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Reference Thermometers Battery Life Notification
Fluke Calibration is voluntarily notifying customers of the upgrade of all 1523/1524 Reference Thermometers with firmware revision less than 1.05. This includes all units manufactured prior to April 2012. All units being sent to a service center for repair or recalibration will automatically be upgraded to firmware revision 1.05.
Please review the document above for complete details.