2470 High Voltage SourceMeter Instrument Reference Manual
Section 5: Source-measure considerations
2470-901-01 Rev. A /
May
2019
5-11
Noise shield
Use a noise shield to prevent the introduction of unwanted signals into the test circuit. Low-level
signals may benefit from effective shielding. The metal noise shield surrounds the test circuit and
should be connected to LO, as shown.
Figure 96: Model 2470 rear panel noise shield connections
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 2470 in a test circuit that may contain hazardous voltages without a properly installed
and configured safety shield.
The safety shield can be metallic or nonconductive, and must completely surround the DUT test
circuit. A metal safety shield must be connected to a known protective earth (safety ground). See
(on page 4-14) for important safety information on the use of a metal or a nonconductive
enclosure.
