Fluke 8506A Instruction Manual page 289

2.
If
Calibration
mode
is
on, the zero value
recalled
is
always
that stored
in
Calibration
Memory.
7B-9. Error Conditions
The
multimeter employs
both
momentary
and
latching
errors.
Once
a
momentary
error
automatically
clears, further
multimeter operation
is
not
impaired.
A
latching error does
not automatically
clear
and
does
impede
further
multimeter
operation
until the
cause
for
the error
has been
corrected.
Latching
errors
include Error, Error
2,
Error
3,
Error
4,
Error
5,
Error
9,
and
Error
E.
Latching errors are normally
enabled, but are afforded
special
treatment
when
the
Calibration
mode
is
on.
The
following
rules
then
apply:
CAUTION
Do
not disable
latching errors during multimeter
calibration.
The
latching error
disable feature
Is
useful during troubleshooting (when
normally disallowed
module
configurations
may
be necessary). Since
latching errors
may
also
identify
an over voltage condition
(as
with
local Error 4 or
remote
error
14),
discretion
must
be
used.
1.
Latching
errors are automatically enabled whenever
Calibration
mode
is
enabled or
disabled with the rear panel Calibration Switch.
2. If
Calibration
mode
is
on, latching errors
can
be disabled
by pushing
the
AVG
button.
The
display should
respond
with "Err.
oFF",
indicating latching errors
have been
disabled.
(If
a latching error
exists
when
this
procedure
is
performed,
the
display
will
instead indicate an error message.
In
this
case, pressing
any
function
button
will
clear the error message.) Pressing
AVG
in
Calibration
mode
does not
enable
the
Average mode;
the
Average
mode
is
mutually exclusive with Calibration
mode.
3.
With
Calibration
mode
still
on, latching
errors are re-enabled
and normal
Calibration
mode
operation
is
restored
when
the
A VG
button
is
pushed
again.
If
a
latching error condition
exists at this time, the error
message
is
displayed.
If
no
latching error
exists,
the multimeter
front
panel
display responds with
(Err. on).
The
front
panel display
identifies
numerous
potential error conditions.
A
full
description
of error conditions
is
presented
in
Section 2 of the appropriate
Instruction
Manual.
The
following
list
identifies error
conditions
specifically applicable
to front
panel calibration
procedures.
1.
Error
0:
Store 0
error:
A
zero
STORE
or
RECALL
has been attempted
in
an unallowed
function.
Zero
corrections
can
only be
made
in
VDC
or
OHMS.
2.
Error
1:
Store during overrange:
The
STORE
(CAL COR)
sequence has been performed
when
the previously
taken
reading
was
overrange. This reading cannot
be used
in
the multimeter's gain
correction
computation.
The
applied source value must
be revised immediately
to
fall
within the
limits
defined
in
Table
2.
Damage
to the
multimeter could otherwise
result.
In
any
event,
Error
1
signifies
that the
gain correction factor has not
been
stored.
With
a legal value applied to the multimeter,
the
numerics
representing that
value
must be
entered again with the
STORE
(CAL COR)
sequence.
3.
Error
b:
Not
allowed
in
Calibration mode:
An
unallowed push button sequence has been attempted
in
the Calibration
mode.
Use
the correct sequence once the display has
cleared.