Onicon F-2600 Manual de usuario descargar pdf (Pagina 27)

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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 27

2.4 FLOW METER INSERTION

The sensor head must be properly positioned in the pipe. For this reason, it is important that

insertion length calculations are carefully followed. A sensor probe inserted at the wrong depth

in the pipe will result in inaccurate readings.

Insertion ow meters are applicable to pipes 2" and larger. For pipe sizes 10" and smaller, the

centerline of the meter’s sensing head is located at the pipe’s centerline. For pipe sizes larger than

10", the centerline of the sensing head is located in the pipe’s cross section 5" from the inner wall

of the pipe; i.e., its “wetted” depth from the wall to the centerline of the sensing head is 5".

Insertion ow meters are available in two probe lengths:

Standard Probe conguration is used with most ow meter process connections. The length, S, of

the stem is 29.47".

12-Inch Extended Probe conguration is used with exceptionally lengthy ow meter process

connections. The length, S, of the stem is 41.47".

Use the Correct Insertion Formula

Depending on your ow meter’s process connection, use the applicable insertion length formula

and installation procedure as follows:

• Flow meters with a packing gland type connection (NPT or anged) congured with an

insertion tool, follow the instructions beginning on page 29.

• Flow meters with a packing gland type connection (NPT or anged) without an insertion tool,

follow the instructions beginning on page 32.

WARNING

An insertion tool must be used for any installation where a ow meter is inserted under pressure

greater than 50 psig.

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Onicon F-2600 Manual de usuario Pagina 27