Keithley 2657A

Section 2: General operation Model 2657A High Power System SourceMeter® Instrument Reference Manual
2-50 2657A-901-01 Rev. B/December 2012
Refer to the following figure if using a test fixture with SHV connections.
Figure 15: Four-wire resistance connections (remote sensing with SHV cables)
LINE RATING
100-240 VAC
50, 60 Hz
350
V
A
MAX.
LINE FUSE
SLOWBLOW
5.0 A, 250 V
NO INTERNAL
OPER
A
TOR SER
VICEABLE
PA
R
TS,
SER
VICE BY
QUALIFIED PERSONNE
L
ON
L
Y
.
REPLACE FUSE WITH SAME TYPE
AND R
ATING.
WARNING:
INPUT/OUTPUT CURRENT: 120 mA MAX.
RS-232
DIGI
T
A
L
I/O
LAN
!
IEEE-488
!
!
SENSE
LO
HI
LO
GUARD
SENSE
HI
LO
3030 VDC
MAX.
250 V
MAX.
DIGITAL I/O
Test fixture
interlock
switch
connection
Sense Hi Sense LO
HI LO
DIGITAL I/O
!
SENSE
LO
HI
LO
GUARD
SENSE
HI
LO
3030 VDC
MAX.
250 V
MAX.
Model 2657A
+5 VDC
DIGITAL I/O
1
14
13
25
4 **
1
7
4 **
3
5
6
7
LO
Sense LO
HI
Sense HI
DUT
3
5
1
2 *
2
* Interlock switch shown
in OFF / lid open
position
** Additional connections
for redundant protective
earth (safety ground)
may be required
6
Ground symbols
Chassis
Protective earth
(safety ground)