Rion VM-83, Инструкция по эксплуатации, Страница: 24 / 106

14
Preparations
Selecting an accelerometer
The VM-83 can use piezoelectric accelerometer or servo accelerometer. Select
the type of accelerometer according to the intended measurement range, vi-
bration frequency range, environmental conditions, and other related factors.
- Some major piezoelectric accelerometers made by Rion (representative
values)
General High-output Light weight Heat-resistant 3-axis
Model PV-85 PV-87 PV-90B PV-65 PV-93
Cha rge sensitivit y
(pC/(m/s 2 ) )
6 40 0.15 7 0.7
Mounting resonance
frequency (kHz) * 1
24 9 70 25 30* 2
Vibration frequency
range (Hz)
1 to 7000 1 to 3000 1 to 25000 1 to 9000 1 to 8000* 2
Temperature range
(°C)
-50 to +160 -50 to +160 -50 to +160 -50 to +260 -50 to +160
Mass (g) 23 115 1.2 26 28
Construction principle Shear type Shear type Shear type Shear type Shear type
*1 When mounted with specifi ed screws at specifi ed torque
*2 Vertical direction value
- Servo accelerometer
The servo accelerometer model that can be used with the VM-83 is
the LS-10C or LS-20C.
Model LS-10C LS-20C
Voltage sensitivity (V/[m/s 2 ]) 0.300 0.300
Vibration frequency range DC to 100 Hz DC to 100 Hz
Temperature range (°C) -20 to +60 -20 to +60
Mass (g) 220 125