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Using the Protection Functions
Protection Functions
Configuring Protection
Advanced Protection
Protection Functions
Each output has independent protection functions. A front panel status indicator will turn on when a
protection function has been set. Protection functions are latching, which means that they must be
cleared once they have been set.
Additionally, as explained under
protection fault occurs on one output, ALL outputs will be turned off.
Of the following protection functions, only OV, OV-, OC, OSC, PROT, and INH are user- programmable.
OV - Over-voltage protection is a hardware protection whose trip level is a programmable value. The
OV protection is always enabled.
OV− - Negative voltage protection is a hardware OVP. Applies to Keysight N6783A/84A, and N679xA.
OC - Over-current protection is a programmable function that can be enabled or disabled. When
enabled, the output will be disabled when the output current teaches the current limit setting.
OT - Over-temperature protection monitors the temperature of each output and shuts down the
output if any temperature exceeds the maximum factory-defined limits (see
OUTPut:PROTection:TEMPerature:MARGin? in the Operating and Service Guide document).
OSC - Oscillation protection shuts down the output if an oscillation is detected on the output. Applies
to Keysight N678xA SMU.
PF - PF indicates that a power fail condition on the AC mains has disabled the output.
CP+ - CP+ indicates that a positive power limit condition has disabled the output. This protection
function does not apply to all power modules. Refer to
CP− - CP− indicates that a negative power limit condition has disabled the output. This protection
function does not apply to all power modules. Refer to
PROT - Prot indicates that the output is disabled, either because of a coupled protection signal from
another output, or because the programmed watchdog time has expired.
INH - The Inhibit input (pin 3) on the rear panel digital connector can be programmed to act as an
external shutdown signal. Refer to
Keysight N6705C User's Guide
Output
Coupling, you can configure the instrument so that when a
Power Limit Operation
Power Limit Operation
Inhibit Input
for further information.
3 Using the Source/Load Functions
for further information.
for further information.
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