Once recording is started, the Fluke 43 looks at every cycle of the current and voltage waveforms . It plots and timestamps the minimum, maximum and average voltage and current during the sample window. In an 8 minute example as discussed above, the Fluke 43 would give you the min. That is, it automatically compresses the trace as the test progresses. After stopping the run, either by pressing hold or allowing the duration to elapse, a cursor helps read out the min, max, average, time and date of points on the trend.
Transient mode is an easy to use single shot mode.
This innovative feature allows the user to specify a tolerance around the normal voltage waveform. Once the user starts the monitoring function, the Fluke 43 takes a quick look at the voltage. If it looks more or less normal, it memorises the waveform and draws a tolerance envelope around it. Anything that goes outside the envelope is stored in one of the 40 memories along with the time and date. The Fluke 43 does not support dB or relative measurements like the Fluke 123.