GRAPHTEC GL840 Quick Start Up Manual page 14

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4. Push the [MENU] key and open the "DATA" menu.
Push the [MENU] key. Next, move the cursor to the "DATA" in the "MENU"
at the top.
5. Set the sampling interval to "1s".
Move the cursor to "Sampling" and then select "1s".
6. Set the Data Recording Medium to "SD memory card".
Here we will use the name "TEST" folder to be created in the internal
memory (SD1), and then set the recorded data to be placed inside the
"TEST" folder.
(1) Move the cursor to the File Name parameter and then push the [ENTER]
key.
(2) Move the cursor to the <SD1> item in the following screen, push the
[ENTER] key.
(3) The data save destination box shown in the following screen opens.
In the data saving destination box, set the SD1 as the Record Medium.