Thiết bị hiệu chuẩn độ ồn Tenmars ST-120 (94dB and 114dB)

• IEC 60942:2003 class 1 / ANSI S1.40-1984
• Sound pressure levels: at 94dB and 114dB
• For 1/2 condenser microphone calibration
• Low battery indication
• Harmonic waves distortion ±3%
• Output feedback detection

Specifications

• Output sound level: at 94dB and 114dB
• Frequency :1KHz ± 1% (class 1)-(A)
• Accuracy:94 ±0.3dB 114 ±0.5dB
• Power :9V battery 006P or IEC 6F 22 or NEDA 1604
• Operation environment:23.0°C ±3°C <85%RH,850mbar~1050mbar,≦2000M