Operating Precautions
8
Connecting, Input and Measurement
• The maximum input voltage is 1000 V DC/AC and the maximum input current to the
current input terminals is 30 A DC/AC.
Attempting to measure a voltage or current in excess of each of the maximum inputs
could destroy the instrument and result in personal injury or death.
• The maximum rated voltage between input terminals and the ground is as follows;
(CAT II) 1000 V DC, 1000 V AC
(CAT III) 600 V DC, 600 V AC
Attempting to measure voltages exceeding this level with respect to ground could
damage the instrument and result in personal injury.
• The external current sensor input terminals are not insulated. The terminals are
exclusive to the optional current sensors. To prevent instrument damage and bodily
injury, do not connect any device other than an optional current sensor.
• To avoid the danger of electric shock, do not input a signal in excess of the ratings
to the external I/O terminals.
• This instrument should only be connected to the secondary side of a breaker, so the
breaker can prevent an accident if a short circuit occurs. Connections should never
be made to the primary side of a breaker, because unrestricted current flow could
cause a serious accident if a short circuit occurs.
• To avoid electrical accidents, confirm that all terminals are secure
. The increased
resistance of loose connections can lead to overheating and fire.
(Tightening torque of the input terminals: 3 Nm)
Safety covers
• The safety covers play a protective role by preventing contact with the terminals.
Always attach the safety covers before using the instrument.
• Turn off the supply of power to measurement lines before attaching or removing the
safety covers.
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