2-16
IM WT310-02EN
2.9 Wiring the Circuit under Measurement for
Direct Input
This section explains how to wire the measurement cable directly from the circuit under measurement
to the voltage or current input terminal. To prevent electric shock and damage to the instrument, follow
the warnings given in section 2.5, “Precautions When Wiring the Circuit under Measurement.”
Connecting to the Input Terminals
Voltage Input Terminals
The terminals are safety banana jacks (female) that are 4 mm in diameter.
Only insert a safety terminal whose conductive parts are not exposed into a voltage input terminal.
If you are using the included 758931 Safety Terminal Adapter, see section 2.6.
758931
Voltage input terminals
WT310/WT310HC
WT332/WT333
Current Input Terminals
The terminals are binding posts, and the screws are M6. Either wind a wire around a screw or pass a
crimped terminal through the screw axis, and then tighten firmly with the terminal knob.
3.1
2.1
6
7
Unit: mm
Current input terminals
Current input terminals
WT310/WT310HC
WT332/WT333
WARNING
• When the voltage of the circuit under measurement is being applied to the current input
terminals, do not touch the external current sensor input terminal. Doing so is dangerous
because the terminals are electrically connected inside the instrument.
• When connecting a measurement cable from an external current sensor to an external
current sensor input terminal, remove the cables connected to the current input terminals.
Also, when the voltage of the circuit under measurement is being applied to the external
current sensor input terminals, do not touch the current input terminals. Doing so is
dangerous because the terminals are electrically connected inside the instrument.
CAUTION
Confirm that no foreign materials are caught between the current input terminal and the
crimped terminal. Periodically confirm that the current input terminal is not loose and that there
are no foreign materials caught between the current input terminal and the crimped terminal.
