BI TECHNOLOGIES TT ELECTRONICS - MODEL 89 3 4" Rectangular Multiturn Cermet Trimming Potentiometer Owner's Manual

MODEL 89 3/4” Rectangular Multiturn Cermet Trimming Potentiometer

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 100m A 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 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 0.5 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) Fluorinert® is a registered trademark of 3M Company. Specifications subject to change without notice.

1-77 Model 89