Datron 1062 - Page 15

7A
1.4
AC
VOLTAGE
CALIBRATION
-
1061 A
OPTION
12
ONLY
1
.4.4
General
The procedure
in the
table
opposite
is all
that
is
necessary to
completely
'AUTOCAL'
the AC
voltage
function. On
each
range
just a
'Zero', 'Gain'
and
'AcHf'
calibration
is
required.
If the 'DVM
Reading
After Calibration'
is not
in
accordance
with
the
table,
repeat
operation
of the same
'CALIBRATE'
key
is
permissible to
improve the
readings.
This will be
necessary
with
the
AcHf key.
Note;
To
reduce the
effect
of noise
at low
input
levels, AC
zero
calibration
is carried
out
at
0.1%
Range;
and
for
lOOmV
Range zero
(steps
1
& 2
of the
table).
Guard
is
connected to Lo
using
a
copper
shorting
link.
1.4.5
Equipment
Required
A
copper
shorting
link and
an AC
calibration
source
e.g.
Datron
4200
Autocal AC
Standard.
1.4.6
Checking
Accuracy
after
'AUTOCAL'
To
check
the
accuracy
after 'AUTOCAL'
the
'Specif-
ication
Verification'
section
of the
User's
Handbook
can
be
employed.
It
describes
the use
of 'Spec'
mode
to
verify
the
accuracy
of the
instrument,
also
providing a
report
sheet
'master
copy'
for
compilation
of
permanent
records.