Keysight N3300A - Querying and Clearing Output Protection and Errors; Making Basic Front Panel Measurements

Front Panel Operation - 5
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5 - Querying and Clearing Output Protection and Errors
When overvoltage, overcurrent, or overtemperature condition occurs, the Prot annunciator on the front panel
will be on and the electronic load will disable its input.
Error messages can occur at any time during the operation of the unit. When the Err annunciator on the front
panel is on, it means that either an error has occurred on the GPIB bus, or a selftest error has occurred. Appendix
B in the Programming Guide lists error numbers and descriptions.
Query and clear the electronic load overcurrent protection as follows:
Action Display
1.
On the Function keypad, press Protect. In this example, an overcurrent condition
has occurred.
OC
2. To restore normal operation after the cause of the overcurrent condition has been
removed, press Shift, Prot Clr. The Prot annunciator then will go off.
Query and Clear Errors as follows:
1.
On the Function keypad, press Shift, Error. This displays and clears the error in
the error queue. Repeatedly press these keys to clear all errors in the queue. If errors
persist, your unit may require service.
ERROR 0
6 - Making Basic Front Panel Measurements
As shipped from the factory, front panel measurements for the input are calculated from a total of 1000 readings
taken at a 10 microsecond sampling rate. The unit alternates between voltage and current measurements.
Therefore, the data acquisition time for a single front panel voltage or current measurement is 10 milliseconds. It
takes an additional 2 milliseconds to calculate the results.
The front panel display updates at a fixed rate of 50 milliseconds per measurement. However, you can program
both the sampling rate and the number of data points in each front panel measurement using commands in the
Sense menu. With this flexibility, measurement accuracy can be improved for waveforms with frequencies as
low as several Hertz. The sample buffer size may be varied from 1 to 4096 data points. The sampling rate may
be varied from 10 microseconds to 32 milliseconds. Values are rounded to the nearest 10 microsecond interval.
To have the unit turn on with the reconfigured buffer size and sampling rate, save this state in location 0.
NOTE: If the front panel display indicates OVLD, the input has exceeded the measurement capability
of the instrument. This can occur when the measurement has been set to the Low range. If the
front panel display indicates -- -- -- -- -- -- , a GPIB measurement is in progress.
Use the Meter menu for making front panel measurements:
Action Display
1.
On the Function keypad press Meter to access the following measurement
parameters:
Displays the voltage and current of the selected channel
Displays the maximum voltage
Displays the minimum voltage
Displays the rms voltage
Displays the maximum current
<chan> <voltage> <current>
<chan> <value> V MAX
<chan> <value> V MIN
<chan> <value> V RMS
<chan> <value> A MAX