L7663 Power Useage meter

R

RMD

Guest
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 = 58W

1X60W bulb + 1Xnightlight = 62W

1X60W bulb + 2Xnightlight = 66W

2X nightlights = 8W

1X nightlight = 0W or 2W

No-load = 0W or 2W.

Ross
 
"RMD"

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 = 58W

1X60W bulb + 1Xnightlight = 62W

1X60W bulb + 2Xnightlight = 66W

2X nightlights = 8W

1X nightlight = 0W or 2W

No-load = 0W or 2W.
Click to expand...

** If all you wanted to do was measure resistive loads like lamps - then
use you damn DMM on AC current !!





....... Phil
 
On Thu, 3 Jul 2008 12:53:46 +1000, "Phil Allison"
<philallison@tpg.com.au> wrote:

"RMD"

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 = 58W

1X60W bulb + 1Xnightlight = 62W

1X60W bulb + 2Xnightlight = 66W

2X nightlights = 8W

1X nightlight = 0W or 2W

No-load = 0W or 2W.


** If all you wanted to do was measure resistive loads like lamps - then
use you damn DMM on AC current !!





...... Phil
Click to expand...
Phil,

I'm testing it with bulbs.

If it works with bulbs then I'm prepared to believe it might work with
inductive small loads like plugpacks or other similar loads such as
standby power on electronic equipment

Ross
 
"RMD"

** If all you wanted to do was measure resistive loads like lamps - then
use you damn DMM on AC current !!


I'm testing it with bulbs.

If it works with bulbs then I'm prepared to believe it might work with
inductive small loads like plugpacks or other similar loads such as
standby power on electronic equipment
Click to expand...

** Then you are EXACTLY the colossal, fucking IDIOT I suspected !!!

Have you not read a SINGLE word posted here on the matter ??

Still got NO idea what VA means as compared to watts ??

Still got NO idea how a true power meter must operate ???

Obviously not.


For fuck's sake, get yourself a 1uF mains cap and test it with that - the
reading should not vary from no load.

If you want see what the standby power of ALL your appliances is - then put
the WHOLE LOT on the same circuit and measure the total !!

You crappy meter might just be able to do that.



....... Phil
 
On Jul 3, 12:47 pm, ebff_q...@lnubb.pbz (RMD) wrote:
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 = 58W

1X60W bulb + 1Xnightlight = 62W

1X60W bulb + 2Xnightlight = 66W

2X nightlights = 8W

1X nightlight = 0W or 2W

No-load = 0W or 2W.

Ross
Click to expand...
Is the resolution of this meter only 1W?
If it is that's disappointing.

Dave.
 
On Thu, 03 Jul 2008 02:47:51 GMT, ebff_qnyl@lnubb.pbz (RMD) wrote:

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 = 58W

1X60W bulb + 1Xnightlight = 62W

1X60W bulb + 2Xnightlight = 66W

2X nightlights = 8W

1X nightlight = 0W or 2W

No-load = 0W or 2W.

Ross
Click to expand...
Hi All,

The power meter seems to have stabilised after being left plugged in
overnight.

It now consistently reads 2W without anything being plugged into it.
Previously it was switching between 0W and 2W. It also claims that
0.05A is flowing with nothing plugged in to the power meter.

So there is a zero error. Pulling it apart there seem to be no
adjustments like the Jaycar meter has.

It is now reading 6W consistently when I plug in a 6W (nominal)
nightlight by itself. The nightlight also adds 4W to the reading if a
60 watt lamp is already plugged in.

I tried it with a VCR switching it from standby to play, and it went
from 4W standby power to about 10W play power. (Subtracting the 2W
zeroing error.)

Trying it with a 60W bulb plugged in as well as the VCR gave much the
same result for the VCR standby/play power.

Ross
 
On Thu, 3 Jul 2008 18:35:09 -0700 (PDT), "David L. Jones"
<altzone@gmail.com> wrote:

<<<snipped>>>>

Is the resolution of this meter only 1W?
If it is that's disappointing.
Click to expand...
Yes, the meter reads only to the nearest watt.

Ross
 
On Jul 4, 2:02 pm, ebff_q...@lnubb.pbz (RMD) wrote:
On Thu, 3 Jul 2008 18:35:09 -0700 (PDT), "David L. Jones"

altz...@gmail.com> wrote:

snipped

Is the resolution of this meter only 1W?
If it is that's disappointing.

Yes, the meter reads only to the nearest watt.
Click to expand...
Bugger.

So is the SC power meter kit the only decent low cost high resolution
power meter available in Oz I wonder?

Dave.
 
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