Fluke 8050A - Page 21

OPERATION
CONDUCTANCE
CONDUCTANCE (S
=
1/0)
1.
DE-ENERGIZE CIRCUIT TO
BE
MEASURED
2.
SELECT
RANGE
3.
SELECT FUNCTION
----,.
4.
CONNECT TEST LEADS
LOW(-)
\
CIRCUIT
RELATIVE
~o
OFF
...
POWER
o~
OFF
...
NOTE:
Zero the display (with the
RELATIVE
function) taking conductance measurements
(see
Relative
Measurements).
Figure
2·6.
Conductance Operation
2-34. Refer to the sample displays in Figure
2-8.
If
the
range changes, the
8050A
automatically multiplies
or
divides the relative reference by the appropriate power
of
ten before subtracting the relative reference from the
measurement.
If
the function is changed, the REL
annunciator disappears, and the relative reference
is
stored with the original function. When the original
function
is
reselected, the relative reference
is
restored
(and the REL annunciator appears) unless a new relative
reference was selected.
Setting
the RELATIVE switch to
OFF
or
turning the instrument off cancels the original
relative reference.
2-35. The relative function may
be
used with all
measurement functions: ac
or
de voltage, ac or de current,
2-8
ac
or
de dB, resistance, and conductance. Note that input
overload limits are not changed by the use
of
the relative
function. Also, when using the relative reference function,
the display limits do not change. The possible readings are
still subject to the limits of the
19999
counts
of
the
a/
d
converter, regardless
of
the relative reference.
For
example, if a de voltage measurement
of
+ 15.000V
is
made on the
20V
range and stored as a relative reference,
the maximum positive relative voltage that could
be
displayed without overranging
is
+4.999V (+19.999V
input). The maximum negative input voltage that could
be measured without overranging is -4.999V, which
would cause the relative display reading to
be
-19.999V
REL.
H'