4-8
IM CW500-01EN
Self-Diagnosis
If NG is displayed frequently, the instrument may be malfunctioning. Stop
using it immediately, and see chapter 10, “Troubleshooting,” on page
10-1.
Sensor Detection
If detection fails, current clamp-on probe types are displayed in red.
Detection Failure Cause
Check
Cause
Current
clamp-on
probe type
• Different types of current clamp-on probes are connected
to each channel. Use the same type of current clamp-on
probes for measurement.
???
(cause
unknown)
• Current clamp-on probe is not firmly connected to the
instrument.
• Troubleshooting
Connect the current clamp-on probe that failed to be
detected to a channel that detection was successful, and
test again. If the same channel fails again, the instrument
may be malfunctioning. If detection fails on the channel
connected to the current clamp-on probe that failed to
be detected the last time, the clamp-on probe may be
malfunctioning. If you suspect a malfunction, stop using
it immediately, and see chapter 10, “Troubleshooting,” on
page 10-1.
4.2 Starting to Record with “Quick start guide”
