Test Jig for an Integrating Direct-Reading Spectrograph

Abstract

A Bausch & Lomb dual grating spectrograph was converted to a direct-reading instrument with the use of the readout system employed in the Baird Associates Spectromet, model HA-1. The readout system consisted of four clocks, necessary power supplies, programming, bias amplifier controls for the clocks, sequential relays, and charging capacitors.* Since the spectrograph and the measuring system were not integral parts, it was necessary to increase the length of the coaxial signal leads from the multiplier phototube signal system to the readout system, and rearrange the electronics in the readout console. With these changes made in the geometry of the electronics, it was desirable to test the readout system, prior to ultimate use of the direct-reading instrument in spectrochemical analysis. This test would also aid in the correct setting of the amplifier bias controls, and indicate malfunction of clocks through a comparison of the four clock readings.