Reading The Error Register - Keysight 3458A Assembly-Level Repair Manual

2 Operating Information
When self-test passes, you have a high confidence that the multimeter is
operational and, assuming proper calibration and autocalibration, that
measurements will be accurate.
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
40
Reading the error
Error
_
register.
Keysight 3458A Assembly-Level Repair Manual