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Vibro-Meter VC-920
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Kollmorgen VDE0530-S1
Kollmorgen VDE0530-S1

Vibro-Meter VC-920

Manufacturer:​ Brüel & Kjær Vibro (formerly Vibro-Meter / Schenck)
Product Brief:​ A compact, DIN-rail or panel-mountable single-channel vibration monitor for bearing housing and casing vibration, accepting acceleration or velocity sensor inputs and providing alarm relays, analog output, and buffered dynamic signal.
Category:
Description
Technical Specifications
  • Input Channel:​ 1 dynamic input
    • Acceleration sensor (e.g. AS-022, ASA-022) with 24 V DC / 4 mA constant-current supply (CCS)
    • Velocity sensor (e.g. VS-068, VS-069) passive, no excitation
  • Measured Parameter:​ RMS vibration velocity (mm/s or in/s); range selectable 0–10 / 20 / 50 / 100 mm/s
  • Frequency Range:​ 1 Hz – 1000 Hz (10 Hz – 1000 Hz for some sensor combos); –3 dB points per filter
  • Accuracy:​ ±5 % of reading
  • Alarm Relays:​ 2 × SPDT (Alert & Danger), latching/non-latching selectable, time delay 0–100 s independently adjustable
  • Analog Output:​ 0/4–20 mA (RL < 500 Ω) or 0–10 V DC (RL > 10 kΩ), proportional to measured value
  • Buffered Output:​ Dynamic (AC-coupled) signal available for external analysis
  • OK Supervision:​ Monitors supply voltage, microprocessor, and sensor integrity; separate OK LED and relay
  • Power Supply:​ 115 VAC / 230 VAC (±15%), 50/60 Hz, ~12 VA; OR 18–32 VDC, ~7 W
  • Housing:​ Plastic enclosure, IP20; Dimensions ≈ 150 × 78 × 115 mm (W × H × D); Weight ≈ 0.9–1.0 kg
  • Operating Temp.:​ 0 °C to +50 °C; Storage –10 °C to +70 °C
Features & Applications
  • Software-free setup via DIP switches / potentiometers on front
  • Ideal for standalone bearing vibration protection on fans, pumps, compressors, motors
  • Discontinued (replaced by VC-950/960) but widely in service
Installation & Notes
  • Use shielded cable for sensor; shield grounded at monitor end only
  • Set measurement range and alarm thresholds with power off; verify with known shaker if possible
  • Keep away from direct heat sources; ensure adequate ventilation in enclosed panels
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