1 TECHNICAL DATA RELATIVE HUMIDITY/ TEMPERATURE MODULE HTM2500 Based on the rugged HTS2010 humidity / temperature sensor , HTM2500 is a dedicated humidity and temperature 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 humidity 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 ● Humidity calibrated within +/- 2% RH @ 55% RH ● Temperature measurement through NTC 10kohm +/- 3% direct output ● Ratiometric to voltage supply ● Suitable for 3 to 10 Volts supply voltage HUMIDITY ● ● ● ● SENSOR SPECIFIC FEATURES Instantaneous de-saturation after long periods in saturation phase. Patented solid polymer structure. High resistance to chemicals. Fast response time. MAXIMUM RATINGS OPERATING RANGE 100 Vs 12 Vdc Humidity Operating Range RH 0 to 100 % RH Temperature Operating Range Ta -30 to 70 °C Peak conditions: less than 10% of the operational time. RELATIVE HUMIDITY IN % Supply Voltage (peak) 90 80 70 60 STEADY STATE 50 40 n °C tio -40 to 85 era Tstg Op Storage Temperature nt Unit itte Value erm Symbol Int Ratings 30 20 10 0 -40 CHARACTERISTICS -20 0 20 40 60 AMBIENT TEMPERATURE IN ¡C (Ta = 23°C, Vs = 5Vdc, RL > 1MV otherwise stated) Characteristics Symbol Min Humidity measuring range RH 1 Relative Humidity accuracy (10 to 95% RH) RH Voltage supply Vs Nominal output @ RH = 55% Vout Typ Max Unit 99 % RH +/-3 +/- 5 % RH 4.75 5.00 5.25 V 2.42 2.48 2.54 V 0.8 mA Current consumption Ic 0.4 Temperature coefficient (10 to 50 °C ) Tcc + 0.1 % RH/°C DmV/% RH +25 mV/% RH Averaged Sensitivity from 33% to 75% RH Sink current capability (RL 5 15 kV) Is Recovery time after 150 hours of condensation t 300 mA 10 s Humidity Hysteresis +/-1.5 % RH Long term stability 0.5 %RH/yr Response time (33 to 76% RH, static, @ 63%) t 5 s Output impedance Z 70 V 80 TECHNICAL 2 DATA MEASUREMENT CONDITIONS HTM 2500 Typical Measuring Ranges in Humidity ● HTM2500 is specified for accurate measurements within 10 to 95% RH. 4000 Output Voltage (mV) 3500 ● Excursion out of this range (< 10% or > 95% RH, including condensation) does not affect the reliability of HTM2500 characteristics. 3000 METROLOGY HTM 2500 RANGE 2500 2000 1500 1000 0 10 20 30 40 50 60 70 80 90 100 Relative Humidity in % HTM2500 MODELLED LINEAR VOLTAGE OUTPUT (VS = 5V) REFERENCE OUTPUT VALUES 4000 RH (%) Vout(mV) RH (%) Vout(mV) 1235 10 2480 55 1390 15 2605 60 1540 20 2730 65 1685 25 2860 70 1825 30 2990 75 1960 35 3125 80 2090 40 3260 85 2220 45 3405 90 2350 50 3555 95 Output Voltage (mV) 3500 3000 2500 2000 Vout = 26.65 RH + 1006 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 = 1.05E-3RH3 -1.76E-1RH2 + 35.2RH + 898.6 ERROR BUDGET AT 23°C 6 HTM2500 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 -3 3 -5 2 RH% = -1.9206E-9V out + 1.437E Vout + 3.421E Vout - 12.4 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 HPC032 Rev. B Jul 2002 80 90 100 All equations Vout in mV, RH in %, Ta in °C. LINEARITY ERROR OF HTM2500 3 DATA TECHNICAL Humidity Measurement using HTM2500 Typical HTM 2500 relative Humidity measurement 100 90 80 Relative Humidity (%RH) 70 60 50 40 %RH 5 0.0375 0.03 V Vout 2 37.7 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) Temperature Measurement using HTM2500 (NTC output values) Temp in °C Suggested application R in ohms Temp in °C R in ohms -30 169149 +20 12474 -25 125546 +25 10000 -20 94143 +30 8080 -15 71172 +35 6569 -10 54308 +40 5372 -5 41505 +45 4424 0 32014 +50 3661 +5 25011 +55 3039 +10 15437 +15 19691 +60 2536 15618 +65 2128 2 12379 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 a look up table . Convert RH% to BCD code Send data to display HPC032 Rev. B Jul 2002 4 TECHNICAL DATA ● RESISTANCE TO PHYSICAL AND CHEMICAL STRESSES. ● HTM2500 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, SO 2 (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. ● HTM1500 is not light sensitive. ● SPECIFIC PRECAUTIONS ● HTM2500 is not protected against reversed polarity - Check carefully when connecting the device. ● If you wish to use HTM1500 in a chemical atmosphere not listed above, consult us. Dim PACKAGE OUTLINE HTM2500 Min (mm) Max (mm) A 53 55 B 74.3 76.3 C 11.2 11.6 D* 200 250 * specific lenght available on request Wire Color Function W1 Brown BrownroundGround W2 White Supply Voltage W3 Yellow Humidity Voltage W4 Green Green NTC Resistance NTC Resistance W5 Black Shield ORDERING INFORMATION (MULTIPLE PACKAGE QUANTITY OF 10 PIECES). HTM 2500 HUMIDITY ANALOG VOLTAGE OUTPUT MODULE. www.humirel.com 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 customerís 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. HPC032 Rev. B Jul 2002 email: [email protected]