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
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