Author Topic: Banana plugs don't fit in positive sockets - Rigol DP832  (Read 13384 times)

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Offline equilibrium

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Banana plugs don't fit in positive sockets - Rigol DP832
« on: November 24, 2014, 05:56:24 AM »
Dear All,

I recently bought a Rigol DP832 and I'm starting to feel like an idiot: the banana plugs don't fit inside any of the 3 positive sockets while they do fit in the three negative sockets and the green chassis socket. As you can see in the attached picture, it only goes in that much and with no amount of force was I able to push it further.

Some things I verified:

  • My banana plugs are 3.88mm in diameter according to my calipers
  • As far as I can see, there is no obstruction in the terminals; a thinner cylindrical object can enter fully
  • There is no mention of a similar thing in the official manual

I'm completely stumped, can you help me?
 

Offline SeanB

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #1 on: November 24, 2014, 06:11:21 AM »
Chinese tolerancing, they shrunk the positive ones to make you buy the "special" red positive leadsets, made from ultra pure finest recycled copper and the finest woven scrap wire.
 

Offline robrenz

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #2 on: November 24, 2014, 06:13:42 AM »
Nothing a 4mm reamer cant cure ;D

Offline SeanB

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #3 on: November 24, 2014, 06:16:35 AM »
Nothing a 4mm reamer cant cure ;D

Failing that a 4mm drill bit, or even a 4.1mm one...............
 

Offline equilibrium

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #4 on: November 24, 2014, 11:26:32 PM »
This is outrageous, I will mail them and ask them to send me adapters for standard jacks/pluggable jacks themselves for free.

Thanks for sharing your knowledge.
 

Online Howardlong

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #5 on: November 25, 2014, 12:00:34 AM »
They are a tight fit that's for sure.

Furthermore, perhaps it's just me, but I'd much prefer -ve on left and +ve on right. Already once I had a near miss, unbelievable I know as they're colour coded, and I always use red and black leads, but I must've been on autopilot at the time.
 

Offline equilibrium

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #6 on: November 25, 2014, 12:02:11 AM »
No actually they don't fit at all. If I hit the plug that you see in the image slightly from the side, it will loosen and pop off.
 

Online wraper

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #7 on: November 25, 2014, 12:12:26 AM »
IMO, your banana plugs also have crap tolerance. Just as coincidence, plus terminal have smaller inside diameter too, so they cannot fit.
 

Offline m100

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #8 on: November 25, 2014, 12:24:45 AM »
They look like they are made by Multi - Contact.  Not had an issue with the 4mm ones fitting equipment but have had oversized 2mm ones that wouldn't even stack to themselves without a huge amount of force.
 

Offline ovnr

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #9 on: November 25, 2014, 12:36:24 AM »
It really annoys me when new products these days don't have banana sockets that you can also use shrouded plugs on. It's not like they don't exist.
 

Offline _Sin

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #10 on: November 25, 2014, 01:05:54 AM »
Apply the appropriate tool?
Programmer with a soldering iron - fear me.
 

Offline SeanB

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #11 on: November 25, 2014, 04:58:36 AM »
RobrenZ mentioned reamers, and I actually have 2 adjustable ones on order. Would love to buy the set of 12, but that comes in at $2500, less VAT. So have ordered the 2 sizes I need now, and they should be here before the end of the year. Still expensive at $200 each, but I need them, a file is not really the right way to get the new bushes to tolerance on the shaft. the bushes themselves are being made to sample, as the nylon ones I get as spares have too much play. Using more off of the 1kg of Vesconite Hilube rod I bought to do another one. Getting a fitting tool made as well to gently persuade them in as well.
 

Offline Bud

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #12 on: November 25, 2014, 05:02:34 AM »
I cannot get rid of a feeling i should stay away from Rigol products.
 

Online Howardlong

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #13 on: November 25, 2014, 07:32:23 AM »
Compared to other stuff I've had from the same neck of the woods, Rigol are positively luxury.

