Incorrect coil resistance reading on My Odyssey Mini Kit

I got an Odyssey Mini Kit with 1.8ohm Clapton coil, the Pegasus mini reads the value at 1.7x ohm all the time, it never reads 1.8ohm or above which is the correct resistance value of Clapton coil. Is anyone experience the same?

PS* I have tried this with several new Clapton coils, still getting 1.7x ohm.
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