Instrument Operator Verifies

The instrument operator verifies that the instrument is also usually calibrated for accuracy, variation and sensitivity. Variation refers to the instrument measured variable (can be understood as the input signal) many times from different directions at the same value, indicating value of the instrument, the biggest difference between or instrument under the condition of invariable condition in the world and the measured parameter changes from small to large (positive) and measured parameters from large to small changes (reverse) the degree of inconsistency, the difference between the two is the instrument of variation.