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Electric heaters. How can you check whether they are operational and what power they have?

uki4 39703 9
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  • #1 3208468
    uki4
    Level 17  
    Hello,

    How can you check electric heaters to see if they are working and what power they have?
    I have an ordinary token, but I don't know which value to check it with.

    Regards
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  • #2 3208597
    krzychol66
    Level 25  
    They should have no gaps and no penetration into the housing. The attached "for a while" should warm up.
    You can determine the power very roughly by boiling a liter of water "on time".
    You cannot determine the power resistance by measuring it due to its dependence on temperature.
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  • #3 3208808
    dasko
    Level 20  
    You can measure power by measuring the current flowing through the heater.
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  • #4 3209217
    lukiiiii
    Level 29  
    and in order not to mess with connecting an ammeter in series, turn off everything in the house, connect the heater and measure the time it takes for the meter to make 3 revolutions, find on the meter's plate how many revolutions it takes to equal 1 KWh, i.e. 1000W consumed in an hour, a little math and you will know how much it consumes In the heater
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  • #5 3209349
    uki4
    Level 17  
    This heater is like a clamp, probably from an extruder, and I want to install one on a pipe, and once an electrician checked the power of the heater and said 1200W, but I don't remember how he checked it with this meter.
  • #6 3209395
    lechm56
    Moderator  
    Set the maximum value of the alternating current (A) and connect it in series with the heater. Then set the voltage value (V) and connect it in parallel with the heater.
    P (power) = I (current) x V (voltage).
  • #7 3211967
    goldwinger
    VIP Meritorious for electroda.pl  
    the problem will arise if you have a cheaper meter because these crappy ones do not have the option of measuring alternating current
  • #8 3212991
    _jta_
    Electronics specialist  
    You can measure the resistance - although it is measured when cold, and when the heater heats up, it is slightly different,
    slightly larger, but this is not a big difference for heaters - about 5%, for some even less.
    Then you calculate the power using the formula P=U^2/R, U=230V, R is the measured resistance, and subtract a few%.
    Be careful with contact when measuring - usually the contacts are corroded and do not connect at low voltage,
    they need to be rubbed with sandpaper or a file, otherwise they may look burnt.
  • #9 3218717
    dasko
    Level 20  
    Unless you have a clamp meter, you can measure the current without connecting an ammeter in series.
  • #10 3218754
    asterix17td
    Level 17  
    Well, my friend wrote: I have an ordinary property
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Topic summary

To check if electric heaters are operational and determine their power, several methods can be employed. Users can measure the current flowing through the heater or use a meter to track the time it takes for the meter to make a certain number of revolutions, correlating this with the heater's power consumption. Additionally, measuring the resistance of the heater when cold and applying the formula P=U^2/R (where U is typically 230V) can provide an estimate of power, though this may vary slightly when the heater is hot. Caution is advised regarding contact quality during measurements, as corroded contacts can affect readings. For those with clamp meters, current can be measured without direct connections.
Summary generated by the language model.
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