chronometric tachometer

chronometric tachometer

[¦krän·ə¦me·trik tə′käm·əd·ər]
(engineering)
A tachometer which repeatedly counts the revolutions during a fixed interval of time and presents the average speed during the last timed interval.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.