Hi All,
I've just had one of these $69.95 L7663 meters delivered from Planet Earth Solar.
I've just been trying it with combinations of 60W desk lamps and 7W (nominal) nightlights.
The 60W desklamp measures at 58W, the same as measured by the Jaycar meter. Adding a single nightlight boosts the meter reading to 62W.
The nightlight by itself or the meter with no load at all often reads
0W or 2W and this is also with or without the nightlight illuminated. So, this meter is a bit dodgy with lower powers too, as was the Jaycar meter.Measurements:
1X60W bulb = 58W1X60W bulb + 1Xnightlight = 62W
1X60W bulb + 2Xnightlight = 66W2X nightlights = 8W
1X nightlight = 0W or 2WNo-load = 0W or 2W.
Ross