Wow, cracking service from an eBay seller, that Robin insulation tester I purchased Sunday for just £22, currently on sale on RS and other places for £342, was dispatched yesterday allegedly by 2nd class recorded post, arrived today and was just as advertised, missing its soft case, probes and battery cover.
Stuffed 6 AA batteries in it and powered it up, perfectly working, grabbed the Avo and done a insulation test on those pesky switch contact rings, and I got a reading of >2.2G ohms @ 1031V, winner, winner, chicken dinner. Also did a insulation test between the various cores of the ribbon cable (spec says rated @ 300V) and I got readings no less than the resistance of the range resistors connected across them and that was also @ 1031V so a I'm a very happy bunny indeed.
The bonus feature of this tester is that it provides extremely stable test voltages of 264V, 525V and 1031V so can also do double duty as a more than adequate voltage reference for calibration of my bench meters, whats not to like