Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации

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DVC6000 Digital Valve Controllers
September 2013 2-20
Remove electrical power before
disconnecting any of the pneumatic
connections.
When disconnecting any of the
pneumatic connections or any
pressure retaining part, natural gas
will seep from the unit and any
connected equipment into the
surrounding atmosphere. Personal
injury or property damage may result
from fire or explosion if natural gas
is used as the supply medium and
appropriate preventive measures are
not taken. Preventive measures may
include, but are not limited to, one or
more of the following: Remote
venting of the unit, re-evaluating the
hazardous area classification,
ensuring adequate ventilation, and
the removal of any ignition sources.
For information on remote venting of
this controller, refer to page 2-22.
Ensure that that the covers is
correctly installed before putting this
unit back into service. Failure to do
so could result in personal injury or
property damage from fire or
explosion.
The DVC6000 can be used with air or natural gas as
the supply medium. If using natural gas as the
pneumatic supply medium, natural gas will be used in
the pneumatic output connections of the DVC6000 to
any connected equipment. In normal operation the unit
will vent the supply medium into the surrounding
atmosphere unless it is remotely vented.
Natural Gas Certified, Single Seal instruments can be
identified by the natural gas approval label shown in
figure 2-17. The Natural Gas Certified, Single Seal
device option simplifies conduit sealing requirements.
Read and follow all local, regional, and federal wiring
requirements for natural gas installations. Contact your
Emerson Process Management sales office for
information on obtaining a Natural Gas Certified,
Single Seal DVC6000 digital valve controller.
Supply pressure must be clean, dry air that meets the
requirements of ISA Standard 7.0.01.
Alternatively, natural gas must be clean, dry, oil-free,
and noncorrosive. H
2
S content should not exceed 20
ppm.
LABEL LOCATED ON
TOP OF TERMINAL
BOX
Figure 2-17. Gas Certified Label
A maximum 40 micrometer particle size in the air
system is acceptable. Further filtration down to 5
micrometer particle size is recommended. Lubricant
content is not to exceed 1 ppm weight (w/w) or volume
(v/v) basis. Condensation in the air supply should be
minimized.
A 67CFR filter regulator with standard 5 micrometer
filter, or equivalent, may be used to filter and regulate
supply medium. A filter regulator can be integrally
mounted onto the side of the digital valve controller,
casing mounted separate from the digital valve
controller, or mounted on the actuator mounting boss.
Supply and output pressure gauges may be supplied
on the digital valve controller. The output pressure
gauges can be used as an aid for calibration.
Connect the nearest suitable supply source to the
1/4 NPT IN connection on the filter regulator (if
furnished) or to the 1/4 NPT SUPPLY connection on
the digital valve controller housing (if 67CFR filter
regulator is not attached).
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