13
1.Measurement screen
As shown in the figure：
The function buttons on the screen and the display of each region are as follows:
Set button
：
Press this button to enter the parameter settings interface, specific in the
chapter.
Clear button
：
Press this button to clear the test record in memory.
Display history data button: Press this button to display the measured historical data.
Display the symbol of the cylinder: touch this button can be cycle
switch.
PD Measurement button: Touch this button to enter the PD Measurement screen.
Measurement mode switch: Touch this key to circularly switch measurement mode.
The show step of the Sphere and cylinder: Touch the key to circularly switch
the step.
VD display: Touch this key to circularly switch VD value.
Count the times of left and right measurement: "L" means "left".
The second letter R represents the measurement of REF. The third is the times of measurement.
The fourth letter K represents the measurement of KER. The last is the times of measurement.
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