User's Guide ______________________________________________________________________
206 _________________________________________________________________ M210667EN-C
4.
The replacement unit must be mounted in the same way as
described in section Mounting Receiver Measurement Unit on page
124.
5.
Make sure that the enclosure is parallel with the support unit.
6.
Secure the fastening screws of the measurement unit carefully.
7.
Turn on the AC power switch (and also the battery backup switch,
if installed).
CAUTION
After replacing the measurement unit, fine alignment and calibration
must be carried out to establish normal operational conditions. For
details, see sections Fine Alignment on page 231 and Calibration on
page 232.
8.
Re-install the measurement head cover and lock it carefully.
9.
Close the interface unit and mount the upper interface unit cover
after the replacement, fine alignment, and calibration is finalized.
Replacing Transmitter Measurement Unit
LTM112
To replace the complete transmitter measurement unit, the AC power has
to be switched off first and then the measurement head cover has to be
removed.
1.
Remove the upper interface unit cover and open the interface unit
with the provided key.
NOTE
Switch the AC switch off, before you proceed with the next steps. In case
of the optional LTBB111, switch the battery backup switch off as well.
See Figure 40 on page 83.
2.
Loosen the three lock screws at each side of the measurement head
cover and carefully remove the cover from the measurement head.
See Figure 95 on page 140.
3.
The measurement unit is fixed with two fastening screws. Through
the mast adapter of the support unit, these two hex-socket screws,
size 4, can be reached. See Figure 78 on page 118.
4.
The replacement unit must be mounted in the same way as
described in section Mounting Transmitter Measurement Unit on
page 114.
5.
Make sure that the enclosure is parallel with the support unit.
6.
Tighten the fastening screws of the measurement unit carefully.