My hot plate is 120 v., 13.5 A., 1620 W. How do I figure how many Watts it uses when set to a particular setting, e.g. #6 out of 10?
120 v. is a constant
I think I can measure resistance (ohms) when the hot plate is set to, e.g. #6. This, too, is constant because the temperature control is corroded and stuck at the setting we always use.
I need to calculate Watts to ensure that I get the proper timer to plug it into. We don’t have a timer rated for 1620 W or higher and I won’t be allowed to buy one for this purpose.
Update:
@rudras
Another way to ask the question is: If I have volts and ohms, how do I calcualte watts?
I’m sorry if this seems too simple for you, but I don’t know how to do it.
Update 2:
@rudras
Another way to ask the question is: If I have volts and ohms, how do I calcualte watts?
I’m sorry if this seems too simple for you, but I don’t know how to do it.
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OK, there seems to be a fundamental misunderstanding here.
The hot plate is 1620 watts.
If you turn it down, it is STILL 1620 watts but it switches on and off all the time so the ring doesn’t get too hot. The lower you turn it down, the longer it stays switched off and the less time it switches on.
The controller is not a variable resister but a ‘simmerstat’ which constantly cycles. Your power consumption jumps between 0 watts and 1620 watts as the control cycles.
Hot Plate Uses
Source(s): https://shorte.im/a9zp9
When hot plate is set to its highest (heat/power) setting,
the ohms (resistance) measured at the plug should be R = V/I = 120/13.5 = 8.89 Ω.
If U can’t move setting because of corrosion I wouldn’t use the hot plate because corrosion could also cause an internal short circuit and possibly worse (fire) :>)
…but for the case of argument, if plate is stuck at setting #6, just measure the resistance at the plug (it should be less than 8.89 Ω) and since the voltage is constant compute the current I = V/R.
A timer-switch is usually rated in terms of switchable amps so the current is all U should need.
If power is calculated, it’s just 120(I).
Hi All, i will like to ask a question here. If my hot plate have maximum temperature of 5 oC and power rating of 1520 Watts, what will be the power output if i set the hot plate temperature to 140 oC.
Many thanks
Come on man that is an easy one. Use some basic formulas listed here.