What about a wattmeter?Traditionally a Dynomometer is used to measure Power (HP).
Max.
We dont have dynamoteter here. All we have is a ammeter,wattmeter or voltmeter in the shop so what other meter would be close to get the true power. A wattmeter is a device that is used for measuring electrical power. They measure in terms of watts. This can tell you if an electrical device is working properlyThe wattmeter determines input. The dynamometer determines output. They will not be the same.
Note that the load is important, since the motor performance will vary with the load. "Power" is not an abstract, one point measurement.
Why not? Its not the extensive of a test that warrents such equipment to buy. I did not vote for obama so with watching spending you use what you have. And those were the choices we have to use. But I will pass your thoughts on to management and will see what happens. ThanksA wattmeter CANNOT measure the mechanical output of a motor.
None of the things you mentioned can measure the mechanical output power of a motor. You either have to get a dynamometer or go without the measurement.
If you couple the motor to a generator, then accounting for another set of losses you'll have an idea of the power output for a given load. Not a very complete picture, but better than nothing.
PS -- why are you asking such questions without the equipment or the budget to get the answer?
It makes as much sense as "measuring" the swimming speed of Michael Phelps by looking at the plate of food he eats. Electrical power in does not give you the shaft-work power output.Why not?
Proper names are supposed to be capitalized. I don't care who you voted for and neither does the motor. You still can't use what you have to measure the power output of the motor. So quit your whining. You either spend the money or go without the measurement -- which one hurts worse?Why not? Its not the extensive of a test that warrents such equipment to buy. I did not vote for obama so with watching spending you use what you have. And those were the choices we have to use. But I will pass your thoughts on to management and will see what happens. Thanks
Temp + prssure as in superheat and subcooling. Man I sure asked a hard question my bad soory to make everyone think so hard for a friday. Theres 5 min I wont get backActually, if pushed to measure the output of a motor in some remote corner of the earth, I might consider Joule's orignal method.
Connect the motor to drive a paddle inserted in an insulated drum of water and measure the temperature rise for a given measured electrical input.
Datasheet is not readable and no manufacture either. Its like following a wiring diagram with no schematics. Also need to find the cfm and think this is the right calc cfm2=rpm2 x cfm1/rpm1A good motor will usually have its efficiency published in the datasheet .
Would it be reliable to measure the Electrical power input using a wattmeter and to multiply it by the efficiency to get an ouput power reading?
I guess the question is ... How accurate of a reading do you really need?
A good datasheet will have an rpm/load versus efficiency curve
What on earth does this mean?Temp + prssure as in superheat and subcooling. Man I sure asked a hard question my bad soory to make everyone think so hard for a friday. Theres 5 min I wont get back
This hurts worse Obama cant do it obama with no caps I feel better and the wattmeter worked for what we needed.Proper names are supposed to be capitalized. I don't care who you voted for and neither does the motor. You still can't use what you have to measure the power output of the motor. So quit your whining. You either spend the money or go without the measurement -- which one hurts worse?
That was a little hvac terminology I thought I would throw in. Pressure/temp relation. Where pressure = temp and temp=pressureWhat on earth does this mean?
by Jake Hertz
by Jake Hertz
by Aaron Carman
by Aaron Carman