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Reference, Installation, and Operations Manual Section 3: Installation
3-9000-743 Rev S June 2013
Mounting requirements for heated or cooled pipelines 53
3.3.2 Mounting requirements for heated or cooled pipelines
The ambient operating temperature of the Daniel Mark III electronics (i.e. Flameproof enclosure
and Intrinsically safe base enclosure) is -40
o
C (-40
o
F) to +65
o
C (+149
o
F). If the meter is
installed into a pipeline which is heated or cooled outside this temperature range it is necessary
to remove the electronics housing 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. Extended
length transducer cables (P/N 2-3-3400-194, 15 ft. long) shall be used to connect the Daniel
Mark III electronics to the transducers installed in the meter body. The process temperature
must also not exceed the operating temperature range of the transducers. T-11, T-12, and T-21
transducers have an operating range from -20
o
C (-4
o
F) to +100
o
C (+212
o
F). T-22 transducers
have an operating range from
-50 °C to +100 °C (-58°F to 212 °F).
3.3.3 Accessing the Daniel 3400 Series Ultrasonic Flow Meter
components
Should you need to access the Daniel 3400 Series Ultrasonic Flow Meter electronics in the field
(i.e., check or replace boards, change switch settings, or replace transducers), follow the
instructions below. Also, see Section 3.5.
Figure 3-8 Daniel Mark III Ultrasonic Gas Flow Meter
The transducers are installed in matched pairs. Do not split-up a transducer pair. Also, if a
transducer pair is moved from one chord position to another, the transducer pair’s delay
time and delta delay time configuration parameters must be properly re-configured.
Upper Housing
Base Enclosure and
Transducer Cables
Meter Body and
Transducers