32
Grounding Instrument
(1) If setting a guard using a retainer, measurement xture, etc. (Grounding the GUARD terminal)
Connect the GROUND terminal to the GUARD terminal.
Grounding the GUARD terminal allows the positive setting voltage output from the OUTPUT
terminal to be applied.
Measurement can be done more safely because the potential of the guard circuit equals to the
ground potential. (See the gure below.)
Shorting plug
INPUT
GUARD
GROUND
CHARGE
OUTPUT
A
SM7110/SM7120
Ammeter
Current limiter
Measurement
voltage
source
−
+
(2) If measured objects are not grounded
Connect the GROUND terminal to the OUTPUT terminal or the GUARD terminal. Either of them
can be connected to.
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