User Manual

LDT with Crimps Vibration Sensor/Switch
LDT0-028K Piezo Vibration Rev 1 www.meas-spec.com 10/13/2008
3 of 4
examples of Properties (continued)
TABLE
2
: LDT0 as Flexible Switch (see Fig 2)
Tip Deflection Charge Output o/c Voltage Output
2 mm 3.4 nC 7 V
5 mm 7.2 nC 15 V
10 mm 10 - 12 nC 20 - 25 V
max (90Ε)
> 30 nC > 70 V
Experiment #3
LDT0 Electrical Frequency Response -
when the source capacitance of around 480 pF is
connected to a resistive input load, a high-pass
filter characteristic results. Using an electronic
noise source to generate broad-band signals, the
effect of various load resistances was measured
and the -3 dB point of the R-C filter determined
(see Table 3, Fig. 3).
TABLE
3
: LDT0 Electrical Frequency Response
(see Fig 3)
(480 pF source capacitance)
Load Resistance -3 db Frequency
1 Megohm 330 Hz
10 Megohm 33 Hz
100 Megohm 3.3 Hz