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 vibra-
tion frequency, 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
Charge sensitivity
6 40 0.15 7 0.7
(pC/(m/s
2
) )
Mounting resonance
24 9 70 25 30*
2
frequency (kHz) *
1
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 specified screws at specified 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 0.3000
Vibration frequency range DC to 100 Hz DC to 100 Hz
Temperature range (°C) -20 to +60 -20 to +60
Mass (g) 220 125
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