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L4949 PDF Download |
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File Size : 116 KB
Manufacturer:STM Description:For software corrected accuracy, assume correction using calibration coefficients with calibration equations for error compensation. Software correction for humidity and temperature is handled automatically using the 1-Wire Viewer Software package available at: http://www.ibutton.com. WARNING: Not for use as the sole method of measuring or tracking temperature and/or humidity in products and articles that could affect the health or safety of persons, plants, animals, or other living organisms, including but not limited to foods, beverages, pharmaceuticals, medications, blood and blood products, organs, flammable, and combustible products. User shall assure that redundant (or other primary) methods of testing and determining the handling methods, quality, and fitness of the articles and products should be implemented. Temperature and/or humidity tracking with this product, where the health or safety of the aforementioned persons or things could be adversely affected, is only recommended when supplemental or redundant information sources are used. Data logger products are 100% tested and calibrated at time of manufacture by Dallas Semiconductor/Maxim to ensure that they meet all data sheet parameters, including temperature accuracy. User shall be responsible for proper use and storage of this product. As with any sensor-based product, user shall also be responsible for occasionally rechecking the temperature accuracy of the product to ensure it is still operating properly. Response time is determined by measuring the 1/e point as the device transitions from 40 to 90%RH or 90 to 40%RH, whichever is slower. Test was performed at 5L/min airflow. All L4949 humidity measurements are 12-bit readings. Missioning determines 8-bit or 16-bit data logging. Battery lifetime is the same no matter what RH resolution is logged. Reliability studies have shown that the device survives a minimum of 1000 cycles of condensation and drying, but this product is not guaranteed for extended use in condensing environments. Software corrected accuracy is accomplished using the method detailed in the Software Correction Algorithm for Temperature section of this data sheet. Every L4949 Device is measured and calibrated in a controlled, NIST-traceable RH environment. Higher accuracy versions may be available. Contact the factory for details. If this device is exposed to a high humidity environment (>70%RH), and then exposed to a lower RH environment, the device will read high for a period of time. The device will typically read within +0.5%RH at 20%RH, 30 minutes after being exposed to continuous 80%RH for 30 minutes. All capacitive RH sensors can change their reading depending upon how long they have spent at high (>70%RH) or low RH (<20%RH). This effect is called saturation drift and can be compensated through software, as described in the Software Saturation Drift Compensation section of this data sheet. Individual RH readings always include a noise component (repeatability). To minimize measurement error, average as many samples as is reasonable. Like all relative humidity sensors, when exposed to contaminants and/or conditions toward the limits of the safe operating range, accuracy degradation can result (see Safe Operating Range chart). For maximum long-term stability, the sensor should not be exposed or subjected to organic solvents, corrosive agents (strong acids, SO2, H2SO4, CI2 ,HCL, H2S, etc.) and strong bases (compounds with PH greater than 7). Dust settling on the filter surface does not affect the sensor performance except to possibly decrease the speed of response. For more information on the RH sensors tolerance to chemicals visit: http://content.honeywell.com/sensing/prodinfo/humiditymoisture/technical/c15_144.pdf All humidity specifications are determined at +25C except where specifically indicated. |
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| 1PCS | 100PCS | 1K | 10K | ||
| 价 格 | |||||
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型 号：L4949 厂 家：STM 封 装：08+ 批 号：SOP 数 量：100 说 明：全新原装，长期稳定供应 |
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运 费： 所在地： 新旧程度： |
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| 联系人：林小姐 |
| 电 话：086-755-23815997 |
| 手 机：13632589437 |
| QQ：1097182423,2851921558 |
| MSN： |
| 传 真：0755-23815984 |
| EMail：joylin@hongbotong.com |
| 公司地址： 深圳市福田区深南中路3006号佳和大厦B座2007室 |
