5-6
IM CW120-E
5.5 Wiring Check Function
WARNING
• It is important to check the wiring for correct and safe measurement. Check the wiring with
reference to Chapter 3, “Precautions for Safe Measurement,” Section 5.1, “Precautions for
Wiring the Circuit under Test,” and Section 5.3, “Wiring the Circuit under Test with External VT/
CT.”
• Check the connections of voltage probes, and for clamp-on current probes, check the models
(ratings), H/L polarities of the plugs and jacks, and the arrow symbols on the clamps corre-
sponding to the source-to-load directions of the circuit.
• Do not use a clamp-on current probe with any non-insulated conductor.
● Check Items
The following items are checked and judged, and then the result of each
check item will be displayed as shown on the next page.
For each voltage input: For each current input:
1. Existence of input voltages 1. Existence of input currents
2. Frequency detection 2. Clamp directions
3. Voltage phase sequence
NOTE
• Measurement is not performed during the wiring check.
• The wiring check cannot be carried out during continuous measurement.
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