Author Topic: Transit calibration cases for our precious references.  (Read 1015 times)

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Offline TiN

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Transit calibration cases for our precious references.
« on: May 25, 2019, 12:32:47 pm »
My xDevs Volt is getting ready to travel with me on train next week for some Quantum Volt love.
So I visited few photocamera retail stores and got this nice Pelican 1535 Air hardcase.

It's good to fit either one 732B/C or 732B/C+charger unit if travel is >3 days.



This 1535 case also suitable to fit half-rack DMMs, such as Keithley 2002.



Make sure to use ESD bag around the sensitive equipment, as foam insert is great at generating immense amounts of static electricity.

What you use for your precious equipment transport to/from calibration lab?

« Last Edit: May 25, 2019, 03:10:03 pm by TiN »
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Offline CalMachine

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Re: Transit calibration cases for our precious references.
« Reply #1 on: May 25, 2019, 01:20:36 pm »
If I hand carry it to the lab, no case at all.  It sits on my lap during the drive :)
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Offline mzzj

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Re: Transit calibration cases for our precious references.
« Reply #2 on: May 25, 2019, 04:20:16 pm »
Everything that goes to national measurement institute I'll deliver personally. Added expense is small compared to calibration fees and all the doubt about handling issues.

Peli cases are good start but the foam is too stiff for most sensitive (lightweight) equipment like SPRT's
Peli case packed inside 2x2x2 sized cardboard box filled with styrofoam chips or wood shavings is lot better.
Seen also smaller box suspended with sort of rubber bands inside larger plywood crate.
 
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Offline TiN

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Re: Transit calibration cases for our precious references.
« Reply #3 on: May 25, 2019, 06:52:26 pm »
My SPRT (5699) have it's own wooden case. Probably best is to pack that case inside bigger peli case.  :)
Calibration of that thing would be a story for whole another year, it's much more expensive than JJ cal.

What is more challenging - shipping heavy calibrators like 5720A to the labs. You cannot carry these on the lap like CalMachine suggests.
Fluke's 5520A transit case looks like SKB Rack series. 4U one , deep enough for 5720A ain't cheap though :(.
« Last Edit: May 25, 2019, 07:34:41 pm by TiN »
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Offline 3roomlab

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Re: Transit calibration cases for our precious references.
« Reply #4 on: May 25, 2019, 08:42:23 pm »
there are "sprung" racks, 19inch on wheels
there isnt much choices on design
they are lousy in water ingress, you need to saran wrap the whole thing
but all of these mobile products are very lousy, knobs still get rattled out
you really need something with air/pneumatic wheels, not solid rubber. with solid rubber, the whole box vibrates with shitty ground undulations.
you could try custom box shops, but likely none uses pneumatic wheels.
DIY is a good idea, but wood is going to suck at total transport weight.
« Last Edit: May 25, 2019, 08:56:28 pm by 3roomlab »
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Offline HighVoltage

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Re: Transit calibration cases for our precious references.
« Reply #5 on: May 26, 2019, 09:49:52 am »
Nice info, TiN!

Is there a good transport case for the 3458A?

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Offline mzzj

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Re: Transit calibration cases for our precious references.
« Reply #6 on: May 26, 2019, 01:39:23 pm »
My SPRT (5699) have it's own wooden case. Probably best is to pack that case inside bigger peli case.  :)
Calibration of that thing would be a story for whole another year, it's much more expensive than JJ cal.

Yup, expensive to calibrate and so easy to break. Shocked SPRT can measure ok-ish on water triple point but go haywire at other temps. 
Buying a second-hand SPRT would be huge lottery compared to DMM's or voltage references  :-// Would never even consider buying one from equipment dealers, directly from another cal lab just maybe..
Fluke/Hart models like the 5699 appear to be slightly more robust than some others but still "if you lay it on the table and it makes a sound you knock it too hard"
« Last Edit: May 26, 2019, 01:41:27 pm by mzzj »
 

Offline kj7e

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Offline 3roomlab

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Re: Transit calibration cases for our precious references.
« Reply #8 on: May 29, 2019, 05:34:41 pm »
Everything that goes to national measurement institute I'll deliver personally. Added expense is small compared to calibration fees and all the doubt about handling issues.

Peli cases are good start but the foam is too stiff for most sensitive (lightweight) equipment like SPRT's
Peli case packed inside 2x2x2 sized cardboard box filled with styrofoam chips or wood shavings is lot better.
Seen also smaller box suspended with sort of rubber bands inside larger plywood crate.

exactly what you said about the rubberband
I encountered some expensive special utility lamps, and they are shipped suspended in a box. its marvelous !
true-vision, true-decibel, true-4k, true-HD, true-color, true-binary, true-story, true-volt, true-rms, true-ohm, true-lumen, true-ampere, real-vintage, real-voice, real-human, real-statistics, real-noise ... can you tell what is real bull shit?
 

Online beanflying

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Re: Transit calibration cases for our precious references.
« Reply #9 on: June 13, 2019, 12:33:29 pm »
My SPRT (5699) have it's own wooden case. Probably best is to pack that case inside bigger peli case.  :)
Calibration of that thing would be a story for whole another year, it's much more expensive than JJ cal.

Yup, expensive to calibrate and so easy to break. Shocked SPRT can measure ok-ish on water triple point but go haywire at other temps. 
Buying a second-hand SPRT would be huge lottery compared to DMM's or voltage references  :-// Would never even consider buying one from equipment dealers, directly from another cal lab just maybe..
Fluke/Hart models like the 5699 appear to be slightly more robust than some others but still "if you lay it on the table and it makes a sound you knock it too hard"

Todays Random idea for my recent Fluke 5616 PRT from HighVoltage is a 3D printed Coffin for the pointy end. Still needs to go in padding for travel but for casual protection on the bench should do the trick for the occasional bump.

Two piece for the probe end for easier production. Split top section to go over the cable then screw onto the lower section to keep the probe in place. Still printing.....

STL's in the Zip file temporarily removed found a problem. The ID of and M11 female thread is  :palm:

« Last Edit: June 13, 2019, 01:18:05 pm by beanflying »
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Online beanflying

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Re: Transit calibration cases for our precious references.
« Reply #10 on: June 16, 2019, 01:47:20 am »
Try that again  :-[ Measure TWICE print once  :palm:

While I was at it I added a loop to keep a Velcro wrap in place on the top section for the cable management. Works well but I might for extra shock protection make another barrel with a foam or internal rubber sleeve yet.

In the Zip file if anyone can use it (or mod for your own PRT) is the Fusion 360 files and the STL's. Middle and top sections should be printed with a raft to keep them in place otherwise pick you normal settings without supports.
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Offline TiN

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Re: Transit calibration cases for our precious references.
« Reply #11 on: June 16, 2019, 06:30:35 am »
That is small PRT :)

Meanwhile Fluke 732 and SR104 made it all safely back from NML calibration. Busy times, transferring sub-ppm Volt and Ohm ASAP  :scared:.

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Online beanflying

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Re: Transit calibration cases for our precious references.
« Reply #12 on: June 16, 2019, 08:19:44 am »
I am sure there is something about it's not the size but how you use it but we shouldn't go there ;)

When I sent my couple of 6 1/2 digit meter off to Keysight recently I went with cardboard and recut EPP foam inner. Providing you stop movement of the contents Cardboard us still a great product with a bit of distance to the items. A few mates of mine have used Cardboard shipping composite R/C Gliders on planes with no issues that way heading to world championships and my 2m ABS custom box did the job for me.

Cool Cal Lab pic too :-+
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