Desirable qualitues of a measuring instrument wuira
Answers
Answer:
Explanation:
No zero error
Precision and accuracy
No wear and tear
Answer:
The static characteristics of instruments are attributes that change slowly with time. Static characteristics can be divided in to desirable and undesirable.
Desirable characteristics - what we want to achieve - are
Accuracy Sensitivity Repeatability Reproducibility
Undesirable characteristics - what we want to avoid - are
Drift Dead zone Threshold Hysteresis (lag between change and effect); Creep; Resolution
Static error
Perhaps a teacher has summed up these into 8 concepts, probably 4 good and 4 bad, because teachers often like things nice and neat.
Just to take on static characteristic - CREEP. Once a teacher told us “some things are constant in the world. A metronome clicks off time accurately. Watch - I will start two metronomes, both set to 90 beats per minute. For the first several beats, both metronomes swung together, and we basked in the Truth of Science. Then they began too diverge - one of them was just a TINY BIT faster or slower than the other. After two minutes had passed the metronome clocks were answering each other instead of clicking together. We all laughed, and even the professor could not help but produce a wrinkle of a smile.