3700 Sagamore Parkway North . PO Box 5729 . Lafayette, IN 47903 USA . Ph: 765-423-1505
ELECTRONIC VOICE REACTION TIMER
4
4
Latching/Sequential Mode
If the Latching/Sequential Mode is selected the next message to be displayed is the following;
VOL QUIT RUN
If the microphone sensitivity settings are to be changed, the button directly under the
VOL
should
be pressed. If you wish to leave this mode, press the button under
QUIT
. If the mode and settings
are satisfactory, and you wish to begin testing, press the button under
RUN
.
If the sensitivity is to be adjusted, the following screen will appear on the display;
PICK MICROPHONE
MIC1 MIC2 OK
Select the microphone that you wish to adjust by pressing the button underneath
MIC 1
or
MIC 2
.
This will bring up a new screen in which the current sensitivity setting is displayed in percentage
of maximum sensitivity and the following choices will be displayed;
INC DEC OK
Pressing the
INC
button will increment the sensitivity in 1% increments. If the button is held down,
the sensitivity will increment at a moderate rate for the first five increments, and then will
increment at a much faster rate, until the button is released. The same is true for the
DEC
button,
except that the sensitivity will decrement. Once the sensitivity setting for that microphone is at the
desired value pressing the
OK
button will bring you back to the
PICK MICROPHONE
screen.
Pressing the
OK
button will take the user back to the previous screen.
If all the settings are acceptable, pressing the
RUN
button will allow testing to begin. The LCD
displays the following screen;
REAC TIME=0.000S
VOL QUIT
At this point, a trigger input from microphone 1 will cause four things to occur. First, Relay 1
contacts will close and latch and the green indicator LED for input
mic 1
will turn on. At the same
time, Relay 3 contacts will close and the reaction time display will start running. Pressing the
QUIT
button at this point will open relay 1 and 3 contacts, shut off the green LED, and reset the
clock. If the
QUIT
button is not pressed, the clock will continue to run until a input
mic 2
trigger is
received. At this point, Relay 2 contacts will close latch while Relay 3 contacts open and the clock
display stops running. Again, pressing the
QUIT
button at this point, will open all closed relays,
turn off the indicator LEDs, and reset the clock display. If the
QUIT
button is pressed again, you
will leave this mode of operation, and be taken back to the latch mode selection screen.
When in this mode, the microphone sensitivity can still be adjusted, but only when no relays are
closed. Once a relay closes, the
QUIT
(reset) button must be pressed before sensitivity
adjustments can be made.
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