HM1520

TECHNICAL DATA PRELIMINARY DATA SHEET RELATIVE HUMIDITY MODULE HM1520 Based on the rugged HS1101 humidity sensor, HM1520 is a dedicated humidity transducer designed for measurements at low humidity. Direct measurement of dew point or water concentration can be easily obtained in really cost effective conditions. Direct interface with a micro-controller is made possible with the module’s linear voltage output. Main features • • • • • • • Tubular form for through wall mounting. Not affected by water condensation Full interchangeability. Typical 1 to 1.6 Volt DC output for 0 to 20% RH at 5 V DC supply. Calibrated, linear voltage for easy electronic interface. Controlled temperature dependency Ratiometric to voltage supply Humidity sensor specific features • • • No affected by long period at low humidity values. Patented solid polymer structure. High resistance to chemicals. • Fast response time. Maximum ratings Ratings Supply Voltage (Peak) Operating Range (see graph below) Operating Range (Dew Point) Operating Range in Temperature Symbol Vs RH Td Ta Value 12 0 to 100 -50 to 30 -30 to 60 Unit Vdc % RH °C °C Accuracy of HM1520 when used from 1 to 95% RH 10,0 8,0 6,0 4,0 2,0 0,0 -2,0 0 Optimized accuracy range 10 +/- 5 to 10% RH accuracy range +/- 3 to 5% RH accuracy range 20 30 40 50 60 70 80 90 100 -4,0 -6,0 -8,0 -10,0 Relative Humidity in % Rh Humirel Sensor Device Data / HPC009-20 RevA December 2000 1 TECHNICAL DATA Characteristics (Vs = 5.0Vdc , RL > 1 MΩ otherwise stated) Characteristics Humidity measuring range / Ta –30 to 60°C Symbol Min 1 Relative Humidity accuracy at 55% RH at 23°C RH RH RH Voltage supply Vs 4.75 Nominal output @ RH = 10 % / Ta 25°C V out Ic Tcc 1.17 Relative Humidity accuracy(1-20%RH) at 23°C Current consumption Temperature coefficient(10 to 50 °C and 1 to 20% RH) Typ Output Impedance Z Is Sink current capability (R L = 15 kohm) %RH %RH %RH 5.00 5.25 V 1.24 0.4 < 0.1 +26 70 1.31 0.8 V mA %RH / °C mV/%RH Ohms µA % RH %RH/yr s 300 Humidity Hysteresis +/-1.5 0.5 5 Long term stability τ Response time (5 to 10% RH, static, @63%) Unit 99 +/- 3 +/-2 +/-5 ∆mV/%RH Averaged Sensitivity from 5% to 10 % RH Max HM1520 Preliminary Specification when used from 1 to 30% RH 2000 * Vout= VS ( 5.12 RH + 197) or 1800 * RH = 0.195 Vout / VS - 38.5 1700 with V out in mV, V S in V and RH in % 1900 1600 1500 1400 1300 1200 1100 1000 0 5 10 15 20 25 30 35 Relative Humidity in % RH • • Those equations can be used above 30% RH and allow to obtain an over all accuracy as described in page one of this document in all the humidity measuring range Temperature (in the range 0 to 50°C) does not affect HM1520 measurement when used from 1 to 30% RH. No temperature compensation is required. • Signal output from 1 to 20% RH at 23°C : RH (%) 0 Vout (mV) 1 2 3 4 5 6 7 8 9 10 1243 1013 1038 1064 1089 1115 1141 1166 1192 1217 RH (%) 11 12 13 14 15 16 17 18 19 20 Vout (mV) 1269 1294 1320 1346 1371 1397 1422 1448 1474 1499 With Vs = 5.0 Volts DC Calibration data are traceable to NIST standards through CETIAT laboratory. Humirel Sensor Device Data / HPC009-20 RevA December 2000 2 TECHNICAL DATA IMPORTANT NOTICE : HM1520 is based on HS1101 capacitive sensor and thus is fully useable on a large range of relative humidity ( 1 to 99% RH). In that range, HM1520 presents a typical accuracy of +/-5% RH at 55% RH.) However HM1520 is a dedicated module for humidity measurements at low Relative Humidity levels. Thus, HM1520 is also well adapted to measure water concentrations (ppm) or low dew points when associated with an ambient temperature probe. HM1520 features an optimized accuracy for water concentration below 6000ppm water or 0°C dew point at 23°C (equivalent to 20% RH) . TYPICAL OUTPUT of HM1520 when measuring water concentration at ambient temperature of 23°C : ppm 0 Vout (mV) 275 550 825 1100 1375 1650 1925 2200 2470 2750 1013 1038 1064 1089 1115 1141 1166 1192 1217 1243 ppm 3025 3300 3570 3850 4120 4395 4670 4945 5220 5495 Vout (mV) 1269 1294 1320 1346 1371 1397 1422 1448 1474 1499 ppm water = 10.75 Vout - -10615 with Vout in mVolts TYPICAL OUTPUT of HM1520 when measuring dew point at ambient temperature of 23°C : °C -36 -29 -24 -21 -18.5 -16 -14.5 -13 -11.5 -10 Vout (mV) 1013 1038 1064 1089 1115 1141 1166 1192 1217 1243 °C -9 -7.8 -6.8 -5.8 -4.9 -4.1 -3.2 -2.5 -1.6 -1.1 Vout (mV) 1269 1294 1320 1346 1371 1397 1422 1448 1474 1499 Humirel Sensor Device Data / HPC009-20 RevA December 2000 3 TECHNICAL DATA Internal Block Diagram Reference Oscillator L.P. Filter Vout Vout--> Gain Sensor Oscillator Package outline HM1520 HM1500 A DIM B A B C D E MIN 9.70 5.00 52 10.7 100 MAX 10.20 5.50 54 11.1 250 DIMENSIONS IN MILLIMETERS D C WIRING WIRE COLOR FUNCTION W1 WHITE W2 BLUE VOLTAGE W3 YELLOW OUTPUT GND E W1 W2 W3 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, subsidiaries, affiliates and distributors harmless against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal 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. Humirel Sensor Device Data / HPC009-20 RevA December 2000 4