Experimental Investigation of Factors Influencing Operating Rotor Tip Clearance in Multistage Compressors

Table 2

Capacitance probe measurement system specifications.

Parameter	Value
Operating frequency	2 MHz nominal
Oscillator sensitivity	100 kHz per pF
Demodulator sensitivity	500 mV per kHz typical
Measurement range	5 mm calibrated
System resolution	<0.001 mm (at 0.7 mm clearance)
Signal-to-noise ratio	30–50 typical