GSM-20H10 User Manual
35
Sense Connect Methods
Description Basic source-measure operations are performed using
either 2-wire local sense connections or 4-wire remote
sense connections. The factory default sense selection
is local.
Note: The front panel terminals are isolated
from the rear panel terminals. Therefore, if you are
using the front panel terminals, ground the front
panel LO terminal. If using the rear panel terminals,
ground the rear panel LO terminal.
Connections alone do not determine sense mode. For
local sensing, 2-wire sensing must be selected from
the Sense mode option from front panel parameter
setting area. For remote sensing, 4-wire sensing must
be selected. The 2-wire sense mode is the BENCH and
GPIB default.
WARNING: There is no internal connection
between earth ground and INPUT/OUTPUT LO
terminal of the GSM.Therefore, hazardous voltages
(>30V rms) maybe appear on that LO terminal.
Typically, this can occur when the GSM is operating
in any mode where the output changes rapidly, such
as quick, pulsed waveforms that can be generated
using the ZERO, AUTO-OFF output state, or fast
pulse sweep operations.
To prevent this from occurring (if your application
allows it), connect the INPUT/OUTPUT LO terminal
to earth ground. You can connect the LO terminal to
the chassis ground screw terminal on the rear panel,
or to a known safety earth ground.
