technical data rel a tive humidity / temperature module h t m 2 500 1 based on the rugged h t s 20 10 humidity / te mp era tu re senso r , h t m 2 500 is a dedicated humidity an d te mpe ra tu re transducer designed for oem applications where a reliable and ac c ura te measurement is needed. direct interface with a micro-controller is made possible with the module s hu mi di ty linear voltage output. m ain features l small size l not affected by water immersion l full interchangeability l high r eliability and long term stability l typical 1 to 4 volt dc output for 0 to 100% rh at 5 v dc supply l hu mid ity c alibrated within +/- 2% rh @ 55% rh l t e m pe rat ure me as ure me nt th rou gh n tc 10 k oh m +/- 3 % di re ct ou t p ut l ratiometric to voltage supply l suitable for 3 to 10 volts supply voltage h umidity sensor specific features l instantaneous de-saturation after long periods in saturation phase. l patented solid polymer structure. l high resistance to chemicals. l fast response time. m aximum ratings peak conditions: less than 10% of the operational time. c haracteristics (ta = 23?, vs = 5vdc, r l > 1m v otherwise stated) 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 s 4.75 5.00 5.25 v nominal output @ rh = 55% v out 2.42 2.48 2.54 v current consumption i c 0.4 0.8 ma temperature coefficient (10 to 50 ? ) t cc + 0.1 % rh/? averaged sensitivity from 33% to 75% rh d mv/% rh +25 mv/% rh sink current capability (r l 5 15 k v )i s 300 m a 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 ratings symbol value unit storage t emperature t stg - 4 0 to 85 ? supply voltage (peak) vs 12 vdc humidity operating range rh 0 to 100 % rh t emperature operating range t a -30 to 7 0 ? operating range 0 10 20 30 40 50 60 70 80 90 100 -40 -20 0 20 40 60 80 ambient temperature in ? c relative humidity in % steady state intermittent operation
technical data 2 m easurement c onditions l h t m 2 500 is specified for accurate mea- surements within 10 to 95% rh. l excursion out of this range (< 10% or > 95% rh, including condensation) does not affect the reliability of h t m 2 500 characteristics. l dedicated h t m15xx p r oduct a r e avail- able for extreme rh conditions (as h t m 2 520 for low dewpoints) - consult humirel for further information. h t m 2 500 m odelled l inear v o l t age o utput (v s 5 5v) e rror b udget at 23? 1000 2000 3000 4000 0102030405060708090100 relative humidity (% rh) output voltage (mv) v out 5 25.6 rh 1 1090.2 from 10 to 95% rh with v out in mv and rh in % h t m 2 5 00 t ypical measuring ranges in humidity rh (%) v out (mv) 10 1330 15 1475 20 1610 25 1740 30 1870 35 1995 40 2120 45 2235 50 2360 rh (%) v out (mv) 55 2480 60 2600 65 2730 70 2860 75 2980 80 3115 85 3250 90 3390 95 3530 1000 2000 2500 1500 3000 3500 4000 0102030405060708090100 relative humidity output voltage (mv) metrology h t m 2 500 range 2 6 2 5 2 2 2 1 0 1 2 4 2 3 2 3 4 5 6 01020 30 40 5060708090100 relative humidity (%rh) delta in % rh 2 1 2 0,1 0 0,5 2 2 2 1,5 1 1,5 2 01020 30 40 5060708090100 relative humidity (%rh) delta in % rh if needed , additional compensations can be done by using the following equations. 1. temperature coefficient: rh% = v out 10 -3 (39.1 2 0.056ta) 2 38.5 2. non linearity: rh% = -1.95e -9 v out 3 + 1.36e -5 v out 2 + 8.97e -3 v out - 21.5 h t m 2 500 error limits linearity error of h t m 2 500 module all equations v out in mv, rh in %, ta in ? . hpc0 32 re v . a j ul 20 01 reference output values
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 0 10 20 30 40 50 60 70 80 90 100 1000 1500 2000 2500 3000 3500 4000 output voltage (mv) relative humidity (%rh) %rh 5 0.0391 v out 2 42.5 from 10 to 95% rh with v out in mv and rh in % read aino convert rh% to bcd code send data to display calculate rh% using equation or using a look up table 2 123 79 0 10 20 30 40 50 60 70 80 90 100 1000 1500 2000 2500 3000 3500 4000 output voltage (mv) relative humidity (%rh) %rh 5 0.0391 v out 2 42.5 from 10 to 95% rh with v out in mv and rh in % t ypical h t m 2 500 r elative humidity measu r ement hu mi di ty m ea s ure me nt u si ng ht m 2 5 00 t em pe rat ure me as u re me nt u si ng ht m 2 5 00 ( nt c ou tp ut va lu es ) te mp in c r i n oh ms te mp in c r i n oh ms technical d a t a 3 - - . hpc0 32 re v . a j ul 200 1 15 43 7 - 2 5 1 2 5 546 - 30 169 149 - 20 9 4 14 3 - 15 71 17 2 - 10 54 30 8 - 5 41 50 5 0 32 014 +5 25 011 +1 0 19 69 1 + 15 15 6 18 + 20 12 47 4 + 2 5 10 00 0 +3 0 80 80 + 35 65 69 +4 0 53 72 +45 44 24 +5 0 36 61 + 55 30 39 +6 0 2 53 6 +65 21 28 su gges te d ap pli cati on
technical data 4 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. ?ypical?parameters can and do vary in different applications. all operating parameters, including ?ypical?must be validated for each customer applications by cus- tomer?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. hpc0 32 re v . a j ul 200 1 email: sales@humi r el.com l resistance to physical and chemical stresses . l h t m 2 500 has passed th r ough qualification p r ocesses of humirel including vibration, shock, storage, high temperatu r e and humidity, esd. l additional tests under harsh chemical conditions demonstrate good operation in presence of salt atmosphere, so 2 (o.5%), h 2 s (0.5%), o 3 , no x , no, co, co 2 , softener, soap, toluene, acids (h 2 so 4 , hno 3 , hcl), hmds, insecticide, cigarette smoke, a non exhaustive list. l h t m1500 is not light sensitive. l specific precautions l h t m 2 500 is not p r otected against r eversed polarity - check ca r efully when connecting the device. l if you wish to use h t m1500 in a chemical atmosphe r e not listed above, consult us. package outline h t m 2 500 dim min (mm) max (mm) a 53 55 b 74 . 3 76.3 c 11 . 2 11.6 d * 20 0 2 50 wire color function w1 br o wn r ou nd w3 y ellow hu mi di ty vol ta ge ordering inform a tion (mu l tiple p ackage quantity of 10 pieces). ht m 2 5 00 humidity analog vo l t age output module . www.humirel.com * specific lenght available on request gre en nt c re sis ta nc e w1 br o wn gr ou nd w2 wh it e s up pl y vol ta ge w3 y ellow hu mi di ty vol ta ge w 4 gre en nt c re sis ta nce w 5 bla ck s hi el d
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