Schumacher PST-900X - Manual (Page 10)

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ADJUST THE DISPLAY BRIGHTNESS
Hook the tester up to a vehicle battery. 1.
the tester defaults to the BatterY test display. Press the FOrWard 2.
button five times to get to the BRIGHTNESS display.
Press eNter and the display will show BrIGHtNess adJust. Press
3.
the FOrWard or BaCK buttons to adjust the brightness of the display.
Press eNter and the display returns to BatterY test.
4.