Author Topic: Need a recomendation on cables  (Read 2415 times)

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Offline ZenwizardTopic starter

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Need a recomendation on cables
« on: October 28, 2022, 05:11:00 pm »
What is a good set of cables to use on a fluke 5200A. I would like to get a set of shielded cables if I can because I have some excess noise in the lab that really gets ugly on the lower ranges. I will also need 2 sets because I would like to use remote scene. I need a bit of length because I dont want to have to move the 5200 or 5205 around the lab if I can help it. There is some gravity in those.

Zen
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Offline alm

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Re: Need a recomendation on cables
« Reply #1 on: October 28, 2022, 05:52:32 pm »
This is only for the 5200A, right, since the 5205A has it's own permanently-attached lead? I'd say two sets shielded twisted 2-wire leads terminated on low-EMF spade lugs on the 5200A side and either low-EMF spade lugs or low-EMF banana plugs on the other side. Pomona or Fluke might sell something like this for $$$, or you can make them yourself. Member ap low-EMF cables and parts, but this may not be so convenient in the US. Maybe LowThermal?

Offline ZenwizardTopic starter

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Re: Need a recomendation on cables
« Reply #2 on: October 28, 2022, 07:01:13 pm »
It does have a permanently attached lead bit I will need something a bit longer at some point. The 5205 lead comes out as 4mm banana at the end.
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Offline alm

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Re: Need a recomendation on cables
« Reply #3 on: October 28, 2022, 09:44:09 pm »
Looking at the service manual, the 5205A extends remote sensing until the end of the cable, so ideally when extending you would also extend the sense lead, which would likely require cutting the existing lead. Of course whatever you build would have to be safe up to 12000 Vrms. I wouldn't bother extending the 5205A cable, but rather have the mountain (DUT) come to the 5205A.

Offline srb1954

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Re: Need a recomendation on cables
« Reply #4 on: October 29, 2022, 03:18:18 am »
This is only for the 5200A, right, since the 5205A has it's own permanently-attached lead? I'd say two sets shielded twisted 2-wire leads terminated on low-EMF spade lugs on the 5200A side and either low-EMF spade lugs or low-EMF banana plugs on the other side. Pomona or Fluke might sell something like this for $$$, or you can make them yourself. Member ap low-EMF cables and parts, but this may not be so convenient in the US. Maybe LowThermal?
Do you really need to use low thermal EMF parts in this application?

Presumably you are mainly calibrating AC instruments with the 5200A and these would be AC coupled and would ignore spurious thermal DC voltages. Even if you were calibrating a DVM with a TRMS AC+DC mode the impact of a few uV of thermal EMF would be negligible compared to other errors encountered in low-level TRMS measurements.




 

Online bdunham7

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Re: Need a recomendation on cables
« Reply #5 on: October 29, 2022, 03:58:02 am »
I don't have a 5200A around anymore, but I simply used BNC/RG58 cables and banana-to-BNC adapters at the ends.  I still use the same cables with a lower frequency (50kHz) calibrator and, without one adapter, the wideband calibrator function on the 5100B.  Well, not so much the latter anymore as it is actually not that good compared to an AWG.
A 3.5 digit 4.5 digit 5 digit 5.5 digit 6.5 digit 7.5 digit DMM is good enough for most people.
 


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