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Wohler SP 22 Sound Level Meter
The Wohler SP 22 digital sound level meter provides automatic or manual ranging in six measurement ranges in 10 dB steps from 30 to 130 dB. The unit features 0.1 dB resolution. A background noise absorber permits you to measure sound levels accurately even in the presence of high background noise. The meter allows you to select between fast and slow response times and A and C weighting. A maximum hold function is provided.Jacks on the meter provide both AC and DC analog output, while a digital RS-232 interface allows you to use an optional cable to capture sound level data on a PC. Sound levels are displayed both digitally and in a bar graph. The digital display is updated every 500ms, while the bar graph is updated every 50 ms. When you turn the meter on, it will be in automatic range mode and a small AUTO will be displayed on the left side of the screen. In this mode, the meter will adjust the measurement range automatically for accuracy. The two digit number to the left of the bar graph on the LCD will show the low end of the current range. WÖhler SP 22 Sound Level Meter Specifications Measured Values Measurement Frequency Range 31.5 Hz ... 8 KHZ. Accuracy + 1.5 dB (under reference conditions). Measurement Level A Weighting 30 dB ... 130 dB. Measurement Level C Weighting 35 dB ... 130 dB. Measurement Level Range 6 ranges in 10 dB steps: 30 ... 80 dB 40 ... 90 dB 50 ... 100 dB 60 ... 110 dB 70 ... 120 dB 80 ... 130 dB. Automatic Range 30 ... 130 dB. Digital Display 3 1/2 digit LCD resolution: 0.1 dB update: every 0.5 seconds. Quasi-Analog Bar Indicator 1 dB display steps, 50 dB display range, updated every 50ms. Range 50 dB. Time Weighting FAST(F): 125 ms SLOW(S): 1 s. General Microphone 6 mm diameter Electret condenser microphone Analog Output AC: 0.707 Vrms (at full scale) DC: 10 mvDC/dB. Operating Temperature 4 ... 50 °C, 10 ... 90 % Relative Humidity. Storage Temperature -20 ... 60 °C. Battery 9V. Battery Life Approximately 20 hours. Dimensions 80 mm x 256 mm x 38 mm (3" x 11" x 1.5"). Weight 240 g (10.3 oz). Wohler SP 22 Warranty 12 months.

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