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Question about LTC2986

Hello,

I received a question about LTC2986 from our customer. He is checking LTC2986 by following setting.

When the customer sets YOKOGAWA 2553A to 0.0 deg C. The measurement result of LTC2986 is -0.5 deg C.

Then he sets 2553A to 100.0 deg C. The measurement result of LTC2986 is 99.5 deg C. There is -0.5 deg C offset.

Do you have any ideas for a cause of the offset? Can we correct this offset by resistor setting of LTC2986?

Best regards,

Akira