# Trigger Settings (Data Logger)

You can configure the start and stop triggers by using the trigger settings. Once a trigger occurs, the Data Logger starts or stops logging data for all open channels.

## Start on

The Data Logger offers the following types of start trigger.

Trigger Type Description
Immediate Starts logging immediately after you click Run.
Delay Starts logging after the period of time, in seconds, that you specify.
Rises above value Starts logging when the input signal rises above the specified value. The range for Value equals the input range you specified for the corresponding channel.
Falls below value Starts logging when the input signal falls below the specified value. The range for Value equals the input range you specified for the corresponding channel.
Enters range Starts logging when the input signal falls within the specified range. The valid range equals the input range you specified for the corresponding channel.
Leaves range Starts logging when the input signal falls outside the specified range. The valid range equals the input range you specified for the corresponding channel.

## Stop on

The Data Logger stops logging when one of the following three conditions are met:

• You click Stop.
• A buffer overflow occurs, that is, the aggregate number of logged samples exceeds the buffer size. The buffer size is 3,000,000 on the computer and 2,000,000 on mobile devices. If you choose to log data to a USB drive, the buffer size depends on the size of your USB storage.
• A stop trigger occurs.

The Data Logger offers the following types of stop trigger.

Trigger Type Description
No trigger Stops logging only when you click Stop or a buffer overflow occurs.
Duration Stops logging after the period of time, in seconds, that you specify.
$\mathrm{Maximum Duration}=\frac{\mathrm{Buffer Size}}{\mathrm{Number of Open Channels}\text{\hspace{0.17em}}×\text{\hspace{0.17em}}\mathrm{Sample Rate}}$
Rises above value Stops logging when the input signal rises above the specified value. The range for Value equals the input range you specified for the corresponding channel.
Falls below value Stops logging when the input signal falls below the specified value. The range for Value equals the input range you specified for the corresponding channel.
Enters range Stops logging when the input signal falls within the specified range. The valid range equals the input range you specified for the corresponding channel.
Leaves range Stops logging when the input signal falls outside the specified range. The valid range equals the input range you specified for the corresponding channel.
Number of samples Stops logging when the number of logged samples per channel exceeds the value you specify. The maximum value for Number of samples equals the buffer size divided by the number of open channels.