70
Chapter 3 Working with MultiLab
1. Select the triggering sensor in the
Based on sensor
drop list
2. Choose one of the following from the
Type
options:
•
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 occured:
The trigger level set for this option is actually a threshold setting.
Each time the threshold is crossed, TriLog 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.
Note
: The trigger acts on analog measurements only (not on the
distance sensor). The trigger condition must be fulfilled for at least
300
µ
S.
•
Control Level
- The Control Level trigger allows you to create
an automatic sense and 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 pre-defined threshold (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, but 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.
3.
Select the trigger level in the
Level
drop list
4. Click
OK
Note
: When you turn off TriLog, it will save the setup for the next
session.
