Complaint
Measurement range | Range | 30~130dB |
Signal output mode | RS485 | |
Accuracy | 23±5ºC The frequency weighting accords with the IEC 61672 type 2 standard and calibrated under the condition of input signal 94dB (31.5Hz-8kHz). | |
Frequency range | 31.5Hz ~ 8kHz | |
Time response | Quick response: T = 200ms Time response simulate human ear's time response | |
Calibrator | B&K (Bruel & Kjaer company), multi-function sound calibrator model: 4226. | |
Microphone | Capacitor microphone | |
Size of Microphone | 0.5 inch | |
Range | 30~130dB | |
Maximum output resistence | 200 Ω | |
The power supply mode | DC 12V | |
Power consumption | DC 12V: ≈ 20mW | |
Installation method | The transfer plate is placed in a round black pipe with a length of 180mm, an outer diameter of 25mm, and an inner diameter of 18mm, seal treatment on both sides | |
External packaging | ABS plastics | |
Working temperature | 0-50ºC(32-122°F) | |
Working humidity | < 80% relative humidity | |
Color of line | Output signal | ||
Voltage type | Current type | Communication | |
Red | Positive + | Positive + | Positive + |
Black (green) | Negative - | Negative - | Negative - |
Yellow | Noise signal | Noise signal | A+/TX |
Blue | B-/RX | ||
