Abstract

Baird Atomic Direct Readers, having clock-indicating outputs, frequently present early difficulty in reading the clocks properly. For every revolution of the large hand (40 clock units), the small hand moves 45 degrees (5 clock units). One must learn to add mentally 40 clock units to the large-hand reading for every 45-degree travel of the small hand. The subsequent clock readings are then referred to a calibration curve or chart relating percent concentration to the clock reading. Misreading a clock by one complete revolution (40 clock units) is not unusual.

Scratch-and-dig standard revisited

Matt Young
Appl. Opt. 25(12) 1922-1929 (1986)

Technical Note: Merger of Atomic Instrument Company and Baird Associates, Inc.

J. Opt. Soc. Am. 46(7) 561-561 (1956)

The Aberration of Clocks and the Clock Paradox

Herbert E. Ives
J. Opt. Soc. Am. 27(9) 305-309 (1937)

The Rose model, revisited

Arthur E. Burgess
J. Opt. Soc. Am. A 16(3) 633-646 (1999)

The T-matrix revisited

P. C. Waterman
J. Opt. Soc. Am. A 24(8) 2257-2267 (2007)