Author Topic: My TRIAX cable shielded box project for Keithley Instruments  (Read 26512 times)

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Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #125 on: April 30, 2020, 06:37:07 am »
I've started build big TEC-box for my small Triax-boxes.
Awaiting Arroyo 5305.....







« Last Edit: April 30, 2020, 06:40:54 am by shodan@micron »
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Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #126 on: May 03, 2020, 12:37:05 am »
Triax-box into TEC-box
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I'm need tank of Bose-Einstein condensate....
 

Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #127 on: May 26, 2020, 02:27:16 pm »
Arroyo TECSource 5305 is arrived. I've little bit repair & service it. (dust clean, replace VFD, update FW).

Now my "TEC-TRIAX-Keysight-Keithley low current box"  >:D is accomplished  8)







SHOWTIME!

TCR measuring of old fashion 1T USSR resistor in +10°C...+45°C range.
КВМ 1000ГОм 10% (KVM 1000G 10%) MFD:1977 year.


DUT powered by Keithley 2450 SMU, voltage is fixed at 100V. DUT current measured by Keysight B2985A.


Blue line - Ambient temperature TI TMP117
Yellow line - PID-loop temperature Epcos B57703M0103G000 (placed directly on TRIAX-box metall case)
Green line - DUT air temperature E+E Elektronik EE07-PFT (placed into TRIAX-box)
Red line - DUT humidity air E+E Elektronik EE07-PFT (placed into TRIAX-box)
Purple line - DUT current

Measure data:
Temperature(C)Current(pA)P-P noise(ppm)
45,05102,003761
24,98103,987648
9,94105,2466540

Result: TCR is +888 ppm/°C (+10°C...+45°C range)

Also, as you can see, when temperature is drop it is also dropped P-P noise.
Dear HighVoltage, i'm sooooo sorry, but i can't answer to your question without liquid nitrogen :) :) :) :) (I am ashamed... now my measurements is very noisy ....)

Soon i begin tested 1T Mini-MOX... please wait...
« Last Edit: June 12, 2020, 09:47:59 am by shodan@micron »
My lab in Instagram. LXI Instruments Data Logger apps.
I'm need tank of Bose-Einstein condensate....
 

Offline TiN

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #128 on: May 27, 2020, 03:40:32 am »
My eyes all broken trying to count zeroes on current scale :) Just use engineering notation, readers will say thank you..
Or you could recalculate resistance already for the graph.

Quote
DUT powered by Keithley 2450 SMU
:-DMM
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Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #129 on: May 27, 2020, 03:44:48 am »
My eyes all broken
changing output just from thinking about it  :palm:

I hope, in future you are show to us more detailed data. :palm:
« Last Edit: May 27, 2020, 03:54:58 am by shodan@micron »
My lab in Instagram. LXI Instruments Data Logger apps.
I'm need tank of Bose-Einstein condensate....
 

Offline TiN

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #130 on: May 27, 2020, 04:56:55 am »
All good deeds are punishable, I suppose. 
Suggesting better representation got me to ignore list, that's new  :-+
Especially funny how shodan@micron didn't mind to reuse my graph code script though.
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Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #131 on: May 27, 2020, 05:33:26 am »
I copyleft to you original idea, but now is not yours script, it is have many changed.
Feel the difference.

Unfortunately, i do not have time to fix all yous bug and code of d3.js script, but i hope i fix it...

Suggesting better representation got me to ignore list, that's new  :-+
Yup!
You do not provide data, I do not see the utility in such messages in technical thread.
« Last Edit: May 27, 2020, 05:35:03 am by shodan@micron »
My lab in Instagram. LXI Instruments Data Logger apps.
I'm need tank of Bose-Einstein condensate....
 

