Simpson 228 – AC/DC Leakage Current Tester

The Simpson Model 228 is a special purpose AC/DC milliammeter that measures potentially hazardous leakage current on electrical and electronic equipment. This instrument has been designed around IEC 60950, “Information technology equipment – Safety” and EN 61010-1, “Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use.

The Model 228 tests equipment operating at 120-220 volts AC or DC power line circuits only. Instrument features include:

• Separate leakage current networks for measuring the following electrical shock response levels:
  • Perception/reaction (shock hazard)
  • Let-go (shock hazard)
  • Burn hazard
• 0-300 volt scale for measuring the open-circuit voltage between accessible parts and ground.
• An RMS reading meter with scales that read shock hazard up to 10 Measurement Indication Units (MIU), burn hazard up to 100 mA and peak indicating RMS shock hazard. (Refer to Section 7, Measurement Procedures) for more information.
• Output connections for an external peak reading Instrument (required for measuring peak readings on non-sinusoidal waveforms).
• Convenient battery test function

The 228 is battery operated. In some applications, the lead attached to the “Ground” input may not be attached to earth ground. As a result, the output jacks may be “floating.” To prevent a shock hazard, do not connect any connectors or equipment with accessible conductive surfaces.

• True RMS Readings
• Reads in Measurement Indication Units (MIU) up to .005 MIU
• Output Allows Measurement of Peak Current in Non-Sinusoidal Wave Forms
• Let-Go, Reaction, and Burn Hazard Response Networks
• Burn Hazard Network
• Incorporates 3-Special Networks Required by Guidelines

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