Datron 1061 Calibration And Servicing Handbook page 15

1.4.4
General
The
procedure
in
the table opposite
is all that
is
necessary
to
completely 'AUTOCAL',
the AC
voltage
function. On each ,rng.
¡rrt
a
'Zero'
,'Gain'
and
'AcHf'
calibration
is
required.
lf
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
rryill
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
100mV
Range
zero
(steps 1
& 2 of
the table), Guard
is
connected
to
Lo
using
a
copper shorting
link'
!
7A
1.4
AC VOLTAGE CALIBRATION
-
10614 OPTION
12
ONLY
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' sect¡on
of the
User's
Handbook can
be
employed.
lt
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'
o
I