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Steve,
Just set it up again and ran a test. Ambient temp is 26 degC. Setpoint on the cold finger is 13 degC according to my TempTec device. The peltier is cooling for 15 secs on and 10 secs off and the temp is holding within 0.1 degC. Do you have concerns about the life of the peltier or the relay with this mode of operation? I haven't opened up the case yet but suspect I set it for minimum hysteresis.
Hope this helps.
Peter
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