Volts and Ohms Measurements 3-5
Step 5 Connect the DUT to the electrometer
NOTE Fundamental information on making connections to the electrometer input is pro-
vided in Section 2 (“Connection Fundamentals”).
WARNING A metal safety shield is required whenever a hazardous voltage (>30V) is
present on a noise shield or guard shield. As shown in Figures 3-2 and 3-3,
the safety shield must be connected to safety earth ground using #18 AWG
wire or larger.
Unguarded connections — Connections for unguarded volts and ohms measurements are
shown in Figure 3-2, where the DUT is the voltage or resistance to be measured. If a hazardous
voltage (>30V) is present on the noise shield, or the test circuit is floating above earth ground at
a hazardous voltage level, a safety shield must be used as shown.
RS232DIGITAL I/O
PREAMP OUT
250V PK
2V ANALOG
OUTPUT
COMMON CHASSIS
120
FUSE LINE
630mA
LINE RATING
50, 60Hz
60 VA MAX
T
(SB)
100 VAC
120 VAC
315mAT
(SB)
220 VAC
240 VAC
INPUT 250V PK
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
TRIGGER LINK
!
!
MADE IN
U.S.A.
V, GUARD
(PROGRAMMABLE)
OFF
ON
GUARD
(FOLLOWS
INPUT)
(INTERNAL)
INPUT PREAMP
10K
PREAMP
OUT
2V ANALOG
OUTPUT
COM
DUT
Black (LO)
Red (HI)
237-ALG-2
Cable
Metal Noise Shield
Metal Safety Shield
6514 Rear Panel
Safety
Earth
Ground
Green
(Chassis)
GRD Disabled
Figure 3-2
Connections for
unguarded volts and
ohms
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