should never need calibrating. the only issue i have with my fluke is that the super cheapo leads don't fit it. it is indestructible, i treat it with the care of a claw hammer. i drop it regularly, you're always looking for a safe place to put it on a bike, and it always falls. been beating mine up for 10 years. changed the batteries a couple times, and probably 5 sets of leads. i do recommend finding a cheap small analog meter also - it doesn't need to be accurate at all - you just need it to watch the needle move up and down when you are playing with points, searching wire breaks, timing etc, instead of beeps/digital numbers scrolling too fast to read....
07 gasgas xc300-94 duc 900ss-86 morini camel (2)-84 IT200-83 IT175-78 guzzi lm1-77 pursang 250-76 morini 3 1/2 strada-76 frankentaco pursang 200-74 frankentaco pursang 200-74 morini 3 1/2 sport-74 mz ts250/0-74 puch 175 (3)-73 can-am 175tnt-71 guzzi frankeneldo-71 ossa Stiletto-70 frankentaco sherpa s(2)-66 morini corsarino(2)-63 morini corsaro + many more