Fluke 8505A - Power-Up Configuration and Display Elements

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
wmmmmmm
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