Welch Allyn/Hillrom-06138-000 Cal-Key, M690/692 

The Welch Allyn/Hillrom SureTemp Plus Calibration Key (06138-000) is a high-precision diagnostic tool designed to verify the accuracy of the SureTemp Plus 690 and 692 handheld thermometers. This essential accessory uses a fixed electronic resistance to simulate a specific temperature, allowing medical technicians and biomedical engineers to perform rapid functional verification without a water bath. By ensuring the thermometer displays a reading of 97.3 pm 0.3 F (36.3 pm 0.2 C), this tool helps facilities maintain compliance with Joint Commission standards and manufacturer-recommended maintenance intervals.