Agilent Technologies 4339B - Page 271

C
Overload/Over-Current/No-Contact
Operations
Table
C-1
shows
the
summary
of
operations
when
the
4339B
detects
O
VLD
(Overload),
Over-Current (exceeding
current
limit),
or
N.C.
(No-Contact).
(Measurement
parameter:
R)
Table
C-1.
O
VLD/Over-Current/N.C.
Operations
(Meas
.
parameter:
R)
Display
Handler
Output
GPIB
Output
1
Solutions
Data
Mode
Comprtr
Mode
<
stat >
2
:
1
O
VLD
O
VLD
LOW /LO <
data
>
:
9.9E37
Select
an
appropriate
measurement
range
.
(Overload) <
comp
>
3
:
4
/LO <
stat
>
2
:
4
Reduce
the
source
voltage
.
Over-Current O
V
CURR
LOW & <
data
>
:9.9E37
Check
whether
a
short circuit
is occurred.
/NOT
READY
<
comp
>
3
:
4
<
stat
>
2
:
2
Cancel
the
bad
contact
between
DUT
and
N.C. N.C. N.C. /NO
CONT
A
CT
<
data
>
:
9.9E37
contact-pin.
(No-Contact) <
comp
>
3
:
8
O
VLD
/LO <
stat
>
2
:
3
Select
an
appropriate
measurement
range
.
& O
VLD
LOW & <
data
>
:
9.9E37
Cancel
the
bad
contact
between
DUT
and
N.C. /NO
CONT
ACT
<
comp
>
3
:
12
contact-pin.
OVLD /LO < stat
>
2
:5 Select an
appropriate
measurement
range
.
& O
VCURR
LOW & <
data >
:
9.9E37
Reduce
the source
voltage
.
Over-Current /NOT
READY
<
comp
>
3
:
4
Check
whether
a
short
circuit
is
occurred.
1
Refer
to
:FETCh?
in
Chapter
5
2 Measurement
status (0:Normal,
1:Overload, 2:No-Contact,
4:Over-Current)
3
Comparison
result
(1:In,
2:High,
4:Low
,
8:No-Contact)
Note
When
two
or
more
phenomena
are
detected
at
the same
time,
< stat
> and
< comp
> of
the GPIB
output are
the sum
of the
numbers
which
show
each
phenomenon.
F
or
example
,
when
O
VLD
and
N.C.
are detected
at
the
same
time, the value of
< stat > is 1(O
VLD)+2(N.C.)=3, the value of
< comp > is
4(Low)+8(N.C.)=12.
Overload/Over-Current/No-Contact Operations C-1