13. Wall Holders (Accessories)
Various types of wall holders are available as optional accessories. They allow to store the 6150AD or to
use it as a stationary meter.
When operating the 6150AD in a wall holder, for example as a room monitor, you have to consider the
following :
The direction of incidence of the radiation to be measured will not be the preferential direction
(which is perpendicular onto the front side), but mostly onto the face with the LCD. Although this
different direction will not make a big difference, particularly at higher radiation energies, it means a
deviation from the original specification.
Backscattering effects from the wall may affect the reading.
Currently the following wall holder types are available:
Wall Holder 761.8: The main purpose of this holder is simply to provide a clear storage place for the
6150AD, for example in a laboratory. If the 6150AD shall be operated in that holder, it must be
supplied by its own battery.
Wall Holder with AC Adapter 761.13: This holder allows to permanently operate the 6150AD from
230V mains instead from its battery. It comprises a standard AC adapter the output of which is
connected to a pair of contacts reproducing the shape of a 9V battery. You have to remove the battery
cover and the battery to insert the 6150AD into that holder. Once inserted, the 6150AD is
automatically connected to the AC adapter.
Gamma Alarm Station 859.x: This is an electronic device making dose rate alarms better noticeable,
for example by a flashlight or a powerful loudspeaker. There are various models differing in output
features. Details can be found in the separate operating manuals for that device.
Probe Multiplexer 861.x: This is also an electronic device allowing to connect several probes to only
one 6150AD. The Probe Multiplexer selects the individual probes either automatically, or manually,
or according an external computer command. With this device you may monitor several locations
with several probes and one central 6150AD. However, that monitoring will not be simultaneously
for all locations, but for one location after the other according to a time-slice method. For this device
there is also a separate operating manual.
Page 42
Operating Manual 6150AD
03/2004
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