Hioki Super megohm SM7110 - Using Instrument as Ammeter (If Operated in Combination With External Power Supply)

Appx.7
Using Instrument as Ammeter (If Operated in Combination With External Power Supply)
Appx. 5 Using Instrument as Ammeter (If Operated
in Combination With External Power
Supply)
Be sure to read “Before using the instrument as an ammeter” (p. 14) beforehand.
1
Connect the object to be measured and the other devices to the instrument as follows.
A
INPUT
GUARD
GROUND
OUTPUT
R R p
V o
SM7110/SM7120
−
+
Protective
resistor
External power supply
Object to be
measured
Short-circuit
Object to be
measured
Protective
resistor
External power supply
Short-circuit GROUND and
GUARD with shorting plug
Measurement
voltage source
Current limiter
Ammeter
When using the external power supply, insert a protective resistor so that a current owing through
the instrument is reduced to the current rating or less even if the terminals of the object to be
measured are short-circuited with each other.
Test using a measurement voltage of 1000 V or less: 50 mA or less
Test using a measurement voltage exceeding 1000 V: 1.8 mA or less
2
Congure the instrument setting as follows:
Trigger: Internal trigger (INT) (p. 58)
Setting of voltage value for resistance calculation: voltage set value (set value is external
power supply output value) (p. 56)
3
Turn on the external power supply.
4
Connect the measurement leads to the object to be measured.
5
Apply the voltage from the external power supply.
Appx.