User Manual

13-10 Digital I/O Port, Output Enable, & Output Configuration 2400 Series SourceMeter
®
User’s Manual
• The programmed V-Source value remains on the display.
• Internally, the V-Source is set to 0V.
• The current compliance setting remains the same as the output-on value.
Real and range compliance detection remains active.
• Measurements are performed and displayed.
When the I-Source is the selected source:
• The programmed I-Source value remains on the display.
• Internally, the V-Source is selected and set to 0V.
• Current compliance is set to the programmed Source I value or to 0.5% full
scale of the present current range, whichever is greater.
• Measurements are performed and displayed.
While in the ZERO output-off state, the SourceMeter can be used as an I-Meter.
The ZERO output-off state can also be used with the V-Source and Output Auto-
Off to generate very quick pulsed voltage waveforms. For example, with Output
Auto-Off enabled, you can generate 0 to +5V pulses. While in this relatively low-
impedance output-off state, the SourceMeter will be able to quickly dissipate
(sink) current caused by high input capacitance (i.e., cable capacitance) or an
external source. This results in fast settling time. If you instead used the NORMAL
output-off state for this application, current would dissipate very slowly (slow set-
tling time) resulting in distorted pulses.
WARNING Hazardous voltages (30V rms) can appear on the selected
INPUT/OUTPUT LO terminal when generating quick, pulsed
waveforms using the ZERO, AUTO-OFF output state. To elimi
-
nate this shock hazard, connect the LO terminal to earth
ground. If using the front panel terminals, ground the front
panel LO terminal. If using the rear panel terminals, ground the
rear panel LO terminal. The ground connection can be made at
the chassis ground screw on the rear panel or to a known
safety earth ground.