4 - Instrument overview
Front Panel
11
SMU4000 Series Instruction Manual
⑥ Run Key
The Run key enables the output and executes the present configuration.
⑦ Test Key
The Test key performs a quick internal self-calibration and measurement zero. See
for more details.
⑧ Help Key
The context sensitive help key provides direct assistance with menus, settings, and parameters.
⑨ Terminals
The front input terminals are 4mm safety sockets on a 19mm pitch designed to accept 4mm
safety plugs with fixed or retractable shrouds.
WARNING
Only ever use either the front or rear terminals, never use both at once.
Hazardous voltages
will appear on both sets of terminals.
SMU4201 Front and Rear Terminal Blocks
, Main/ Force(F), Sense(S) and Guard(G) can be set
and operate at voltages up to 210Vpeak
. Voltages
greater than 60V are deemed hazardous
voltages.
Only use test leads conforming to IEC61010-031.
Always make connections to the instrument with the OUTPUT off
and in the Open off state;
this is the only output state that completely isolates the external circuitry from the
instrument.
CAUTION
All terminals are rated to 300Vpeak with respect to earth ground. Safety will be maintained if
voltages up to 21Vpeak for SMU4001 or 210Vpeak for SMU4201, are accidentally applied
between inappropriate terminals in excess of their marked ratings. The maximum differential
between MAIN HI and SENSE HI and MAIN LO and SENSE LO should be < 2Vpeak. The SENSE
terminals are protected against accidental connection of up to 21Vpeak for SMU4001 or
210Vpeak for SMU4201 between HI & LO.
Main- Main Terminals source or sink voltage or current.
Sense- Sense terminals measure voltage. The HI Sense terminal can be used as a guard in 2 Wire
+ Guard setups. 4 Wire setups use the HI & LO Sense plus the HI & LO Main terminals.
Ground- chassis ground for ground reference purposes only. See ‘
’ for more
details.
⑩ CV / CC LED indicator
When the output is running, the CV/ CC indicators show whether the instrument is in Constant
Voltage or Constant Current.