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| Model 708 Vishay Spectrol 7/ 8" (22.2 mm) Single Turn Conductive Plastic Precision Potentiometer FEATURES * Virtually infinite resolution * Bushing mount and servo mount types available * Rotational life revolutions exceeds 20 million shaft RoHS COMPLIANT * Co-molded track and multi-finger wiper provide low noise signal * Ohmic value range: 500 to 50 k ELECTRICAL SPECIFICATIONS PARAMETER Total Resistance Standard Range: Tolerance: Linearity (Independent) Electrical Angle Power Rating Section 1: Additional Sections: Output Smoothness Insulation Resistance Dielectric Strength Taps (Extra) Phasing Temperature Coefficient of Resistance STANDARD 10 % STANDARD 0.5 % 340 5 1.0 W at 70 ambient derated to zero at 125 C 75 % of the rating of section 1 0.1 % maximum 1000 M minimum, 500 VDC 1000 VRMS, 60 Hz from Terminals to shaft Extra taps available as special Points at which output is 0.5 aligned 1 (ref. to section 1) 400 ppm/C maximum 500 to 50 k SPECIAL 5% SPECIAL 0.2 % ORDERING INFORMATION/DESCRIPTION The Model 708 can be ordered from this data sheet with a variety of alternate characteristics, as shown. For most rapid service on your order, please state: 708 MODEL B MOUNTING B: Bushing S: Servo 1 NUMBER OF SECTIONS Up to 6 10K TOTAL RESISTANCE OF EACH SECTION Beginning with the section nearest the mounting end BO1 PACKAGING Box of 1 piece Other characteristics will be standard as described on this data sheet. If special characteristics are required, such as: special linearity tolerance, special resistance tolerance, extra taps, non-linear functions, etc., please state these on your order and allow additional lead time for delivery. SAP PART NUMBERING GUIDELINES 708 MODEL S STYLE B: Bushing S: Servo 2 GANGS From 1 up to 6 102 OHMIC VALUE GANG NO 1 1K 103 OHMIC VALUE GANG NO 2 10K B01 PACKAGING Document Number: 57070 Revision: 02-Jul-07 For technical questions, contact: sfer@vishay.com www.vishay.com 41 Model 708 Vishay Spectrol 7/ 8" (22.2 mm) Single Turn Conductive Plastic Precision Potentiometer BUSHING MOUNT: 708 B DIMENSIONS in inches (millimeters) 0.010 1 0.308 MIN. (7.82) TYP. 0.062 (1.57) 0.687 (17.45) 0.500 (12.70) 0.250 (6.35) 0.031 3 30 TYP. 1 2 0.015 3/ 8 - 32 UNEF -2A + 0.0000 - 0.0010 0.015 O 0.4062 (10.32) O 0.875 (22.22) 0.640 R MAX. (16.26) + 0.0000 MTG. FACE O 0.1248 - 0.0003 (3.17) SERVO MOUNT: 708 S 0.010 0.031 1 0.687 (17.45) 0.062 (1.57) 0.062 (1.57) 0.062 (1.57) 0.500 (12.70) 0.015 O 0.875 (22.22) 2 1 O 0.750 MAX. (19.05) + 0.0000 O 0.7500 - 0.0005 (19.05) O 0.875 (22.22) CW 3 + 0.0000 SCHEMATIC MTG. FACE 1 O 0.1248 - 0.0003 (3.17) TOLERANCES: UNLESS OTHERWISE NOTED. DECIMALS 0.005 ANGLES 2 ADD 0.500 0.002 (12.70) FOR EACH ADDITIONAL SECTION MECHANICAL SPECIFICATIONS PARAMETER Rotation Bearing Type Servo Mount: Bushing Mount: Torque (Maximum) Servo, 1 Section Bushing, 1 Section Each Additional Section Runouts (Maximum) Shaft Runout (TIR/in) Pilot Dia. Runout (TIR) Lateral Runout (TIR) Shaft End Play Shaft Radial Play Weight (Maximum) Single Section: Each Additional Section: Ganging Moment of Inertia STARTING 0.10 oz. - in (7.20 g - cm) 0.25 oz. - in (18.00 g - cm) 0.10 oz. - in (7.20 g - cm) SERVO 0.002" (0.05 cm) 0.002" (0.05 cm) 0.002" (0.05 cm) 0.005" (0.13 cm) 0.002" (0.05 cm) 0.6 oz. (17.0 g) 0.2 oz. (5.67 g) 6 sections max, terminal alignment, added sections within 10 of section 1 terminals 0.12 g - cm2 per section maximum 360 continuous Ball bearing Sleeve bearing RUNNING 0.085 oz. - in (6.12 g - cm) 0.20 oz. - in (14.40 g - cm) 0.075 oz. - in (5.40 g - cm) BUSHING 0.002" (0.05 cm) 0.002" (0.05 cm) 0.005" (0.13 cm) 0.005" (0.13 cm) 0.004" (0.10 cm) www.vishay.com 42 For technical questions, contact: sfer@vishay.com Document Number: 57070 Revision: 02-Jul-07 Model 708 7/ " 8 (22.2 mm) Single Turn Conductive Plastic Precision Potentiometer Vishay Spectrol MATERIAL SPECIFICATIONS Housing and Lids Shaft Terminals Bushing Mount Hardware Lockwasher Internal tooth: Panel Nut: Aluminum, anodized Stainless steel, non-magnetic non-passivated Brass plated for solderability Steel, nickel plated Brass, nickel plated ENVIRONMENTAL SPECIFICATIONS Vibration Shock Salt Spray Rotational Life Load Life Temperature Range 15 g thru 2000 Hz 50 g 96 h Servo: 20 million shaft revolutions Bushing: 5 million shaft revolutions 900 h - 55 C to + 125 C MARKING Unit Identification Units shall be marked with Spectrol name, model no, and data code, and on each section, resistance, resistance tolerance, linearity and terminal identification POWER RATING CHART (Ratings for cup No. 1. Additional cups 75 % of values shown) RESISTANCE ELEMENT DATA RESISTANCE VALUES () 500 MAXIMUM VOLTAGE APPLICABLE (V) 22 32 45 71 100 141 224 RATED POWER IN W 2.0 1.5 1K 2K 5K 1.0 10K 0.5 0 20 40 60 80 100 120 140 160 20K 50K AMBIENT TEMPERATURE IN C Document Number: 57070 Revision: 02-Jul-07 For technical questions, contact: sfer@vishay.com www.vishay.com 43 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1 |
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