3.4.2. The Self-Test Routine
Each time the
Indoor Climate Analyzer Type 1213 is switched on, a short self-test rou-
tine is
automatically initiated. During this test - - -
TESTING
--
- is displayed. Pro-
vided that no
faults are detected during the self-test routine SELECT TRANSDUCER
appears on the Display on completion
of
the routine.
The
self-test routine checks the operation
of
basic functions such as the
AID
conver-
sion,
validity
of
the program in the Read Only Memory (ROM) and the functioning
of
the
Random Access Memory (RAM)
for
data storage. Should a fault be discovered during
the
self-test program,
an
error message such as
RAM
ERROR
appears on the Display. If
an
error
message appears, the Analyzer should be switched
off
immediately and all
sources
of
power removed. For repair please contact the local Bruel & Kjrer represen-
tative. The
Analyzer should then be serviced before
it
is used again. Under no circum-
stances
should repair be attempted by persons not qualified in the service
of
electronic
instruments.
3.4.3.
Selection
of
Measurement Units
The
Indoor Climate Analyzer is preset
for
automatic selection
of
Sl
units. Measurements
can however,
also be
displayed*
and output in Imperial units by pressing the
"120
h/Units"
pushkey. Pressing this pushkey a second time changes the measurement
units back
to
Sl.
3.5. OPERATING MODES
3.5.1. Display
24
Control
of
the Indoor Climate Analyzer is achieved using the pushkeys on the front panel
of
the instrument.
In
many circumstances the desired operation can be achieved by
activating a single pushkey. However, in some circumstances a sequence
of
pushkeys
must be activated. Flow charts showing these push key sequences are given in Figs.
3.
7
to
3.1
0.
The operation
of
the instrument is further explained in the following sections.
More details regarding specific types
of
measurement are given in Chapter
4,
and in-
formation on connection
to
other Bruel & Kjrer instruments
for
graphical recording is
given in Chapter
5.
The Type 1213 has three different operating MODEs:
"Display"
"Record"
"Replay
/Plot"
Each operating MODE can be selected by pressing the appropriate pushkey and a Light
Emitting Diode (LED) in the
push~ey
indicates the current MODE
of
the Analyzer.
The
"Display" mode is selected automatically whenever the Analyzer is switched on. This
mode is used for obtaining displays
of
the last measured data from the various Trans-
ducers. The
"Display" mode can also be operated while the Analyzer is in the "Record"
mode, without affecting the data being stored in the Analyzer Memory. For details
of
pushkey sequences see Fig. 3.7.
* It is not possible to obtain a radiant temperature asymmetry
bar-graph
display in Imperial units.
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