EUROPE


Vibration measuring systems

Digital Charge-input Vibrometer (VM-1970)

Covers from 1 Hz up to 1000 Hz
Conversion of the measured value or change of unit are automatic. No need for complicated operations and easy to read indication.
Digital Charge-input Vibrometer (VM-1970)

Features

■ H function is measurable
■ Level alarm function
■ Vibration severity calculation according to ISO-10816 is available.

System Composition

■ AC OUTPUT (±5 V at full scale, load 10 kΩ or higher) Waveform output to oscilloscope, stroboscope and data recorder etc.

■ DC OUTPUT (±5 V at full scale, load 10 kΩ or higher) Vibration lebel output to pen recorder

system composition

Specifications

Item Specification
Input signal Piezoelectric accelerometer
Frequency range Acceleration : 1 Hz to 100 kHz (±3 dB), 3 Hz to 70 kHz (±0.5 dB)
Velocity : 3 Hz to 6 kHz (±0.5 dB)
Displacement : 3 Hz to 600 Hz (±0.5 dB)
Measurement range
(for an accelerometer
of charge sensitivity
1.0–9.99pc / m/s2)
Acceleration 1, 10, 100, 1000, 10000 m/s2  5 range
Velocity 3 Hz to 1, 10, 100, 1000 cm/s    4 range
10 Hz to 1, 10, 100, 1000 cm/s    4 range
30 Hz to 0.1, 1, 10, 100, 1000 cm/s   5 range
Displacement 3 Hz to 1, 10, 100, 1000 mmp-p    4 range
10 Hz to 0.1, 1, 10, 100, 1000 mmp-p 5 range
30 Hz to 0.01, 0.1, 1, 10, 100 mmp-p 5 range 
H function Value of acceleration detected after passing 2 kHz to 15 kHz bandpass filter then
detected and processed by 1 kHz low pass filter. Unit is the same as of acceleration.
Filter response Lower cutoff frequency : Off (1 Hz), 3, 10, 30 Hz
Higher cutoff frequency : 300Hz, 1, 3, 10 k, Off (100 kHz)
Cutoff : -18 dB Butterworth
Indication
  • rms : Mean square value
  • EQP : Equivalent peak estimated from average value
  • PEAK : Peak value
  • P-HOLD : Held max. peak value
Level watching function
  • Alarm level step : 1 Step for every channel
  • Setting : 0 to 110 % for every range
  • Alarm output : 1a Relay contact output / ITTL level output for each individual channel
  • Contact capacity : DC30 V 0.5 A, AC120 V 0.5 A
Output
  • Waveform : voltage 0 to ± 5 V (load 10 kΩ or higher)
  • Level output : voltage 0 to ± 5 V (load 10 kΩ or higher)
  • calibration output : 80 Hz Sine output
Ambient temperature / humidity 0 to +40゚ C / 85 %RH or lower (non-condensing)
Power supply Commercial power supply : AC100 V ±15 % 50 / 60 Hz 20 VA or less
Battery : D size 4 pcs. life 10 hours or longer
External DC power supply : DC9 to 12 V
Size / Mass 200 (W) x 290 (D) x 150 (H) mm (excluding connectors etc.) / Approx. 5 kg

Standard composition

Item Quantity Notes
AC adapter 1 For AC 100 V
AC adapter plug 1 Accessory for AC adapter
Output cable 1 1.5 m
Screw driver 1 Flathead screwdriver
Fuse 2 2 A
Main unit plastic cover 1 -
Instruction manual 2 -

Option

Item Notes
Auxiliary output connector For alarm relay
Conversion transformer For AC adapter