Series 7480 Precision Multi-Turn Potentiometer
7/8" Diameter, 5-Turn Wirewound Element
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5-Turn Wirewound element |
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±5% Resistance Tolerance Standard |
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±0.25% Independent Linearity Standard |
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1/8" or 1/4" Shaft |
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1/4" or 3/8" Bushing; Servo Mount |
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Model Styles
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7481
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1/8" Shaft, 1/4" Bushing |
7483
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1/8" Shaft, Servo |
7486
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1/4" Shaft, 3/8" Bushing |
7488
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1/4" Shaft, 3/8" Bushing
(for heavy side load applications) |
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Electrical Specifications
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Resistance Range
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100 to 50K Ohms |
Resistance Tolerance
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±5% Standard; up to ±1% available
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Independent Linearity
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±0.25% (Standard)
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Power Rating
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1.5 W at 70°C derating to 0 W at 125°C
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Dielectric Strength
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1,000V rms
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Insulation Resistance
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1,000 Megohms minimum |
Noise
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100 ohms maximum |
Actual Electrical Travel
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1080° +10° -0° (> 100 Ohms)
1080° +10° -5° (≤ 100 Ohms) |
Tap Tolerance
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±3° |
End Voltage
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0.25% of input voltage maximum
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Mechanical Specifications
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Total Mechanical Travel
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1080° +15° -0° |
Number of Gangs
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2 maximum
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Weight
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0.75 oz. Nominal (single gang) |
Backlash
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1°
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Static Stop Strength
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7481, 7486 - 60 oz.-in.
7483 - 36 oz.-in. |
Panel Nut Tightening Torque
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7481, 7486 - 25 lb.-in. maximum
7483 - N/A
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Shaft End Play
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7481, 7486 - .010" maximum
7483 - .005" maximum
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Shaft Runout, T.I.R.
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7481, 7486 - .003" maximum
7483 - .002" maximum
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Pilot Diameter Runout, T.I.R.
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7481, 7486 - .004" maximum
7483 - .002" maximum
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Lateral Runout, T.I.R.
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7481, 7486 - .005" maximum
7483 - .004" maximum
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Shaft Radial Play
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7481, 7486 - .003" maximum
7483 - .002" maximum
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Start/Run Torque
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7481, 7486 - 1.2 oz.-in. maximum
7483 - 0.9 oz.-in. maximum
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Environmental Specifications (MIL-R-12934)
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Temperature Range
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Static: -55°C to +125°C
Dynamic: -40°C to +125°C
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Temperature Cycling
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5 cycles, -55°C to +125°C (5% ΔR)
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Shock
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100G's, 6ms Sawtooth
(0.1ms discontinuity max.)
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Vibration
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15G's, 10 to 2,000 Hz
(5% ΔR, 0.1ms discontinuity max.)
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Moisture Resistance
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Five 24 hour cycles (3% ΔR)
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High Temp Exposure
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1,000 hours at 125°C (5% ΔR)
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Rotational Load Life
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1 mil. shaft rev. + 900 hrs. at rated wattage at 70°C (5%ΔR)
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Rotational Life
Model 7488
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1 mil. shaft rev. + 900 hrs. at rated wattage at 70°C (5%ΔR). 1 pound Side Load
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