Question

In vibrating condenser amplifier type pH meter, to maintain good performance which of the following has to be done?

(a) Frequency of the vibrator should be stable

(b) Frequency of the vibrator should be constant

(c) Amplitude of the vibrator should be constant

(d) Both frequency and amplitude of the vibrator should be constant and stable

I got this question during an interview.

I would like to ask this question from pH Meters in section pH Meters and Ion Analysers of Analytical Instrumentation

Answer 1

The correct answer is (d) Both frequency and amplitude of the vibrator should be constant and stable

Easy explanation: In vibrating condenser amplifier type pH meter, to maintain good performance, both frequency and amplitude of the vibrator should be constant and stable.