Measure low power consumption

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Measure low power consumption

by mechanic » 13/02/21, 05:35

Hello,
I have the old PM230 which measures poorly low consumption. For the latter, do you have a device to recommend to me?
It seems the PM231 is doing little better ...
Have a good day
M
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Forhorse
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Re: measure the low power consumption

by Forhorse » 13/02/21, 07:58

What is a low consumption for you?
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Re: measure the low power consumption

by plasmanu » 13/02/21, 08:10

Surely a device like that
ar-energiemetre-pm230-e-13156.jpg
ar-energiemetre-pm230-e-13156.jpg (8.95 KiB) Viewed 512 times

A "PM230 / E energy meter"
This is to measure the consumption on a socket and see the standby consumption for example.
I had one to measure the injection of a wind turbine inverter.
The problem is, it's unidirectional.
It measures what comes out of the socket.
To measure what goes into the socket you have to tweak the welds
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Re: measure the low power consumption

by mechanic » 13/02/21, 08:37

Forhorse wrote:What is a low consumption for you?

It's not for me, it's for the device. He said to himself here that for the PM230, it was for a power less than 5 W
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Re: measure the low power consumption

by mechanic » 13/02/21, 08:39

plasmanu wrote:Surely a device like that
ar-energiemetre-pm230-e-13156.jpg
A "PM230 / E energy meter"
This is to measure the consumption on a socket and see the standby consumption for example.
I had one to measure the injection of a wind turbine inverter.
The problem is, it's unidirectional.
It measures what comes out of the socket.
To measure what goes into the socket you have to tweak the welds

yes I have the PM230 as said above
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Re: measure the low power consumption

by plasmanu » 13/02/21, 09:15

"This energy meter allows you to measure the consumption of your electrical devices. Possibility of introducing 2 tariffs for day and night consumption or the two-hourly tariff. The displayed values ​​are: current, real power, power factor, power in line, line voltage, frequency, total cost, service life. With child protection. Suitable for indoor use only. "

Features:
Power supply: 230 Vac
Consumption: <0,5 W
Voltage measurement range: 230 Vac (190 to 276 Vac)
Current measurement range: 0,01 to 16 A
Max power: 3600 W / 16A
Accuracy: ± 1% or ± 0,2 W
Display: 0 to 9999,9 kWh
Maximum recordable time: 9999 h 59 m
Data backup: 3 LR44 batteries included
Serving temperature: 10 ° C to 40 ° C
Dimensions: x 138 62 43 mm x
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Re: measure the low power consumption

by Forhorse » 13/02/21, 09:17

0.01A at 230V is 2.3VA
So my question remains the same: what is low consumption for you?
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Re: measure the low power consumption

by plasmanu » 13/02/21, 10:02

It measures well from 0 but does not give the comma for W.
For my EMT707CTL 16A / 230V anyway.
Three laptop chargers (5V 2A) give zero W or VA.
One of connected to a Lithium ion charger in maintenance displays 1W.
But it's no more precise to fine-tune to the nearest 0,1
IMG_20210213_095021.jpg

IMG_20210213_094853_1.jpg
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Re: Measure low power consumption

by Petrus » 13/02/21, 18:33

I have a "Tevion" brand plug which measures from 0,5W with a number after the comma:
Tevion_W.jpg
Tevion_W.jpg (147.27 KiB) Viewed 425 times

Tevion_2.jpg
Tevion_2.jpg (152.96 KiB) Viewed 425 times

It was originally equipped with a German plug, I modified it with a French plug and adding a cable.
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Re: Measure low power consumption

by izentrop » 13/02/21, 21:13

A 10 A, 2300 W model measures from 0,23 W https://www.elektro-material.ch/fr/shop ... va-1262886
MUST this to measure current laptop power supplies.
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