Sequoia LISST-200X, Руководство пользователя

Страница: 24 / 112

LISST-200X Introduction & Quick Start 16 LISST-
200X User’s Manual
less than the minimum permitted the value will be changed to the
minimum and the text will turn red.
The LISST-200X measures internally at ~20 Hz, but the data cannot
be stored to the data logger at this rate. The individual measurements
are averaged into a sample, and it is this sample average that is
stored at a maximum sample rate of 1 Hz. For the example shown
above, the instrument is set to sample in the Fixed Sample Rate mode
at a 1 Hz rate with 10 measurements per average. This average is
obtained in 0.53 seconds.
Step 12: Setting
Start Conditions After selecting the sampling schedule, the start and stop conditions
can be selected. Choose the
Start Condition tab.
There are five options: Depth, Time, External Mechanical Switch,
External Digital Input, and Time Delay. Select the mode by clicking on
the button next to its label. Select the correct parameters as required.
For this example let’s select the External Mechanical Switch Start
Condition.
AutoStart If the AutoStart check box is selected, the LISST-200X will start the
sampling program when power is applied to the instrument.
NOTE: for
AutoStart to detect the application of power, all power sources
(including the USB cable) must first be disconnected for at least 6
seconds.
If AutoStart is not selected the user must select the ‘Run
Sample Program’ button from the instrument status bar or send the
‘GO’ command to start the sampling programing after applying power.
Step 13: Setting
Stop Conditions Similarly, the Stop conditions can also be selected. Click on the Stop
Condition Tab to open the Stop Condition window. The available stop
conditions are: Depth, Time. External Mechanical Switch, External
Digital Input, Fixed number of Samples, and Memory Full/Battery Low