Measure and record the following:

 

  • Rectifier Input voltages & currents.
  • Inverter Output voltages & currents.
  • Bypass Input voltages & currents.
  • System Output (Critical Buss) voltages & currents.
  • Rectifier Output voltages and currents.
  • Delta voltages (difference between Bypass & Inverter Output).
  • Bypass and Inverter frequency.
  • ¬†Compare front panel meter readings with above measurements and verify 3% accuracy.
  • Check alarm / status indicators and remote status panel, note any deficiencies.
  • Inspect air filters and replace if necessary.
  • Check all fans for free and quiet rotation.
  • Visually inspect UPS interior.¬†
  • Provide one copy of recorded data.