Automatic Gain Adjustment Using D/A Converters

Circuit Permits Direct Readout of Concentration in Atomic-Absorption Spectrophotometer Measurements

In the Instrumentation Laboratory, Inc., Series 351 Atomic-Absorption Spectrophotometers, the user can preset an arbitrary number, in appropriate physical units, corresponding to the concentration of an element in a reference solution. With the reference (or an equivalent input) applied, the instrument will then automatically calibrate its own gain, after which concentrations of the unknown element in other solutions being tested will be readable directly. Read full article



Rudolf Sachenbacher