Tektronix Keithley 2268 Series, Справочное руководство

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Remote Operation Series 2268 850 Watt DC Power Supplies Reference Manual
160 2268S-901-01 Rev. A / January 2015
CONFIGURE OTHER PROTECTION MECHANISMS
Foldback Protection
Foldback protection causes the output of the power supply to shut down if the selected
regulation mode is entered and the configured delay time expires. A delay time may be
specified as well. The only way to clear foldback is by pressing the rotary Adjust/Enter
control for 3 seconds and executing the Clear command.
Command:
[:]OUTPut[<channel>]:PROTection:CLEar
Setting the Foldback Mode
The following command will set the foldback mode. The mode selected by the character
mnemonic sent will indicate which mode will trigger the foldback alarm to begin counting.
For example, if the command is sent with the CV mnemonic and the output is enabled with
no load attached (open circuit), the unit will operate in constant voltage mode and the
foldback counter will begin counting. If the CC mode was set and the output was enabled
with no load connected, the unit will operate in CV mode and the foldback counter will not
trigger.
To set the foldback mode, send the command:
Command:
[:]OUTPut[<channel>]:PROTection:FOLDback {?|CC|CV|NONE}
Where:
NONE indicates foldback protection is disabled.
CC indicates the supply will shut down due to constant current condition.
CV indicates the supply will shut down due to constant voltage.
The default value is NONE.
To set the foldback delay, send the command:
Command:
[:]OUTPut[<channel>]:PROTection:FOLDback:DELay <delay_time>
Where:
<delay_time> is a value in the range of 0.5-50 seconds. The unit of second is the
default and no units should be used with this parameter. (Increments of 0.1 seconds are
allowed.). The default value is 0.5 seconds.