AMETEK XG Family Programmable DC - Manual (Page 73)

Local Operation
M370430-01 Rev E 3-27
3
Using Over Voltage Protection (OVP)
The OVP circuit protects the load in the event of an analog
programming error, an incorrect voltage control adjustment, or a
power supply failure. The OVP circuit monitors the output voltage
at the output of the power supply and will disable the output
whenever a preset voltage set point is exceeded. You can set the
preset voltage trip point by using the 9-position mode control on
the front panel or via one of the remote programming interfaces.
To prevent accidental tripping of the OVP while setting up, the
firmware will prevent the OVP set point from being less than
105% of the voltage set point when in local set point control mode.
When the XG is in VAP mode for defining voltage set point the set
point limitation will be based on the VAP input signal level. The
user should note it is possible to trip OVP in this mode if the OVP
is configured when the analog programming source is off.
When the user attempts to configure an OVP setpoint that is less
than 105% of the voltage set point via the front panel the set point
will stop allowing the value to decrement. If the user attempts to
configure an OVP set point that is less than 105% of the voltage set
point via SCPI a -221, “settings conflict error” will be pushed onto
the error queue.