MODEL 7246 7/8" Diameter 10-Turn Wirewound 2 Precision Potentiometer ELECTRICAL Resistance Range, Ohms Standard Resistance Tolerance Minimum Practical Resistance Tolerance Independent Linearity Minimum Practical Independent Linearity 10 to 125K 5% 3% 0.25% 0.25%, <100 Ohms 0.15%, 100 Ohms 2.0 at 25C derating to 0 at 85C 1,000V rms 1,000 Megohms 100 Ohms 3600 + 10 - 0 5, 20 Ohms 3, 21-50 Ohms 2, >50 Ohms 0.5%, <100 Ohms 0.25%, 100 Ohms Power Rating, Watts Dielectric Strength Insulation Resistance, Minimum Noise, Maximum Actual Electrical Travel Tap Tolerance End Voltage, Maximum (% of input voltage) ENVIRONMENTAL (MIL-R-12934) Operating Temperature Range Temperature Cycling Shock, 6ms Sawtooth Vibration Moisture Resistance High Temperature Exposure Rotational Load Life -25C to +85C 5 cycles, -25C to +85C (10% R) 50G's (0.1ms discontinuity max.) 10G's, 10 to 500 Hz (2% R, 0.1ms discontinuity max.) Five 24 hour cycles (25% R) Mechanical Operation at 85C (0.5% R) 1 mil. shaft rev. (10% R) Specifications subject to change without notice. Available in a Hybrid version - contact factory for details. 2-89 Model 7246 MECHANICAL Total Mechanical Travel Number of Gangs, Maximum Weight, Nominal Static Stop Strength Backlash, Maximum Panel Nut Tightening Torque, Maximum Shaft End Play, Maximum Shaft Radial Play, Maximum Start/Run Torque, Maximum 3600 + 10 - 0 1 1.25 oz. 60 oz.-in. 2 25 lb.-in. .015" .005" 0.8 / 0.6 oz.-in. STANDARD RESISTANCE VALUES, OHMS Total Resistance Theoretical Resolution (% Nominal) 10 50 100 200 500 1K 2K 5K 10K 20K 50K 100K 0.083 0.048 0.040 0.033 0.031 0.028 0.025 0.020 0.018 0.016 0.012 0.011 Tempco of Wire + 800 ppm/C * + 800 ppm/C * + 800 ppm/C * + 800 ppm/C * 20 ppm/C 20 ppm/C 20 ppm/C 130 ppm/C * 130 ppm/C * 130 ppm/C * 20 ppm/C 20 ppm/C * Lower tempco available as a special model. SPECIAL FEATURES Center Tap Linearity Tape Flatted Shaft Shaft Lock CT LT FS SL 2-90 Model 7246 OUTLINE DIMENSIONS (Inch/mm) Mounting Surface .812.031 20.60.79 +.0000 .2500 -.0005 Dia. +0.0000 6.350 -0.0127 +.000 .406 -.002 Dia. +0.00 10.312 -0.05 1.469 Max. 37.31 Slider CCW CW +.000 .062 -.010 Dia. +0.00 1.575 -0.25 Chamfer .016/0.41 Max. x 45 3/8 - 32 UNEF Thread .625 R Max. 15.9 2 Slot .032.005 Wide 0.8130.127 .875.016 Dia. 22.20.41 .032+.010 -.000 Deep 0.813+0.254 -0.000 Angular Location Optional .312.016 7.930.41 ORDERING INFORMATION 7246 R 10K T2 L .25 XX Optional Special Feature Code Model Series Resistance Prefix Resistance Value Linearity Optional Non-Standard Tolerance MATCHING TURNS COUNTING DIALS 2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S, 2126, RB NOTES CIRCUIT DIAGRAM Metric equivalents, based on 1 inch = 25.4mm are rounded to the same number of significant figures as in the original English units and are provided for general information only. (S) (CCW) INCH mm Tolerances unless otherwise specified: Linear = .01 inches (.25mm) Angular = 2 degrees (CW) 2-91 Model 7246