AEMC 2139.83, User Manual

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Clamp-on Meter Model 566
3
CHAPTER 2
PRODUCT FEATURES
2.1 Description
The TRMS Clamp-on Meter Model 566 is designed to
measure low AC currents, which are typically leakage
currents in ground conductors. Low currents are
measured in the 60mA and 600mA ranges. Note the high
sensitivity of the probe: 1uA, 10uA, and 100uA resolution
when measuring mA. This is possible through special
jaw construction and in particular critical shielding of the
jaws. At low measurement levels, shielding out noise is
critical for low sensitivity, accuracy and stability.
Leakage current may be measured on a ground
conductor and through the vector sum on multi-
conductors. On a grounded system, clamp around the
two or three conducting legs (not the ground conductor).
The vector sum of the load currents will cancel out,
leaving the leakage current measured.
You can also use the Model 566 as a standard clamp-on
meter to 60A
rms
, plus standard V
AC
, V
DC
ranges,
resistance and continuity with a buzzer. In mA
AC
and
A
AC
, the user can activate a low-pass filter (LPF) to
ignore all currents other than 50/60Hz. In this mode, only
the fundamental signal is measured.
The Model 566 is ergonomic in design and fits well in the
hand. Also, one hand operation is possible. The jaw size
is compact yet designed to accommodate most known
ground conductors up to 0.91" (23mm) in diameter.