The Test Set TS710 is used for the periodic inspection of the 700 Air and 900 Air series spectroscopic gamma detectors in situ. It consists of a ring-shaped test source that is mounted on the SARA detector using a spacer ring. This design ensures an accurate reproduction of the exact position of the test set with regard to the detectors. Using the analysis program installed in SARA, the correct functioning and accuracy of the spectrum detection as well as the accuracy of the gamma dose rate readings can be tested and recorded automatically during a periodic inspection, without dismantling the detectors. The results of the inspection can be communicated via LAN or via remote data communication for the final archiving.