Keysight 34420A Service Manual page 107

3 Calibration Procedures
Table 3-6 Self-test error messages
Error Error message
601 Front panel does not respond
602 RAM read/write fail
603 AID sync stuck
604 AID slope convergence failed
605 Cannot calibrate rundown gain
606 Rundown gain out of range
607 Rundown too noisy
608 Serial configuration readback failed
609 DC gain ×1 failed
610 DC gain ×10 failed
611 DC gain ×100 failed
613 Ohms 5 μA source failed
614 Ohms 10 μA source failed
615 Ohms 100 μA source failed
616 Ohms 1 mA source failed
617 Ohms 1O mA source failed
618 Ohms 20 mV voltage clamp failed
619 Ohms 100 mV voltage clamp failed
620 Ohms 500 mV voltage clamp failed
621 Low impedance DC gain ×100 failed
622 High impedance DC gain ×100 failed
623 Cannot calibrate precharge
624 Unable to sense line frequency
625 I/O Processor did not respond
626 I/O Processor failed self-test
106 Keysight 34420A Service Guide