Intermittent Operation TECHNICAL 1DATA 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 lSmall size lNot affected by water immersion lFull interchangeability l High reliability and long term stability l Typical 1 to 4 Volt DC output for 0 to 100% RH at 5 V DC supply l Humidity calibrated within +/- 2% RH @ 55% RH l Temperature measurement through NTC 10kohm +/- 3% direct output lRatiometric to voltage supply lSuitable for 3 to 10 Volts supply voltage HUMIDITY SENSOR SPECIFIC FEATURES lInstantaneous de-saturation after long periods in saturation phase. lPatented solid polymer structure. lHigh resistance to chemicals. lFast response time. MAXIMUM RATINGS OPERATING RANGE 100 Ratings Symbol Value Unit 90 80 Storage Temperature Tstg -40 to 85 °C 70 Supply Voltage (peak) Vs 12 Vdc 60 50 STEADY Humidity Operating Range RH 0 to 100 % RH STATE 40 Temperature Operating Range Ta -30 to 70 °C 30 20 10 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, R > 1MV otherwise stated) L Characteristics Symbol Min Typ Max Unit Humidity measuring range RH 1 99 % RH Relative Humidity accuracy (10 to 95% RH) RH +/-3 +/- 5 % RH Voltage supply V 4.75 5.00 5.25 V s Nominal output @ RH = 55% V 2.42 2.48 2.54 V out Current consumption I 0.4 0.8 mA c Temperature coefficient (10 to 50 °C ) T + 0.1 % RH/°C cc Averaged Sensitivity from 33% to 75% RH DmV/% RH +25 mV/% RH Sink current capability (R 5 15 kV)I 300 mA L s Recovery time after 150 hours of condensation t 10 s Humidity Hysteresis +/-1.5 % RH Long term stability 0.5 %RH/yr Response time (33 to 76% RH, static, @ 63%) t 5s Output impedance Z 70 V RELATIVE HUMIDITY IN % TECHNICAL DATA 2 HTM 2500 Typical Measuring Ranges in Humidity MEASUREMENT CONDITIONS 4000 � HTM2500 is specified for accurate measurements within 10 to 95% RH. 3500 � Excursion out of this range (< 10% or > 95% RH, 3000 METROLOGY including condensation) does not affect the reliability HTM 2500 RANGE 2500 of HTM2500 characteristics. 2000 1500 1000 010 2030 4050 6070 80 90 100 Relative Humidity in % HTM2500 MODELLED LINEAR VOLTAGE OUTPUT (VS = 5V) REFERENCE OUTPUT VALUES 4000 RH (%) V (mV) RH (%) V (mV) 3500 out out 10 1235 55 2480 3000 15 1390 60 2605 20 1540 65 2730 2500 25 1685 2860 70 2000 30 1825 75 2990 Vout = 26.65 RH + 1006 35 1960 80 3125 from 10 to 95 % RH 1500 40 2090 85 3260 with Vout in mV and RH in % 45 2220 3405 90 1000 010 2030 4050 6070 80 90 100 50 2350 95 3555 Relative Humidity in % RH Reversed Polynomial Equation -3 3 -1 2 Vout = 1.05E RH -1.76E RH + 35.2RH + 898.6 ERROR BUDGET AT 23°C 6 HTM2500 ERROR LIMITS 5 4 3 2 1 0 Temperature coefficient compensation -1 -3 -2 RH % = RH% * (1 -(Ta -23)* 2.4E ) Cor Read -3 -4 -5 -6 010 2030 4050 6070 80 90 100 Relative Humidity in % RH 2 1.5 Non linearity and temperature compensation 1 -9 3 -5 2 -3 RH% = -1.9206E V + 1.437E V + 3.421E V - 12.4 out out out 0.5 -3 0 1 + (Ta-23) * 2.4E -0.5 -1 -1.5 -2 All equations V in mV, RH in %, Ta in °C. out 010 2030 4050 6070 80 90 100 Relative Humidity in % RH LINEARITY ERROR OF HTM2500 HPC032 Rev. B Jul 2002 Output Voltage (mV) Delta in % RH Delta in % RH Output Voltage (mV) TECHNICAL DATA 3 Humidity Measurement using HTM2500 Typical HTM 2500 relative Humidity measurement 100 100 90 90 80 80 70 70 60 60 50 50 40 40 %RH %RH 5 5 0.03 0.03 V 75 V 2 2 37.7 out out 30 30 from 10 to 95% RH from 10 to 95% RH 20 20 with V with V in mV and RH in % in mV and RH in % out out 10 10 0 0 1000 1000 1500 1500 2000 2000 2500 2500 3000 3000 3500 3500 4000 4000 Output Voltage (mV) Output Voltage (mV) Temperature Measurement using HTM2500 (NTC output values) Temp in °C R in ohms Temp in °C R in ohms -30 169149 +20 12474 -25 125546 +25 10000 2 12379 -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 19691 +60 2536 15437 +15 15618 +65 2128 Steps of 1% RH are achievable Suggested application 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 Relative Humidity (%RH) Relative Humidity (%RH) TECHNICAL DATA 4 lRESISTANCE TO PHYSICAL AND CHEMICAL STRESSES. l HTM2500 has passed through qualification processes of HUMIREL including vibration, shock, storage, high temperature and humidity, ESD. lAdditional tests under harsh chemical conditions demonstrate good operation in presence of salt atmosphere, SO 2 (O.5%), H S (0.5%), O , NO , NO, CO, CO , Softener, Soap, Toluene, acids (H SO , HNO , HCl), HMDS, Insecticide, 2 3 x 2 2 4 3 Cigarette smoke, a non exhaustive list. l HTM1500 is not light sensitive. lSPECIFIC PRECAUTIONS l HTM2500 is not protected against reversed polarity - Check carefully when connecting the device. l If you wish to use HTM1500 in a chemical atmosphere not listed above, consult us. Dim Min (mm) Max (mm) PACKAGE A 53 55 OUTLINE B 74.3 76.3 HTM2500 C 11.2 11.6 D* 200 250 * specific lenght available on request Wire Color Function W1 Brown Ground W1 Brownround W2 White Supply Voltage W3 W3 Y Yellow ellow Hu Humi midi dity ty Vol Volta tage ge W4 Green NTC Resistance Green 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 regard- ing 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 with- out 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 cus- tomerís 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: sales@humirel.com