Another thing I did when starting in business (I was very poor and had to improvise) is an analog meter I put a DPDT switch on it. Then wired test leads to it. It was easy, flipping switch changes lead polarity.
That made a capacitor (condenser) tester.
I would put a capacitor across leads. A large one, say 1000 ufd, put meter on Rx1. Each flip would charge/discharge cap. So (example) 1 second per flip, meter reading half way, cap was good. Smaller caps like 10 ufd I'd use Rx100 scale, 0.1ufd...Rx1000.
Simple & cheap...but it works.