3.2 Configuring Settings
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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 input terminals.
• The input terminals are isolated.
• The maximum input current is 30 A, ±100 A peak.
• 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 8 V, ±12 V peak.
• TYPE.1 and TYPE.2 input is supported, depending on the current sensor specifications.
TYPE.1 current sensors (p.102)
These current sensors can be directly connected to the external current sensor input terminal.
• Model 9661 Clamp on Sensor (rated current: 500 A AC)
• Model 9669 Clamp on Sensor (rated current: 1000 A AC)
• Model 9660 Clamp on Sensor (rated current: 100 A AC)
• Model CT9667 Flexible Clamp on Sensor (rated current: 500 A/ 5,000 A AC range switchable)
TYPE.2 current sensors (p.102)
Connecting these sensors to the external current sensor input terminal requires optional 9555-10 Sensor Unit
and L9217 Connection Cord.
• Model 9272-10 Clamp on Sensor (rated current: 20 A/ 200 A AC range switchable)
• Model 9277 Universal Clamp on CT (rated current: 20 A AC/DC)
• Model 9278 Universal Clamp on CT (rated current: 200 A AC/DC)
• Model 9279 Universal Clamp on CT (rated current: 500 A AC/DC)
• Model 9709 AC/DC Current Sensor (rated current: 500 A AC/DC)
• Model CT6862 AC/DC Current Sensor (rated current: 50 A AC/DC)
• Model CT6863 AC/DC Current Sensor (rated current: 200 A AC/DC)
• Model CT6865 AC/DC Current Sensor (rated current: 1000 A AC/DC)
• Model CT6841 AC/DC Current Probe (rated current: 20 A AC/DC)
• Model CT6843 AC/DC Current Probe (rated current: 200 A AC/DC)
3.2 Configuring Settings
3.2.1 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 terminals, disconnect all wiring from the current
input terminals. Similarly, when using the current input terminals, disconnect all wiring from the
external current sensor input terminals.
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.100)
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