MODEL C 1-13/16” Diameter 3-Turn Wirewound 2 Precision Potentiometer ELECTRICAL Resistance Range, Ohms Standard Resistance Tolerance Minimum Practical Resistance Tolerance Independent Linearity Minimum Practical Independent Linearity 5 to 194.7K < 100 Ohms = ±5%, ≥ 100 Ohms = ±3% ±1% ±0.50% ±0.5%, ≤ 25 Ohms ±0.25%, 26-99 Ohms ±0.15%, 100-1K Ohms ±0.10%, >1K Ohms 3.0 at 40°C derating to 0 at 85°C 1,000Vdc not to exceed power rating 1,000V rms 1,000 Megohms 500 Ohms: RT ≤ 800 Ohms 250 Ohms: RT > 800 Ohms 1080° + 4° – 0° ≤ 25 Ohms = ±2°, < 100 Ohms = ±1.5° ≥ 100 Ohms = ±1.0° <100Ω = 1%, >100Ω = .5% Power Rating, Watts Input Voltage, Maximum 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 Static: –65°C to +85°C Dynamic: –40°C to +85°C 5 cycles, –65°C to +85°C (5% ∆R) 100G’s (0.1ms discontinuity max.) 10G’s, 10 to 500 Hz (5% ∆RT, 0.1ms discontinuity max.) Ten 24 hour cycles (3% ∆R) 1,000 hours at 85°C (5% ∆R) 2 mil. shaft rev. + 900 hrs. at rated wattage at 40°C (5% ∆R) Specifications subject to change without notice. Available in a Hybrid version – contact factory for details. 2-13 Model C MECHANICAL Total Mechanical Travel Number of Gangs, Maximum Weight, Nominal (Single Gang) Static Stop Strength Backlash, Maximum Panel Nut Tightening Torque, Maximum Shaft End Play, Maximum Shaft Runout, T.I.R., Maximum Pilot Diameter Runout, T.I.R., Maximum Lateral Runout, T.I.R., Maximum Shaft Radial Play, Maximum Start/Run Torque, Maximum (per gang) 1080° + 4° – 0° 3 2.5 oz. 350 oz.-in. 1° 25 lb.-in. .005” .0005” .002” .003” .004” 3.0 oz.-in. STANDARD RESISTANCE VALUES, OHMS Total Resistance Theoretical Resolution (% Nominal) Tempco of Wire 100 200 500 1K 2K 5K 10K 20K 50K 100K 0.084 0.074 0.056 0.051 0.044 0.032 0.027 0.021 0.017 0.015 ±20 ppm/°C ± 20 ppm/°C ± 20 ppm/°C + 130 ppm/°C * + 130 ppm/°C * + 130 ppm/°C * + 130 ppm/°C * ± 20 ppm/°C ± 20 ppm/°C ±20 ppm/°C * Lower tempco available - contact factory for details. 2-14 Model C OUTLINE DIMENSIONS (Inch/mm) Dim. “L” Dim. “RS” No.of Gangs 1.203 30.56 2.016 51.12 1 2.494 63.348 Max. 2.480 62.992 3.297 83.744 2 3.534 89.764 Max. 3.513 89.230 4.328 109.931 3 2 Mounting Surface RS .062±.016 1.58±0.41 M .812±.031 20.6±0.79 L Slider Dim. “M” 1.141 28.98 Max. CCW +.000 .406 -.002 +0.000 Dia. 10.312 -0.051 CW 1.250 R Max. 31.75 +.0000 -.0003 +0.0000 Dia. 6.3424 -0.0076 .2497 1.812±.016 46.03±0.41 Dia. .562±.016 14.3±0.41 Chamfer .312±.025 7.93±0.64 .062±.016 1.58±0.41 .016 Max. x 45° 0.41 3/ -32 UNEF Thread 8 2 & 3 Gang Outline .312±.016 7.93±0.41 Locating Lug .125±.005/3.175±0.127 Dia. Positioned as Shown ±5° METRIC CONVERSIONS 1 in. 1 oz. 25.4mm 28.4 gm 2-15 1 oz.-in. 1 lb.-in. 0,007 N-m 0,113 N-m Model C SPECIAL FEATURE CODES Center Tap Linearity Tape Rear Shaft Extension Flatted Shaft Slotted Shaft Shaft Lock Color Coded Additional Gangs CT LT RS FS SS SL CC 2G or 3G ORDERING INFORMATION C R 10K T2 L .2 XX Optional Special Feature Code Model Series Resistance Prefix Linearity Resistance Value Optional Non-Standard Tolerance MATCHING TURNS COUNTING DIALS 2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S, 2126, RB CIRCUIT DIAGRAM NOTES 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) 2-16 Model C