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SECTION 1 THE
1081
AUTOCAL STANDARDS MULTIMETER
The
Datron
1081
6½/7½
digit AUTOCAL
STANDARDS microprocessor-controlled digital
~ultimeter
(DMM) is a high precision measuring
instrument.
It features exceptionally high stability
and
systems capability.
The
instrument provides
full measurement capability, computation facil-
ities,
self
check routines
and
calibration memory.
Standard
and
optional
measurement
facilities
The
instrument
is offered in two versions, either
complete
with all options
or
as
a basic
DC
voltage
instrument
to
which individual options can be
added
to
provide
further
measurements:
Resistance (including temperature)
True
RMS
AC
voltage
DC
coupled
true
RMS
AC
voltage
Ratio
o/o,
/J.,
/J._o/o
The
full
range
of
options
is
as follows:
Option
JO:
True
RMS
AC
Converter
Option
20:
4-Wire Resistance Converter
·
Option
40: Selectable Rear/Reference Input
Option
50:
IEEE
488-1978
Standard
Digital
Interface
Option
52:
Remote
Trigger
Option
70:
Analog
Output
Calibration
TheAUTOCAL instruments have been designed
to
make the removal
of
the covers for calibration
unnecessary, as full calibration_
of
all ranges
and
functions can be carried
out
from the front panel.
Theprocedure for calibrating
the
instrument
is
con-
tained
in
the Calibration
and
Servicing
Handbook.
Accidental
or
unauthorised use
of
the calibration
routine
is
prevented by a key operatedswitch
on
the
instrument rear panel.
Message read-out
The measurement display doubles as a message
display, providing a clear read-out
of
14
different
messages. Full details
of
the meanings
of
these
displays can be found in sections 2
and
3.
Self test
Pressing the '-+' then
'Test'
key starts a
self
test
procedure, during which a sequential routine:
-checks, in
turn,
all the display segments, char-
acters and legends
-verifies the correct functioning
of
individual
measuring circuits
-checks the
non
-volatile calibration
memory
Option
80: 115V 60Hz Line
Operation
Option
81: 115V
50Hz
Line
Operation
Option
82: 115V 400Hz Line
Operation
Option
90:
Rack
Mounting
Kit
On
completion
of
the test, theinstrument re
turn
s
to
thelast selected function
and
range to provide
rapid
return
to
measurement. In the event
of
the self test
failing, an
error
message
is
displayed.
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