KROHNE BM 90 EN - Manual (Page 11)

11
2.2. Transducer Mounting
The transducer can be supplied as ’standard’ or mounted in a Teflon faced flange for applications requiring chemical
compatibility. The figure below shows the dimensions:
20
170
Isolation Kit
Fit as shown
20
21
72
100
10m cable
6.9 dia
50
M20 x 1.5
95
Dia to suit flange selected
No. & size of bolts
to suit flange selected
Bolt hole PCD to suit
flange selected
DIA
DIA
DIA
Standard Flanged
An isolation kit is provided with each transducer to min-
imise any ringing transmitted through the mounting struc
ture.
The transducer must be mounted perpendicular to the
monitored surface and, ideally, at least 0.5 metres above
i t .
The transducer has a 10 inclusive conical beam angle
at 3dB and must be mounted with a clear unobstructed
sight of the liquid to be measured over the complete
measurement range.
The transducer is provided with integral cable which can
be extended up to 300 metres using a suitable junction
box and RG62AU cable. The temperature compensated
transducer requires an additional single core screen
extension.
The extended cable should then be terminated directly
into the instrument.
Transducer cables and temperature compensation
cables can be run together but should be separated from
power cables by at least 150mm and preferably installed
in their own earthed steel conduit.