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Low
resistance measurements have a huge range of applications, from
verifying busbar joints and evaluating the effectiveness of
bonding in earth systems to checking the resistance of cables and
components. Measuring low resistances accurately and reliably,
however, presents a number of challenges.
Foe
example, in some applications, such as the testing of welds and
bonding, high test currents are needed to obtain reliable results,
whereas in other applications, such as measuring the resistance of
cables, high test currents must be avoided because the heat they
generate will alter the resistance of the item under test.
Further, low resistance test sets need to be readily portable yet
rugged, as they are frequently used in demanding on-site
situations. To meet these requirements Megger has introduced a
family of portable digital low resistance ohmmeters. |
