KROHNE BM 70 M - Manual (Page 26)

26 BM 70 M
7.3 Field assembly
• When the BM 70 M needs to be field assembled, all required parts are included with the
supply (stud bolts, washers, etc.).
• If supplied loose, bolt the waveguide window (flange assembly) or the distance piece to the
BM 70 M. Tightening torque for the 4 Allen screws M (key size SW 5 mm): max. 8 Nm ~ 0.8
kpm.
• Note: The upper Teflon plug must be absolutely dry and clean! Moisture and dirt will
negatively affect functionality of the BM 70 M!
• Bolt antenna and antenna extension together: torque for the 3 stud bolts: max. 8 Nm ~ 0.8
kpm.
•
Do not on any account detach screws H!
7.4 Materials of construction
Check the materials of the antenna, extension, flange, gaskets, and PTFE (contained in all
versions) for compatibility with the product!
7.4.1 Signal converter
Housing stainless steel W 1.4435 (or 1.4539) with electrostatic powder coating.
Sight window borosilicate glass
distance piece (for
high-temperature version
up to 250°C (482 °F)
upper Teflon plug
O-ring
lower Teflon plug
O-ring
BM70 A
connecting flange
antenna extension
antenna
M
H
M
signal converter