MODEL 7280 SERIES
7/8” Diameter 10-Turn Wirewound
Precision Potentiometer
E L E C T R I C A L
Resistance Range, Ohms
100 to 100K
Standard Resistance Tolerance
±5%Minimum Practical Resistance Tolerance ±1%Independent Linearity
±0.25%
Minimum Practical Independent Linearity ±0.15%, < 300 Ohms ±0.075%, ≥300 Ohms
Power Rating, Watts 2.0 at 70°C derating to 0 at 125°C
Dielectric Strength
1,000V rms Insulation Resistance, Minimum 1,000 Megohms
Noise, Maximum
100 Ohms
Actual Electrical Travel 3600°+ 10°– 0°, > 100 Ohms 3600°+ 10°– 5°, ≤100 Ohms
Tap Tolerance
±3°
End Voltage, Maximum 0.25% of input voltage
M O D E L S T Y L E S
72811/8” Shaft, 1/4” Bushing
72831/8” Shaft, Servo
72846mm Shaft, 3/8” Bushing 7286
1/4” Shaft, 3/8” Bushing 7288 (for heavy side load applications) NEW PRODUCT
1/4” Shaft, 3/8” Bushing
Specifications subject to change without notice.
E N V I R O N M E N T A L(M I L-R-12934)
Operating Temperature Range Static: –55°C to +125°C
Dynamic: –40°C to +125°C Temperature Cycling 5 cycles, –55°C to +125°C (5% ?R) Shock, 6ms Sawtooth100G’s (0.1ms discontinuity max.) Vibration15G’s, 10 to 2,000 Hz (5% ?R, 0.1ms discontinuity max.) Moisture Resistance Five 24 hour cycles (3% ?R) High Temperature Exposure1,000 hours at 125°C (5% ?R) Rotational Load Life 1 mil. shaft rev. + 900 hrs. at rated wattage at 70°C (5% ?R) Rotational Life Model 7288 (1 pound Side Load) 1 mil. shaft rev. + 900 hrs. at rated wattage at 70°C (5% ?R)
M E C H A N I C A L
Total Mechanical Travel3600°+ 15°– 0°Number of Gangs, Maximum2 Weight, Nominal (single gang)0.75 oz. Backlash, Maximum1°
7281, 7284, 72867283 Static Stop Strength60 oz.-in.36 oz.-in. Panel Nut Tightening Torque, Maximum25 lb.-in.N/A Shaft End Play, Maximum.010”.005”Shaft Runout, T.I.R., Maximum.003”.002”Pilot Diameter Runout, T.I.R., Maximum.004”.002”Lateral Runout, T.I.R., Maximum.005”.004”Shaft Radial Play, Maximum.003”.002”Start/Run Torque, Maximum (per gang)0.8 oz.-in.0.6 oz.-in.
S T A N D A R D R E S I S T A N C E V A L U E S,O H M S
Theoretical
Total Resolution Tempco Resistance(% Nominal)of Wire
1000.059±20 ppm/°C
2000.037±20 ppm/°C
5000.030±20 ppm/°C
1K0.024±20 ppm/°C
2K0.020±20 ppm/°C
5K0.018±20 ppm/°C
10K0.017±20 ppm/°C
20K0.016±20 ppm/°C
50K0.010±20 ppm/°C
100K0.008±20 ppm/°C
O U T L I N E D I M E N S I O N S (I n c h /m m
)
O P T I O N A L T E R M I N A L C O N F I G U R A T I O N
O P T I O N A L T E R M I N A L C O N F I G U R A T I O N
O U T L I N E D I M E N S I O N S(I n c h/m m)
M E T R I C C O N V E R S I O N S
1 in.25.4 mm 1 oz.28.4 gm 1 oz.-in.0,007 N-m 1 lb.-in.0,113 N-m
O R D E R I N G I N F O R M A T I O N
7286 R 10K T2 L .25 XX
Model Series Resistance Prefix Resistance Value
Optional Special Feature Code
Linearity
Optional
Non-Standard Tolerance
N O T E S
C I R C U I T
D I A G R A M M A T C H I N G T U R N S C O U N T I N G D I A L S
S P E C I A L F E A T U R E S
Center Tap CT Linearity Tape
LT Rear Shaft Extension (7283, 7286 single cup only)RS Gold Plated Solder Lug Terminals (See Optional Terminal Configuration)
FT