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  1. #31
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    Quote Originally Posted by doug3030 View Post
    On the decibel meter on my phone it never reads below 40 and never goes over 90. Still, not completely useless, just very very limited.
    Doug,

    That's not good at all. Is it worth deleting it and downloading another? My app was created by Smart Tools Co. and seems to work very well.

    If I shut myself into a quiet room late at night it reads just below zero ... as it should. The highest reading I got was 97. Difficult to believe it is your microphone ... got to be the software.

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  3. #32
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    Quote Originally Posted by John Samuel View Post
    My app was created by Smart Tools Co. and seems to work very well.
    Mine was created by smart tools too . must be the phone. but what do you expect from a $49.90 smartphone, I suppose.

    Doug
    I got sick of sitting around doing nothing - so I took up meditation.

  4. #33
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    You have me worried now John. NCArcher contacted me and detailed the connections for me and after checking last night I am almost 100% sure the sparky has them right.

    The input to VFD is red RL1, black is SL2. According to Chris and NCArcher it doesn't really matter wether black is to TL3 or SL2.

    The output from VSD is red to UT1, Blue is VT2 and white is WT3.

    The input to motor is blue to W1, White to V1 and red to U1.

    Metal connections run across to V2 U2 and W2 and the green earth at both ends(not a shielded cable)

    Does this differ from yours?

    It might help if we can sought this because apparently there have been a few faults caused by sparkies who have had little experience on the electronic side and it might help others setting their cyclone up.

    Safari

  5. #34
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    Quote Originally Posted by doug3030 View Post
    Mine was created by smart tools too . must be the phone. but what do you expect from a $49.90 smartphone, I suppose.
    Doug,

    Does not compute ...

    I was taking readings with mine yesterday, 16 M from the cyclone (outside). When the birds chirped the meter jumped around. If a car drove by (100 M away), you could watch the reading climb and fall with the passing of the car. Had to lock my dog inside because he wanted to growl at the birds, and even a soft, low growl was resulting in a jump in the readings. A bark jumped to about 90 dB.

    If the microphone in your phone works OK for conversation, it should do better than you indicate.

    That's weird Something is not right.

  6. #35
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    Quote Originally Posted by safari View Post
    Metal connections run across to V2 U2 and W2 and the green earth at both ends(not a shielded cable)

    Does this differ from yours?

    It might help if we can sought this because apparently there have been a few faults caused by sparkies who have had little experience on the electronic side and it might help others setting their cyclone up.
    Sounds like you are hooked up for star (415V) and not delta (240V). Mine was like that, but my motor still ran ... and buggered up the VFD.

    Look at your compliance plate on the motor and at the diagram on the inside of the wiring cover for the motor. Star looks like a three pointed asterisk ... that's the arrangement for 415 V. Delta is shown as a triangle ... that's the hook-up for 240 V, and is what you should have, assuming you do not have 3 phase power and are hooked up to 240 V.

    For delta (assuming we have the same motor) U1 should be connected to W2 ... V1 should be connected to U2 ... W1 should be connected to V2. (Your compliance plate and the diagram on the inside of the wiring cover on the motor illustrate correct connections for star and delta)

    Another way to put it is this. Look at the metal connectors. Assuming your motor is like mine, if they are vertical, you are wired for star. They should be horizontal.

    Sounds like we both got sparkies who know zip about wiring motors. I hired a sparky to be sure I got it right ... but he made a dumb mistake I would not have made. I would have followed the wiring diagram faithfully because as a sparky I would make a great cricketer. Knowing nothing, one follows the diagram ... exactly.

    Finally, once you get the motor spinning, make sure it spins the right way. If it does not, switch any two of the three wires (excluding the earth) on the VFD, and it will spin the right way (this instruction is in your manual).

    Good luck!

  7. #36
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    Quote Originally Posted by John Samuel View Post
    Doug,
    That's not good at all. Is it worth deleting it and downloading another? My app was created by Smart Tools Co. and seems to work very well.
    If I shut myself into a quiet room late at night it reads just below zero ... as it should..
    That really depends where your live. To get a zero reading there has to be no traffic within a couple of km, zero wind outside and the temperature has to be relatively constant as warming and cooling houses make noises across the frequency range. If this is not your situation then the meter is not reading correctly. The lowest I saw my iPhone app reading go inside the house during yesterday was 30 dB - this is also the lowest reading I get in my shed. We are 5 km from a major freeway and ringed by a major highways and major roads. When the wind is blowing in the right directions we can hear some animals at the zoo about 4 km away

    The highest reading I got was 97. Difficult to believe it is your microphone ... got to be the software.
    Flatlining like that means the microphone has reached saturation

  8. #37
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    Bob,

    I'm sure you are right, but at night the back of the house is very quiet. My tests yesterday show the microphone following the inverse proportional law as theory predicts. It is likely my instrument is not perfectly calibrated (if it is out, I reckon it might read a little low), but its response looks pretty good. As I type there is a bird several metres away from my window. Every time it chirps the meter jumps about 10-20 dB, and I can watch the plot of values rise and fall as a car drives past 100 M away. When taking readings yesterday, I needed to wait for the wind to drop, because the rustling of the leaves lifted the readings. I cannot move when taking readings below about 30 dB, because even a soft foot fall registers on the instrument.

    Of course, zero decibels is not zero sound. It is the reference level, so when things get very, very quiet, the readings should fall below zero. Nevertheless, because I don't know how good my calibration is, I cannot trust the absolute readings. As you indicated earlier, that does not really matter if all I want is to know whether or not things are getting quieter. I am confident the instrument does that reasonably well.

  9. #38
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    Quote Originally Posted by safari View Post
    A mate came over today with his Iphone and decibel app. We ran the cyclone for a couple of short periods ( approx 3-4 mins ) and recorded 98db with the cyclone as pictured in my previous post.
    A bare uninsulated cyclone only reads 92 db out of the exhaust so I think the readings may be a bit wobbly.
    CHRIS

  10. #39
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    Quote Originally Posted by Chris Parks View Post
    A bare uninsulated cyclone only reads 92 db out of the exhaust so I think the readings may be a bit wobbly.
    Some of it could be reflections, his roof is very close to the impeller/motor.

  11. #40
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    He could not get it any closer to the roof than my original installation.
    CHRIS

  12. #41
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    Quote Originally Posted by Chris Parks View Post
    He could not get it any closer to the roof than my original installation.
    So is the 92 db the factory spec - which I assume would be in the open ie reflectors some distance away, or was it a specific installation?

  13. #42
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    I have never seen any factory noise figures for a cyclone with or without an open exhaust. I have always used mine as the yard stick when making people aware that they are damned noisy. I have heard others say they are around mine so have no reason to question my readings.
    CHRIS

  14. #43
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    Quote Originally Posted by Chris Parks View Post
    A bare uninsulated cyclone only reads 92 db out of the exhaust so I think the readings may be a bit wobbly.
    Chris,

    Sounds about right to me. My bare, un-ducted cyclone read 97 dB from 3 M away at head height. My instrument is not calibrated, but seems to be in the right ball park.

  15. #44
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    John, I am away for easter so can't absolutely confirm but when I looked on Friday I am sure the metal connectors are horizontal. On the motor cover the diagram for star shows that the left hand terminal should be connected vertically not horizontal as for Delta.

  16. #45
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    Quote Originally Posted by safari View Post
    Metal connections run across to V2 U2 and W2 and the green earth at both ends(not a shielded cable)
    OK,

    It seems I misunderstood the quote above. Read it as if the links were running ACROSS V2, U2 and W2. Sorry.

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