3-14
IM 760301-01E
3.9
Wiring the Circuit under Measurement for
Direct Input
The measurement cable is wired directly from the circuit under measurement to the
voltage/current input terminal.
To prevent the possibility of electric shock and damage to the instrument, follow the
precautions given in section 3.5, “Wiring Precautions.”
Connecting to the Input Terminal
• Voltage Input Terminal
The terminal is a
φ
4-mm safety banana jack (female).
Insert the safety terminal (the conductive parts are not exposed) into the voltage input
terminal. When using the 758931 Safety Terminal Adapter that comes with the
package, see section 3.6.
• Current Input Terminal
• When the voltage of the circuit under measurement is being applied to the current
input terminals, do not touch the current sensor input terminals. Since these
terminals are electrically connected inside the instrument, this act is dangerous.
• When connecting measurement cables from an external current sensor to the
current sensor input connector, remove the cables connected to the current input
terminals. In addition, when the voltage of the circuit under measurement is being
applied to the current sensor input terminal, do not touch the current input
terminals. Since these terminals are electrically connected inside the instrument,
this act is dangerous.
• The terminal is a binding post, and the screws are M6. Either wind the wire around
the screw or pass the crimp-on lugs through the screw axis, then tighten firmly by
holding the terminal knob.
CAUTION
• When doing so, make sure that no foreign objects are present in the contacts
between the current input terminal and crimp-on lugs.
• Periodically check whether the current input terminal knob is loose, and whether
any foreign objects are present in the contacts between the current input
terminal and crimp-on lugs.
3.1
2.1
6
7
Unit: mm
Number of Installed Input Elements and Wiring Systems
Limitations are placed on the wiring systems that can be selected depending on the
number of input elements that are installed in the instrument. For example, three-phase,
four-wire (3P4W) cannot be selected on models with two input elements. For details, see
“Number of Installed Input Elements and Wiring Systems” in section 2.3, “Measurement
Conditions.”