Bearing Tester with Non-Contact Tacho 77D11 Kohtect

Ideally, rolling bearing elements are separated by a protective lubricant film, which impedes their collision. However, manufacturing defects, damages, which appear during operation, dirt in the bearing, insufficient or incorrect lubrication – all these factors cause the collision of the bearing elements and, as a result, acoustic oscillations of a wide spectrum are generated in the bearing body.

Specification

Standard Conditions for Operation:


Operating temperature (device & sensor), -10 to 55°С, (±5)°С;
Relative humidity 80% at temperature 30 °С;
Atmospheric pressure, 84 to 106.7 KPa (630 - 800 mm Hg);
Resonance frequency, 32 kHz;
Measurement unit, dBi, dBc, dBm;
Range, max. 99dB;
Resolution, 1 dB;
Accuracy, ± 5%;
Operating temperature (tacho), 10 to 55°С, (±5)°С;
Tachometer range, 50-30,000rpm;
Tachometer resolution, 1rpm;
Tachometer sensing distance, up to 1m;
Memory capacity, 2MB;
PC communication port, USB;

System Specification:


Power supply, 3.6V NiMH rechargeable battery.
Continuous operation on batteries, not less than 10 hours.
Current consumption 220V, 50 Hz AC, not more than 5VA.
The limits of complementary error of the instrument at voltage changing from 3.6Volts to 2.8Volts.
Probability of no-failure operation, not less than 0.92 per 2000 hrs.
The average instrument life, not less than 10 years.
Failure time, 1000 hours. The average failure time is set for stan-dard conditions for operation.
Dimensions, not more than 60 х 110 х 30 (mm).
Weight, not more than 210 gram.