At least the firmware's near enough finished in the Rigol devices I have, and the UIs generally aren't a dog's dinner.
 

Offline apelly

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #14 on: November 25, 2014, 07:48:47 AM »
Mine measure 3.84mm to 4.01mm internal.
I'd rather a Google clue, link, or some theory than "do this" (generally)
 

Online Mr.B

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #15 on: November 25, 2014, 07:53:32 AM »
I have a DP831A and I have no problems with it.
I am however using Fluke brand leads and the quality of the plugs is exceptional.
Time is the overseer of all things.
 

Offline witec

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #16 on: December 21, 2014, 07:43:38 AM »
Hi, was consulting google and found this topic i bought my unit just a week ago, and have exactly the same problem :-BROKE i using hirschmann cable never had a problem like this! only my red sockets don't fitting. should i return the unit?
 

Online Lightages

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #17 on: December 21, 2014, 09:17:09 AM »
The problem with drilling or reaming is that if there is a nickel plating it will get removed. If the base metal is not brass but rather some ferrous metal then you will get corrosion problems and poor contact.
I am NOT a distributor for Brymen.
 

Offline motocoder

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #18 on: December 21, 2014, 04:25:20 PM »
I cannot get rid of a feeling i should stay away from Rigol products.

That's the conclusion I have come to after my recent experience with their service/support. Maybe some day they'll be good, but they still have some maturing to do before they get there.
 

Offline asteroidz

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #19 on: December 21, 2014, 07:36:57 PM »
My DP832 is fine.
Are you using brand name test cords like Pomona?
I got a different problem for my fluke 8505. The cheap Chinese made 20 pcs banana plugs ($5) from Ebay are too small, and half of my 20 adapters wobbles inside the 8505 socket. The plugs I bought are called "GTI - 20 Pcs 4mm Musical Speaker Wire Cable Connector Screw Banana Plug N20 US"
« Last Edit: December 21, 2014, 08:20:13 PM by asteroidz »
 

Offline PA4TIM

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #20 on: December 21, 2014, 07:46:52 PM »
I must say that the Chinese Ebay dealers are very inventive, is there a product they do not srew up ?
I have around 40 instruments that have banana jacks an even more leads with banana plugs and they all fit. The tolerances used by Rigol are not tight enough, I hope for you their metrologic tolerances are better  ;)
www.pa4tim.nl my collection measurement gear and experiments Also lots of info about network analyse
www.schneiderelectronicsrepair.nl  repair of test and calibration equipment
 

Offline sotos

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #21 on: December 21, 2014, 09:59:02 PM »
Not Rigol, but I have same problem here, with my Tektronix power supply and hirschmann connectors.
If someone is kind to tell me how to post pictures I will.
 

Offline witec

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #22 on: December 21, 2014, 10:20:56 PM »
Not Rigol, but I have same problem here, with my Tektronix power supply and hirschmann connectors.
If someone is kind to tell me how to post pictures I will.
 

Offline sotos

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #23 on: December 21, 2014, 10:30:22 PM »
Not Rigol, but I have same problem here, with my Tektronix power supply and hirschmann connectors.
If someone is kind to tell me how to post pictures I will.

They big, over 1000KB and I cannot upload them.

 

Offline HighVoltage

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Re: Banana plugs don't fit in positive sockets - Rigol DP832
« Reply #24 on: December 22, 2014, 12:26:09 AM »
I had some good quality test leads, made by Hirschmann - Germany, and they did not fit in to an Agilent PSU.
These 4 mm plugs had one of these plastic tips in the front and their diameter was too large. I managed to get one of these plugs in to the PSU but when I pulled the plug out, this stupid red plastic tip stayed inside the binding post. After that I removed all plastic tips from all of these connectors. Kind of ridicules, if you think about it. Buying German made quality and it still sucks from time to time.
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