Fluke 8502A - Page 30

REQUIREMENT:
METHOD:
Monitor the stability of a power supply as a
decimal ratio to its present reading of
—20.08V. DC zeroing appears to be necessary.
Perform V DC Zeroing for internal drift.
Apply
low thermal short
between INPUT
HI
and LO (at the terminals).
Press:
STORE
VDC/OHMS
ZERO
The value
stored
will
be displayed as long as
VDC/OHMS ZERO
is held depressed.
Release
of the switch will activate the Zero mode. Revise terminal interconnections
for
dc
volts
measurements. Connect the dc voltage.
Apply power supply reading
of —20.08V as a
scaling
factor.
Press:
STORE
SCALING SCALING
Initial
use of
SCALING
places
the
displayed
value (which is seen as long as the
switch is held depressed) into memory. The
second use of
SCALING
places the
8502A into Scaling
mode.
Display will now yield the ratio of subsequent readings
to
the scaling factor,
e.g.,
an input of 22.08V yields
a
ratio
of:
22.088
20.08
5 A NUME
OFFSET
SCALING
RIC ENTRY
H!
LO
(value number)
-
ENTER
FILTER
(-,0,1,2,31
-
-
ENTER
SAMPLE (0
thru
17)
-
-
ENTER
REQUIREMENT:
METHOD:
Determine which of
a
group of power
supplies
have a
tolerance of
15V
±
100
mV.
Set high and low limits.
Press:
STORE “-“NUMERIC
HI
—1
—
5
_
. 1 ENTER
STORE
—NUMERIC — LO
—
1 9
—
ENTER
Select
LIMITS.
The 8502A will now display "HI”, "LO”, or "PASS” for
each
power
supply.
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