3.
OPERATION
3.1. PRELIMINARY
3.1.1. Environment and Handling
3.1.2. Mounting
16
The
Indoor Climate Analyzer Type 1213 is a readily transportable instrument designed
to
operate in the temperature range
+5°
to
+40°C
(+41° to +104°F) and may be operated
in conditions of up
to
90%
relative humidity (non-condensing) at 30°C. All Transducers
can be operated in ambient temperatures down to
ooc
( 32°F), while the
Air
and Surface
Temperature Transducers can be operated in ambient temperatures down
to
-20°C
(-4°F).
The instructions relating
to
power sources must be observed.
WARNING: If the external power source voltage is lower than the battery voltage the
diodes in the instrument
will draw current from the batteries. If in doubt, remove the
batteries.
Apart
from these, no special handling precautions are necessary
for
the Type 1213 itself.
However, the Transducers should be treated with care and kept in the Transducer
Carry-
ing Case
KE
0234 when they are not being used.
For
valid measurements using the Humidity Transducer MM 0037 the
mirror
surface
within the Transducer must be kept clean. For this reason the
mirror
is enclosed in a
protective
shield. However, from time to time, the
mirror
surface should be checked and
if
necessary, carefully cleaned using a
soft
cloth moistened with alcohol.
After
cleaning,
ensure that all traces
of
the cleaning agent have been removed from the
mirror
before
taking any measurements.
Radiant temperature measurements may
also be adversely affected by dust
or
dirt. For
this reason, the surfaces
of
the Radiant Temperature Asymmetry Transducer MM 0036
are enclosed within thin polyethelyne
Radiation-
Transparent Windshields, which also
provide protection from air velocity fluctuations. These Windshields should be replaced
when they become scratched
or
dirty. A set
of
16 Windshields UA
0851
is supplied with
the Radiant Temperature Asymmetry Transducer.
The 1213 is used free-standing on its four
plastic feet
or
tilted by using the metal stand
attached
to
the front pair
of
feet. The instrument should be kept away from the Trans-
ducers during measurements so that the
operator's
presence does not influence the
measurements.
The
Analyzer is also designed to fit into the standard 19-inch
BrOel
& Kjcer Module Sys-
tem. For further
details consult the
BrOel
& Kjcer product data sheet on Cassette, Cabinet
and Combining Systems.
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