KYORITSU 4300 - Manual (Page 19)

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● The displayed value should be less than 10V.
The warning LED starts blinking yellow when the earth voltage
is 10V or higher. (The LED starts blinking at 3V or higher if the
frequency of the earth voltage is 400Hz.)
Ensue that the systems connected to the earth electrode under
test are turned off to get the earth voltages lower when the
warning LED for earth voltage starts blinking. Otherwise, accurate
measured results can not be obtained. The warning LED for earth
voltage may not light up if the frequency is over 400Hz.
● The warning LED starts blinking red with audible warning when
the voltage of 30V or higher is detected. Earth resistance
measurements can not be carried out by pressing the Test
button while the live circuit warning is activating.
(4) Measurement
Press the Test button. The LCD shows the measured result.
The instrument carries out an earth resistance measurement
while the Test button is held down. The buzzer sounds when the
measured value is less than 100Ω.
The measurement is halted when the Test button is released,
and the measured data freezes on the LCD. (The “ ” symbol
appears on the LCD.) A short press of the Test button while the
result is being displayed on the LCD gets the instrument entered
into the Voltage measurement mode.
● The LCD shows “>2099Ω” when the measured result exceeds
the display range. (Over range)
● The instrument automatically enters into the voltage
measurement mode when sensing the live circuit during a
resistance measurement and activates the warning function.
● If an earth resistance measurement is continued at low battery
level with Battery symbol on the LCD, the instrument may be
powered off suddenly.
LED starts blinking.
10V or higher: yellow
30V or higher: red
Fig. 8-5