Question

Which of the following is the chopping frequency used for medical applications in simple infrared analyser for gas analysis?

(a) 2-10 Hz

(b) 2-50 Hz

(c) 2-100 Hz

(d) 2-150 Hz

The question was posed to me in semester exam.

I'd like to ask this question from Infrared Gas Analysers in portion Industrial Gas Analysers of Analytical Instrumentation

Answer 1

Correct choice is (b) 2-50 Hz

Explanation: The chopping frequency used for medical applications in simple infrared analyser for gas analysis is 2-50 Hz. The chopper is motor driven.