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E+E Elektronik HCT01, Руководство разработчика

Разработчикам доступен бесплатный доступ к руководству пользователя HCT01 от E + E Elektronik. Здесь вы найдете Developer'S Manual для этого устройства. Скачивайте его с нашего веб-сайта manualshive.com для удобства использования этого продукта.

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Rev. 0.2 / 09 /2015 

 

2 

AN1111-2 

 

 

 

 

 

 

 

 

 

 

 

 

 

Developer’s Guide for  
 
HCT01 

Humidity and 

Temperature 

Sensors 

 

 

Содержание HCT01

Страница 1: ...Rev 0 2 09 2015 2 AN1111 2 Developer s Guide for HCT01 Humidity and Temperature Sensors...

Страница 2: ...2 1 Schematic circuit diagram 6 2 1 1 Bill of Material 6 2 1 2 Correlation between sensor capacity and period 7 3 RH measurement with pre adjusted HCT01 and microcontroller based initially accurate c...

Страница 3: ...gives an overview on the accuracy which can be achieved by various combinations of HCT01 circuitry Using an unadjusted RH sensor HCT01 00 implies humidity calibration for the device built with it The...

Страница 4: ...Rev 0 2 09 2015 5 AN1111 2 Choice of HCT01 version and driving circuitry Figure 1 Circuitry options for HCT01...

Страница 5: ...ive humidity at the sensor The accurate measurement of the period requires a precise time base such as a quartz crystal 2 1 Schematic circuit diagram Figure 2 Circuitry with frequency output 2 1 1 Bil...

Страница 6: ...n 95 pF 25 4 s cycle duration Figure 3 The sensitivity is approx 0 064 s rH with a rise of 0 25 pF rH Figure 4 Nominal characteristic of the measuring device with frequency output Figure 5 Example of...

Страница 7: ...ailable in the E E patent EP 1 574 847 B1 US 7 084 644 B2 3 1 Schematic circuit diagram Figure 6 Schematic circuit design 1 There are three possible measurement paths 1 Sensor capacitance path with R1...

Страница 8: ...parator reaches the voltage at the voltage divider no repeat point 2 and recharge the reference yes end of loop and save the numbers of charge discharge events 6 Each cycle measures the reference path...

Страница 9: ...B influences and hysteresis is shown in Figure 8 Figure 8 Initial accurate electronics w o C_Cal PCB corrected 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 digital capacitance val...

Страница 10: ...l test and layout optimizing loops These imply tests for assessing the impact of the stay capacitance and its variations on the output signal of the device as follows 1 Test a sample of relevant size...

Страница 11: ...0 Fax 43 7235 605 8 E Mail info epluse com Homepage www epluse com Please visit our website to find your local contact 6 Revision history Date Revision number Changes November 2011 V_0 1 Initial relea...

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