The flame photometer is a detection instrument widely used in the fields of energy, environment, medicine and other fields. It can analyze the composition of the sample by measuring the spectral signal generated by the combustion. Before use, the flame photometer need metrological calibration to ensure the accuracy and reliability of the measurement results.

For lab flame photometers, the metrological calibration mainly includes two aspects: the light output stability calibration of the lamp and the offset correction of the solution concentration measurement value.

The light output stability calibration of the lamp refers to determining the output spectrum stability of the lamp by comparing the light output values under different powers, and making necessary corrections. This calibration requires the use of a standard light source for comparison. Usually a tungsten lamp or a hydride lamp is used as the standard light source, which is compared with the flame photometer lamp to be calibrated to obtain the corresponding calibration coefficient.

The solution concentration measurement value offset correction refers to determining the measurement error of the instrument by comparing the error between the measured value of a standard sample with a known concentration and the actual value and performing correction. This calibration requires the use of standard samples with known concentrations, and multiple measurements under specific measurement conditions to obtain an average value and compare it with the actual concentration to determine the corresponding calibration coefficient.

The metrological calibration of digital flame photometer is very important. Only through correct metrological calibration operations and frequent maintenance can the flame photometer work normally and accurately.