AMETEK CTS 3.0 - Manual (Page 74)

Compliance Test System 3.0 User Manual
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5.4 Stationary or Transitory Harmonics Test
The older IEC 61000-3-2:1998 standard distinguished between two types of tests, stationary for
equipment that exhibits constant power consumption and transitory for equipment that exhibits
fluctuating power consumption patterns.
Under the revised 2004 test standards, all tests are done by evaluating transitory harmonics so
this selection is not longer relevant. Evaluation of current harmonics is always done using the
transitory method so no user selection is provided. See section 2.3.3 for details on selecting the
correct test time.
It should be noted that the user must ensure that the total test time applied is sufficient to cover a
complete operating cycle of the EUT. Many devices are stationary in nature but notable
exceptions exist. For example, a laser printer that periodically draws higher currents to heat the
fuser may exhibit fluctuating harmonics and may require a test time that is sufficiently long to
cover such an event. The same applies to microwave cookers and washing machines.