Setting Limit Values
The limit function limits the instrument's output to prevent damage to the load. You should specify
limits before applying output to the load, but you can set limits with the OUTPUT on. Note that the limit
value takes precedence over the setting value for voltage and frequency. If the current setting value
exceeds the limit range when the voltage or frequency limit value is changed, the setting value
(voltage or frequency) is set to a limit value that is closest to the current setting value.
Current limit value and current limit operation
The instrument has programmable AC and DC current limits. If the load attempts to draw more
average DC current or RMS AC current than the programmed limit, or if the unit attempts to draw
more peak current than the system-defined peak limit, the instrument will take action to prevent
excessive current.
The current detection response is not instantaneous.
If the instrument draws average DC current or RMS AC current that exceeds the limit, it displays OC in
the Status field and sets the CL-RMS bit (bit 12) in the STATus:QUEStionable register.
If the instrument detects peak current exceeding the limit, it displays OCPK in the Status field and sets
the CL-PEAK bit (bit 10) in the STATus:QUEStionable register.
Front Panel:
[Menu] > Protect > Current
or
[Menu] > Output > Current
Both of the above sequences set the same current limits.
SCPI:
The voltage output reduces the current without tripping the output.
[1]
The output turns off after the voltage reduction continues for a given period.
[1]
Calculated for the RMS value. Due to the relation between the processing time of measurement and
the voltage resolution, it may take a few seconds to exceed the current limit.
Whenever the instrument detects peak current exceeding the limit, it raises an OVERLOAD warning,
and sets the CL-PEAK bit (bit 10) on the STATus:QUEStionable register.
The current limit value of the output current can be specified as shown in the following table.
Keysight AC6800B Series Operating and Service Guide
79
2 User Information
Summary of Contents for AC6801B
Page 1: ...Operating and Service Guide Keysight AC6800B Series Basic AC Sources...
Page 16: ...AC6802B 1 Getting Started 16 Keysight AC6800B Series Operating and Service Guide...
Page 17: ...AC6803B Keysight AC6800B Series Operating and Service Guide 17 1 Getting Started...
Page 18: ...AC6804B 1 Getting Started 18 Keysight AC6800B Series Operating and Service Guide...
Page 62: ......
Page 196: ...4 Calibration Verification and Service 196 Keysight AC6800B Series Operating and Service Guide...
