would be nice to exactly know what you want to do .. are you an electrician, cable guy etc ...
volts ohms ... okay but
you can climb an ladder with an instrument and one hand, if you dont play stupid, i was a optical fiber tester with exfo ftb machines strapped on belt, bigger than a dmm
never had any problems .... and when you're up and stay still
1st you need dedicated gear / harness and you use another strap to be locked on the ladder and you can safely extend yourself to do the tests
if you don't know the basics on how climb and stay on a ladder, do nothing
oh here in Quebec Canada, if you play monkey and hurt yourself while being on company materials like phone poles, electricity poles etc ... , you may be sued ...