12
ZK840 Grading Application User Instructions
Introduction
2.4.1 Escaping or exiting from a menu
In any menu you will have either
UP
or
ESC
keys listed on-screen.
If
ESC
is listed use it until it disappears then use the
UP
key until you are asked if you
want to save any changes or not. Highlight your choice and press
ENTER
to accept.
The indicator will reboot and return to the startup screen.
2.5 Adjusting screen contrast
To adjust the screen contrast press and hold the middle key on the left side of the
ZK840 and repeatedly press the
SAMPLE
key to increase contrast or the
TARE
key to
decrease the contrast. You may need to press the key many times until the change is
visible.
2.6 Touch screen calibration
If you need to calibrate the touchscreen, press and hold the top key on the left side of
the ZK840 on powerup and the touch calibration screen appears. Follow the prompts
to calibrate the screen.
