... an instrument that immediately gives a result: a caliper to measure a length, a multimeter for a difference of potential, a frequency meter for a frequency. ... the multimeter compares the unknown voltage to that of its Zener diode, the frequency meter compares the unknown ... This is true of digital frequency meters if the user can choose between the inbuilt quartz and an external synchronization signal.
|Title||:||Metrology in Industry|
|Author||:||French College of Metrology|
|Publisher||:||John Wiley & Sons - 2013-03-01|