PCE Instruments PCE-CRM 40, User Manual

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need to change if not necessary.
2.3.2 Power Management
There are functions include screen backlighting time setting, auto-shut off time setting
and backlight brightness adjustment.
LCD backlighting time is set for 30 seconds in default, and the auto-shut off is set for 30
minutes.
Backlight brightness adjustment function has 3 optional levels, corresponding to the
dark, medium and bright. It is set in first level in default.