4
2.2
Primary Gas Connections
The DFM Mass Flow Meter will
not
operate with liquids. Only clean, non corrosive gases
may be introduced into the instrument. If gases are contaminated, theymustbefilteredto
preventtheintroductionofimpedimentstothesensor.
For more information, contact your distributor or Aalborg.
The DPMMassFlowMetercanbemountedinanyposition.It isnotrequiredtomaintain
straight runs
of
pipe
upstream
or
downstream
of
the
meter.
It
is
preferable
to
install
the
meter
in a stable environment,
free
of
frequent
and
sudden
temperature
changes,
high
moisture,
and
drafts.
Prior to connecting gas lines, inspect all parts of the piping system, including
ferrules and other fittings, for dust or other contaminants. Do not use pipe grease or
sealant on process connections
as they can contaminate narrow laminar flow
elements that may cause
permanent
damage
to
the
meter.
When
connecting
the
gas
system
to
be
monitored,
be
sure
to
observe
the
direction
of
gas
flow
as indicated
by the
arrow
on the front
of
the meter.
Insert
tubing
into
the
compression
fittings
until
the
ends
of
the
properly
sized
tubing
sit
flush
against
the
shoulders
of
the
fittings.
Compression
fittings
are
to
be
tightened 1¼
turns
according
to
the
manufacturer's
instructions.
Avoid
overtightening which
may
seriously
damage
the
compression
fitting.
Pressure Requirements
Maximum operating line(common mode)pressure for "BREEZE" Low Differential Pressure
DPM04/14/24/34/44/54 series flow meters is 50PSIG (3.44 Bar). If the installation
line pressure is more than 50 PSIG(3.44 Bar), a pressure regulator must be installed
upstream of the flow meter to bring pressure down to 50PSIG (3.44 Bar).
Maximum operating line (common mode)pressure for DPM07/17/37/47/57/67/77 series flow
meters is 120PSIG (8.3 Bar). If the installation line pressure is more than 120 PSIG (8.3
Bar), a pressure regulator must be installed upstream of the flow meter to bring pressure
down to 120 PSIG (8.3 Bar)
CAUTION:
Some of the IC devices used in the DPM are static-sensitive and
may be damaged by improper handling. When adjusting or servicing the
device, always wear a grounded wrist strap to prevent inadvertent damage to
the integral solid-state circuitry.
CAUTION:
DPM meters should not be used for monitoring oxygen gas unless
specifically cleaned and prepared for such an application.
Содержание DPM Series
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Страница 105: ...BO OT TT TO OM C CO OM MP PO ON NE EN NT S SI ID DE E...
Страница 106: ...AP PP PEN ND DI IX X I II I DI IM ME EN NS SI IO ON NA AL L D DR RAW WI IN NG GS...
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