2
2-89 Model 7246
MODEL 7246
7/8” Diameter
10–Turn
Wirewound
Precision Potentiometer
ELECTRICAL
Resistance Range, Ohms 10 to 125K
Standard Resistance Tolerance ±5%
Minimum Practical Resistance Tolerance ±3%
Independent Linearity ±0.25%
Minimum Practical Independent Linearity ±0.25%, <100 Ohms
±0.15%, ≥100 Ohms
Power Rating, Watts 2.0 at 25°C derating to 0 at 85°C
Dielectric Strength 1,000V rms
Insulation Resistance, Minimum 1,000 Megohms
Noise, Maximum 100 Ohms
Actual Electrical Travel 3600° + 10° – 0°
Tap Tolerance ±5°, ≤20 Ohms
±3°, 21-50 Ohms
±2°, >50 Ohms
End Voltage, Maximum (% of input voltage) 0.5%, <100 Ohms
0.25%, ≥100 Ohms
Specifications subject to change without notice.
Available in a Hybrid version – contact factory for details.
ENVIRONMENTAL (MIL-R-12934)
Operating Temperature Range –25°C to +85°C
Temperature Cycling 5 cycles, –25°C to +85°C (10% ∆R)
Shock, 6ms Sawtooth 50G’s (0.1ms discontinuity max.)
Vibration 10G’s, 10 to 500 Hz (2% ∆R, 0.1ms discontinuity max.)
Moisture Resistance Five 24 hour cycles (25% ∆R)
High Temperature Exposure Mechanical Operation at 85°C (0.5% ∆R)
Rotational Load Life 1 mil. shaft rev. (10% ∆R)
2-90 Model 7246
SPECIAL FEATURES
Center Tap CT
Linearity Tape LT
Flatted Shaft FS
Shaft Lock SL
STANDARD RESISTANCE VALUES, OHMS
Theoretical
Total Resolution Tempco
Resistance (% Nominal) of Wire
10 0.083 + 800 ppm/°C *
50 0.048 + 800 ppm/°C *
100 0.040 + 800 ppm/°C *
200 0.033 + 800 ppm/°C *
500 0.031 ±20 ppm/°C
1K 0.028 ±20 ppm/°C
2K 0.025 ±20 ppm/°C
5K 0.020 ±130 ppm/°C *
10K 0.018 ±130 ppm/°C *
20K 0.016 ±130 ppm/°C *
50K 0.012 ±20 ppm/°C
100K 0.011 ±20 ppm/°C
* Lower tempco available as a special model.
MECHANICAL
Total Mechanical Travel 3600° + 10° – 0°
Number of Gangs, Maximum 1
Weight, Nominal 1.25 oz.
Static Stop Strength 60 oz.-in.
Backlash, Maximum 2°
Panel Nut Tightening Torque, Maximum 25 lb.-in.
Shaft End Play, Maximum .015”
Shaft Radial Play, Maximum .005”
Start/Run Torque, Maximum 0.8 / 0.6 oz.-in.
2
2-91 Model 7246
OUTLINE DIMENSIONS (Inch/mm)
.625
15.9 R Max.
Slot
.032±.005
0.813±0.127 Wide
.032+.010
-.000
0.813+0.254
-0.000
Deep
Angular Location
Optional
.875±.016
22.2±0.41 Dia.
Mounting Surface
.812±.031
20.6±0.79 +.0000
-.0005
+0.0000
-0.0127
Dia.
+.000
-.002
+0.00
-0.05
Dia.
.2500
6.350
.406
10.312
Chamfer
.016/0.41 Max. x 45°
3/8 - 32 UNEF Thread
.312±.016
7.93±0.41
+.000
-.010
+0.00
-0.25
.062
1.575
Dia.
1.469
37.31 Max.
Slider
CCW CW
ORDERING INFORMATION
7246 R 10K T2 L .25 XX
Model Series
Resistance Prefix
Resistance Value
Optional Special
Feature Code
Linearity
Optional
Non-Standard Tolerance
MATCHING TURNS COUNTING DIALS
2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S, 2126, RB
(CCW)
(S)
(CW)
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.
Tolerances unless otherwise specified:
Linear = ± .01 inches
(.25mm)
Angular = ± 2 degrees
NOTES
mm
INCH
CIRCUIT DIAGRAM
