HP 3468A - 3468 A Messages

Abnormal Multimeter Readings
lf
a
reading
is
larger
than
a
particular
range
can
display,
the
display
will
indicate
an
“OVLD’’
(overload)
with
the
measurement
function
and
decimal
point
still
displayed.
If
the
A-D
convertor
is
inoperative,
the
display
will
indicate
‘ERROR
8”
or
“A-D
ERROR”.
The
3468A
will
continue
to
try
to
make
a
reading,
and
if
it
succeeds,
it
will display the reading.
Message
It
was
demonstrated
in
the
last
two
paragraphs
that
the
3468A
is
capable
of
displaying
error
messages.
There
are
several
other
messages
the
3468A
may
display. For example:
Do This
The
display
should
now
_
indicate
“ENABLE
CAL”.
This
message
in-
dicates
that
the
calibration
switch
must
be set
to the
calibrate
position
before
the
instrument
can
be
calibrated.
press:
OR ADRS
(2) The display now shows the HP-IL ad-
dress of the 3468A.
These
are
two
more
examples
of
messages
which
the
3468A
may
display.
Other
possible
messages
will fall into one of three
categories:
Table 2-2. 3468A Messages
ERROR MESSAGES (see Self Test)
ERROR 1 - Calibration RAM error
ERROR 2 - Internal microprocessor RAM error
ERROR 4 - Internal microprocessor ROM error
ERROR 8 - A/D converter error detected during Self Test
A-D ERROR - An A/D converter error was detected while trying to take a reading
if
more
than
one
failure
is
detected,
then
“ERROR
dd”’
will
appear
in
the
display.
The
decimal
number,
ad,
represents the summation of the individual error message numbers. For example, ERROR 9 would indicate
0 that errors 1 and 8 were detected.
13