HP 8112A Operating, Programming And Servicing Manual page 47

E21
Fail Output Amp +ve Offset test
E22
Fail Output Amp -ve Offset test
E31 E39
to
Fail Overall tests
E41/42
The output amplifier is faulty.
E51 52
and
Fail Burst Counter tests
Refer to Chapter 10.1
error codes and their causes.
When the self-test is completed successfully, the instrument
automatically assumes the operating state which was active when
it was last switched off, excep' t that the output is disabled to
protect the unit under test. If the instrument battery has failed, the
Standard Parameter Set is selected.
Troubleshooting for more information on the
Operating 4-3