A method for matching one or more channels to a reference channel in a multiple-channel detector having a digital output, the method comprising: receiving an analog-to-digital unit input value from the multiple-channel detector for each channel; and replacing the ADU input value by an output value corresponding to each channel from a look up table, wherein the output value in the LUT is associated with the ADU input value in the LUT; wherein the LUT is created by: taking a relative intensity ratio of signals from each channel compared to the reference channel over a range of voltage values; for each ADU input value D across the entire ADU range of the detector, wherein D runs from 0 to D Range, calculating a corresponding signal value mV on the detector that generates each ADU value D by the formula: mV = V ADU × D D Range / Gain, where mV is the signal value on the detector, V ADU is the full signal range of an analog-to-digital conversion of the detector, D Range is the maximum ADU input value of the detector, and Gain is an amplification of a detected signal before the analog-to-digital conversion across the entire ADU range of the detector; interpolating the relative intensity ratios to obtain ratios corresponding to the calculated signal values mV on the detector for each channel; and dividing each of the ADU input values D, wherein D runs from 0 to D Range, by the corresponding interpolated ratio to obtain the corresponding associated output value for each channel. receiving an analog-to-digital unit input value from the multiple-channel detector for each channel; and replacing the ADU input value by an output value corresponding to each channel from a look up table, wherein the output value in the LUT is associated with the ADU input value in the LUT; wherein the LUT is created by: taking a relative intensity ratio of signals from each channel compared to the reference channel over a range of voltage values; for each ADU input value D across the entire ADU range of the detector, wherein D runs from 0 to D Range, calculating a corresponding signal value mV on the detector that taking a relative intensity ratio of signals from each channel compared to the reference channel over a range of voltage values; for each ADU input value D across the entire ADU range of the detector, wherein D runs from 0 to D Range, calculating a corresponding signal value mV on the detector that generates each ADU value D by the formula: mV = V ADU × D D Range / Gain, where mV is the signal value on the detector, V ADU is the full signal range of an analog-to-digital conversion of the detector, D Range is the maximum ADU input value of the detector, and Gain is an amplification of a detected signal before the analog-to-digital conversion across the entire ADU range of the detector; interpolating the relative intensity ratios to obtain ratios corresponding to the calculated signal values mV on the detector for each channel; and dividing each of the ADU input values D, wherein D runs from 0 to D Range, by the corresponding interpolated ratio to obtain the corresponding associated output value for each channel. interpolating the relative intensity ratios to obtain ratios corresponding to the calculated signal values mV on the detector for each channel; and dividing each of the ADU input values D, wherein D runs from 0 to D Range, by the corresponding interpolated ratio to obtain the corresponding associated output value for each channel.