Yes, I saw the docs, but still found them a bit confusing.
I have, through a bit of experimenting, found these numbers to work on a VISZO 60" model E550i-B2.
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Trigger Watts: 2.0
Threshold Watts: 1.5
Delay Seconds: 10.05
If I am understanding the settings correctly (please correct me if I am wrong), assuming an OFF state of the TV, the Trigger Watts is what the TV needs to draw to be seen as ON. The Threshold Watts is the the level is what the watt drawn needs to return on, after being ON, before the TV will turn OFF. The Delays Seconds is to enforce a quiet period between triggers (ON or OFF) so that false triggering doesn't happen. The Delay Seconds is important as a "fade to black" scene in a movie rarely lasts for more than 5 seconds, so the 10 (10.05) seconds is more than enough to prevent false triggering.
So, in my case above, my TV, when OFF, can draw up to, be not including, 2 watts before it turns ON. Then, when ON, the TV's power must drop below 1.5 watts for 10.05 seconds before sending an OFF signal.
Did I get this right?
Since most power bricks seem to draw about 1W when the unit is off, that's where I guessed at my settings. So far, they seem to be working well.
Oh, and I think you're right, an iMeter would have been a better module to work with. Lesson learned