Keysight E36731A Manuel D'instructions page 79

Load mode has additional fixed over-current protection that is always enabled. This protection will turn the out-
put off whenever the input current exceeds 105% of the high ranges and approximately 110% of the low cur-
rent ranges.
You can also specify a delay to prevent momentary CV-to-CC status changes from tripping the OCP. The delay
can be programmed from 0 to 0.255 seconds. You can specify if the start of the delay is initiated by any trans-
ition into CC mode, or only at the end of a settings change in voltage, current or output state.
OCP Delay
The instrument may momentarily cross into CC mode when it is turned on, when an output value is programmed, or
when the DUT is connected. In most cases these temporary conditions would not be considered an over-current
protection fault, and having an OCP condition disables the output when the CC status bit is set would be a nuisance.
Specifying an OCP delay will ignore the CC status bit during the specified delay period.
To set the over-current protection delay, enter the delay value in the OCP Delay field. The delay can be programmed
from 0 to 0.255 seconds.
OCP Delay Start
Specifying an OCP Delay Start lets the OCP circuit ignore the CC status bit during the specified delay period. Once
the OCP delay time has expired and if the CC mode persists, the output will shut down.
You can specify the OCP delay start timer through:
– CC Transition: Delay timer starts at any transition of the output into CC mode. Press OCP Start CC.
– Setting Change: Delay timer starts at the end of a settings change in voltage, current, or output state. Press
OCP Start Set.
OP Protection
Applicable for Load mode only.
With over-power protection enabled, the instrument disables the input if the input power exceeds 110% of the
instrument's power rating.
Press OPP State On to enable over-power protection.
Press OPP State Off to disable over-power protection.
OPP Delay
Specifying an OPP delay prevent the over-power protection function from being triggered during the delay time. This
prevents momentary input power spikes from triggering the over-power protection. A status bit (CP+) indicates that
the output has been turned off by a power limit condition.
To set the over-power protection delay, enter the delay value in the OPP Delay field. The delay can be programmed
from 0 to 0.255 seconds.
Keysight E36731A User's Guide 79