In the last two years I have replaced 4 or 5 M AVO Megger MITs (forget the exact model) that failed after 3 years. Some of my older AVO Meggers are 25 years old.
Don't go with the 1587 as a straight up IR tester. As stated, it's a full bore DMM and IR function with it. You'll have to post alot more questions before a more direct answer can be made. Megger is top notch in equipment, and so is Fluke, but you should be more specific in what you want and what you'll be using it for.
Insulation tester is intended to be used on:
- PQ Audits
- Troubleshooting in industrial plants
- Installation of power protection equipment (SPD, UPS, etc)
Budget for this equipment is about $ 900.00.
Ric