ESI 250-DA - Measuring AC Voltage Across Capacitors

2.4.5
AC
VOLTAGE
MEASUREMENT
To
measure
the ac
voltage
applied
to
the
unknown
capacitor:
Connect
the
ground
terminal
of
a high
impedance ac
voltmeter to
the
EXT
D-Q
terminal
marked G.
Connect
the input
terminal
of the
voltmeter
to
the high
unknown
capacitor
terminal
of
the
bridge.
Balance
the
bridge.
Read
the
voltmeter.
With
the
bridge
balanced,
this
voltage is
equal
to
the ac
voltage
across
the
unknown
capacitor,
but
the
capacitor
has
not
been
loaded
by
the
voltmeter.
The
bridge
read-
ings,
however,
may
be
incorrect
while
the meter
is connected.
UNKNOWN
CAPACITOR
VTVM
6ND
UNKNOWN CAPAOTOt
le^sl
n
250-DA
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