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Mechanical Installation
January 2023
5. Only use slings with ratings that exceed the weight to be lifted. Reference
6. NEVER allow the slings to contact the electronics enclosure or the
7. Once the lifting operation is complete, reattach and secure the electronics
8. NEVER apply shock loads to the meter. Always lift the meter gradually. If
2.5
Mounting requirements in heated or
cooled pipelines
The ambient operating temperature of the 3812 Liquid Allocation electronics (i.e.
Flameproof enclosure and Intrinsically safe base enclosure) is -40 °C to +60 °C (-40
°F to +140 °F).
If the meter is installed into a pipeline which is heated or cooled outside this
temperature range it is necessary to remove the Transmitter Electronics
enclosure from the meter body (i.e. Spool piece acting as process fluid conduit)
and mount it next to the meter body on a pipe stand or other rigid structure. The
process temperature must also not exceed the operating temperature range of
40
your company's standards for safety factors that must be included when
calculating the load rating.
transducer shrouds. Damage to the meter may occur. If the slings do come
in contact with the electronics or the shroud, temporarily remove the head
from the meter during the lifting operation (remove the four bolts holding
the enclosure to its base and unplug the cable from the Acquisition Module.
Two screws hold this cable in place.) Use a spreader-bar on the sling (see
Figure
2-11) to prevent contact with the electronics or the transducer
shroud.
cable to J3 on the Acquisition Module, return the electronics enclosure to its
original position, replace the bolts, and secure the enclosure in place. Lifting
the meter with the upper enclosure installed but with out the bolts installed,
may cause the electronics to fall and cause personal injury or electronics
damage.
Figure 2-12: Incorrect sling attachment
shock loading ever occurs, the slings must be inspected per manufacturer's
procedures prior to being placed in any further service.
Installation manual
00825-0100-3812
Rosemount 3812 Liquid Ultrasonic Flow Meter
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