There is a bug in the firmware of the AL539, AL539B when you select continuity and measure the resistance for example 6 ohms it reads this as 1.6 ohms. When using other types of multi meters on continuity they will still reaad the correct resistance in while being in continuity mode....has anyone else spotted this fault?
Also why the small resistance measurement capability?
...Also in oscilloscope mode why does it not hold the min max values on screen for very long? a touch hold function would be useful to keep the min max and waveform on screen when probes are removed from circuit.
a graphing mode would also be useful graphing min max values against time down to 500us/div