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Toggled on/off means pressing
Controlled by key means pressing
it to return to normal operation.
The actual value of electronic short depends on the mode and range that are active when the
short is turned on. Its basic limit is the maximum power range the Load can supply. In CC
mode it is equivalent to the programming of maximum current under maximum power limit.
In CR mode it is equivalent to the programming of minimum resistance for present resistance
range. In CV mode it is equivalent to the programming of zero voltage. Turning on the
short circuit does not affect the programmed setting, and the Load input will return to the
previous programmed values when short circuit is turned off.
Note that turning on the short circuit may cause the Load to sink so much current to trig
protection circuit, and will turn off the Load.
NOTICE
In order to prevent the voltage transient of UUT from damaging the Load, the electronic short
function is not available in CC mode for L range.
3.11 Load On/Off
A module's input can be toggled on/off through the
panel, or the
key on module, or the remote control.
LOAD
done according to the slew rate.
Turning off the load does not affect the programmed setting. The load will return to the
previous programmed values when the Load is turned on again.
3.12 Protection Features
Each load module has the following protection features: Over voltage, Over current, Over
power, Over temperature, and Reverse Voltage.
The appropriate bits in the Mainframe's status registers are set when any of the protection
features listed above is active. The Load's buzzer will beep to inform you till the protection
status is reset. When any of the protections occurs, the Load input will turn off.
Over voltage
The over voltage protection circuit is set at a level slightly above the voltage range
specified in the Load specification. The over voltage (OV) and voltage fault (VF)
status register bits are set when the OV condition occurs and will remain set till they are
reset. The Load module will appear OVP when over voltage protection occurs.
Over current
When the Load is operating in CR or CV mode, it is possible for a module to attempt to
sink current more than it is rated for. The limit level of current is set at a level slightly
once to enable short circuit, and again to disable.
SHORT
and holding it to enable short circuit, and releasing
SHORT
ON/OFF
Operation Overview
key on the Mainframe front
The on/off change for input is
3-11
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