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Figure 1.
Instrusive Probe Installation.
SECTION 2
!
INSTALLATION
2.1 TRANSDUCER
.
IMPORTANT:
All transducers have a directional arrow on the tag
and/or etched into a metal part. Before installing a sensor, please note
proper flow direction. This is critical to sensor operation.
.
IMPORTANT:
If you have more than one
Rheotherm
unit, make sure
the complete serial number of the transducer matches the complete serial
number of the electronics module. The transducer and electronics are a
matched set. Components with different serial numbers cannot be
interchanged. The transducers have no user serviceable parts, so do not
try to disassemble, as permanent damage may result.
The transducer style supplied with your meter is listed in the model code number in SECTION 6.
Proper installation of the sensor is necessary for achieving accuracy and repeatability. Installation
suggestions for each type of standard transducer are given here. For custom transducer installations,
refer to
CUSTOM INFORMATION — SECTION 6
.
Be sure wetted surfaces are clean before installing. If cleaning is needed, use non-residue solvent and wipe
dry. If the sensor has a connector box, keep moisture out. Make sure the lid is tightly sealed and, if
supplied, the gasket is in place. Seal conduit lines at the connector box if conduit lines can become wet.
1.
Intrusive Probes —
.
IMPORTANT:
Recommended straight run for best accuracy is 20
diameters upstream and 10 diameters downstream.
Probe type flow switch/monitors should be handled with sufficient care so as not to bend or
otherwise damage the probes. Ensure that the temperature and pressure limits of the
instrument are compatible with your application. Be sure wetted surfaces are clean before
installing. If cleaning is needed, use a non-residue
solvent and wipe dry. The instrument should be
mounted through the pipe wall using a thread-o-let,
flange fitting or hot-tap, with the standard being a
1" NPT. Check to ensure that the probes are long
enough to be well immersed in the flowing fluid.
Generally, the probes are sized so the tips extend ¼
to 1 inch beyond the pipe center line when properly
installed. There are exceptions to this in certain
applications; see
CUSTOM INFORMATION
(SECTION 6
) as it applies.
Proper alignment of the sensor with flow is
important; the flow direction is indicated on the
