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Temperature Sensors HEL-776/HEL-777 Platinum RTDs FEATURES HEL-776 and HEL-777 platinum RTDs are (cid:49) Linear resistance vs temperature designed to measure temperatures from (cid:49) Accurate and Interchangeable −55(cid:176) to +150(cid:176) C (−67(cid:176) to 302(cid:176) F) in print- (cid:49) Excellent stability ed circuit boards, temperature probes, or (cid:49) Small size other lower temperature applications. (cid:49) Printed circuit mountable Solderable leads in 0.050(cid:78)or 0.100(cid:78)spac- (cid:49) Ceramic SIP package ing provide strong connections for wires or printed circuits. TYPICAL APPLICATIONS (cid:49) HVAC – room, duct and refrigerant The 1000(cid:86), 375 alpha version, provides equipment 10x greater sensitivity and signal-to- (cid:49) Instrument and probe assemblies noise. Both are ideal for air temperature (cid:49) Electronic assemblies – temperature sensing. compensation (cid:49) Process control – temperature regulation ORDER GUIDE Fig. 1: Wheatstone Bridge 2-Wire Interface HEL-776-A Molded SIP pkg. 0.100(cid:78)lead spacing HEL-777-A Molded SIP pkg. 0.100(cid:78)lead spacing -U 1000(cid:86), 0.00375 (cid:86)/(cid:86)/(cid:176) C -T 100(cid:86), 0.00385 (cid:86)/(cid:86)/(cid:176) C -0 ±0.2% Resistance Trim (Standard) -1 ±0.1% Resistance Trim (Optional) MOUNTING DIMENSIONS (for reference only) mm/in. HEL-776-A Fig. 2: Linear Output Voltage T e m Fig. 3: Adjustable Point (Comparator) Interface p e r a t u r e HEL-777-A CAUTION PRODUCT DAMAGE The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation, take normal ESD precautions when handling this product. Honeywell(cid:49)MICRO SWITCH Sensing and Control(cid:49)1-800-537-6945 USA(cid:49)(cid:70)1-815-235-6847 International(cid:49)1-800-737-3360 Canada 91

Temperature Sensors HEL-776/HEL-777 Platinum RTDs FUNCTIONAL BEHAVIOR ACCURACY VS TEMPERATURE R (cid:74)R(1+AT+BT2−100CT3+CT4) T 0 Tolerance Standard ±0.2% Optional ±0.1% RT (cid:74)Resistance ((cid:86)) at temperature T ((cid:176)C) R (cid:74)Resistance ((cid:86)) at 0(cid:176)C Temperature ±(cid:68)R* ±(cid:68)T ±(cid:68)R* ±(cid:68)T 0 T (cid:74)Temperature in (cid:176)C ((cid:176)C) ((cid:86)) ( (cid:176) C) ((cid:86)) ((cid:176) C) A (cid:74)(cid:97)+ (cid:97)(cid:100) B (cid:74) −(cid:97)(cid:100) CT<0(cid:74) −(cid:97)(cid:98) −200 6.8 1.6 5.1 1.2 100 1002 1004 −100 2.9 0.8 2.4 0.6 0 2.0 0.5 1.0 0.3 100 2.9 0.8 2.2 0.6 CONSTANTS 200 5.6 1.6 4.3 1.2 Alpha,(cid:97)((cid:176)C -1) 0.00375 0.003850 300 8.2 2.4 6.2 1.8 ±0.000029 ±0.000010 400 11.0 3.2 8.3 2.5 Delta,(cid:100)((cid:176)C) 1.605 ± 0.009 1.4999 ±0.007 500 12.5 4.0 9.6 3.0 Beta,(cid:98)((cid:176)C) 0.16 0.10863 600 15.1 4.8 10.4 3.3 A ((cid:176)C -1) 3.81×10-3 3.908×10-3 * 1000(cid:86)RTD. Divide (cid:68)R by 10 for 100(cid:86)RTD. B ((cid:176)C -2) −6.02×10-7 −5.775×10-7 C ((cid:176)C -4) −6.0×10-12 −4.183×10-12 RESISTANCE VS TEMPERATURE CURVE Both (cid:98)(cid:74)0 and C (cid:74)0 for T>0(cid:176)C SPECIFICATIONS Sensor Type Thin film platinum RTD: R (cid:74)1000 (cid:86)@0(cid:176) C; alpha (cid:74)0.00375 (cid:86)/(cid:86)/(cid:176)C 0 R (cid:74)100 (cid:86)@0(cid:176) C; alpha (cid:74)0.00385 (cid:86)/(cid:86)/(cid:176)C 0 Temperature Range −55(cid:176) to +150(cid:176) C (−76(cid:176) to +302(cid:176) F) Temperature Accuracy ±0.5(cid:176)C or 0.8% of temperature (cid:176)C (R ±0.2% trim), whichever is greater 0 ±0.3(cid:176)C or 0.6% of temperature (cid:176)C (R ±0.1% trim), whichever is greater (optional) 0 Base Resistance and 1000 ± 2 (cid:86) (±0.2%) @ 0(cid:176)C or 100 ± 0.2 (cid:86) (±0.2%) @ 0(cid:176)C Interchangeability, R0±(cid:68)R0 1000 ± 1 (cid:86) (±0.1%) @ 0(cid:176)C or 100 ± 0.1 (cid:86) (±0.1%) @ 0(cid:176)C (optiona l) Linearity ±0.1% of full scale for temperatures spanning −40(cid:176) to 125(cid:176)C Time Constant <10 seconds in air at 10 ft/sec Operating Current 2 mA maximum for self heating errors of <1(cid:176)C; 1 mA recommended Stability <0.25(cid:176)C/year; 0.05 (cid:176)C per 5 years in occupied environments Self Heating <15mW/(cid:176)C typical Insulation Resistance >50 M(cid:86)@50 VDC @25(cid:176)C Construction Plastic case, PLASKON 3300SH Lead Material Copper alloy 194 solder dipped tin silver 92 Honeywell(cid:49)MICRO SWITCH Sensing and Control(cid:49)1-800-537-6945 USA(cid:49)(cid:70)1-815-235-6847 International(cid:49)1-800-737-3360 Canada