I downloaded the Custom MIB poller file (thanks to Alain for those) and am using the temp for APC ups and it was only when my manager queried why the temperature was being dispalyed as being about -10c that I realised that the custom MIB Alain had created had unit as F and once change to C displayed correclty and my manager breathed a sigh of relief.
Just a word of warning for future use of other users MIBs.
Jon
