CEM DT-613, Operation Manual

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5. Press to toggle showing the T1, T2, and T1-T2
(differential temperature measurement) in the primary,
secondary and tertiary display.
6. Press button to turn on the backlight. Press it
again to turn off the backlight. Press button for 3
seconds to start or exit Setup. (See "Changing Setup
Options.")
7. Press to scroll to the Setup option you want to
change. Press to increase the displayed setting.
8. Press to scroll to the Setup option you want to
change. Press to decrease the displayed setting.
9. Press to enter a Setup option. Press again
to store the displayed setting in memory.