Denso BHT-6000 - Manual (Page 42)

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Chapter 2. Getting Started the BHT-6000 and System Mode
2.4.3 Adjusting the LCD Contrast & Beeper Volume,
and Displaying the Battery Voltage Level
[ 1 ] Adjusting the LCD Contrast & Beeper Volume
While holding down the M1 key, press the PW key, and the following screen will
appear on the LCD. This screen will disappear if no keys are pressed for five seconds.
(The current selection is reverse-displayed.)
LCD CONTRAST
BEEPER VOLUME
Adjusting the LCD contrast
You can adjust the LCD brightness to eight contrast levels.
1) Use the F5 and F6 keys to select the LCD CONTRAST line.
2) To decrease the contrast, press the F7 key; to increase it, press the F8 key.
Adjusting the beeper volume
You can adjust the beeper volume to four levels from OFF to MAX.
1) Use the F5 and F6 keys to select the BEEPER VOLUME line.
2) To turn down the volume, press the F7 key; to turn it up, press the F8 key.
After making the above setting, either press the ENT key or press no key for five
seconds, and the new setting will be fixed and the above screen will disappear.