Fourier MultiLogPRO User Manual page 68

2. Choose one of the following from the Type options:
a)
b)
c)
d)
Note: The trigger acts on analog measurements only (not on the distance sensor).
The trigger condition must be fulfilled for at least 300μS.
e)
f)
3. Select the trigger level in the Level drop list.
None - Trigger is disabled
Above level - Start logging only once the measured
value is higher than the trigger level.
Below level - Start logging only once the measured
value is lower than the trigger level.
Event Recording - This function enables you to
record the exact time and date at which a certain
phenomenon occurs: The trigger level set for this
option is actually a threshold setting. Each time the
threshold is crossed, MultiLogPRO will record the
exact time and date of the occurrence, and will
continue to do so until the desired number of samples
has been obtained.
Control Level - The control level trigger allows you to
create an automatic sense & control system. This
means that you can connect a sensor measuring a
certain phenomenon (for example, temperature) and
connect a device that will start operating when the
recorded data from the sensor falls above or below a
certain level (for example, a fan that will start
operating when the temperature measured by the
sensor rises above 30°C). This function requires the
use of a splitter cable and a control sensor. The cable
divides each input into a sensor cable and a controller
cable. After setting the control level and starting the
data logging process, the sensor will sample and
record the data as usual. However, when the
measurement from the sensor rises above the
predetermined threshold value, the controller cable
will send a pulse of 5V to the control sensor, and will
continue to do so until the sensor measures a value
below the threshold level. When receiving the 5V
pulse, the control sensor will close/open a relay
capable of switching 110/220V to any load.
Time delay - This trigger type enables you to set a
timer that will start the logging after a predetermined
amount of time. After setting the trigger to Timer
Delay, click the down arrow on the Level combo-box,
and select from the 17 different time options. The
timer will start its countdown when you click RUN, and
the actual recording will start once the countdown has
ended.
Chapter 2 MultiLab Software 59