Keithley 237

SECTION2
Operation
Message
BUFFER FILLED
CAL
CONSTANTS
ERR
CAL INVALID ERR
DPRAM LINK ERR
DPRAM
LOCKUP
GENERATING SWEEP
IDOC
IDOCO
ILLEGAL
MEAS
RANGE
ILLEGAL
SRC
RANGE
INTERLOCK PRESENT
INVALID
SWEEP
MIX
IOU
CAL CHCKSUM
IOU
DPRAM FAILED
IOU EEROM
FAILED
LOG CANNOT
CROSS 0
MrnASRANGECHANGED
MUST
CREATE
SWEEP
NO
AUTO
IN
PULSE
NOT
IN
REMOTE
OFLO
PENDING TRIGGER
PULSE
TIME NOT
MrnT
TRIGGER OVERRUN
UN
CALIBRATED
VALUE OUT OF
RANGE
65.000 SECONDS
MAX
lF
2F
2-34
+
Table
2-3.
Display
Messages
Description
Number
of
generated
sweep
points exceeds
the
buffer capacity.
Power-up verification
of
cal constants finds
one
or
more values outside of prede-
termined limits; default value(s)
used
for values
out
of
limits.
One
or
more
cal errors present
on
power-up, DCL,
or
SOC.
Communication
error
in
the
dual
port
RAM between
the
1/0
controller
and
source/measure
controller.
Unit
is
not
functional.
ROM
or
RAM failure
in
source/measure
controller
so
it
is
not
responding to
1/0
controller.
Unit
is
not
functional.
Unit
is
creating
or
appending
a
sweep
from
the
front panel.
Unit
received
an
illegal device-dependent command.
Unit
received
an
illegal device-dependent
command
option.
Selected measure range
is
incompatible
with
source
(V
or
I)
or
unit
(236,
237
or
238).
Selected source range is incompatible
with
source
(V
or
I)
or
unit
(236, 237
or
238).
Attempted
to go into operate
with
an
interlock condition present,
or
an
interlock
condition exists while
in
operate.
Cannot
create/append
different
sweep
types (pulsed
and
non-pulsed)
in
buffer.
Power-up checksum test
of
cal constants failed.
Dual
port
RAM
in
1/0
controller failed. Unit
is
not
functional.
Electrically erasable
ROM
in
IOU
controller failed.
Unit
is
not
functional.
Cannot
create/
append
a log sweep
that
passes
through
zero.
Cannot
have
source
and
measure ranges
of
llOOV
and
lOOmA
(237),
or
llOV
and
lA
(238),
at
same time; measurement
range
lowered.
Attempted
to
append,
modify,
or
trigger a non-existent sweep.
Cannot
select source autoranging
with
a
pulse
sweep
create
or
append.
Sent
an
X
command
when
the
unit
was
not
in
remote
(REN
is false).
An
external
power
source
has
overloaded
the
measurement
hardware
in
the
Model236/237
/238.
Waiting to finish previous operation before processing trigger.
Specified pulse times
(toN
and
toFF)
cannot
be
met
and
will
be
extended.
Unit
was
triggered while still processing a previous trigger; trigger
is
ignored.
No
cal constants are stored
in
EEPROM (Source/Measure LED blinks).
Selected source value exceeds source range,
or
selected compliance value exceeds
measurement range,
or
incremental source values are too small for selected range.
Cannot
have
a
de
or
sweep
delay greater
than
65.000 seconds. Value defaults to
65.000
seconds.
Power-up
or
memory
test
of
IOU
RAM failed.
Unit
is
not
functional.
Power-U£_
or
memory
test
of
IOU ROM
failed.
Unit
is
not
functional.
+