Delta S1-
Flow steel for which only the front cover must be filled
Adjusting the level of oil:
General case: The level is correct when it passes the cen-
tre
Steel-bodied meters: The lubricant must be filled until it
flows out of the level point "L"
• DN50 S1-Flow: Only the front cover must be filled
with oil 4 plugs "F" or "D" are available to Fill or Drain
the cover; the lowest one must be used for draining
Depending of the orientation of the meter, one level
point "L1" or "L2" must be used to adjust the level of oil
i e unscrewed before the filling The lubricant has to be
filled in "F" until it flows out of the level point "L", only the
lowest level point must be used to adjust the level of oil
4 Accessories

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 EN 60079-11
• Clean the meter head only with a cloth damped with
water
• All exposed aluminium parts must be suitably protec-
ted (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 lightning risk
evaluation of the complete installation
• Tools used for installing, removing or repairing the me-
ter on site must be appropriate for use in the hazardous
area bearing in mind that the hazardous area classifi-
cation during meter replacement may differ from that
during normal meter operations
• The meter shall not be exposed to flame, ionising radi-
ation, 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 nor-
mally open See the name plate of the meter and Annex
6 for connection information
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 6 The Cyble sensor is a bounce-free
transmitter It allows also the counting of eventual back
flows
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4.1.4 Medium & high frequency transmitters
(furnished as option)
The meter can be delivered with medium or high fre-
quency 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, MF
and HF transmitters: see Annex 1
4.2 Gasket-Filter
A "Gasket-filter" can be inserted directly upstream of
flanged meters at the place of the standard gasket: it is
a protection against particles remaining in the upstream
pipe It is recommended to remove it after approximately
4 to 8 weeks of operation
4.3 External dryer cartridge
The meter can be equipped with an external silicagel car-
tridge for installation in severe environment conditions
To replace the cartridge, unscrew the old cartridge, re-
move the protective plug of the new cartridge and screw
it into the totaliser
5 Start-up
5.1 General
The procedure of start-up is always dependent on the
installation configuration
Before pressurising the meter, the lubrication procedure
should be performed Pressurisation or depressurisation
should be carried out with very low pressure change The
pressure change should not exceed 0 3 bar/5 P S I per
second
After start-up, please check the tightness of the instal-
lation
The proper installation and functioning of the meter can
be verified by a visual control of the totaliser (to check
that the meter runs properly) and by measuring its pres-
sure loss while running though the use of Pete's Plugs
may allow this pressure loss to be measured while the
meter is pressurised (up to 20 bar)
5.2 Installation with by-pass:
See Annex 7
START-UP:
Begin with all valves closed
• Slowly open the by-pass valve to pressurise the
downstream piping
• When the pressure is balanced downstream, slowly
open the small upstream valve V1 The pressure vari-
ation should not exceed 0 3 bar per second
• When the pressure is balanced in the meter, slowly
open the main upstream valve and then close V1
• Slowly open the downstream valve and check that the
meter starts to register the flow
• Gradually, close the by-pass valve Check that the flow
rate doesn't exceed the capacity of the meter
5