Transformer ohmmeter
MTO210
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Direct 2-channel digital reading (1 µΩ to 2000 Ω)
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DC test current up to 10 A maximum
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0.25% measurement accuracy
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Integrated demagnetization feature
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Tests operation of on-load tap-changers
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Very fast auto safety discharge circuit
The MTO210 transformer ohmmeter is a line-operated, field-portable instrument designed specifically to measure the dc resistance of all types of magnetic windings safely and accurately. It can test transformers and rotating machine windings and perform low-current resistance measurements on connections, contacts and control circuits.
The Transformer Ohmmeter is extremely useful when testing the windings and contact resistance of tap-changers with “make-before-break” contacts and voltage regulators. This action will check for pitted or misaligned contacts as the instrument will give an indication if either condition occurs.