Fluke 8505A Instruction Manual page 13

2-19.
Power-Up Configuration
2-20.
At power
initialization,
or
whenever
the
RESET
button
is
pushed, the
multimeter
assumes the
power-up
configuration. Basically,
the
instrument
assumes
the
V
DC
function
with
all
modes and
values disabled.
The
power-up configuration
is
fully
defined
in
Table
2-2.
2-21. Display
2-22.
MEASUREMENT READING
2-23.
The measurement
display consists
of mantissa and
exponent
fields.
The
mantissa presents
polarity, 5-1/2,
6-
1/2,
or 7-1/2
digit
resolution (range
and
function
dependent) and automatic decimal placement. In
addition, the
mantissa
displays
numeric
storing
entries,
recalled values,
error
and warning
information,
and
interactive
programming
information
(prompts).
Decimal point positions are
labeled.
(1, 10,
100, Ik) to
correspond with range settings (as
defined
in
Figure
2-3).
2-24.
When
very
large
or small readings are displayed,
the
exponent
field is
also
used
to
maintain
maximum
8505A
resolution.
A
negative or
positive
exponent
field
polarity
indicates multiplication of the
mantissa by
the displayed,
power of
ten (-3
means
.001,
+3
means
1000).
Exponent
values of
-6, -3,
+3,
or
+6
are available for
displayed
readings.
Additional
exponents of -9
and +9
are
available for offset
and
scaling
numeric
entries.
2-25.
When
the
Averaging
mode
is
selected,
the
exponent
may
serve as
an
additional
digit
of resolution.
When
the Limits
mode
is
selected,
the
entire
measurement
display
is
devoted
to
an
indication
of HI,
LO,
orPASS.
2-26.
ANNUNCIATORS
2-27.
Any
valid
function selection
causes one
of the
function annunciators
(V
DC,
V
P
C
y
A
DC,
A
AC,
OHMS)
to light.
The
V
DC
annunciator normally
lights
in
the
power-up
or
reset
configuration.
However,
if
the
DC
Signal Conditioner
module
is
faulty or not
installed
and
a functional
RMS
Converter
module
is
installed,
power-up
or
reset
causes the
V
AC
annunciator
to
light.
Two
function annunciators
(V
DC
and
V
AC)
light
when
Function
SELECTION OF
NEW
FUNCTION
(1)
CONDITION
CONDITION DISPLAY
DC
Volts
V
DC
on
New
Function
VDC, VAC, ADC,
AAC
or
OHMS
on
Range 1000V Manual
Autoranging
AUTO
on
Trigger
Auto
33I1SS
Retains Previous Trigger
Mode
SAMPLE
flashing or
off
Filter
F0
FILTER
off
Retains Previous
Filter
Mode
(2)
FILTER on
or
off
Sample 7
SAMPLE
flashes
Retains Previous
Sample
Setting
(2)
SAMPLE
flashes
Offset Off,
Value 0 Off,
retains
value
OFFSET
off
Scaling Off,
Value
1
Off,
retains value
SCALE
off
External
Reference Off,
Note 3
EXT REF
off Off,
retains last
value
EXT REF
off
Limits Off,
Value 0
wmmm
mmm
Off, retains last
value
Normal
Display
Peak
"PEAR
off
Off, retains last
values
PEAK
off
Averaging
Off
AVG/(CAL)
not
on
steady Off
(2)
AVG/(CAL)
not
on
steady
Zero
On, Cal
Memory
Values
Zero
on
Retains
mode
values
and
state
(4)
ZERO
on (VDC,
OHMS)
or
off
Calibration
Mode
Note
4
Note
4
Notes:
1.
Re-selection of the
same
function sets
autoranging
(AUTO
on), but retains
all
other
mode
values
and
states.
2.
Disabling
Average
mode
(by
changing
to
a
new
function) sets
filter
mode F0 and sample
setting
7. if
the
same
function
is
re-
selected,
the state of
Average
mode
is
not
changed, and
the existing
filter
mode
and sample
setting
are retained.
3.
The
External
Reference value
is
initialized
to the
multimeter software
number whenever power-up or
reset
occurs.
RECALL
EXT REF
can
then be used to display
this
number.
Any subsequent
activation of External
Reference
mode
replaces the software
number with the actual external reference value.
4.
The
Calibration
mode
state
is
on or
off
solely
dependent on the
position of
the
rear
panel
Calibration Switch.
Do
not cycle
power
on
or off
with
this
switch
ON.
Calibration
mode
entries are
applied
to
the reading as follows:
a.
Gain correction factors are
always applied (Calibration
mode
on
or
off).
b.
Zero values are applied
whenever Zero
mode
is
on
or off
(Calibration
mode on
or
off,
VDC
or
OHMS
selected).
However,
the
zero values
used
depend
on the Calibration
mode
state.
Modes
Cal
mode
on,
zero
off
Cal
mode
on,
zero on
Cal
mode
off,
zero
off
Cal
mode
off,
zero
on
Zero
applied
Nothing
Permanent Zero
Permanent Zero
Permanent Zero and Temporary Zero
2-5