As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Can anyone recommend a make ?.
On 14/12/2024 22:25, Andrew wrote:
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running close to being flat and needs replacing?
On 15/12/2024 10:32, alan_m wrote:
On 14/12/2024 22:25, Andrew wrote:There are two 357/303 button cells but they only maintain
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running close
to being flat and needs replacing?
settings and stored data. It works fine without them and
reads 218V with or without them.
My desktop pc and all its related stuff is powered
through it and I am primarily interested in the Watts
display but if the mains voltage is under-reading
significantly, how do I trust the power consumption ?.
On 16/12/2024 14:21, Andrew wrote:
On 15/12/2024 10:32, alan_m wrote:well 218V rms is within spec. Maybv the waveform is odd.
On 14/12/2024 22:25, Andrew wrote:There are two 357/303 button cells but they only maintain
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running close
to being flat and needs replacing?
settings and stored data. It works fine without them and
reads 218V with or without them.
On 16/12/2024 16:23, Andy Bennett wrote:
On 16/12/2024 14:23, The Natural Philosopher wrote:
On 16/12/2024 14:21, Andrew wrote:
On 15/12/2024 10:32, alan_m wrote:well 218V rms is within spec. Maybv the waveform is odd.
On 14/12/2024 22:25, Andrew wrote:There are two 357/303 button cells but they only maintain
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running
close to being flat and needs replacing?
settings and stored data. It works fine without them and
reads 218V with or without them.
If the rms is calculated correctly the waveform form factor is
irrelevant.
IF.
How many meters just adjust a rectified average?
On 16/12/2024 14:23, The Natural Philosopher wrote:
On 16/12/2024 14:21, Andrew wrote:
On 15/12/2024 10:32, alan_m wrote:well 218V rms is within spec. Maybv the waveform is odd.
On 14/12/2024 22:25, Andrew wrote:There are two 357/303 button cells but they only maintain
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running
close to being flat and needs replacing?
settings and stored data. It works fine without them and
reads 218V with or without them.
If the rms is calculated correctly the waveform form factor is irrelevant.
On 16/12/2024 16:41, The Natural Philosopher wrote:
How many meters just adjust a rectified average?
Well power meters certainly should not, particularly when they also
calculate the reactive power.
On 16/12/2024 16:41, The Natural Philosopher wrote:
On 16/12/2024 16:23, Andy Bennett wrote:
On 16/12/2024 14:23, The Natural Philosopher wrote:
On 16/12/2024 14:21, Andrew wrote:
On 15/12/2024 10:32, alan_m wrote:well 218V rms is within spec. Maybv the waveform is odd.
On 14/12/2024 22:25, Andrew wrote:There are two 357/303 button cells but they only maintain
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running close to being flat and needs replacing?
settings and stored data. It works fine without them and
reads 218V with or without them.
If the rms is calculated correctly the waveform form factor is irrelevant. >>>
IF.
How many meters just adjust a rectified average?
Well power meters certainly should not, particularly when they also calculate the reactive power.
On Mon, 12/16/2024 11:45 AM, Andy Bennett wrote:
On 16/12/2024 16:41, The Natural Philosopher wrote:
On 16/12/2024 16:23, Andy Bennett wrote:
On 16/12/2024 14:23, The Natural Philosopher wrote:
On 16/12/2024 14:21, Andrew wrote:
On 15/12/2024 10:32, alan_m wrote:well 218V rms is within spec. Maybv the waveform is odd.
On 14/12/2024 22:25, Andrew wrote:There are two 357/303 button cells but they only maintain
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running close to being flat and needs replacing?
settings and stored data. It works fine without them and
reads 218V with or without them.
If the rms is calculated correctly the waveform form factor is irrelevant. >>>>
IF.
How many meters just adjust a rectified average?
Well power meters certainly should not, particularly when they also calculate the reactive power.
See if you can get a part number off the main chip.
If it uses the modern design, the meter is very similar
to a smart meter. Two sigma-delta converters running at
500KHz or so, making a very accurate drawing of the
voltage and current waveforms. The CPU inside the chip,
does maths to determine PF, W, VA, V, I and so on.
It's capable of measuring lower power factors quite well.
Your regular multimeters cannot make a lot of sense out
of the mains idle power (+5VSB portion) of an ATX supply. The Kill-O-Watt designs can determine that the W and VA are quite different
values at idle.
0.7 W \
5.7 VA \___ PC in soft-off-state, push front button to start.
0.12 PF / Seasonic 620 Bronze
When measuring an incandescent light bulb, the PF should be
close to 1.0 . The light bulb power is double when the lamp
is cold, but in a few seconds it should settle to the nominal
value.
There are a few checks you can do like this, to determine
whether it is a modern design, or it is... something else.
Paul
Andrew wrote:
I bought it over 20 years ago when Tchibo (Tchaibo?) had high
street shops in the UK
The only time I heard of them was when they seemed to occupy a few
feet of shelf-space within Sainsburys.
