Sample Calculation, Buffered Output; Derivation Of Integrated Signal Voltage - GE Bently Nevada 3300/25 Operation Manual

3300/25 Dual Accelerometer Input Monitor Operation Manual
21.2.1

Sample Calculation, Buffered Output

Monitor is configured as: BB or CC option 16 (50 mm/sec (peak))
Input vibration level is: 1g (peak)
Input signal frequency is: 100 Hz = 6000 CPM
Transducer scale factor is: 100 mV/g
Step 1. Calculate transducer output voltage.
Vib = 1g (peak)
SF = 100 mV/g
Step 2.
The signal at the buffered output is 0.3091 V (peak) or equivalently 0.2186 V (RMS).
21.2.2

Derivation of Integrated Signal Voltage

The transfer function of the integrator and the gain block is:
Z
f
( Y ) S = × 4
Z
i
Where:
Z is the feedback impedance:
f
Z is the input impedance:
i
S = × i ω = × i 2 × π ×
138
1 ( g peak × )
0 1 . × 29
Vout =
(. 009097 ×
R ×
f
Z =
f
R +
f
Z = R
I I
F
0 1 . = 0 1 . V = Vsig
V
g
. 645
= . 0 3091
2
100 + ) 1
1
SC
f
1
SC
f
V ( peak )