Explosion proof noise sensor

This sensor collects environmental noise and processes the weights of different frequency points to calculate the noiseAWeighted value,

Data passes throughRS232The cable is transmitted to the current loop module and outputs current according to the algorithm.
Product model JHM-NS02
Accuracy range +/-3dB (1KHz 94dB point correction)
Conversion accuracy 0.1dB
output mode 4-20mA current loop output
Frequency weighting characteristic A weighted characteristic
Microphone manufacturer Toshiba capacitive (windproof outer cover)
Dynamic measurement range 30dB -130dB (automatic shift)
frequency response 20 Hz --- 20KHz
Dynamic characteristics 0.5 seconds
Working and storage temperature -20 ----- 60℃
Working and storage humidity 10 ---- 90RH%
Power standard DC24V (ripple<0.5%) current 80mA
Manufacturer Beijing Jinghaiming Electronic Technology Research Institute

Intrinsic safety parameters:

1. Security level:Ex ia IIC T6

2 Temperature Working environment temperature:-20--60Celsius

3. Usage areas and standards

This product is used in0,1,2In an environment with explosive gases in the area

B Application Standards

GB3836.1-2010 Explosive Atmosphere1Part: General Requirements for Equipment

GB3836.4-2010 Explosive Atmosphere4Part: Made of intrinsic safety type“i”Protected equipment

Certificate No. 4:CCRI 21.2633X

Instructions for Wiring Method:

Working voltage:DC 24VStabilized power supply, operating current100mA(ripple<0.5%)

V+forDC24VPositive pole of power supply,GNDNegative pole of power supply,O+TheO-for4-20mAelectricity

Output the positive and negative terminals of the stream.O-andGNDTerminal equipotential, internal electrical short circuit connection.

load range50Europe--750Europe, current output range:4mA - 20 mA.

Output algorithm:dB = (Io-4) * 100/16+30.IoIt is the output current of the current loop.

For example:

current15.2mACorresponding noise level:(15.2 - 4）*100/16 + 30 =

100dB。