Michell Instruments Pura 2-Wire, Руководство пользователя

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Pura 2-Wire/3-Wire/Digital Transmitter
User’s Manual
Michell Instruments 9
INSTALLATION
2.6.3 Pura SEN - Direct Pipeline Connection
The transmitter may be directly mounted into a pipe or duct
.
CAUTION: Do not mount the transmitter too close to the
bottom of a bend where any condensate in the pipeline might
collect and saturate the probe.
The pipe or duct will require a ½” VCR male process connection thread to match
the transmitter body thread. Fixing dimensions are shown in
Figure 12. For circular
pipework, to ensure the integrity of a gas tight seal, a mounting fl ange will be required
on the pipework in order to provide a fl at surface to seal against.
Procedure
The following procedure must be carried out by competent
personnel.
1. Ensure that the red protective cover has been removed from the
tip of the transmitter.
WARNING: Under no circumstances should the fi lter guard be
handled with the fi ngers.
2. After fi rst checking that the pipeline has a wide enough bore to
accept the transmitter’s process connection, screw the transmitter
into the pipe. Tighten enough to obtain a gas tight seal. (Torque
will depend upon the pipeline material.)
Michell Instruments recommends the use of Swagelok
®
retained gasket assemblies,
containing silver plated, stainless steel ½” VCR gaskets, when connecting the Pura into
a gas line.
NOTE: Do not overtighten or the thread on the pipework may be stripped.
(1.9”)
1
1
2
2
3
3
Optional
display
(available
on request)
Optional
cable
(available
on request)
j
j
48mm
Figure 12
Transmitter Mounting - Pipe or Duct