A PHOTOMETRIC PROCESS MEASUREMENT ARRANGEMENT AND A PHOTOMETRIC MEASUREMENT METHOD

A photometric process measurement arrangement (10) comprising a photometric immersion probe (20),the photometric immersion probe (20) comprising a photometer flashlight source (61) for providing photometric light impulses,a photometric detector arrangement (70) comprising at least two separate wavelength-selective detection elements (71, 72, 73), anda photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70),the photometer control (80) comprising:impulse signal integrators (81', 82', 83') for integrating the electric impulses having the impulse intensity (Ui) generated by the detection elements (71, 72, 73) of one impulse integration cycle (204; 221; 264), a measurement cycle control (90) for adapting the total number of integrated cycle impulses of an impulse integration cycle (204;221;264) to the impulse intensity (Ui) of the single electric impulses,A/D-converters (81, 82, 83) for converting the voltages of the impulse signal integrators (81', 82', 83') in an A/D conversion interval (100) after the impulse integration cycle (204;221;264),a flashlight driving module (120) for controlling an impulse ignition switch (36) triggering the photometer flashlight source (61) with an impulse frequency (fi) during the impulse integration cycle (204; 221; 264), and a flashlight thermal management module (130) for balancing the number of photometric light impulses within a time frame (F), for example, by adding an adapted pause interval (303;311) between the impulse integration cycles (204; 221; 264) depending on the number of integrated cycle impulses, so that the total number of photometric light impulses within the time frame (F) is substantially constant.