INFICON RQCM - Quartz Crystal Microbalance Research System - Manual (Page 63)

RQCM – RESEARCH QUARTZ CRYSTAL MICROBALANCE
THEORY OF OPERATION 5-11
Figure 18 Admittance vs. Frequency, Magnitude and Phase of High Q Crystal
Figure 19 Admittance vs. Frequency, Real and Imaginary Components of High Q Crystal
PHASE
MAGNITUDE
100
120
140
80
60
40
20
0
MAGNITUDE
X10 -3 SIEMENS
PHASE
DEG
90
60
30
0
−30
−60
−90
(REAL)
CONDUCTANCE
X10 -3 SIEMENS
(IMAGINARY)
SUSCEPTANCE
X10 -3 SIEMENS
140
120
100
80
60
40
20
0
60
40
20
0
-20
-40
-60
IMAGINARY
REAL
≈ 38Hz
20Hz
≈ 38Hz
45
−45
BANDWIDTH
BANDWIDTH
PEAK
IMAGINE
CURRENT