Guarding And Shielding; Test Fixture - Keithley 2657A Reference Manual

Model 2657A High Power System SourceMeter® Instrument Reference Manual
2a

Test fixture

interlock
switch
connections

Guarding and shielding

You can optimize source-measure performance and safety with the effective use of guarding and
shielding (noise and safety shields).
Safety shield
A safety shield must be used whenever hazardous voltages (>30 V RMS, 42 V peak) will be present
in the test circuit. To prevent electrical shock that could cause injury or death, never use the Model
2657A in a test circuit without a properly installed and configured safety shield.
2657A-901-01 Rev. B/December 2012
Figure 17: Three-terminal device connections using two SMUs: connections
3
D IG
IT A
L I/
O
D IG
IT A
L I/
O
H I
L O
/ H I
S L
O
5
6
4 *
5
1
L O
8
2b
WARNING
Section 2: General operation
LI
N E
SL FU
5. 0 O W SE
A, B LO
LI N E 25 W
10 R AT 0 V
0-
50 24 0 VA IN G
35 , 60
0 VA C
H z
M AX
.
IE
EE
-4 88 D IG D IG
IT A IT A
L I/ L I/
DI G IT
O O
! AL
I/O
LA
N
R S-
23
2
!
W
A R
N IN
G : N O
SE IN
R EP R VI TE
C E R N
LA BY AL
C E Q U O PE
FU AL R AT
SE IF O R
W IE
IT H D PE SE LO
SA R SO R VI 25
M E C EA MA 0 V
TY N N BL X.
PE EL E
AN O N PA SE NS
D LY R TS LO E
R AT . ,
IN
G .
LO 30
30
M AX VD C
.
HI
IN
PU
T/ O U
TP
U T G UA
C U RD
R R
EN
T: 12
0 m
A SE
M AX NS
HI E
.
!
6
* Additional connections
for redundant protective
earth (safety ground)
may be required
10
D IG
IT A
L I/
O
9
7
2-55