Control Of Computing Functions - Datron 1061A User Handbook Manual

Control
of
computing
functions
Keyboard. The
DVM
will
place
itself
into
keyboard
mode
on
receipt
of a K, enabling the
entry
of
math,
limit
and
calibration constants via
the bus.
The
constant
may
be expressed
in
numeric
or
scientific
notation as
±1.88888(88)E±08.
If
a
two
digit
exponent
is
used
the
first
must
be
zero.
To
exit
keyboard mode
the
constant entered
must
be placed
in
an
appropriate
store or
used
in
calibration.
NOTE:
The
constant entered
in
not
shown on
the front panel display.
Store. LI through
to
L4
inform the
instrument of
the store
location
for
the entered
constant or
alternatively,
if
used without keyboard
mode,
the
location for the previous valid reading.
L0
deselects limit
operations
and
resets
max/ min
stores.
A
new max/ min
value will
be stored
on
completion
of the next
valid reading.
Store L5
is
only accessible after
A3
is
programmed
(1071 only).
i.e.:
A3,
L5,
N1
19,999
sets
new
block
size
on
1
19,999
Recall stores.
The
current contents of the four
stores
can be displayed
on
the front
panel
and
output via the
bus with
the
commands
VI through
to
V4
having
the format:
±1.88888(8)E±88L2CrLf.
^
store location
NOTE:
1.
The
output of the
stores
is
not
available
in
binary output
modes.
2.
It is
recommended
that after
the
recall
of
a store
value the
trigger
mode
is
reprogrammed.
3.
Recall of
empty limit stores
will
result
in
ERR
2
being
output.
1071 only
Recall store
V5
recalls
block
size
but
does not
display
block size unless
preceded by A3,
i.e.
A3V5.
Maths
mode.
Programming
Ml
to
M3
causes
the
reading
to
be
offset,
divided
by or both
offset
and
divided
by
the
contents of
stores
B and
C
respectively.
M0
places the
instrument back
to
its
normal
operating
mode.
Max/min.
The
maximum
or
minimum
reading
since the stores
were
last
reset
is
output
in place of
the
current reading
when
N
1
orN2
are
programmed.
N3
computes
the difference
between
maximum
and
minimum.
N0
places the
instrument back
to
its
normal operating
mode.
Reset of
stores
occurs
automatically
on changing
function
and
entry or
exit
from
ratio
and
programming
L0
or
superfast
mode.
1071 Average
Modes.
Programming A1
on
the
1071
selects
Continuous Average mode,
A2
selects
High Resolution "Rolling Average'
mode
without switching
in
the
input
filter,
and
A3
selects
Block
Average mode.
Each
of these
commands
extends the
reading
to
7
Vi
digits for
DC
Voltage
and
Resistance
measurement
(see Section
3).
dB.
On
the
1061 and
1061 A, A1
selects
the
dB
mode
(see Sect.
3).
The
reading
is
displayed
in
terms of
dB
and the
output format
is
modified
to:
±1.88888E±88DBCrLf
High
Resolution.
Functions FI and
F3
(k
£2
and
DCV), on
1061
A
only,
may
be
programmed
by
A2
to
select 6/2 digit
resolution.
Unlike
manual
operation,
this
is
not linked
to 'Filter'.
See 'Output
Notation'
for the
output
string
format.
Ratio.
Setting the signal
input switch
on
the
rear
panel
to rear input
and
programming
rear input
with PI or
P2
configures the
DVM
into the
ratio
mode. PI
when
next triggered initiates
two
readings, the
first
from the ratio (reference)
input
and
the
second
from
the rear
(signal) input.
P2
requires
two
triggers,
the
first
to
take a reading
from
the ratio
input (an
SRQ
being generated
on
completion) and
the
second, a reading
from
the
rear input.
The
ratio
is
then calculated
and
made
available for
output
as
a 'per unit' (p.u.)
quantity,
the
format
being:
±1.88888E±88PUCrLf
Ratio
measurements can also be taken
from
the
front
panel terminals
by inputting
two
successive
readings the first
of
which
is
used as
reference.
P0
returns the
instrument
to
normal mode.