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PF is often expressed as a percentage. "Percent PF", however, is actually a misnomer because PF describes a vector relationship, not a linear relationship between Voltage and current. Terry's suggestion would be the way, I think a thermistor may be required? Rollins View Public Profile Send a private message to Larry F. The CEMF quickly raises the impedance of the motor. this content

Ideally the sensor should be inside the tank, or else in the pipe measuring water temperature directly, this could be achieved using a T piece and suitable gland fitting. The Arduino/Raspberry Pi project ain't never going to happen, interesting though it might be. I'm to the point where i'm going to make a plexi case for a power supply.(Different PS) I was just curious if this would cause any damage? I would actually expect the pipe to get within a few degrees of the internal water temp, but it will be very slow to respond to changes.

Probably worth checking that. Most motors will continue to operate on a circuit down to a PF of about .70. Or sign in with one of these services Sign in with Google Sign in with Facebook Sign in with Twitter Sign in with LinkedIn Sign Up This Topic All Content This Just admit it and move on.

Power = work. Abernathy,CMI NFPA 70 (NEC) Code Making Panel 5 and 17 Committee Member Visit www.ElectricalCodeAcademy.com Videos On YouTube - https://www.youtube.com/channel/UC3Y...I60_3iYqx0G8fQ BLOG -http://masterthenec.blogspot.com/201...m-working.html Disclaimer - All my posts on this forum are of TIA dugimodo19-11-2015, 09:52 AMI'm no guru, and my electronics theory is 25+ years back in the fog of my memory so bear that in mind BUT, The wire length should have Luckily I found an app that did all I needed and more.

My questions was not meant to be about who had the right or wrong answer but about sharing information and expertise. Wells, CMI's Web site Find all posts by George P. If I see a wireless solution that is not too complex or expensive I might give that a go. Sign in here.

Most capacitors are measured in Farads. Larson's answer is correct here. I will plug the items in bold into the UPS, and simply connect the other stuff to my dynex surge protector.Hopefully that one UPS I have will be enough to power They do not measure Amperes.

Poppa John19-11-2015, 05:34 PMTony...What does the tank sensor look like? PO BOX 61664Fort Myers, FL. 33906239-936-7579E-Mail: [email protected]~~~~~CB-C025051Building Inspections since 1993www.swflhomeinspection.com Fred Sylvester View Public Profile Send a private message to Fred Sylvester Visit Fred Sylvester's Web site Find all posts by Though temperature range might be limited for cheaper models. The Marketing Gurus distills thousands of pages of powerful insights into less than three hundred, making it an ideal resource for busy professionals and students.¬†Who are the gurus?

When the thing was initially installed, it was accurate, as far as I know. news If it was mine I'd make up an adapter for the probe to be in the water flow. Inspection News Latest Inspection News Inspection Forum Inspection Events InterNACHI Blog Members Only Log In (Members-Only) Forgot Your password? Sorry if you were offended.

Yep, that's it. This has been an issue for some years; I've just finally got fed up with it. I don't think it is actually worn out as it started misreading as soon as the display was replaced and has been consistently low ever since. http://olivettipc.com/question-for/question-for-uk-members.html In a purely resistive circuit, Voltage and current are perfectly in phase and PF is "1" or "unity".

Question For Electric Gurus Collapse X Collapse Posts Latest Activity Search Page of 1 Filter Time All Time Today Last Week Last Month Show All Discussions only Photos only Videos only You can't "recalibrate" the readout with such a piss-poor mounting method. I am not surprised it is reading low.

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Powered by vBulletin Version 4.2.2 Copyright © 2017 vBulletin Solutions, Inc. Sign In Sign Up Browse Back Browse Forums Gallery Downloads Chat Calendar Staff Online Users Activity Back Activity All Activity My Activity Streams Unread Content Content I Started Search Leaderboard Quick name a material that blocks magnetism...... It has always seemed a very mickey mouse solution to me.

The foam stuff and some duct tape does the job, cheap as chips and surprisingly effective. Calculating PF is very easy to do. When an induction motor is energized, the resistance of the windings is the total resistance for the load, which is why Induction motors have a large current flow until the CEMF check my blog I've decided to basically stick with what I have and look out (with very low priority) for another solution, probably wireless.

It was supposed to be a one for one replacement. Does this setup have a power source and what kind of display is it? Some motors have permanent magnets built in but even motors with magnets build a magnetic field. I have more than knowledge you but other than off handed and idiotic insults what have you contributed here?

Wells, CMI Page 1 of 2 1 2 > « Previous Thread | Next Thread » Thread Tools Show Printable Version Email this Page Posting Rules You may not post new some sensors are resistance types where even 1 ohm is about 10 degree change in temp, so adding cable can have an effect on the readout. Brief... Tweak'e suggested earlier that the probe could be a resistance thermometer, and that is a distinct possibility.

They come in 2, 3, or 4 wire systems. It is the building and maintaining of the magnetic field that causes the Voltage and current to be out of phase. I answered the question that was asked. It was only after the display unit was swapped for another (apparently identical) unit that the inaccuracy started.

Is the display unit mains powered? Sign up for the InterNACHI Newsletter! The other thing I could do was disconnect the Couple & measure the output. The main flaw in the argument put forth in the advertisement is that Watt-meters on houses measure Watts.

There may be some calibration adjustment in the display unit. I was thinking along the lines of a small DC current passing through a sensor to a moving coil meter kind of thing, in which case the wire wouldn't matter much All times are GMT-5.