Citation

Russell JR, Lambourn RF. Forensic Sci. Int. 1984; 24(1): 81-86.

Copyright

(Copyright © 1984, Elsevier Publishing)

DOI

unavailable

PMID

6698456

Abstract

The process of calibrating a tachograph makes use of a mechanical head drive unit and an electronic clock tester. Both these devices should be checked against a standard at 6-month intervals. The design of such a substandard, based on a highly stable 1 MHz crystal oscillator, is described.

Language: en