15
Notes:
A. General’s FX3000 Flex Clamp Adapter (optional)
makes it possible to enclose a thick or hard-to-
reach conductor, a bundle of conductors, or a
busbar carrying up to 3000A. The accessory uses
induction to convert current readings to millivolt
values that can be displayed by the CM660 or
CM700. For more information or to order, visit
www.generaltools.com and enter “FX3000” in the
SEARCH box.
B. General’s ACL10 Line Splitter (optional) makes it
possible to safely attach the CM660 or CM700 to
a line cord carrying up to 15A AC without
separating its conductors, thereby damaging
the cord. For more information or to order, visit
www.generaltools.com and enter “ACL10” in the
SEARCH box.
Measuring AC Inrush Current
To measure the inrush current
of a motor during
startup, press the
FUNC/INRUSH
button with the rotary
function switch in the
position. The term
INR
will
appear on the top line of the LCD and the primary
readout will show the motor’s surge current (to a
maximum of 600A for the CM660 and 1000A for the
CM700). For this application, the current is measured
by the clamp jaw, after it has been placed around one
conductor of the motor’s power supply line.
To return to AC current measurement mode, press the
FUNC/INRUSH
button again.
Measuring Microamp Currents
The CM660/700 provides two dedicated ranges
(0 to 200
애
A, and 0 to 2000
애
A) for measuring minute
amounts of AC or DC current (such as from a furnace
flame rod). For this application, the test leads are
placed in series with the device conducting the
current.
