This Article is about how to calculate the specifications for the Fluke-941.
Below are the specifications and how to calculate them for the Fluke-941.
+/-3% is calculated against the expected measurement of an incandescent lamp and +/-6% is the spec for all other light sources. The cosine error is an additional spec that's added if the customer is taking measurements a degree away from the intended target. As an example, if you are at a 30* angel from the incandescent lamp then the spec would be +/-5%.
The resolution of the five ranges is listed below.
The 20FC range has a 0.01FC resolution up to 9.99FC and above that up to 20FC the resolution changes to 00.1 FC.
The 200FC range has a 00.1FC resolution up to 99.9FC and above that up to 200FC the resolution changes to 000.1FC.
The 2000FC range has a 001FC resolution up to 999FC and above that up to 2000FC the resolution changes to 0001FC.
The 20000FC range has a 0001FC resolution up to 9999FC and above that up to 20000FC the resolution changes to 00001FC.
The 20LX range has a 0.01LX resolution up to 9.99LX and above that up to 20LX the resolution changes to 00.1LX.
The 200LX range has a 00.1LX resolution up to 99.9LX and above that up to 200LX the resolution changes to 000.1LX.
The 2000LX range has a 001LX resolution up to 999LX and above that up to 2000LX the resolution changes to 0001LX.
The 20000LX range has a 0001LX resolution up to 9999LX and above that up to 20000LX the resolution changes to 00001LX.
The 200000LX range has a 00001LX resolution up to 99999 and above that up to 200000LX the resolution changes to 000001LX.