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Digital displacement meter unit
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LV-0121A

The LV-0121A digital displacement meter unit, when connected to the LV-1800 Laser Doppler Vibrometer, can detect vibration displacement values (m) from DC with a maximum sampling rate of 1 MHz and a high resolution of 0.155 nm.

Displacement values are output in both analog and digital formats, and by using the dedicated displacement analysis software LV-0930, a variety of vibration analyses are possible, including conversion to velocity (m/s) and acceleration (m/s²).

*When connecting the LV-0121A digital displacement meter unit to the LV-1800 Laser Doppler Vibrometer, the connection set "LV-0041" is required.

Features

  • High resolution 0.155 nm (digital output)
  • 1 MHz high-speed sampling
  • Digital displacement output (USB 2.0)
  • Analog output DC to 100 kHz

* Compatible Laser Doppler Vibrometer LV-1710/LV-1720 * /LV-1720A/LV-1800
*The LV-1720 requires pickup and modification.

Case Studies

  • Measurement of minute displacements in MEMS and piezoelectric elements

  • Displacement measurement of extremely low-frequency vibrations

  • Displacement measurement of piezoelectric elements and films driven by rectangular waves

  • Displacement measurement of air cylinders and actuators

  • Displacement and vibration measurement of relays and cantilevers

System Configurations

  • System Configurations

Specification

Analog output
Analog output
±10V (with input impedance of 100 kΩ or higher)
Cutoff frequency
DC: DC to 100 kHz (fc = −3 dB)
AC: 0.3 Hz to 100 kHz (fc = −3 dB)
linearity
±0.1%/FS (Temperature coefficient: ±0.025%/FS/°C)
Analog Ripple
2 mVp-p or less
Output Impedance
50 Ω (Minimum input impedance 100 kΩ or higher)
Output terminals
BNC (CO2 type)
Analog displacement range
Maximum measurement speed
2.5 m/s (all ranges)
Range display
The selected range is displayed on a 7-segment LED.
Setting range
range Maximum measurement range Analog minimum resolution Digital resolution
0.1 μm/V ±1 μm 0.15 nm 0.155 nm
1 μm/V ±10 μm 0.3 nm
5 μm/V ±50 μm 1.5 nm
10 μm/V ±100 μm 3 nm
100 μm/V ±1 mm 30 nm
2 mm/V ±20 mm 618 nm
0.1 m/v ±1.0 m 30 μm
0.5 m/v ±5.0 m 154 μm
1 m/V ±10 m 309 μm
Range over display
Red LED lights up when each range is above 100%.
Reset display
Green LED lights up when displacement zero reset operation/input is performed.
Sampling Frequency
Analog output: Fixed at 1 MHz
Digital output: Adjustable using displacement analysis software (LV-0930).
(1 MHz, 500 kHz, 200 kHz, 100 kHz, 50 kHz, 20 kHz, 10 kHz, 5 kHz, 2 kHz, 1 kHz, 500 Hz, 200 Hz, 100 Hz, 50 Hz, 20 Hz, 10 Hz, 5 Hz, 2 Hz, 1 Hz, 0.5 Hz)
Digital output
USB Ver. 2.0 (Full Speed)
Connector type: Mini B type
EXT signal input
Displacement zero reset signal input / TRIG signal input
Connector type: R03-R5F
  • External reset signal: RESET operation when a voltage-free normally open (a) contact signal is input/closed.
  • TRIG signal: TTL (+5 V signal) *Available when using LV-0930
Pin assignment
A External reset signal input
B External reset signal COM
C TRIG signal input
D TRIG signal COM
E --
SYNCHRONOUS signal input/output
Synchronization connector (when connecting two units)
  • RESET signal
  • CLK signal
  • TRIG signal
DOPPLER signal
Laser Doppler Vibrometer LV-1700 * / For connection to LV-1800 series
REF signal
Laser Doppler Vibrometer LV-1700 * / For connection to LV-1800 series
Input voltage
DC 9-18V
Power connector
DC jack (EIAJ TYPE 5): Outer side - electrode, Inner side + electrode
Power consumption
Approximately 10 VA (AC adapter SQ45W15P-00 * (when used)
Operating temperature range
5-40℃
Storage temperature range
-10 to +50°C
Outline drawings
58 (W) x 222 (D) x 135 (H) mm
Option
  • LV-0930 Displacement Analysis Software
  • LV-0040 LV-1710 * /LV-1720A * Connection set
    (Includes: REF cable, STD-1533PA AC adapter, AC cable, MX-101 cable, USB cable)
  • LV-0041 Connection Set for LV-1800
    (Includes: STD-1533PA AC adapter, AC cable, MX-101 cable x 2, USB cable)

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Outline Drawings

Instruction Manual

最終更新日:2022/02/01