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On the sensor

initialization

Reading device

sends a start signal

Release the bus waiting for the sensor

response signal

Continuous reading

device to read 40 data

Data validation

Fixed acquisition time to?

Update temperature

and humidity values

No response signal

There are a

response signal

Parity error

Correct parity

Wait (fixed

acquisition cycle)

Yes

No

Figure 24: Single-bus read flowchart

9. Application Information

1.Work and storage conditions

The proposed scope of work may result in up to 3% RH temporary drift of the signal. Return

to normal working conditions, the sensor calibration status will slowly recover. To speed up the

recovery process can be found in "recovery process." The use of the product will accelerate the aging

process for a long time under abnormal operating conditions.

Avoid placing components on a long-term condensation and dry conditions and the following

environment.

A, salt spray

B, the acid or oxidizing gases such as sulfur dioxide, hydrochloric acid

Recommended Storage Environment

Temperature: 10 ~ 40 ℃ Humidity: 60% RH or less

2.Effects of exposure to chemical substances

Capacitive humidity sensor sensing layer will be disturbed chemical vapors, chemical diffusion

layer in the sensor may cause drift and measurement sensitivity. In a clean environment, slowly

release contaminants out. The recovery process described below to accelerate the process. High

concentrations of chemical pollution can cause damage to the sensor sensing layer completely.

3.Temperature Effect

Relative humidity of the gas, is largely dependent on temperature. Therefore, when measuring

the humidity should be possible to ensure that the humidity sensor works at the same temperature. If

you share a printed circuit board with electronic components heat released in the sensor should be

installed as far as possible away from the electronic components, and installed at the bottom of the

Aosong Guangzhou Electronics Co., Ltd.

Order Phone: 4006 305378

Enterprise QQ: 4006305378

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