Siemens SITRANS FUH1010PVDX, Руководство по эксплуатации, Страница: 126 / 308

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CQO:1010PVXFM-3 Section 5
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
5.4.2 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 trans-
ducer (e.g., C3) is still acceptable (but the least desirable) choice. Since these are simply recommenda-
tions not requirements, you can override the flow display computer and use any size, as long as the
mounting method accommodates the pipe’s diameter. The flow computer shows that your selection is
acceptable if it is able to calculate transducer spacing (Ltn).
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 size press
5.4.3 HOW TO SELECT A XDCR MOUNT MODE
The flow display 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 com-
pensation for flow profile distortion (crossflow) that could be the result of unfavorable application condi-
tions such as an insufficient upstream straight run. In addition, Reflect Mode supports the AutoZero
function, which sets the zero flow velocity automatically.
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: Direct Mount is recommended when using 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
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