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Re: DCC Ammeter


 

Wouter/Don,
Your responses are similar so in my layout, I do the voltage across the rails, as indicated, but for current, I was putting the meter in line with the bus wires, i.e. two wires in and two out, which is different to how your diagram, Wouter,? shows it. So for confirmation, I feed one wire in and through the meter and the second power wire by-passes the meter? In which case, does it matter which terminals on the meter (top in/out or bottom in/out) are used?
Thanks for your responses, Guys!
John


On Sun, May 5, 2024 at 1:57?PM whmvd via <vandoornw=[email protected]> wrote:
Sounds to me like you are shorting the Power Pro with the amp meter. For voltage, the meter must be across the track, for current it must be in one of the power leads.

Voltage:
??????????????????????????????????? |????????????? |
??????????????????????????????????? |??? track???? |
Power Pro --------------------------x????????????? |
??????????????????????????????????? |????????????? |
??????????????????????????????????? |????????????? x------------------ X
??????????????????????????????????? |????????????? |?????????????????? meter
??????????????????????????????????? x------------- | ----------------- X
??????????????????????????????????? |????????????? |
Power Pro ------------------------- | -------------x
??????????????????????????????????? |????????????? |
??????????????????????????????????? |????????????? |
??????????????????????????????????? |????????????? |


Current:
??????????????????????????????????? |????????????? |
??????????????????????????????????? |??? track???? |
Power Pro --------X meter X---------x????????????? |
??????????????????????????????????? |????????????? |
??????????????????????????????????? |????????????? |
??????????????????????????????????? |????????????? |
??????????????????????????????????? |????????????? |
Power Pro ------------------------- | -------------x
??????????????????????????????????? |????????????? |
??????????????????????????????????? |????????????? |
??????????????????????????????????? |????????????? |

Wouter



On Sat, 4 May 2024 at 22:06, John Cahill via <johncahill25=[email protected]> wrote:
Hi! I¡¯m looking for help with my DCC Ammeter. I have had it for number of years and used it as a voltmeter only while building a large layout to test for power, shorts, reversed wiring in hand-held mobile mode. I¡¯m using NCE Power Pro¡¯s to control the layout which is divided into three power districts each with a PSX for short circuit protection. The layout is built and has some glitches and I need to be able to measure current. My specific question is: why am I seeing a reading of 5.24 Amps regardless of where I place the meter. I plug it in line in the different busses and at the booster output, and always get the same current reading.Voltage is 14.2, Current reads 5.22A. I have also tried it on my Power Cab test layout which I use for programming and testing decoders and locos. Voltage 11.8-12.1, Current 5.2A. This suggests a problem with the meter or that I¡¯m using it incorrectly. I¡¯ve tried contacting TTE¡¯s tech support but haven¡¯t heard anything back so I¡¯m hoping someone on here can help me with this problem! Thanks in advance. John

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