Multimeters and test equipment.

[BillsGU]

This one in the Jaycar catalogue http://www.jaycar.com.au/productView...UBCATID=1062#1 looks like a pretty good unit, but does not measure micro amps.

And this one looks like a sturdier unit, but then again is something goes wrong, that's a lot of cash down the drain

http://www.ebay.com.au/itm/USB-HandHeld-Scopemeter-Oscilloscope-DMM-3-5-UTD1025CL-200MS-s-Multimeter-/121072540328?_trksid=p2054897.l4275

Of the three this one from China looks the best as far as specs go. It has a real CRO probe output for a start. The USB output should enable you to view the screen on a monitor or a laptop, which is a great help when looking at complex waveforms or pulses. Ask if the software is included.