Please enable JavaScript.
Coggle requires JavaScript to display documents.
STATIC AND DYNAMIC CHARACTERISTICS OF INSTRUMENTS (Type (Dynamic…
STATIC AND DYNAMIC CHARACTERISTICS OF INSTRUMENTS
Type
Static Characteristics
do no change with time
Error
No measurments can be made with perfect accuracy and precision
Error = indicated value, Vi - actual value , Va
Type
Systematic or Cumulative Error
Have the same magnitude & sign for a given set of conditions
1 more item...
Accidental/Random Error
lack of consistency is the measured values when the same input is imposed repeatedly in the instrument
1 more item...
Miscellaneous Type of Gross Error
Either systematic/random error
1 more item...
Accuracy-Precision
how closely the reading of the instrument approaches the true value
Type
Accuracy
how closely the instrument measure the actual value
Accuracy=(Result - Actual value)/Actual value x100
Precision
The ability of measurement to produce the same output value on every time
Sensitivity
ratio of the output to the magnitude of the input signal
Static sensitivity,K=(change of output signal)/(change in input signal)
Reproductibility
the difference between the largest and the smallest result
Drift
the variation of output for a given input
Type
Zero Drift
Sensitive Drift
Dead zone
area of signal when no action occurs
Dynamic Characteristics
can be determined by applying a known and predetermined input signal to its primary element and the studying the output
Type
Periodic Signals with Time Period
-Varying cyclically with time or repeating itself after a constant interval
Transient Signal
Varying non - cyclically with time
Random Signal
Varying randomly with time,with no definite period and amplitude
First order system
there is zero mass in the the first order system
Second order system
the difference of second order system with first order system is it consist of a mass