Varec 7532, Installation And Operation Manual

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17
7532 Mounting
3.4 Installation instructions
3.4.1 Mounting kit
In addition to the tool needed for flange mounting, you will require the following tool:
• 4 mm Allen wrench for turning the housing.
3.4.2 Installation in stilling well
Optimum mounting position for 7532 RTG
Recommendations for the stilling well
• Metal (no enamel coating, plastic on request).
• Constant diameter.
• Weld seam as smooth as possible and on the same axis as the slots.
• Slots offset 180° (not 90°).
• Slot width respectively diameter of holes max. 1/10 of pipe diameter, de-burred.
Length and number do not have any influence on the measurement.
• Select antenna extension as big as possible. For intermediate sizes (e.g. 180 mm)
select next larger antenna extension and adapt it mechanically. Maximum gap allowed
between the antenna/horn of 7532 RTG and the inside of the stilling well is 5 mm (3/
16").
• The antennna extension of the 7532 RTG is mounted with defined pressure.
It is strongly recommended
not to dismantle this antenna
.
• Dimensions of a nozzle for manual gauging must be adapted to the dimensions of
the horn antenna used, compare to page page 23.
Stilling wells with pipe expansion
• When using a 7532 RTG, a gradual pipe expansion from DN150 to DN200 / DN200
to DN250 / DN250 to DN300 is acceptable. In such cases, the top end of the piping
must have a minimum length of 0.5 m in front of the expansion (see table on page 18).
Ideally, a dip socket is used for this.
• Greater expansion of the piping (e.g. DN150 to DN300) is possible if the top end of
the pipe is extended accordingly (see table on page 18).
• Avoid pipe expansions at right angles.
Standard installation
When mounting in the stilling well, please
observe engineering tips on page 14 and
the following points:
• After mounting, the housing can be
turned 350° in order to simplify access to
the display and the terminal
compartment.
• planar axis vertical to flange.
• Measurements can be performed
through an open ball valve without any
problems.
L0
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FM
R5
32
xx
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0-
00
-en
-0
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