Emerson Process Management 3410 Manual Do Utilizador

3-9000-743 Rev S

June 2013

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, 

. 

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.