![background image](http://html1.mh-extra.com/html/east-tester/et-2715/et-2715_user-manual_3438341011.webp)
8
Figure 2.2-1
2.3 Backlight Brightness Adjustment
To adjust the brightness of backlight, proceed as follows:
1.
Press
until the buzzer works, then the screen will display as shown in Figure
2.3-1:
Figure 2.3-1
2.
Press
and
to adjust the brightness of backlight.
3.
Press
to save brightness level,
will appear and then the calibrator
will enter into the work mode(Without pressing key for 5 seconds, the calibrator
will exit from the adjustment automatically).