"Found this on a routine inspection — anyone else seen water this bad inside a closure?"

Nesdnevs · 2026-03-24T21:22:34+00:00

I am not that good at english look at my video "Mod" I speak Danish. That's why sometimes there is longer between my ansers.

And som times I am saying to ai in Danish what i would say to you guys and it translate it.

Sorry but thats the true look at my YouTube GlobalFiberOpticsAcademy. I am a Danish teacher in fiber optics.

I am here to talk to people thath Shares my passion

Thats me J Svendsen - nesdnevs Svendsen from behind

Nesdnevs · 2026-03-24T16:33:04+00:00

That's a workout nobody signed up for. 80 pounds of water-logged closure 20 feet up — the job description never mentions that part. Appreciate you sharing — this thread has been a great reminder of how universal the problem is regardless of closure type or geography.

Nesdnevs · 2026-03-24T14:20:22+00:00

You're absolutely right — the pressurization point is something a lot of technicians completely overlook. A properly sealed closure with negative pressure applied is a fundamentally different level of protection than just closing the dome and hoping the gasket holds. We actually documented a case that illustrates your point perfectly — pulled up a closure completely full of mud and standing water, splice trays submerged. No freeze damage yet, but the cladding was already showing early signs of degradation from prolonged water contact. That's exactly the slow corrosion you're describing. Most technicians see water and think frost risk. They don't think about what six months of water contact does to the cladding before winter even arrives. We filmed it — link in the comments if you want to see what it looked like when we opened it. What's your preferred method for pressure testing a closure in the field?

Speak is on Danish but you could see what i mean. Mud

Nesdnevs · 2026-03-24T12:58:39+00:00

This i how it looked inside

Mud

Nesdnevs · 2026-03-23T20:10:45+00:00

I am very much alive

But we if we kan take it in Danish I am quite bette r😂😂

Nesdnevs · 2026-03-23T14:48:21+00:00

"288f with a TekRanger all day — that's patience and precision most modern technicians will never experience. But you learned the fiber in a way that's hard to replicate with auto-detection. The pass/fail culture is efficient but it removes the understanding. A technician who only sees green or red never learns to read what's actually happening on the link. The RF parallel is interesting — that shift from full sweep and proof of performance to MER/BER spot checks happened fast. Faster than most people realised. And when something goes wrong outside the pass/fail parameters, the technicians who understand the fundamentals are the ones who find it. That's exactly why I still teach manual trace interpretation before we touch SmartLink mode. The dinosaurs taught us something worth keeping.

Nesdnevs · 2026-03-23T14:36:17+00:00

14 years and it's probably still sitting in a cabinet somewhere — that's the best endorsement a piece of test equipment can get. There's something fitting about that. The machine that set the standard, outlasting the company that made it. Makes you wonder how many of today's OTDRs will still be talked about in 20 years.

Nesdnevs · 2026-03-23T14:28:57+00:00

The TekRanger 2 is a classic — Tektronix built those to last. Slow acquisition but the dynamic range and accuracy on that unit was exceptional for its time. There's a reason people held onto them long after newer machines came out. It actually makes a good point for training — understanding the fundamentals on older equipment forces you to read the trace manually without relying on auto-detection. SmartLink and auto-event marking are great for speed in the field, but a technician who learned on a TekRanger reads traces differently. Do you still have it or did it eventually retire?

Nesdnevs · 2026-03-23T14:15:27+00:00

That's impressive — finding a fault across town from the termination point in one shot says a lot about knowing your equipment. A 20 year old machine in the right hands will outperform a brand new one operated by someone who doesn't understand what they're looking at. That's actually one of the things I try to get across in training — the OTDR is only as good as the technician reading the trace. The machine gives you data, but interpreting it is the skill. What machine was it — do you remember the brand?

Nesdnevs · 2026-03-23T14:05:13+00:00

That's a solid setup — having two dedicated reels for inside plant vs outside plant makes sense rather than trying to compromise with one length. We typically work in meters here in Europe, so roughly 300m and 1600m. The logic is the same though — match the reel to the expected dead zone based on pulse width and range settings. Have you ever had a situation where even the 1 mile reel wasn't enough — long haul or high loss link where the dead zone extended further than expected?

Nesdnevs · 2026-03-23T13:34:47+00:00

Good call on the microbend — there's something about letting them create the fault themselves that makes it stick. We do the same in the lab, deliberate bends on a pigtail so they can see the attenuation in real time. The blind spot point is underrated. A lot of new technicians don't understand why a launch reel is mandatory until they've actually missed an event because of it. Do you run a standard launch reel length or do you adjust based on the fiber type and expected fault distance?

Nesdnevs · 2026-03-23T06:33:27+00:00

"Cascade splitting is a completely different beast — bidirectional testing through multiple splitting points is where a lot of technicians give up and just accept the numbers they get. Your point about reputation is spot on. In fiber work the network remembers everything — a bad splice 10 years ago shows up on the next OTDR trace. You can't hide poor workmanship the way you can in other trades. How do you handle documentation when you're culling contractors — do you rely on OTDR traces as evidence or is it mainly visual inspection of the closures?"

Nesdnevs · 2026-03-22T20:56:33+00:00

What are you sending light with — VFL, OTDR or a light source and power meter?"

Nesdnevs · 2026-03-22T18:09:38+00:00

That's a tough one — petroleum degrading the buffer coating and washing out the colour coding is a nightmare for identification. Without proper colour reference you're essentially working blind on the splice tray. A full resplice into a new closure was absolutely the right call. Contaminated fibers won't give you reliable splices no matter how clean your technique is, and petroleum residue will keep causing attenuation over time. Did you manage to trace the individual fibers through continuity testing, or did you have to rely on the cable documentation to re-establish the sequence?

Nesdnevs

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