Hioki ST5680, Instruction Manual, Page: 112 / 253

112
GFI Function (DCW Only)
8.5 GFI Function (DCW Only)
When the operator accidentally comes in contact with high voltage, serious damage or fatal
hazards could occur to the operator. This function shuts off the output when a current over 0.5 mA
flows from the earth of the test target to the ground to protect the operator from such electric shock
hazards.
1
Press [SYSTEM] > [GFI] on the measurement
screen.
OFF Disables the GFI function.
ON *
1
Enables the GFI function.
*1. Default setting
IMPORTANT
The output may be cut off by ground fault if the instrument is used in an environment susceptible
to common mode noise.
False detection of GFI due to noise
When the difference between the two ammeters
inside the tester becomes 0.5 mA or more, the tester
judges it as a ground fault and shuts off the output
signal.
The output may be cut off by ground fault
if the instrument is used in an environment
susceptible to common mode noise.
ST5680
ST5680
(a) GFI fault detection principle (b) Ground fault detected by noises
HIOKI ST5680A961-00