MODEL 89
1
3/4” Rectangular
Multiturn
Cermet Trimming
Potentiometer
ELECTRICAL
Standard Resistance Range, Ohms
Standard Resistance Tolerance
Input Voltage, Maximum
Slider Current, Maximum
Power Rating, Watts
End Resistance, Maximum
Actual Electrical Travel, Turns, Nominal
Dielectric Strength
Insulation Resistance, Minimum
Resolution
Contact Resistance Variation, Maximum
10 to 2Meg
±10% (<100 Ohms = ±20%)
200 Vdc or rms not to exceed power rating
100mA or within rated power, whichever is less
0.75 at 85°C derating to 0 at 125°C
2 Ohms
20
1,000 Vrms
1,000 Megohms
Essentially infinite
1% or 1 Ohm, whichever is greater
ENVIRONMENTAL
Seal
Temperature Coefficient, Maximum
Operating Temperature Range
Thermal Shock
Moisture Resistance
Shock, 6ms Sawtooth
Vibration
High Temperature Exposure
Rotational Life
Load Life at 0.75 Watts
Resistance to Solder Heat
85°C Fluorinert® (No Leaks)
±100ppm/°C
–55°C to +125°C
5 cycles, –55°C to +125°C (1% ∆RT, 1% ∆VR)
Ten 24 hour cycles (1% ∆RT, IR 100 Megohms Min.)
100G’s (1% ∆RT, 1% ∆VR)
20G’s, 10 to 2,000 Hz (1% ∆RT, 1% ∆VR)
250 hours at 125°C (2% ∆RT, 2% ∆VR)
200 cycles (3% ∆RT)
1,000 hours at 70°C (2% ∆RT)
260°C for 10 sec. (1% ∆RT)
MECHANICAL
Mechanical Stops
Torque, Starting Maximum
Weight, Nominal
Clutch Action, both ends
5 oz.-in. (0.035 N-m)
.05 oz. (1.4 grams)
Fluorinert® is a registered trademark of 3M Company.
Specifications subject to change without notice.
1-77
Model 89
