Table of Contents
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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
E
NTRY
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.
2-20
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