Review on ποΈ Enhanced Precision with the Instruments R8090 Calibrator Diameter Microphones by Ryan Sandell
Check battery voltage before use
03/15/2019. The new device comes with a dead battery and the switch is on. Replace it with a new Duracell 9VDC battery and it will produce the correct frequency and dB. Before calibrating sound level devices, it is recommended to check the battery voltage to ensure proper operation and calibration.
- Great price
- Big and bulky
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