BERTHOLD TECHNOLOGIES LB 567, Руководство пользователя

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Chapter 4. Getting Started
MicroPolar 2 (++) LB 567 53
4.3.6 Installing the Evaluation Unit
Installation of the evaluation unit as described in chapter 4.2.2.
4.3.7 Connecting the HF Cable
Connect the horn/spiral antennas and the evaluation unit (sock-
ets M-Tx and M-Rx) with the antenna cables. The transmitting
antenna is connected to M-Tx below the belt, and the receiving
antenna to M-Rx above the belt.
Connect a reference cable to the reference sockets of the evalu-
ation unit (R-Tx and R-Rx). The reference cable should have the
same characteristics and if possible the same length as the total
of both antenna cables.
Hand-tighten all screwed connections of the HF cable (2 Nm =
0.2 kg/m)! Before tightening, carefully screw on the cable by
hand.
Caution! Threaded joint jams easily.
Install the signal and reference cable in the same manner (if pos-
sible, parallel), so they are exposed to the same temperature
(temperature compensation of ambient temperature on the an-
tenna cable; this ensures long-term stability).
Fix the antenna and reference cable after you have installed
them.
IMPORTANT
A steel pipe may protect the cable and keep signal and refer-
ence cable on the same temperature for an effective tempera-
ture compensation. Kinked cables falsify the results and make
the cable useless. The bending radius should not be less than
100 mm.
Check occasionally if the screwed connection is still properly
tightened. If the installation is exposed to vibrations, the screwed
connection may come loose and this may result in inaccurate
measurements or corrosion of the connections.
As long as the cables are not connected, the coaxial sockets have
to be covered immediately with plastic caps and the cable con-
nectors have to be protected by suitable provisions against mois-
ture and dirt.