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Small Distro Meters -Was 32A Distro Build! |
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shagnasty 
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Joined: 30 July 2007 Location: Guildford, UK Status: Offline Points: 7683 |
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 Topic: Small Distro Meters -Was 32A Distro Build!Posted: 10 June 2012 at 1:10pm |
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I will do, my plan is to pretty much bolt all 3 units to the same line and load it up to see what they say vs my true RMS meter
I wanna find out what CTs they use as obvioulsy with more CTs and some switching you could make a neat 3 Phase distro (at the price you could use 1 meter per phase, but I am looking at a 3PNE 2u unit so no space)
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djeddie
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Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
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Posted: 10 June 2012 at 2:26pm |
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Top man!
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Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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shagnasty
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Joined: 30 July 2007 Location: Guildford, UK Status: Offline Points: 7683 |
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Posted: 27 June 2012 at 1:05am |
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Ok, status update...
2 meters Black one to known a "cheap chinese meter (CCM)" and white one to be known as "very cheap chinese meter (FCCM)"
FCCM paid for on 10th, arrived 26th...
CCM paid for 31st, arrived 2 days later...
Ebay link used ;-
FCCM
CCM
I have to say, both were packed to withstand a Nuclear hit, and even a UK courier, so 10/10 there, remember CCM does Amps/Volts/hertz FCCM only does Volts and amps...
here's what you get :-
 So next step is to drink tea and go to bed...
Will have some trials ASAP and post results!!!!
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dylan-penguinmedia
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Joined: 14 April 2011 Location: Brighton Status: Offline Points: 4542 |
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Posted: 27 June 2012 at 4:21pm |
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Can't go far wrong for the money can you? Look forward to the results...
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kewy
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Joined: 13 June 2010 Location: York Status: Offline Points: 144 |
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Posted: 27 June 2012 at 4:29pm |
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i've got 3 of the FCCM's on my new distro i built, cant complain realy, voltege meter seems to work ok, pluged all three into the same phase and they read within 2v of each other. as for the ammeter side of things, i havent run the system up loud so couldent get them to read more then 2A apart from when i started them amps up when they read about 6A for the FFA10000.
display wise, its bright and easy to read from a fairly wide angle. for £12 a throw you cant go wrong! any questions and i'll try help! |
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shagnasty
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Joined: 30 July 2007 Location: Guildford, UK Status: Offline Points: 7683 |
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Posted: 27 June 2012 at 6:02pm |
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And the FCCM is line powered, so no +12V required.... I'll be using a kettle to check the current side, that way drinking tea becomes a must!!!
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djeddie
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Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
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Posted: 27 June 2012 at 7:45pm |
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Where there's tea there's hope.
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Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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SamV
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Joined: 21 October 2008 Location: London Status: Offline Points: 8783 |
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Posted: 28 June 2012 at 5:12am |
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I have a bunch of 19" 32a to 4x 16a supplies which I'm tempted to stick a FCCM in each. Can't wait to see how you get on :)
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shagnasty
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Joined: 30 July 2007 Location: Guildford, UK Status: Offline Points: 7683 |
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Posted: 24 August 2012 at 12:01am |
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Ok a while has passed.
Just built a 2U PDU for a member...
Used the CCM for this, so had to build in a 12V regulated PSU.
I am not PAT fan so my testing is simple, PSC L-N and PSC L-E on every outlet....
I've done this, all good, I also "patched in" a FCCM for testing, now to keep it simple a single load, my kettle...
Easy way to get loadin? use a PAT device :-
 so :- 2605 @240V = 10.85 amps
Results from the meters :-
 Not spot on, but OK...
Ok lets do Line voltage :-
 The Cm500 read 243 so no argument there!!!!
Now the FCCM doesn't do Hertz, but the CCM does so :-
  Again within spec....
Off topic but PSC L-N or L-E showed :-
 And on any output of the Dstro hit the same...
so this :-
 Gives this ;-
 which is 3 x 20A circuits on 6 x Powercon
2 x IEC out on 6A and 2 x IEC out on 10A.
Thread was about meters so I will say this :-
My Cm500 and my PAT4 were both cal'd in feb, they are both pretty neat kit that I use everyday, so i trust them as right..
Google the cost on either...
THe CCM needs a 12V supply, I used a fuse holder, fuse, 6Va tranny, full-wave rec, Zener, Dump resisitor and 1000uF 25V cap, this gives me Hz + V + A
The FCCM needs AC only...
If you don't use gens, this is the way to go....
I used my kettle to load the rig, the PAT device was used to test the PDU and them I hit evey output with the CM500 in both L-N PSC and E-L PSC.
The neons make it fail an insulation test, But with them of circuit it clears 10Mr L-E, N-E, fails L-N because is has a PSU for the meter inside (1A Fuse, but you take the lid off to get to it!!!)
I am not gonna conclude here, i used £3K plus of kit to do this test, both units cal'd Feb this year...
I think the cheap meters ore pretty bloody sweet, and IMHO worth 3x the cost of either...
Again the neons, all 250V Ac spec...
Amber (L-N) means 240v were you hoped...
Green (L-e) Means you have mains and an earth!!
Red (E-N) WTF, STOP! you have issues!!!
Before I post...
Yes that is half a Powercon...
Yes I did twist the wires to get a 240V feed to the FCCM, but I used "phase" tape to cove it...
Do you shouldn't do this...
Yes I could have "blobbed" the PowerCon out in Photoshop, but didn't bother...
yeah the whole job has Stainless steel, Nylok'ed fittings and is a bit OTT...
Before anyone asks, the whole job could run 3PNE on the same frame but the metering would be an issue.......
Edited by shagnasty - 24 August 2012 at 12:12am |
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GAZ.
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Joined: 16 January 2007 Location: Hertfordshire Status: Offline Points: 2428 |
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Posted: 24 August 2012 at 12:30am |
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I bought one of those black meters. I've yet to get around to fitting it to the amp rack, but I did do some tests with it against a fluke DVM and a variac. Got similar results to you, not 100% accurate but only a volt or so out so good enough for me!
That white meter looks ok, I might get one of those to use instead, saves having to faff around sorting out an isolated 12v supply for the black one. |
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100% Earth Moving Bass
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shagnasty
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Joined: 30 July 2007 Location: Guildford, UK Status: Offline Points: 7683 |
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Posted: 24 August 2012 at 12:34am |
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Yeah...
the black one does Hz....
but really, a good Genset company will do that, if you run house Ac then no need for frequency, the FCCM aslo does V & A on the same screen.....
TBH, the FCCM has a lot over the CCM but me, I like the 3 functions!!!!
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GAZ.
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Joined: 16 January 2007 Location: Hertfordshire Status: Offline Points: 2428 |
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Posted: 24 August 2012 at 12:59am |
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The 2 readouts on 1 screen and no seperate 12v swings it for me. Plus the fact my rack has only ever been connected to a gen once so the hz reading isn't that important for my needs.
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100% Earth Moving Bass
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djeddie wrote: