Agilent Technologies N8900 series, Руководство по эксплуатации

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Programming Output Protection
Programming Output Protection
Set the Over-Voltage Protection
Set the Over-Current Protection
Clear Output Protection
The Agilent N8900 series power supplies have many protection functions. A front panel status indicator will turn on
when a protection function has been set. Most protection functions are latching, which means that they must be
cleared once they have been set. Of the following protection functions, only the OV and OC are user-programmable.
OV
Over-Voltage protection is a hardware OVP whose trip level is a user-pro-
grammable value. The OVP is always enabled.
OC
Over-Current protection is a user-programmable function that can be enabled or
disabled. When enabled, the output will be disabled when the output current
reaches the current limit setting.
OT
Over-Temperature protection monitors the internal temperature of the power
supply and disables the output if the temperature exceeds the factory-defined
limit. The OT protection is always enabled.
PF
Power-Fail indicates that a low voltage condition on the AC mains has occurred
and has disabled the output. The PF protection is always enabled.
MSP
Master/Slave Protection indicates that a fault has occurred in the paralleled
group. The outputs of all grouped units are disabled. MSP is always enabled.
Set the Over-Voltage Protection
The over-voltage protection will turn the output off if the output voltage reaches the programmed over-voltage limit.
The OVP circuit monitors the voltage at the + and – sense terminals if they are connected to the load, or at the output
terminals if the sense terminals are not being used.
Front Panel Menu SCPI Command
Select Protect\OVP
Enter the value in the OVP level box. Then
press
Select .
To set the OVP level to 55 volts:
VOLT:PROT 55
Set the Over-Current Protection
When over-current protection is enabled, the power supply turns off the output if the output current reaches the cur-
rent limit setting and transitions from CV to CC mode.
Front Panel Menu SCPI Command
Select Protect\OCP
Check Enable OCP . Then press Select .
To enable OCP:
CURR:PROT:STAT ON
54 Agilent N8900 Series Operating and Service Guide