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I have an RTD data logger, when I real time record the display value is the correct temperature. If I try to start the device, after I download the data I get -200 for all logged readings.

If your RTD data logger appears to be logging -200 Celsius readings it could indicate that either the probe has become disconnected from the circuit board, or there is a problem with the memory chips. Contact MadgeTech for RMA service.

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