In our lab we have three HP34401A with the same strange behaviour:
- secondary of trasformer with full vawe rectifier, ohmic load, measuring the voltage on the load with the multimeter all ok, the multimeter does autorange and make the correct measure
- secondary of transformr with half vawe rectifier, ohmic load, measuring the voltage on the load with the multimeter the display stuck on 80-90 mV, the autorange does not function, I have to manually change the range to see the correct value of measure
all three 34401 make the same,
checked the wave voltage on load with oscilloscope, all ok
I have try others multimeter, like FLUKE175, are functioning ok in all condition
Does anyone know or have observed same beaviour on HP34401A?