>[!faq]- How to reset device? >See the [[Factory settings]] page >[!faq]- Can't select main menu >Use a long press on the round device button, keep the button pressed for 1 second after unlocking to enter the main menu >Read more here: [[Buttons#Buttons]] >[!faq]- Can't change quantity units >Use the settings menu ![[setting_sym.png]] -> [[Measurement units]] change Dose or Count Rate > You can choose measurements in Sieverts (Sv) and Sieverts per hour (Sv/h); Roentgen and Roentgen per hour (R/h); CPS - Count Per Second; CPM - Count Per Minute >[!faq]- 103 Vs 103G The main differences between models 103 and 103g are: >1. Better resolution of the spectrum (7.4% ±0.3% FWHM for 103g vs 8.4% ±0.3% for 103). This helps in better identification of isotopes and allows for slightly faster accumulation of spectra with sufficient statistics. >2. Due to the high density of the GAGG crystal, the device is more sensitive to high energies, on average by 1.5 times. >3. The crystal has better luminosity characteristics, so we plan to raise the upper limit of measurements in the next updates. > differences ![[EN/Device Manual/Images/RC101vs103.jpg]] >[!faq]- Radon >Radon is an inert radioactive gas, a decay product of uranium, thorium, and radium. Uranium and thorium are present in soil in small amounts. The peculiarity of this gas is that it easily passes through soil, concrete, plastic, and rubber. This heavy gas accumulates in basements and lower floors of buildings. In all underground structures without ventilation, the concentration of this gas is increased. Radon does not exist alone, as its decay process produces six more radioactive elements. These radioactive elements are always present alongside radon. The decay of radon is a chain of transformations of one unstable element into another, emitting alpha, beta, gamma, and X-ray radiation. Radiacode detects elevated levels of radon and its decay products. On the spectrum, a pattern similar to that of Radium-226 appears. This serves as an indicator of elevated radon levels. >[!faq]- Troubleshooting >Visit the page [[Troubleshooting]]