Figure 3 Keypad
1 Range key: Selects the
measurement range (e.g., LR or
HR).
Push and hold for 3 seconds to
enter or exit menu mode.
In menu mode, scrolls up or
increases the value of the selected
digit.
4 Backlight key: Sets the backlight
to on and off.
In menu mode, scrolls down or
decreases the value of the selected
digit.
2 Zero key: Sets the zero value
before a measurement.
In menu mode, goes back one
menu level or moves the cursor to
the previous digit.
5 Read key: Starts a sample
measurement.
In menu mode, selects the menu
option shown or moves the cursor
to the next digit.
3 Power key: Sets the power to on
and off.
Push and hold for 5 seconds to
reset the instrument. The
calibration is not deleted.
English 9
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