Voltech AT360, User Manual

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F
RONT
-
PANEL
M
ODES
P
AGE
6-30 V
OLTECH
AT
I
U
SER
M
ANUAL
To compensate for the effect of stray inductance, the ATi must make a
measurement with a short-circuit in place of the winding(s) under test. This is
called short-circuit compensation.
The short-circuit should be made of a piece of copper wire that is as short as
possible. If you are making measurements using a fixture plate, it is usually
convenient to make a part up with short-circuits in place of the windings on a
sample bobbin without cores.
Transformer Shorting bobbin for compensation
To compensate for the effect of stray capacitance, the ATi must make a
measurement with no winding(s) in place.
This is called open-circuit compensation.
The DC resistance test (Rdc) uses short circuit compenstion only; the other
LCZ measurement require both. Once L, C or Z is compensated, this
compensation is stored and applied to any L,C or Z measurement as long as
the measurement conditions and nodes are not changed.
Compensation values are unique to the voltage and frequency test conditions
and, thus, you must re-compensate if any of these values are changed. The
display will always show ‘comp req’ when valid compensation measurements
are not available.