Conditions of Use: tachometer in an ambient temperature of -20 ~ 50 ℃, relative humidity below 85% of the normal work environment.
Basic error: tachometer in the case of 20 ± 2 ℃, the basic error of measurement of the upper limit of ± 2%.
Temperature effect: when the temperature changes from 20 ± 2 ℃ to -20 ~ 50 ℃, the speed table Additional temperature error of the temperature does not exceed the absolute value of the basic error limit.