Title: Calibrating a Fluke 62 mini with a 418X
Applies To: 4181 and 4180
Problem Description: The Fluke 62 mini has errors when trying to calibrate it.
The Fluke 62 Mini is a product that has been discontinued. It has a spectral response of 6.5 – 18 µm. This means increased uncertainty for its calibration. The 4181 is calibrated with an 8 – 14 µm radiation thermometer. This difference in spectral bandwidth between the Fluke 62 Mini and the transfer standard is the source of the additional uncertainty. This is typically a problem with measurements above 200 °C. We have observed a 25 °C error at 500 °C with one of these units.
Fluke has replaced the Fluke 62 with the Fluke 62 Max and Fluke 62 Max Plus which are 8 – 14 um instruments.