Scan Advance; Systems Use; Operation; Initial Turn-On - Fluke 8506A Instruction Manual

8506A
frequency of
interest)
and the calibration date
may
be stored.
2-131.
Hardware
calibration
is
facilitated
while
in
Calibration
mode. Enhanced
resolution allows for
more
precise
potentiometer adjustment during hardware
calibration.
With no
mathematic operations allowed,
the
display represents the true input value.
2-132.
Troubleshooting
is
also aided
by
using the
Calibration
mode. Latching
errors
can be disabled
to
allow
special
module
configurations.
CAUTION
Latching
errors are
intended
for
multimeter
protection
and must
not
fee
disabled during
normal
operation or
calibration.
Refer
fa
Troubleshooting
in
Section
4.
2-133.
USE
2-134.
The
multimeter uses three calibration controls:
the rear
panel calibration switch,
and
the front panel
(CAL DATE)
and
(CAL COR)
push
buttons.
The
rear
panel calibration switch
activates
the Calibration
mode
and enables use of
the
(CAL
COR)
and
(CAL DATE)
push buttons.
Store operations with
these
two push
buttons are used
for
software calibration
and
are
explained
in
Appendix
7B. Recall operations can be
performed
at
any time and
are
explained
in
the following
paragraphs.
2-135.
The
(CAL DATE)
push button
cart
be used
in all
functions (including the
three
V
AC
functions)
to recall
a
six digit
number.
This
number
may
signify the calibration
date.
For
example, a
recalled
0 2
1
8 8 3
would
signify
February
18,
1983. Alternately, the six digits
may
be used
to identify the multimeter.
2-136.
To
recall
the six digit
date (or
identifier)
while
in
the
Calibration
mode,
push:
RECALL
(CAL DATE)
If
the
multimeter
is
not in the
Calibration
mode,
the
six
digit
date
(or identifier)
may
be recalled using the
following sequence:
RECALL LO (CAL DATE)
2-137.
The
(CAL COR)
push button
may
be used
to
recall
the
uncorrected reading
when
the
multimeter
is
in
the Calibration
mode,
use:
RECALL
(CAL COR)
The
uncorrected reading can
also
be
recalled
when
the
multimeter
is
not
in
the Calibration
mode. Use
the
following sequence:
RECALL
LO
(CAL COR)
2-1 38.
Scan Advance
2-139.
The
multimeter outputs
a sync signal
during each
measurement
sequence. This
signal
occurs
after the
measurement
is
complete, but before
a
new
trigger
is
accepted.
The
sync
signal
thereby allows
for faster
bus
communications by advancing
a scanner before a
new
reading
is
triggered.
The
signal (positive
going
TTL,
3
microsecond pulse width,
50-ohm
output impedance)
is
available at a
BNC
connector on the multimeter
rear
panel.
2"14Q.
Systems
Use
2-141.
The
availability
of optional
interface
modules
makes
the
multimeter adaptable
to
a large variety of
digital
systems.
Operating and programming
instructions
related to
remote
operation are included with the
appropriate optional
module.
2-142.
OPERATION
2-143.
initial
Turn-On
2-144.
Before
initial
turn-on, check
that the
line
voltage
specified
on
the rear
panel
sticker (near the
line fuse)
agrees with the
line
voltage actually being
used.
If
there
is
any doubt concerning
the
line
voltage setting, refer
to
Line Voltage Selection in Section
4.
Also
verify that the
Calibration Switch
is
off.
Once
these verifications
have
been
made, connect
the
power
cord
and push
the
POWER
button
to
ON.
2-145.
The
multimeter
identifies
its
own
software
and
hardware
at
initial
turn-on.
Software
is
identified with a
display of
"HI
- Y.Y.Y",
where "Y"
represents the software
version
in use.
Hardware
is
then
identified
with a
display
of-
"CXXXXX,"
where
"X"
signifies
any
installed
options
by
number
(or the
Thermal
True-RMS
Converter
as A).
2-146.
The power-up
(reset)
configuration
is
now
established.
The
multimeter
is
set
for the
V
DC
function,
the
I000V manual
range,
filter
mode
F0,
sample
factor
7,
auto
trigger,
zero
mode
on,
and
local
operation. All other
modes and
values are disabled,
The
multimeter
may now
be
programmed
as described
in this
Section.
A
two-hour
warm-up
ensures rated accuracy. Better accuracies
can
be
obtained in the
Averaging
mode
(after
a four-hour
warm-
up).
2-147.
Initial
Set-Up
2-148.
The
three front
panel terminal controls (Rear
Input Selector,
Ohms
Selector,
and
Guard
Selector)
must
be positioned correctly prior to
taking
measurements.
Use the following guidelines:
1.
The
Rear Input Selector
must
be disengaged
(out) for front
panel
inputs or
engaged
(in)
for
inputs applied
through the rear panel connector.
Ohms
Guard
is
only available
through
the rear
connection.
External Reference
HI and
LO
is
always available
through
the rear input
connector
(not switched).
2.
The
Ohms
Selector
must
be disengaged
(out)
for
two-wire
resistance
measurements or engaged
(in)
for
four-wire resistance
measurements. For
all
other
functions, the
Ohms
Selector
can
be
left
disengaged.
However,
it
is
recommended
that the
Ohms
Selector
be engaged
(in)
whenever making
2-29