TD4_D.qxd 13/8/03 3:12 pm Page 1 Nickel Film Temperature Sensor Welwyn Components TD4 • Good long term stability • Rugged construction • Extremely economic solution Electrical Data TD4 Actual Temperature range Resistance Range Alpha R25 = 100 ohms °C -55 to 155 ohms 20R to 1K ppm/°C 6000 R25 = 1000 ohms 5850 Standard value ohms Tolerance @25°C 100 ±°C 1.0 D F G ±°C 1.0 2.0 4.0 2.6 3.8 6.1 Tolerance Codes Interchangeability @25°C @100 Self Heating (in air) mW/°C 2.0 0.12 Recommended measuring current mA 1 Time constant (time to reach 50% of 10°C, in stirred water) secs 0.4 ohms >1G Insulation resistance 4.0 Note: Product can be calibrated at the factory, at extra cost Resistance vs Temperature Resistance Definitions Temperature R0 (1+At+Bt2) Temperature Resistance R = ohms °C ohms °C 66.6 -50 118.1 60 a = 70.6 -40 123.6 74.8 -30 129.2 70 R0 : 80 R100 : 79.1 -20 135.0 Resistance at 100°C 90 t Temperature 83.5 -10 140.9 100 88.0 0 146.9 110 Constants: 92.7 10 153.0 120 A : = 10000 (R0 - R100) R0 (ppm/°C) Resistance at 0°C 0.005247 97.5 20 159.3 130 B = 0.00000753 100 25 165.7 140 Ro = 88.0 102.5 30 172.2 150 107.6 40 112.8 50 Resistance v temperature for 100Ω sensor General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn’s own data and is considered accurate at time of going to print. A subsidiary of TT electronics plc © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com 188 Issue D · 08.03 13/8/03 3:12 pm Page 2 Nickel Film Temperature Sensor Welwyn Components TD4 TD4 tolerance vs temperature 5 4 3 2 Tolerance (°C) TD4_D.qxd 1 0 -1 -2 -3 -4 -5 -75 -50 -25 0 25 50 75 100 125 150 175 Temperature (°C) Performance Data for R0 = 100ohms Actual Performance Long term stability (1000hrs @ 155°C) Thermal shock (10 cycles -55°C to 155°C) Resistance @ 25°C % 0.18 Equivalent to °C 0.4 Resistance @ 25°C % 0.02 Equivalent to °C 0.04 Physical Data Dimensions (mm) & Weight (g) L max TD4 7.2 D max 2.5 f min 30 d nom 0.6 PCB Min Wt. mounting Bend nom centre Radius 10.2 0.6 d D L f 0.24 Construction Marking A nickel film is deposited onto a high quality ceramic rod. TD4: Type reference, resistance and tolerance code. Nickel-plated steel caps are force fitted to the rod and termination wires are welded to the caps. Packaging The standard packaging is in boxes. Taped sensors (on reel or in ammo pack) can also be supplied by special request. A laser is used to adjust the resistance value of the sensor by cutting a helix into the film The body is protected with a high purity organic coating. Standard Quantities Per Package Terminations Material Solder-coated copper wire Strength The terminations meet the requirements of IEC 68.2.21 Solderability The terminations meet the requirements of IEC115-1 Clause 4.17.3.2 Type TD4 Small box 250 Large box 1,000 Reel 5,000 Ammo pack 1,000 © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com Issue D · 08.03 189