17
b. In such mode, moving F3 left measuring key is to adjust automatic
power-off time, which will be shown on the screen (time range: 0.5-3
minutes with the 0.5-minute interval).
c. Moving F10 right measuring key is to adjust LED brightness and
the corresponding LED current value (the bigger the LED current
value, the brighter the LED lamp shines) is shown on the screen.
(Current value range: 0.5-5 mA with the interval of 0.5 mA).
d. When the two above are well set, another pressing of the Function
Transition Key can save the set values and the device is again into
the measuring mode.
5.7 Setting of Measurement precision
a. Under PD or VD measurement mode, Slide F3 left pupil
measuring key to left end, and slide F10 right pupil measuring key to
left end, then press F4 Function Transition key continuously 5 times
till the screen shows image of “------”Slide F3 left pupil measuring
key to the right end, press F4 Function Transition key to set the
precision.
b. Under this mode, sliding Left Pupil Measuring Key can set display
precision to be 0.1, 0.2 or 0.5 for PD being set from 45to 82mm and
0.5mm for others. When the precision is set, press Function
Transition Key again to save, then the machine returns to the
measurement mode.