****Limited calibration / calibration limitée *****
See certificate for more information / Voir le certificat de calibration pour plus d'information.
AC/DC Voltage Measure *****

The Megohmmeter Models 6550 and 6555 are high-end portable measuring instruments capable of measuring
very high electrical insulation and resistance values. They are packaged in a rugged case, have a graphical LCD
screen and can operate on battery or AC power.
The Model 6550 makes insulation measurements at voltages up to 10,000V, the Model 6555 up to 15,000V.
Their main functions are:
■ detection and measurement of input voltage, frequency, and current
■ quantitative and qualitative insulation measurement:
- measurement at a fixed test voltage of 500V, 1000V, 2500V, 5000V, 10,000V or 15,000VDC
- measurement at an adjustable test voltage from 40 to 15,000VDC
- measurement with a voltage ramp selectable in the ranges from 40 to 1100V or from 500 to 15,000V
- measurement with a voltage in steps from 40 to 15,000V with up to 10 steps and dwell times
- non-destructive (Early Break) test, test stopped at a preset current (Break at I-limit) or Burning
- calculation of the DAR, PI, and DD (dielectric discharge index) quality ratios
- calculation of the temperature corrected resistance
■ measurement of the capacitance of the circuit tested
■ measurement of the residual current