3.2 Configuring Settings
42
This section describes how to select the current input method. The instrument can perform measurement
using the current input methods listed below. The default setting is the current direct input method (setting:
OFF).
• Connect wires and input current directly to the current direct input terminals.
• The input terminals are isolated.
• The maximum input current is 70 A, ±100 Apeak.
• Connect optional current sensors (voltage output) to the external current sensor input terminals to measure
current.
• The input terminals are not isolated. Isolation is accomplished by the connected current sensors.
• The maximum input voltage for the external current sensor input terminals is 5 V, ±7.1 Vpeak.
• TYPE1 and TYPE2 input is supported, depending on the current sensor specifications.
TYPE1 current sensors (p.104)
• 9661 Clamp on Sensor (rated current: 500 A AC)
• 9669 Clamp on Sensor (rated current: 1000 A AC)
• 9660 Clamp on Sensor (rated current: 100 A AC)
• CT9667 Flexible Clamp on Sensor (rated current: 500 A/5,000 A AC range switchable)
TYPE2 current sensors (p.104)
Requires optional 9555-10 Sensor Unit and L9217 Connection Cord.
• CT6862 AC/DC Current Sensor (rated current: 50 A AC/DC)
• CT6863 AC/DC Current Sensor (rated current: 200 A AC/DC)
• 9709 AC/DC Current Sensor (rated current: 500 A AC/DC)
• CT6865 AC/DC Current Sensor (rated current: 1000 A AC/DC)
• 9277 Universal Clamp on CT (rated current: 20 A AC/DC)
• 9278 Universal Clamp on CT (rated current: 200 A AC/DC)
• 9279 Universal Clamp on CT (rated current: 500 A AC/DC)
• 9272-10 Clamp on Sensor (rated current: 20 A/200 A AC range switchable)
3.2.2 Selecting the Current Input Method
• The external current sensor input terminals are not isolated. You must connect an
optional current sensor in order to use them.
• Inputting a voltage other than output from an optional current sensor or inputting a
primary-side voltage may damage the instrument or cause electric shock, a short-cir-
cuit, or bodily injury.
When using external current sensor input, disconnect all wiring from the current direct input
terminals. Similarly, when using the current direct input terminals, disconnect all wiring from
the external current sensor inputs.
The current input method serves to switch the input signals to the instrument’s internal circuitry.
Improperly configuring the current input method will make it impossible to make accurate measurements.
Current direct input method
External current sensor input method (p.102)
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