Keysight Technologies 3458A Guide D'utilisation page 54

2 Getting Started
If any of the tests failed, the ERR annunciator illuminates and the display shows:
If the self-test failed, one or more error conditions have been detected. Refer to
the next section
Reading the error register
Whenever the display's ERR annunciator is illuminated, one or more errors have
been detected. A record of hardware errors is stored in the auxiliary error register.
A record of programming and syntax errors is stored in the error register. To read
the error record(s), press:
The lowest numbered error and a description of the error is displayed. For
example, a possible error message is:
Use the right arrow key to view the entire message. When the error message has a
100-series numeric prefix (e.g., 105), it indicates a programming or syntax error. A
200-series prefix (e.g., 209) indicates a hardware error.
When you get a hardware error (200-series prefix), run the self-test again. If you
NOTE
repeatedly get the error, the multimeter may need repair.
If the ERR annunciator is still illuminated, more errors have been recorded. Repeat
the above key sequence until all errors have been read and the ERR annunciator is
no longer illuminated. When you have read all the errors, the error annunciator
goes off. If you try to read another error, the display shows:
54
Reading the error
Error
_
register.
Keysight 3458A User's Guide