ITRON Delta User Manual

4
Keep this manual easily accessible for all users.
Ask for a written approval of the manufacturer for
all cases not planned in this instruction manual.
Please respect all national rules for installation,
operation and service of gas meters.
1 Characteristics
Delta meters are designed to measure gases of
the 1st, 2nd and 3rd gas families as specified in
EN437 as well as various filtered and non-corro-
sive gases.
General characteristics: See Annex 1
2 Packing
• The meter, depending on the size or version is
delivered:
• In a cardboard box, protected by carton inserts
or polyethylene wedges.
On a wood pallet, protected by a cardboard cover.
The packing shall contain the filling lubricant, plugs
for the installed transmitters and this instruction
manual.
2.1 Storage
If the meter is not going to be used immediately,
it should be stored under cover in a clean, dry
environment, in the horizontal position.
The caps fitted in the inlet and outlet pipe must
stay in place until installation.
2.2 Handling
The meter is delivered without lubricant in cov-
ers. Before shipping or handling, ensure that the
lubricant has been thoroughly drained from the
front and the rear covers to prevent spillage into
the measuring chamber. Meters should be lifted
only with belt around the main body or with the
eyelets.
3 Installation
3.1 General
Due to the volumetric principle of the Delta me-
ter, its metrology is not influenced by the instal-
lation conditions. Nevertheless the respect of the
following rules will insure the best use of your
Delta meter:
Recommended installation: See Annex 2
• Check visually that the meter has not been
damaged during transport.
• No welding is allowed with meter installed.
• The meter should be installed with the impellers
horizontal. Allowed deviation: +/- 5°.
• Never install a meter at a low point in the piping
where the meter could be subject to the accu-
mulation of water or particles.
• If Teflon tape is used to tight threaded joint then
the best attention must be taken to avoid intro-
ducing tape in the measuring chamber.
• The meter should be installed without stress in
the piping. The flanges must be correctly lined
up.
• On ANSI flanges the threads are NOT metric
but defined in inch following ANSI/ASME B1.1
– 1989.
Metric threads and threads defined in inch are
not compatible!
• Please tighten bolts in opposite pairs
• A flexible coupling can be used to ensure a
stress-free installation.
• The use of a filter, placed upstream of the me-
ter, is advisable in gas with high particulate con-
tent. See § 3.2.
Before installation:
• The piping upstream of the meter should be
free of dust.
• Remove the protective caps.
• Ensure that the direction of gas flow corre-
sponds with the arrow situated on the meter
body.
• Check that the impellers turn freely.
3.2 Filtration
Rotary meters work better if there are no particles
within the gas. It is advisable therefore to filter the
gas upstream of the meter. Recommended level
of filtration is 100 μm or better.
While the meter is in service, periodically check
the cleanliness of the filter, especially in the case
of a new installation or after work has been per-
formed on the upstream piping.
For installation with flow direction from bottom to
top a particular attention has to be taken to the
filtering conditions to avoid that accumulation of
dust downstream of the meter may come back
into the meter. For example a second filter can
be installed downstream of the meter.

ITRON Delta Specifications

General

Brand	ITRON
Model	Delta
Category	Measuring Instruments
Language	English