Guide to UV Measurement
Dynamic and Static Measurement
By the way they are applied, UV curing radiometers might be divided roughly into two groups: static and dynamic .
Dynamic measurements are made by devices, which move or are moved with respect to the lamps. The object is to emulate the surface to be cured, and the devices record the conditions of exposure they observe. They may be attached directly to the surface or, as in the laboratory, be passed under a lamp or lamps at controlled speeds to duplicate the exposure conditions.
Dynamic is this section should not be confused with the Dynamic Range of the Instrument.
Static measurements are made with the instrument positioned at a single location. Typically, the purpose of static measurement is to provide long-term information about the condition of a lamp -- any changes that may occur in the overall radiant power output, focus conditions, or changes in bulb or reflector. If the radiant energy detected is altered, then, by inference, it is altered at the work surface. Static measurement methods also include instruments with hand-held probes, which are inserted into the field of exposure. Static measurements can record irradiance at a location and spectral distribution, but not energy, because there is no relationship to an exposure time interval.