Intek RheoVac 940 - Manual (Page 8)

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Figure 4 Maximum Cable Lengths
2.3 MOUNTING HARDWARE INSTALLATION
Î Check hardware. Verify that the probe slides
through the hot tap assembly.
Ï Check installation configuration. Make sure
the probe is parallel to the floor. (see Figure 3).
Ð Check installation clearance. Verify there is a
probe insertion clearance of 4 feet from the
pipe wall.
Ñ Install the mounting hardware. Drill a 1½”
through hole and weld the thread-o-let onto
the condenser vacuum pipe (See Figure 3).
Thread the hot-tap assembly into the thread-
o-let. Use thread tape or pipe dope to seal the
connection.
Ò It should be convenient to apply a force of
about 23 lb to remove or replace the probe
under plant operating conditions.
2.4 TRANSDUCER INSTALLATION
Î Check proper installation direction. The transducer has a directional arrow on the tag and/or
etched into a metal part. Before installing the unit, note proper flow direction. This is
important to instrument operation.
Ï
Check serial number. If more than one RheoVac unit has been purchased, make sure the
complete serial number of the transducer matches the complete serial number of the separate
electronics unit. The transducer and electronics are a matched set. Mismatched components
will result in erroneous readings.
Ð Verify stop clamp location (see Figure 6). A stop clamp is attached to the probe as an
indication of its insertion depth. It is important this stay in place so the sensors are in the
correct location and ensure the probes do not contact the opposite pipe wall. The clamp’s
location was determined based on your pipe diameter, as shown in SECTION 6.2, and is
marked with a groove on the probe’s shaft. Refer to this mark if the stop clamp is
inadvertently moved.
Ñ Inspect the transducer probe tips. Be sure wetted surfaces are clean before installing. If
cleaning is needed, use a damp cloth wetted with alcohol and wipe dry using a soft, lint-free
cloth. Do not immerse probe in liquid alcohol or any other liquids.
Ò Install the transducer. The instrument should be mounted through the pipe wall using the hot-
tap assembly. The transducer installs so that the two probes are side-by-side across the gas
stream. The transducer has a flow directional arrow on the transducer tag and/or marked into
the fitting. When installing under vacuum, do not allow the clamp to "slam" against the seal
nut upon opening the valve. Grasp the transducer shaft firmly before opening the ball valve.
Allow the transducer to slide through the valve by controlling the amount of grip on its shaft.
Special installation instructions, if any, will be noted in SECTION 6.