High Speed Mode - Fluke 8505A Instruction Manual

8505A/8506A
Table
2A~2,
Programming
Instructions (85QSA,
8S08A)
The following discussion
relates
remote operation features
available with the
8505A and
the
8506A
to existing
documentation
for
remote operation
of the
8500
series multimeters.
The
additional features for the
8505A and
the
8506A
are presented
in this
discussion
in
the
same sequence
as
they
would appear
in
the
"Programming
Instructions" table (Table 2A-1).
Most
of the items
documented
in
this table
supplement
features available with the
8502A and 8502A/AT.
Incompatibilities
have been
kept to a
minimum,
Therefore,
programs designed
for
the
8502A
are generally
compatible with the
8505A and
the
8506A, and 8502A/AT programs
are generally compatible with the 8506A.
The few
areas that are not
compatible are
briefly
described below. Refer
to
appropriate areas
in this
table
for
a
more
detailed
description.
1
.
High
Speed
Mode
(!):
Some
High
Speed
mode
scaling factors
have been changed.
Also,
use
of the
reset
command
(*)
causes
the multimeter
to both
exit
High Speed
mode
and perform
a normal
reset.
2.
Range Commands:
Full
scale points
and
autoranging
points
have
been changed
in
several instances.
3.
Store
Zero
Commands
(K0,
K1
):
In
the
8505A/8506A,
the
temporary zero
correction values are set
to
0
when
the instrument
is
reset
or
powered
up {similar to the
8502A
without the calibration
memory
option).
In
the
8502A
with the calibration
memory
option, resetting
the instrument does
NOT
clear the stored zeros.
Interruption of input
power
could
affect
Calibration
Memory
entries
when
the
multimeter
is
in
Calibration
mode. Do
not cycle input
power
to
the multimeter
when
Calibration
mode
is
activated.
If
power
is
ON,
verify that
the
AVG/(CAL)
annunciator
is
not flashing before cycling
power
to
OFF.
From
the
remote,
Calibration
mode
status
can
be
verified
with the
G5 command
(response
of
0
=
mode
off,
response
of
1
=
mode
on),
if
power
is
OFF,
verify that
the
rear
panel
Calibration
switch
Is
off
before cycling
power
to
ON.
Both the
8505A and
the
8506A assume
the
same
configuration
at
power up
as that
described
for
8502A,
with the
following exceptions:
1.
The
Average
mode
is
disabled (OO).
2.
Calibration
Memory
factors are retained
at
alt
times.
These
factors
include zero corrections for each
range
in
dc
volts
and
ohms
functions, gain corrections
for
each range
in
each
function,
and
the
calibration
date
(or
instrument
identification)
number.
3.
External Reference
at
power up
or reset
is
used
as
temporary storage
for
the multimeter software version
number.
The
GNR
command
can then be
used to
recall this
number.
Any
use
of
the
X command
subsequent
to
power-up
or reset replaces
this
number
with the value applied
at
the external reference
inputs.
4.
Zero
mode
is
enabled
with
all
temporary zero correction values
set
to 0.
HIGH SPEED
MODE
Selection
of the
High Speed
mode
sets
the following conditions:
1.
The "!"
command
both enters the
High Speed
mode
and
triggers a reading.
2.
Use
of
any
character
(or bit
pattern)
other than "?"
causes
the
multimeter
to exit
the
High
Speed mode. Use
of
causes
the multimeter
to
both
exit
the High
Speed
mode
and perform a normal
reset.
The
character
used
to exit
High
Speed mode
must be sent by
itself.
Any commands
to
be executed
after
exiting
High
Speed mode
must be
sent
in
a separate transmission
(i.e.,
in
a separate statement
in
the instrument controller program).
3.
Selection of
High Speed
mode
specifies the
binary output
format.
Any
previously selected
output format
is
restored
once High Speed
mode
is
exited.
4.
The
multimeter
front panel display
is
blank while High Speed
mode
is
on.
The
previously selected display
mode
is
restored
once High Speed
mode
is
exited.
2A-22