BRUEL & KJAER 1213 User Manual

DC power supply. An optional Mains
Power Supply (ZG 0199) enables the
Type 1213 to be powered continuously
from the mains and can be used as a
battery charger.
Operation
The Indoor Climate Analyzer has
three operating modes: "Display",
"Record" and "Replay /Plot".
Display Mode
Each time the instrument is
switched on, it automatically enters
the "Display" mode. Immediately af-
ter switching on, the Type 1213 un-
dergoes a short internal self-testing
routine in which the basic functions
such as the AID conversion, validity of
the program in the ROM and the
functioning of the RAM are checked.
Thereafter, data can be read directly
from the Display by selecting the de-
sired pushkey.
The selection of measurement data
for display depends upon the pushkey
selected. In most cases the measure-
ments are displayed instantly. Howev-
er, if either "Air Velocity" or "Humid-
ity" parameters are selected as soon as
the instrument is switched on, a delay
occurs during which the first measure-
ment takes place. During this initial
delay period the Display indicates
that the instrument is "MEASUR-
ING". Subsequent selections of either
"Air Velocity" or "Humidity" mea-
surements provide instantaneous dis-
plays of the last measured value.
In the "Display" mode it is also pos-
sible to obtain instantaneous air veloc-
ity measurements via the X-output on
the rear panel of the Type 1213.
Record Mode
The "Record" mode of the Type
1213 is used to select, automatically
measure and record data. The user
can choose between the four different
measurement periods by using the
"Recording Time" pushkeys. The
Type 1213 automatically spaces the
measurements equally throughout the
pre-selected measurement period.
Provided that all five different
transducers are connected to the In-
door Climate Analyzer, simultaneous
recording of all measurement data is
possible. If a measurement is selected
for recording when the relevant trans-
ducer(s) are not connected, "CON-
NECT TRANSDUCER" appears on
the Display. Thus, the operator can
ensure that the required transducers
are connected, before the recording
takes place.
Once the recording period has com-
menced the Indoor Climate Analyzer
automatically switches to a low power
mode
extending battery life. In this
low power mode the Display remains
blank and all LEDs with the exception
of the "Record" pushkey LED are ex-
tinguished.
It is possible to obtain data on the
Display whilst still recording, by
pressing the "Display" pushkey. The
requisite measurement can then be
obtained on the Display by selecting
the appropriate pushkey. In addition
to the data being measured, it is also
possible to obtain a read-out of the
elapsed measurement period.
If left in the activated state for of
four minutes without any pushkeys
being operated, the Analyzer automat-
ically reverts to the low power mode.
When the full recording period has
been completed the Indoor Climate
Analyzer remains in the low power
mode. However,
the LED on the "Re-
cord"
pushkey flashes to indicate that
recording and storage of data have
been completed.
Replay/Plot Mode
The third operating mode of the
Type 1213 is "Replay /Plot", which is
used to recall data stored in the Ana-
lyzer Memory. Stored data can either
be replayed on the Display, or output
to a graphic recorder via the rear pan-
el sockets on the Analyzer.
When replaying data on the Dis-
play, the user can either step through
all recorded data for a single parame-
ter, or alternatively, look at all data
recorded at one measurement interval.
Stored data are labelled with a "SAM-
PLE NO." and the Display automati-
cally alternates between sample num-
ber and recorded data.
When plotting data, the Type 1213
provides both zero and gain calibra-
tion signals. Plotting data from the
Type 1213 is particularly easy with
the B & K X-Y Chart Recorder, for
which special graph papers (QP 3571
and QP 3572) are available. However,
other X - Y Recorders and Level Re-
corders may also be used.
Applications
In workplaces, such as offices or
electronic assembly halls, where activ-
ity is predominantly sedentary, the
thermal environment often plays a
Fig. 12 Application of the Indoor Climate Analyzer Type 1213 in a museum
7

BRUEL & KJAER 1213 Specifications

General

Brand	BRUEL & KJAER
Model	1213
Category	Measuring Instruments
Language	English