All valid points but the main problem is the fluke itself. Great for voltage testers and clamp on meters terrible 17th edition mulifunction testers.
I was atesting manger and ordered 5 of these and within 12 months I sold them on E bay and went with meggar and kewtech .
the earler versions of the 1652 had conflict with poor terminals in the lead and the fuses were too tight and broke when they were removed.
I was also on a job that was in dispute and there were 5 testing engineers there all with flukes, as soon as I saw them I told them to do a test each and everyone gave them a different figure and when they repeated the test they all got different readings again, My test instrument confirmed the same test results everytime and dispute ended.
The tester is terrible and it is largely down to the poor zeroing.
Sorry to bring the bad news, get yourself a better tester.