YOKOGAWA CW120 - Connecting Input Signals

2-3
IM CW120-E
Components and Indications
2
2.2 Connecting Input Signals
Voltage probe (red)
Voltage probe (black)
Clamp-on current probe
Ring marker
WARNING
• Thoroughly read Section 5.1, “Precautions for Wiring the Circuit under Test.”
• When connecting the CW120/121, turn off the circuit under test. It is extremely dangerous to
connect or disconnect probes to/from a live circuit.
• Be extremely careful not to connect any voltage-mode circuit to the current input terminals or
any current-mode circuit to the voltage input terminals. Miswiring can result in not only dam-
age to the circuit or equipment under test but also injury to personnel.
• Do not connect any probes which are not necessary (i.e., not used) for the current measure-
ment, even though multiple probes can be connected to the CW120/121 at the same time.
• Do not use any probe other than the clamp-on current probes or voltage probes supplied.
• Do not use a clamp-on current probe for a non-insulated conductor.
• Ensure that the rating of the clamp-on current probe you use matches the rating of the mea-
sured current.
• Before connecting a clamp-on current probe to the CW120/121, make sure the plug is inserted
with the correct H/L polarities.