TECHNICAL 1 DATA HM 1500 RELATIVE HUMIDITY MODULE 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 ● ● ● ● ● ● ● ● ● 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 ● ● ● ● 1 Instantaneous de-saturation after long periods in saturation phase. Patented solid polymer structure. High resistance to chemicals. Fast response time. OPERATING RANGE MAXIMUM RATINGS 100 Tstg -30 to 70 °C Supply Voltage (Peak) Vs 7 Vdc Humidity Operating Range RH 0 to 100 % RH Temperature Operating Range Ta -30 to 60 °C 75 50 E AT ST Storage Temperature INTERMITTENT OPERATION DY Unit EA Value ST Symbol RELATIVE HUMIDITY IN % Ratings 2 25 Peak conditions : less than 10% of the operational time. 0 -40 -20 0 20 40 60 80 AMBIENT TEMPERATURE IN °C CHARACTERISTICS (Ta = 23°C, Vs = 5Vdc, RL Characteristics > 1MΩ otherwise stated) Symbol Min. Humidity measuring range RH 1 Relative Humidity accuracy (10 to 95 % RH) RH Voltage supply Vs Nominal output @ RH = 55 % Vout Current consumption Ic Temperature coefficient (10 to 50 °C ) Tcc Averaged Sensitivity from 33% to 75% RH ∆mV /% RH Sink current capability (RL = 15 kΩ) Is Recovery time after 150 hours of condensation t Typ. Max. Unit. 99 % RH +/- 3 +/- 5 % RH 4.75 5.00 5.25 V 2.42 2.48 2.54 V 0.4 0.8 mA + 0.1 % RH/°C + 25 mV /% RH 300 µA 10 s Humidity Hysteresis +/-1.5 % RH Long term stability 0.5 % RH/yr Response time (33 to 76 % RH, static, @ 63 %) τ 10 s Output impedance Z 70 Ω HPC009 Rev. H October 2001 TECHNICAL 2 DATA MEASUREMENT CONDITIONS HM 1500 Typical Measuring Ranges in Humidity ● HM1500 is specified for accurate measurements within 10 to 95% RH. 4000 HM 1504 Output Voltage (mV) 3500 ● Excursion out of this range (< 10% or > 95% RH, including condensation) does not affect the reliability of HM1500 characteristics. ● Dedicated HM15XX Product are available for extreme RH conditions (as HM1520 for low dewpoints) Consult HUMIREL for further information. 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) REFERENCE OUTPUT VALUES 4000 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 Output Voltage (mV) 3500 3000 2500 2000 Vout = 25.68 RH + 1079 from 10 to 95 % RH 1500 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 HM1500 ERROR LIMITS 5 Delta in % RH 4 3 2 1 0 Temperature coefficient compensation -1 RHCor% = RH% -2 Read * (1 -(Ta -23)* 2.4E-3) -3 -4 -5 -6 0 10 20 30 40 50 60 70 80 90 100 Relative Humidity in % RH 2 Non linearity and temperature compensation Delta in % RH 1.5 1 RH% = -1.919E-9Vout3 + 1.335E-5Vout2 + 9.607E-3Vout - 21.75 0.5 1 + (Ta-23) * 2.4E-3 0 -0.5 -1 -1.5 -2 0 10 20 30 40 50 60 70 Relative Humidity in % RH HPC009 Rev. H October 2001 80 90 100 All equations Vout in mV, RH in %, Ta in °C. LINEARITY ERROR OF HM1500 MODULE TECHNICAL 3 DATA HUMIDITY MEASUREMENT USING HM1500 Typical HM 1500 relative Humidity measurement 100 Relative Humidity (% RH) 80 70 60 50 40 % RH = 0.0391 Vout -42.5 from 10 to 95 % RH 30 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 Gain Vout --> Sensor Oscillator VCC5 VCC5 U1 3 4 16 15 C2 RA/AIN0 RA/AIN1 RA/AIN2 RA/AIN3 RTCC MCLR OSC1 OSC2/CLK RBO RB1 RB2 RB3 RB4 RB5 RB6 RB7 X1 C1 PIC16CXXX With A/D VCC5 7805 GND VCCIN VI VO 3 6 7 8 9 10 11 12 1317 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 Calculate RH% using equation or using alook up table Convert RH% to BCD code 2 1 17 18 1 2 HM150X Suggested applications for HM1500 Send data to display HPC009 Rev. H October 2001 TECHNICAL 4 DATA ● 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 of salt atmosphere, SO2 (O.5%), H2S (0.5%), O3, NOx, NO, CO, CO2, Softener, Soap, Toluene, acids (H2SO4, HNO3, HCl), HMDS, Insecticide, Cigarette smoke, a non exhaustive list. - HM1500 is not light sensitive. ● SPECIFIC PRECAUTIONS - HM1500 is not protected against reversed polarity - Check carefully when connecting the device. - If you wish to use HM1500 in a chemical atmosphere not listed above, consult us. A B D PACKAGE OUTLINE HM1500 C Dim Min (mm) Max (mm) A 9.70 10.20 B 5.00 5.50 C 52 54 D 11.2 11.6 E* 200 250 * specific length available on request E W1 W2 W3 Wire Color Function W1 White GROUND W2 Blue SUPPLY VOLTAGE W3 Yellow OUTPUT VOLTAGE ORDERING INFORMATION (MULTIPLE PACKAGE QUANTITY OF 10 PIECES). HM1500 : HUMIDITY ANALOG VOLTAGE OUTPUT MODULE. SAMPLE KIT OF HM1500 IS AVAILABLE THROUGH HUMIREL WEB SITE www.humirel.com email : [email protected] The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsability is assumed for inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the manufacturer. Humirel reserves the right to make changes without further notice to any product herein. Humirel makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does Humirel assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. « Typical » parameters can and do vary in different applications. All operating parameters, including « Typical » must be validated for each customer applications by customer’s technical experts. Humirel does not convey any license under its patent rights nor the rights of others. Humirel products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other application intended to support or sustain life, or for any application in which the failure of the Humirel product could create a situation where personal injury or death may occur. Should buyer purchase or use Humirel products for any such unintended or unauthorized application, Buyer shall indemnify and hold Humirel and its officers, employees, subsidaries, affiliates and distributors harmless against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of presonal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Humirel was negligent regarding the design or manufacture of the part.Humirel is a registred trade mark of Humirel. HPC009 Rev. H October 2001