Feature

●DC power supply 10-30V Maximum power consumption 0.4w
●Output signal RS485/4-20mA/0-5V/0-10V
●Measuring range 30dB-120dB Resolution 0.1dB
●Frequency 20Hz- 12.5kHz Measurement error ± 0.5dB
●Power consumption≤0.15W at 12V DC,25C) Working pressure range 0.9-1.1atm

[4-20mA]





Description

Using high-sensitivity condenser microphone, the signal is stable, and the accuracy is high. It has the characteristics of wide measuring range, good linearity, easy to use, easy to install, and long transmission distance.

The noise sensor is widely used in industrial field noise testing occasions, and can be widely used in warehouses, computer rooms, production workshops, archives, libraries, schools, shopping malls, smart homes, building control, airports, railway stations and other fields.

Parameter

DC power supply (default) 10~30V DC
Power 0.4W
TX circuit operating temp -20℃~+60℃，0%RH~80%RH
Communication Interface 485 communication (modbus) protocol; baud rate: 2400, 4800 (default), 9600; data bit length: 8 bits; parity check method: none; stop bit length: 1 bit; default ModBus communication address: 1; support function Code: 03
Parameter settings Use the provided configuration software to configure through the 485 interface
Resolution 0.1dB
Measuring range 30dB~120dB
Frequency Range 20Hz~12.5kHz
Response time ≤3s
Stability Less than 2% in the life cycle
Noise accuracy ±0.5dB (at reference pitch, 94dB at 1kHz)

Size

Sound Pressure Level MeterSound Pressure Level Meter

Sensor wiring

Brown: Positive power supply (10~ 30V DC)

Black: power negative

Yellow: 485-A

Blue: 485-B

Single connection system frame diagram

Classroom Noise Monitor Classroom Noise Monitor

Connection description

Multiple sensors can be combined on a single 485 bus. In theory, one bus can be used for 254 485 sensors, and the other end is connected to a PLC with a 485 interface, and a single-chip microcomputer is connected through a 485 interface chip, or it can be connected to a computer by using USB to 485. Use the sensor configuration tool to configure and test (only one device can be connected when using the configuration software).

Multi-connection system frame diagram

Decibel Meter TransmitterDecibel Meter Transmitter

Interface Description

Wide-voltage power input can be 10~30V. When wiring the 485 signal wire, pay attention to the two wires A\B not to be reversed, and the addresses of multiple devices on the bus cannot be conflicted.

Basic communication parameters

Encoding: 8-bit binary

Data bits: 8 bits

Parity bit: none

Stop bit: 1 bit

Error check: CRC (redundant cyclic code)

Baud rate: 2400bit/s, 4800bit/s, 9600 bit/s can be set, the factory default is 4800bit/s