Dm-15a is a 41 digit ohmmeter introduced by pla electro appliances. Five ranges are available from 200 mn to 2 kn. The resolution on 200 mn range is 10 un. Four wire measurement technique is used to measure low resistance values accurately. To reduce measurement time of very high inductive resistances, high voltage current source is provided. This mains operating instrument is well protected against back emf.
