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HM1500 Dataheets PDF



Part Number HM1500
Manufacturers Humirel
Logo Humirel
Description RELATIVE HUMIDITY MODULE
Datasheet HM1500 DatasheetHM1500 Datasheet (PDF)

TECHNICAL 1 DATA RELATIVE HUMIDITY MODULE HM 1500 Based on the rugged HS1101 capacitive humidity sensor, HM1500 is a dedicated humidity transducer designed for OEM applications where a reliable and accurate measurement is needed. Direct interface with a micro-controller is made possible with the module’s linear voltage output. MAIN FEATURES G G G G G G G G G Small size Not affected by water immersion Full interchangeability High reliability and long term stability Typical 1 to 4 Volt DC output .

  HM1500   HM1500



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TECHNICAL 1 DATA RELATIVE HUMIDITY MODULE HM 1500 Based on the rugged HS1101 capacitive humidity sensor, HM1500 is a dedicated humidity transducer designed for OEM applications where a reliable and accurate measurement is needed. Direct interface with a micro-controller is made possible with the module’s linear voltage output. MAIN FEATURES G G G G G G G G G Small size Not affected by water immersion Full interchangeability High reliability and long term stability Typical 1 to 4 Volt DC output for 0 to 100 % RH at 5 V DC supply Calibrated within +/- 2 % RH @ 55 % RH Very low temperature dependence Ratiometric to voltage supply within the specified range Suitable for 3 to 7 Volts supply voltage HM 1500 HUMIDITY SENSOR SPECIFIC FEATURES G G G G Instantaneous de-saturation after long periods in saturation phase. Patented solid polymer structure. High resistance to chemicals. Fast response time. OPERATING RANGE 100 1 2 MAXIMUM RATINGS Ratings Symbol Value Unit RELATIVE HUMIDITY IN % INTERMITTENT OPERATION 75 ST EA DY Storage Temperature Supply Voltage (Peak) Humidity Operating Range Tstg Vs RH -30 to 70 7 0 to 100 -30 to 60 °C Vdc % RH °C 50 E AT ST 25 Temperature Operating Range Ta Peak conditions : less than 10% of the operational time. 0 -40 -20 0 20 40 60 80 AMBIENT TEMPERATURE IN °C CHARACTERISTICS Characteristics (Ta = 23°C, Vs = 5Vdc, RL > 1MΩ otherwise stated) Symbol Min. Typ. Max. Unit. Humidity measuring range Relative Humidity accuracy (10 to 95 % RH) Voltage supply Nominal output @ RH = 55 % Current consumption Temperature coefficient (10 to 50 °C ) Averaged Sensitivity from 33% to 75% RH Sink current capability (RL = 15 kΩ) Recovery time after 150 hours of condensation Humidity Hysteresis Long term stability Response time (33 to 76 % RH, static, @ 63 %) Output impedance RH RH Vs Vout Ic Tcc 1 +/- 3 4.75 2.42 5.00 2.48 0.4 + 0.1 + 25 99 +/- 5 5.25 2.54 0.8 % RH % RH V V mA % RH/°C mV /% RH ∆mV /% RH Is t 300 10 +/-1.5 0.5 µA s % RH % RH/yr s τ Z 10 70 Ω HPC009 Rev. H October 2001 TECHNICAL 2 DATA MEASUREMENT CONDITIONS G HM1500 is specified for accurate measurements within 10 to 95% RH. G Excursion out of this range (< 10% or > 95% RH, including condensation) does not affect the reliability of HM1500 characteristics. G Dedicated HM15XX Product are available for extreme RH conditions (as HM1520 for low dewpoints) Consult HUMIREL for further information. Output Voltage (mV) HM 1500 Typical Measuring Ranges in Humidity 4000 HM 1504 3500 3000 METROLOGY HM 1500 RANGE 2500 2000 1500 METROLOGY HM 1520 RANGE 1000 0 10 20 30 40 50 60 70 80 90 100 Relative Humidity in % HM1500 MODELLED LINEAR VOLTAGE OUTPUT (VS = 5V) 4000 REFERENCE OUTPUT VALUES RH (%) Vout(mV) RH (%) Vout(mV) 1325 10 2480 55 1465 15 2605 60 1600 20 2730 65 1735 25 2860 70 1860 30 2990 75 1990 35 3125 80 2110 40 3260 85 2235 45 3405 90 2360 50 3555 95 3500 Output Voltage (mV) 3000 2500 2000 1500 Vout = 25.68 RH + 1079 from 10 to 95 % RH with Vout in mV and RH in % 1000 0 10 20 30 40 50 60 70 80 90 100 Relative Humidity in % RH Reversed Polynomial Equation Vout = 9E-4RH3 -1.3E-1RH2 + 30.815RH + 1030 ERROR BUDGET AT 23°C 6 5 4 HM1500 ERROR LIMITS Delta in % RH 3 2 1 0 -1 -2 -3 -4 -5 -6 0 10 20 30 40 50 60 70 80 90 100 Temperature coefficient compensation RHCor% = RH% Read * (1 -(Ta -23)* 2.4E-3) Relative Humidity in % RH 2 1.5 Non linearity and temperature compensation RH% = -1.919E-9Vout3 + 1.335E-5Vout2 + 9.607E-3Vout - 21.75 Delta in % RH 1 0.5 0 -0.5 -1 -1.5 -2 0 10 20 30 40 50 60 70 80 90 100 1 + (Ta-23) * 2.4E-3 All equations Vout in mV, RH in %, Ta in °C. Relative Humidity in % RH LINEARITY ERROR OF HM1500 MODULE HPC009 Rev. H October 2001 TECHNICAL 3 DATA HUMIDITY MEASUREMENT USING HM1500 Typical HM 1500 relative Humidity measurement 100 80 Relative Humidity (% RH) 70 60 50 40 30 % RH = 0.0391 Vout -42.5 from 10 to 95 % RH 20 with Vout in mV and RH in % 10 0 1000 1500 2000 2500 3000 3500 4000 Output Voltage (mV) Internal block diagram of HM1500 Reference Oscillator L.P. Filter Sensor Oscillator Gain Vout --> Suggested applications for HM1500 Steps of 1% RH are achievable by using 8-bit A/D. If more resolution is required a 10 -bit A/D needs to be used and a third display will be added, giving steps of 0.2% RH Read AINO VCC5 VCC5 U1 3 4 16 15 RTCC MCLR OSC1 OSC2/CLK RA/AIN0 RA/AIN1 RA/AIN2 RA/AIN3 RBO RB1 RB2 RB3 RB4 RB5 RB6 RB7 17 18 1 2 C2 X1 PIC16CXXX With A/D 6 7 8 9 10 11 12 1317 HM150X C1 VCC5 1 3 Calculate RH% using equation or using alook up table VI 7805 GND VO VCCIN Convert RH% to BCD code Send data to display 2 HPC009 Rev. H October 2001 TECHNICAL 4 DATA G RESISTANCE TO PHYSICAL AND CHEMICAL STRESSES - HM1500 has passed through qualification processes of HUMIREL including vibration, shock, storage, high temperature and humidity, ESD. - Additional tests under harsh chemical conditions demonstrate good operation in presence.


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