KYORITSU 4300 - Manual (Page 16)

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(3) The measured voltage is displayed on the LCD.
Take the reading without pressing the Test button. The
instrument judges DC or AC and shows “DC” or “AC” sign on the
LCD.
* When negative DC voltages are detected at the H+S(C+P)
terminal, the negative polarity sign “-“ appears to the left of the
measured value.
* The LCD does not show “DC”, “AC” nor sign when the
measured values are less than 5V.
The LCD shows “>314.9V” when the measured value exceeds
the display range (over range) and it shows “-OL” for negative DC
voltages.
7-2 Live circuit warning
The warning LED starts blinking red with audible warning when the
measured value is 30V or higher.
* The instrument does not carry out resistance measurements
even the Test button is held down while the live circuit warning is
activating.
LED starts blinking. (Red)
Fig. 7-3