Noise Dosimeters Noise Dosimeter FAQ What type of NoisePro batteries are approved?
• Eveready E91 Energizer “Max” • Eveready EN91 Energizer “Industrial” • GE/Sanyo “Power Cell” Note: The NoisePro user manual clearly indicates the appropriate batteries including warning statements. To comply in hazardous environments, only those batteries listed above are acceptable. Additionally, the battery life calculations indicated in the manual are based on the alkaline cells listed above. Why does my Q-200 lock up? The Q-200 does not have a lithium backup battery; therefore the instrument’s memory becomes unstable when the battery is removed. After battery replacement it is necessary to reset the unit before operation. What is Exchange Rate or (Doubling Rate)? Exchange rate refers to how the sound energy is averaged over time. Using the decibel scales, every time the sound energy doubles, the measured level increases by 3dB. This is the 3dB exchange rate that most of the world uses. For every increase of 3dB in the time-weighted average the measured DOSE would double. For OSHA
