1

1-77

Model 89

ELECTRICAL

Standard Resistance Range, Ohms

10 to 2Meg

Standard Resistance Tolerance

±10% (<100 Ohms = ±20%)

Input Voltage, Maximum

200 Vdc or rms not to exceed power rating

Slider Current, Maximum

100mA or within rated power, whichever is less

Power Rating, Watts

0.75 at 85°C derating to 0 at 125°C

End Resistance, Maximum

2 Ohms

Actual Electrical Travel, Turns, Nominal

20

Dielectric Strength

1,000 Vrms

Insulation Resistance, Minimum

1,000 Megohms

Resolution

Essentially infinite

Contact Resistance Variation, Maximum

1% or 1 Ohm, whichever is greater

ENVIRONMENTAL

Seal

85°C Fluorinert® (No Leaks)

Temperature Coefficient, Maximum

±100ppm/°C

Operating Temperature Range

–55°C to +125°C

Thermal Shock

5 cycles, –55°C to +125°C (1%

∆RT, 1% ∆VR)

Moisture Resistance

Ten 24 hour cycles (1%

∆RT, IR 100 Megohms Min.)

Shock, 6ms Sawtooth

100G’s (1%

∆RT, 1% ∆VR)

Vibration

20G’s, 10 to 2,000 Hz (1%

∆RT, 1% ∆VR)

High Temperature Exposure

250 hours at 125°C (2%

∆RT, 2% ∆VR)

Rotational Life

200 cycles (3%

∆RT)

Load Life at 0.75 Watts

1,000 hours at 70°C (2%

∆RT)

Resistance to Solder Heat

260°C for 10 sec. (1%

∆RT)

MECHANICAL

Mechanical Stops

Clutch Action, both ends

Torque, Starting Maximum

5 oz.-in. (0.035 N-m)

Weight, Nominal

.05 oz. (1.4 grams)

MODEL 89

3/4” Rectangular

Multiturn

Cermet Trimming

Potentiometer

Fluorinert® is a registered trademark of 3M Company.

Specifications subject to change without notice.