Clamp-on Meter Models 501 and 503
21
4.9 Frequency Measuring Using
Voltage Input
• Turn the rotary range switch to the
range.
• Insert red test lead to the red "
+
" input jack and the
black lead to the black "
COM
" input jack.
• Bring the test probe tips into contact with the sample
under test.
WARNING:
Immediately unclamp the meter
from the conductor under test if overload " "
is displayed.
Summary of Contents for 501N
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