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1010PVNFM-3A
Section 2
To select a Transducer Size:
To access the [Transducer Size] option list press
To move the cursor to the desired transducer size press
To select the transducer press
2.4.3 HOW TO SELECT A XDCR MOUNT MODE
The flow computer recommends the transducer mounting mode [Direct or Reflect]. In almost
all cases it will be Reflect, since this is the most desirable configuration. Reflect mode allows
you to mount the transducers on pipes that do not permit back or side access. Reflect mode
provides inherent compensation for flow profile distortion (crossflow) that could be the result
of unfavorable application conditions such as an insufficient upstream straight run. In addi-
tion, Reflect mode supports the AutoZero™ function, which sets the zero flow velocity auto-
matically.
Direct mounting may produce a stronger transducer signal and requires less mounting length
than Reflect mounting. This can be important if the liquid or pipe material exhibits high sonic
attenuation, thereby preventing operation in the Reflect configuration.
NOTE: We recommend using Direct Mount with Plastic pipes.
To select a Xdcr Mounting Mode:
To access the [Xdcr Mount Mode] option list press
To move the cursor to the required mounting type press
To store selection press
2.4.4 HOW TO USE THE SPACING OFFSET
After you select the mounting method, the flow computer checks your entries for pipe size,
transducer type etc. and then recommends a spacing offset. This is the first step in establish-
ing the correct distance between the transducers. Spacer bars and mounting tracks
utilize
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To select a Transducer Model:
To access the [Transducer Model] option list press
To move the cursor to the required transducer model press
To store your selection press
2.4.2 HOW TO SELECT A TRANSDUCER SIZE
When you move the cursor to [Transducer Size], the highlighted prompt at the top of the
display screen shows a list of recommended transducer sizes. For example
[Recommended
Xdcrs: D3, D2, D1, C1, C3].
The flow computer generates this list automatically based on
your pipe and your application data entries. The left-most transducer size (e.g., D3) is the
primary (most appropriate) choice. The right-most transducer (e.g., C3) is still acceptable (but
the least desirable) choice. Since these are simply recommendations not requirements, you
can override the flow computer and use any size, as long as the mounting method accommo-
dates the pipe’s diameter. The flow computer shows that your selection is acceptable if it is
able to calculate transducer spacing (Ltn).
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