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IM 760301-01E
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App
Index
Before Starting Measurements
3.10 Wiring the Circuit under Measurement When
Using the Current Sensor
To prevent the possibility of electric shock and damage to the instrument, follow the
precautions given in section 3.5, “Wiring Precautions.”
If the maximum current value of the circuit under measurement exceeds the maximum
range of the current input terminal as described below, an external sensor can be
connected to the current sensor input connector in order to measure the current of the
measurement circuit.
• 2-A input element
When the maximum current exceeds 2 Arms
• 30-A input element
When the maximum current exceeds 30 Arms
Current sensor output type
• In the wiring example in this section, a shunt-type current sensor or a clamp-type
current sensor that outputs voltage can be used for an external current sensor.
• When using the clamp-type current sensor that outputs current, see section 3.11.
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.
• External Current Sensor Input Terminal
Connect an external sensor cable with the BNC connector (B9284LK, sold separately)
to the external current sensor input connector.
Remove the measurement cable connected to the current input terminal. Because the
current sensor input terminal and the current input terminal are connected internally,
connecting both terminals simultaneously not only results in measurement errors but
also may cause damage to the instrument.
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.
Number of Installed Input Elements and Wiring Systems
The selectable wiring systems vary depending on the number of input elements that are
installed in the instrument. For details, see “Number of Installed Input Elements and
Wiring Systems” in section 2.3, “Measurement Conditions.”