visibility in weather

1.Product introduction of visibility in weather

Visibility in weather is a measure of how far away an object or light can be clearly identified. Visibility is affected by fog and sinking air.The N30 visibility in weather uses the forward scattering method to measure the total extinction coefficient of the air and then calculates the current visibility.It is widely used in road transportation, meteorology and other industries.

2.Technical features of visibility in weather

1.The instrument shell is made of high-quality aluminum material, which is spray-painted after anodizing.The whole machine has excellent waterproof, dustproof and anti-collision properties;

2.The transmitting and receiving lenses of the instrument are designed downward, which greatly reduces interference from stray light such as sunlight;

3.Weather phenomenon recognition, which can identify fog, rain, snow, mixed precipitation, sunny and other weather phenomena, with a high recognition rate;

4.Built-in watchdog circuit to ensure reliable and stable outdoor operation for a long time;

5.The instrument communication and power interfaces all include lightning protection designs, which greatly reduce lightning strikes and static electricity damage;

6.12~24V wide voltage power supply, total power is about 1W, very low power consumption, and can be powered by solar panels, batteries, etc.for a long time;

7.The digital interface uses RS485 or RS232, standard MODBUS protocol, and no protocol adaptation is required;

8.The instrument can output 15s, 1min, and 10min visibility values, which can be read directly without configuration, making it more flexible to use.

3.Visibility in weather implementation standards

QX/T 536-2020 Forward scattering visibility meter test method

4.Visibility in weather technical indicators

Main parameters	Parameter range	resolution	error
Measuring range	30km	1m	≤2km ±2%2km~10km ±5%>10km ±10%
Repeatability	≤4%
weather phenomenon	Fog, rain, snow, mixed precipitation, sunny
Weather phenomenon recognition rate	≥95%
working temperature	-40~60℃
Working humidity	0~100%RH
Working power supply	12~24V
Power consumption	1W
size	610x230x360mm (length x width x height)
weight	≤10kg

5.visibility in weather installation instructions

1.Installation location

The installation location of the visibility meter needs to be on an open, flat, unobstructed ground, away from buildings, trees, shrubs, peaks and other objects.This ensures that the instrument's observation range is not blocked and the data is more accurate.

Unnecessary optical interference should be avoided.The receiver of the visibility meter should be installed facing away from a strong light source (such as sunlight), and the transmitter and receiver should be located in the north-south direction.

2.Installation height

The installation height of the visibility meter should be greater than 1.5m and less than 3m.If the installation height exceeds 3m, the corresponding height should be calibrated.

3.Installation steps

3.1 Before installation, the user should prepare the upright column and install it on the upright column using the clamp provided with the instrument.

3.2 Lift the instrument to a suitable position and use the bolts behind the clamp to install and fix the visibility meter.During installation, ensure that the openings of the receiver and transmitter are facing downwards, otherwise they should be reinstalled.

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