Quiz 1. Constraints

Question 1

define accuracy

Answer 1

“average closer to ‘true’ value”
– The difference between the true value and the
measured value divided by the true value.

– Expressed as a percentage of the reading

Question 2

precision

Answer 2

“aka repeatability”
– A measurement that expresses the number of
distinguishable alternatives from which a given
result is selected.

– The fineness to which an instrument can be read
repeatedly and reliably

Question 3

sensitivity

Answer 3

An absolute quantity used in analog instruments

The smallest absolute amount of change that can
be detected by a measurement

Question 4

resolution

Answer 4

The smallest incremental quantity that can be

distinguished with certainty – usually A/D

Question 5

reproducibility

Answer 5

The ability of an instrument to give the same
output for equal inputs applied over a given
period of time - precision

Question 6

input range

Answer 6

– Scope, (in previous example = 1V)

Question 7

input (and output) impedance

Answer 7

– Drain or draw on energy

Question 8

what are two types of error? and explain both

Answer 8

• systematic/bias error=can be removed by calibration

- random errors= can be removed by taking multiple measurements and averaging the results

Question 9

what are the sources of error

Answer 9

accumulation error= combination of errors from
system components

– improper functioning =improper maintenance or
adjustment can cause zero offset, range,
sensitivity, or other errors

– Environmental errors = heat, physical

Question 10

KNOW HOW TO DO PERCENT ERROR EQUATION

Answer 10

X

Question 11

REALLY IMPORTANT MATH PROBS THAT YOU NEED TO REVIEW AND PAY ATTENTION TO PROBLEM #3

Answer 11

X