Z-02 type noise measurement module

One.
Overview The Z-02 Noise Measurement Module is a digital noise measurement module
.

This module adopts sound sensor, and adopts digital filtering and time measurement algorithm, which has the advantages
of high reliability, good stability, wide dynamic range, and no need for range conversion.

It also features a standard 1/2" microphone size stainless steel probe design that is tightly coupled to the acoustic calibrator for easy acoustic calibration
.

In addition, the main control board circuit core device is completely shielded, not only beautiful, but also strong anti-interference ability, but also convenient to embed in other equipment or chassis! The module uses a common RS485 interface and Modbus RTU communication protocol for a variety of application integrations
.

It can be widely used in noise monitors, detectors, automatic control systems, environmental noise monitoring systems, industries, factories and other places that need to be measured
.

Two.
Main specifications and technical parameters a.
Accuracy: ± 1.
5 dB, calibrated
at ambient temperature of 23±5°C and input signal of 94dB (1kHz).

b.
Frequency weighting: A weighting c.
Time weight: F.
Fast response d.
Frequency range: 20 Hz ~ 12.
5 kHz e.
Reference environmental conditions: Meet the technical requirements under the following environmental conditions: 1.
Air temperature: 23 °C; 2.
Relative humidity: 50%; 3.
Static pressure: 101.
325 kPa; 4.
There is no strong mechanical vibration, shock, strong electromagnetic field and corrosive gas around
.

f.
Operating environment conditions 1.
Air temperature: -10°C ~ +50°C 2.
Relative humidity: 20% ~ 90% 3.
Static pressure: 65 kPa ~ 108 kPa g.
1 kHz frequency measurement range: 30 dB(A) ~ 120 dB(A) h.
Resolution: 0.
1 dB i.
Influence of the use of hood: not more than 0.
5 dB j in the important frequency range.
Power supply mode: DC5V, the user needs to
。
The specific supply voltage can be seen on the nameplate of the label, the voltage is misconnected or the positive and negative poles are reversed may cause the module to work abnormally, and it will burn the module
in severe cases.

Therefore, before powering up, be sure to check carefully to make sure that there is no error before you can power
on.

k.
Output mode: RS485(ModBus)l power consumption, not more than 0.
2W three.
Wiring method The wiring method is indicated on the circuit board, or the "product size drawing" below: 1.
GND" public land
.

2.
"B/R" serial port hair, RS485 "B-"
.

3.
"A/T" serial port closes, RS485 "A+"
.

4.
"V+" is connected to the positive pole of
the power supply.

Four.
ModBus communication protocol 1.
Communication parameters 8 bits data bit, 1 bit stop bit, no parity, factory default baud rate 9 600 Bd
.

The CRC is a 2-byte checksum, with the low byte in front and the high byte in the back
.

If you connect to a computer and use serial debugging software to send and receive data, set the software to HEX (hexadecimal) to send and receive
.

2.
Communication protocol The factory default device address of this module is 1, and the address range that can be set is 1~255
.

If you need to connect multiple modules to the same communication network, you must first set a new device address for each module independently (see [1][2]), otherwise it will cause network communication failure
.

This module is compatible with a variety of protocols on the market, so you can send a variety of different instructions to achieve the same function
.

When forgetting the device address and using the broadcast address to send instructions, please ensure that only this module is connected on the 485 network bus, and the other modules are not connected, otherwise the bus data will be disordered
due to multiple devices sending responses at the same time.

Five.
Product size 6.
Common failures and solutions 1.
The device address is incorrect, or there is a device with a duplicate address (factory default is all 1).


2.
Baud rate, check mode, data bit, stop bit error (factory default baud rate is 9600).


3.
When the power is on, check whether the wiring is wrong, especially whether the power supply voltage is correct
.

4.
RS485 communication is not normal, please check whether A/T and B/R are reversed
.

5.
The number of equipment is too large or the wiring is too long, the nearest power supply should be added, RS485 intensifier should be added, and the 120Ω termination resistance
should be added.

6.
The module is damaged (please note the fault situation and return to the factory for repair
).