Keithley 237 - Page 94

SECTION2
Operation
2.1
0.8
Factory
Initialization
When
powered
up,
the
Source
Measure
Unit
will,
for
the
most
part,
initialize
to
whatever
was
previously
pro-
grammed.
These
are
the
power
up
default
conditions
and
are
summarized
in
Table
2-5. A
checkmark
(...f)
indicates
that
the
unit
will
initialize
to
whatever
was
previously
programmed.
The
Source
Measure
Unit
can
be
returned
to
factory
de-
fault
conditions
which
are
also
listed
in
Table
2-5.
Perform
the
following
steps
to
initialize
the
unit
to
fac-
tory
default
conditions:
1.
With
MENU
enabled,
use
the
rotary
knob
to
display
the
following message:
+
FACTORY
INIT
2.
Press
ENTER.
The
Source
Measure
Unit
will
initial-
ize
to
the
factory
default
conditions
listed
in
Table
2-5.
3.
If
no
other
menu
actions
are
to
be
taken,
disable
MENU
to
return
to
the
source-measure
display
state.
IEEE-488
Bus
Operation
The
JO
command
is
used
to
restore
factory
default
condi-
tions.
HP
BASIC
4.0
Programming
Example:
OUTPUT
716;
"JOX"
Restores factory
de-
fault
conditions
Table
2-5. Factory
and
Power-up
Default
Conditions
Factory
Default
Autorange
(Measure)
Disabled
Bias
(de
Function)
Source
value
OV/OmA
Source
range
llV
(236, 237); 15V (238)
I lOrnA
De
delay
value
Omsec
Calibration
Step** 0
Compliance
Value
lOmA/lOV
Range
lOmA/llV
(236,237); 15V (238)
Default
delay
Enabled
EOI
and
bus
hold-off** EOI
enabled,
hold-off
on
X
Filter
Disabled
Function
de
llOOV
Range
Control**
236/238
Disabled
237
Enabled
v
User's
previously
programmed
condition
•
Front panel only
**IEEE-488
Bus only
2-42
+
Power
up
Default
...j
...j
...j
...j
0
...j
...j
...j
EOI
enabled,
hold-off
on
X
...j
de
Disabled
...j