Reply to "RMS Multi Meter Recommendations..."

gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

@Bruce Brown posted:
Too much is being made of the need for a true-RMS meter for model train applications. As @SteveH points out, a True RMS meter is not needed for sinusoidal waveform work. @Dennis-LaRock is concerned about measurements in the 18 VAC range. At 18 VAC, all transformers and controllers--including chopped waveform ones--are producing a near pure sine wave!!!

Well... not really!

Z1000 full throttle waveform

Lionel ZW-C full throttle waveform

Lionel CW-80 full throttle waveform

And the winner is:

MTH Z4000 full throttle waveform

The TIU is interesting when fed with a pure sine wave. Open PDF to see full report.

TIU Fixed & Variable Waveforms.pdf

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1/22/233:39 PM

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Z1000 full throttle waveform

Lionel ZW-C full throttle waveform

Lionel CW-80 full throttle waveform

MTH Z4000 full throttle waveform

TIU Fixed & Variable Waveforms.pdf

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