On 16/12/2024 17:55, Paul wrote:
On Mon, 12/16/2024 11:45 AM, Andy Bennett wrote:
On 16/12/2024 16:41, The Natural Philosopher wrote:
On 16/12/2024 16:23, Andy Bennett wrote:
On 16/12/2024 14:23, The Natural Philosopher wrote:
On 16/12/2024 14:21, Andrew wrote:
On 15/12/2024 10:32, alan_m wrote:well 218V rms is within spec. Maybv the waveform is odd.
On 14/12/2024 22:25, Andrew wrote:There are two 357/303 button cells but they only maintain settings >>>>>> and stored data. It works fine without them and reads 218V with or >>>>>> without them.
As per subject, my DVM reads 238 volts and I have noticed the >>>>>>>> Tchaibo? device reading low on mains volts for a while so its >>>>>>>> time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just a plugin >>>>>>>> device with its own lcd screen that measures and shows Volts, >>>>>>>> watts and perhaps stores values over a time period and keeps its >>>>>>>> data even when mains is disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running >>>>>>> close to being flat and needs replacing?
If the rms is calculated correctly the waveform form factor is
irrelevant.
IF.
How many meters just adjust a rectified average?
Well power meters certainly should not, particularly when they also
calculate the reactive power.
See if you can get a part number off the main chip.
If it uses the modern design, the meter is very similar to a smart
meter. Two sigma-delta converters running at 500KHz or so, making a
very accurate drawing of the voltage and current waveforms. The CPU
inside the chip, does maths to determine PF, W, VA, V, I and so on.
It's capable of measuring lower power factors quite well. Your regular multimeters cannot make a lot of sense out of the mains idle power
(+5VSB portion) of an ATX supply. The Kill-O-Watt designs can determine that the W and VA are quite different values at idle.
0.7 W \ 5.7 VA \___ PC in soft-off-state, push front button
to start. 0.12 PF / Seasonic 620 Bronze
When measuring an incandescent light bulb, the PF should be close to
1.0 . The light bulb power is double when the lamp is cold, but in a
few seconds it should settle to the nominal value.
There are a few checks you can do like this, to determine whether it is
a modern design, or it is... something else.
Paul
I bought it over 20 years ago when Tchibo (Tchaibo?) had high street
shops in the UK. Also branded TCM I think.
QED Not a modern design and I think the mains voltage value on display
has slowly dropped on the last 10 years or so.
I'll just get a 'modern' one.
I bought it over 20 years ago when Tchibo (Tchaibo?) had high
street shops in the UK
On Mon, 16 Dec 2024 18:45:23 +0000
Andy Burns <usenet@andyburns.uk> wrote:
Andrew wrote:
I bought it over 20 years ago when Tchibo (Tchaibo?) had high
street shops in the UK
The only time I heard of them was when they seemed to occupy a few
feet of shelf-space within Sainsburys.
There was one in Romford for a few years. A really odd shop, impossible
to categorise.
On 16/12/2024 18:52, Joe wrote:
On Mon, 16 Dec 2024 18:45:23 +0000Indeed, that sort of sums up the layout of the one that
Andy Burns <usenet@andyburns.uk> wrote:
Andrew wrote:
I bought it over 20 years ago when Tchibo (Tchaibo?) had high
street shops in the UK
The only time I heard of them was when they seemed to occupy a few
feet of shelf-space within Sainsburys.
There was one in Romford for a few years. A really odd shop, impossible
to categorise.
was in Swan Walk, Horsham.
Andrew wrote:
Can anyone recommend a make ?.
I haven't had any problems with the type which Maplin used to sell,
I think it was a re-badged ProDIGIT 2000MU-UK (aka 2000MU-01)
<https://www.prodigit.com/2000ms12-8-in-1-plug-in-power- monitor.html#overview_tab>
On 15/12/2024 10:32, alan_m wrote:
On 14/12/2024 22:25, Andrew wrote:There are two 357/303 button cells but they only maintain
As per subject, my DVM reads 238 volts and I have noticed the
Tchaibo? device reading low on mains volts for a while so
its time for a new one.
Can anyone recommend a make ?.
I just something fairly simple. No need for a bluetooth
interface or anything that involves a smartphone, just
a plugin device with its own lcd screen that measures
and shows Volts, watts and perhaps stores values over a
time period and keeps its data even when mains is
disconnected.
Andrew
Does you Tchaibo have an internal battery? If so is it running close
to being flat and needs replacing?
settings and stored data. It works fine without them and
reads 218V with or without them.
My desktop pc and all its related stuff is powered
through it and I am primarily interested in the Watts
display but if the mains voltage is under-reading
significantly, how do I trust the power consumption ?.
On 15/12/2024 10:38, Andy Burns wrote:
Andrew wrote:
Can anyone recommend a make ?.
I haven't had any problems with the type which Maplin used to sell,
I think it was a re-badged ProDIGIT 2000MU-UK (aka 2000MU-01)
<https://www.prodigit.com/2000ms12-8-in-1-plug-in-power-
monitor.html#overview_tab>
I have 3 of those, bought from Maplin many years ago.
They aren't working as well as they did. They're taking a noticable 1 or
2 seconds to come out of reset when powered up, and taking a second or
three to reflect a change in power consumption sometimes.
I haven't got around to looking inside, but maybe a capacitor or two has
gone out of spec?
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