噪音计/声级计校准器 NC-72的详细信息
麦克风种类1, 1/2 or 1/4 inch校准信号114 dB ± 0.2 dB (at 1 atmospheric pressure) Tolerance: ±0.15 dB±0.15dB频率范围250 Hz ± 1 %, Distorsion: < 3 %±20Hz电源IECLR06×2尺寸及重量Approx. 44 (L) X 62 (W) X 170 (D) mm Approx. 740 g 附件盒子一个；电池二节；1/2inch适配器NC-74-0021个英文介绍：1. Sound pressure level 114 dB at 250 Hz2. Standard sound source for laboratory studies3. High accuracy and stability4. Class 0L IEC 60942: 1988Specification Applicable standardsIEC942-1988 class0LApplicable microphone1, 1/2 or 1/4 inchNominal output sound pressure level114 dB ± 0.2 dB (at 1 atmospheric pressure) Tolerance: ±0.15 dBFrequency250 Hz ± 1 %, Distorsion: < 3 %Power requirementIEC R6 battery X 6 Battery life: LR6 (alkaline) approx. 13 hDimensions and weightApprox. 44 (L) X 62 (W) X 170 (D) mm Approx. 740 g (incl. batteries)
麦克风种类1, 1/2 or 1/4 inch校准信号114 dB ± 0.2 dB (at 1 atmospheric pressure) Tolerance: ±0.15 dB±0.15dB频率范围250 Hz ± 1 %, Distorsion: < 3 %±20Hz电源IECLR06×2尺寸及重量Approx. 44 (L) X 62 (W) X 170 (D) mm Approx. 740 g 附件盒子一个；电池二节；1/2inch适配器NC-74-0021个英文介绍：1. Sound pressure level 114 dB at 250 Hz2. Standard sound source for laboratory studies3. High accuracy and stability4. Class 0L IEC 60942: 1988Specification Applicable standardsIEC942-1988 class0LApplicable microphone1, 1/2 or 1/4 inchNominal output sound pressure level114 dB ± 0.2 dB (at 1 atmospheric pressure) Tolerance: ±0.15 dBFrequency250 Hz ± 1 %, Distorsion: < 3 %Power requirementIEC R6 battery X 6 Battery life: LR6 (alkaline) approx. 13 hDimensions and weightApprox. 44 (L) X 62 (W) X 170 (D) mm Approx. 740 g (incl. batteries)
