To set your logger to start recording data, select Setup from the Logger menu. The setup options window is shown below.

Sample Interval (Total Recording Length): Select the sample interval from a predefined list of intervals.
Custom Interval: Add your own interval to the sample interval list.
Enable Data Rollover: Check this box to have the logger continuously record the data, overwriting earliest recorded data. When this box is not checked, logging is stopped when the logger memory becomes full.
Logging Control: Logging can start in three ways depending on the selection you make:
Logging starts when the Start button is pushed: Logging will start when the Start button is pushed for about 3 seconds.
Logging starts immediately when setup is complete: Logging will start immediately once the Continue button is clicked.
Logging starts at this time: Logging will start at the user specified time. There is no limit how far in the future you can set the logging to start.
Channels to Log: You can elect to disable unused logger channels. When a channel is disabled, its memory is allocated to the other channels, increasing the total logging time. The total logging time will be reflected in the Sample Interval window. Depending on the logger, some channels are required and cannot be disabled. Channels that can not be disabled are grayed out and can not be unchecked. For instance, in the picture above, the Temperature channel is required to record Realative Humidity, so the Temperature channel cannot be disabled. At least one channel must be enabled for logging.
User Information: Enter any text you like in this box. This field is used to identify the logger to the user. You can enter descriptive location, serial number, etc.
Alarm Setup: Click this button to open the Alarm Setup Window.