TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N
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4.3 WORKING WITH “OPTICAL” CHANNEL.
Connect IR sensor ST131.IR to the “I/O” socket of the main unit.
Click in start MENU the "OPTICAL" channel. When the initial selection of that channel the screen
information
will
corresponds
to
the
FULL
RANGE
mode.
Pressing the "REM.CTRL" provides rapid transition to a low-frequency part of the spectrum display in
the time domain (see section 3.8). This representation is optimal for the analysis of low-speed data
signals transmit. This type of signal is typical, for example, for remote controls. Because of a considerable
spread of time parameters of these signals new contextual button
is added which allows the
selection of the maximum storage of time samples (sweep). Available values are 0.1, 0.8 , 3.2, 13 , 52
and 208 ms. Increasing of this value slows down the drawing time of oscillogram and with maximum
values of device reaction to the button pressing slows down up to one second.
Technique of signals identifying in the rest part of the spectrum is similar to "RADIO" and
"WIRE” channels.
In locating the source of infrared radiation inspect premises with given radiation pattern of IR
sensor (30°) and presumably a fairly narrow focus diagram of IR signal emitter.
ADDITIONAL RECOMMENDATIONS
Specificity of infrared STM is the need for "direct visibility" between the transmitter and the
infrared receiver. Therefore, in the indoor transmitter radiation path may pass outwardly through the
window openings or from them (the transmitter is mounted directly into a window frame). With these
features, the search of danger signals should be start from the windows of the room. To find the STM
installed in window frames use a SPECIAL MONOPOD or tripod (see section 1.3.5.1.). Installing the IR
sensor on a tripod is made with respect to the direction of the receiving part of the sensor to the side
of the room.
