ZMOD4510 Datasheet

© 2021 Renesas Electronics Corporation

11

June 30, 2021

5.5 Environmental Temperature and Humidity

The sensor module is tested, qualified, and functional in the operation range of -40°C to +65°C. Figure 2 shows the module’s sensitivity for

an additional temperature and humidity measurement is recommended and the algorithm has an auto-compensation included. If no temperature

and humidity data are provided as input, the algorithm will use default values, which may lead to an offset of ±1 EPA level according to Table

6.

5.6 Accuracy and Conditioning

All Renesas gas sensor modules come with electrical and chemical factory calibration with data stored in the module’s nonvolatile memory

(NVM). Using the software provided by Renesas and the calibration coefficients in the NVM will result in stable measurements of the AQI levels

up time of 30 min. In all operation modes a conditioning period of 48 hours followed by a sensor module restart in an ambient environment is

recommended to improve stability and obtain maximum performance.

Typical achievable sensor module performance is displayed in Table 7. Users who require an absolute measurement with the maximum

achievable accuracy are advised to re-calibrate the sensor module with a known air compound. For some environments, an interference

response to siloxanes is of concern; however, the Renesas ZMOD4510 has been proven to be resistant against siloxanes. A maximum potential

life-time exposure has been simulated in all ZMOD4510 operation modes by applying the chemicals D4 (Octamethylcyclotetrasiloxane) and D5

(Decamethylcyclopentasiloxane) in high concentration for several hundred hours.

Table 7.

Typical ZMOD4510 Sensor Module Accuracy Achievable

Parameter

Conditions

Minimum

Typical

Maximum

Unit

Accuracy

Without additional calibration

±50

AQI

Consistency

Part-to-Part Variation

±50

AQI

Durability to Siloxanes

Change in sensitivity during 15,000 ppm·h

exposure with D4 and D5

±8

%