Offline coppercone2

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #132 on: May 27, 2020, 06:06:36 am »
All good deeds are punishable, I suppose. 
Suggesting better representation got me to ignore list, that's new  :-+
Especially funny how shodan@micron didn't mind to reuse my graph code script though.

picking a fight over nothing after code was modified is suspect, not to mention pointing out incompetence, as if it was not initially useful

i think someone here has some financial aspirations, sounds like co worker
« Last Edit: May 27, 2020, 06:11:46 am by coppercone2 »
 

Online HighVoltage

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #133 on: May 27, 2020, 08:14:05 am »
Nice setup, shodan@micron.

You might want to use pure copper crocodile clips

There are 3 kinds of people in this world, those who can count and those who can not.
 
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Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #134 on: May 27, 2020, 08:15:58 am »
think someone here has some financial aspirations
Nope, i don't think that.
My project share by GPLv3 license, it is absolutely free. All my soft and lab i use just for hobby and fun. Unfortunately i do not have many time for it, but sometimes i can share my time for that...
My lab in Instagram. LXI Instruments Data Logger apps.
I'm need tank of Bose-Einstein condensate....
 

Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #135 on: May 27, 2020, 12:11:22 pm »
You might want to use pure copper crocodile clips
I try that.

Let's continue!

DUT: Ohmitte Mini-MOX 1T resistor in +10°C...+45°C range.

DUT powered by Keithley 2450 SMU, voltage is fixed at 100V, current measured by Keysight B2985A.


Blue line - Ambient temperature TI TMP117
Yellow line - PID-loop temperature Epcos B57703M0103G000 (placed directly on TRIAX-box metall case)
Green line - DUT air temperature E+E Elektronik EE07-PFT (placed into TRIAX-box)
Red line - DUT humidity air E+E Elektronik EE07-PFT (placed into TRIAX-box)
Purple line - DUT current (TiN eyes saver mode - enabled)

Measure data:
Temperature(°C)Current(pA)P-P noise(ppm)
45,0798,253192
24,9897,8079187
9,9397,612162

Result: TCR is -186 ppm/°C (+10°C...+45°C range) Looks like littlebit not a linear TCR curve.
TEC it's good tools, earlier i think TCR is about 1000ppm/°C but i was wrong :palm:, now i can find true values and get much stable readings :popcorn:

Stability data at 10°C:
« Last Edit: June 12, 2020, 09:37:55 am by shodan@micron »
My lab in Instagram. LXI Instruments Data Logger apps.
I'm need tank of Bose-Einstein condensate....
 

Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #136 on: June 12, 2020, 04:25:40 pm »
My extremely small and high value resistors boxes, for express check electrometer on all ranges from 200 nA to 2 pA:
....
BOM:
* Ohmite Mini-Mox MOX112523100AK - 1T.
.....
Okay! 1 year past!
I repeat measure and detect a drift is only -69 ppm/year.  :o
Now that reference prepared for transfer to another ampernuts.  :-DMM
« Last Edit: June 12, 2020, 09:23:22 pm by shodan@micron »
My lab in Instagram. LXI Instruments Data Logger apps.
I'm need tank of Bose-Einstein condensate....
 

Offline bsw_m

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #137 on: October 20, 2020, 09:22:54 am »
Project 1

OK, I am looking for improvements and hints of what to change or do differently for the next project.

Thanks for any suggestions.

Please consider the following.
Any insulating material can generates and stores a charge. Stacking PTFE sheets in an ultra-low current meter box can have many undesirable effects.
In my humble opinion, the measuring box for ultra-low currents should be all-metal without additional insulating materials.
 
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Offline shodan@micron

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Re: My TRIAX cable shielded box project for Keithley Instruments
« Reply #138 on: October 20, 2020, 09:29:13 am »
 Yup! I'm confirm that.

I'm remove from my BOX everything: PTFE, cables, all insulators, paint, guard's.... totally! Just bare metal and air.
Settling time of new box dramatically drop down. All parasitic charges are desapear.
Latter i show that....
« Last Edit: October 20, 2020, 09:32:12 am by shodan@micron »
My lab in Instagram. LXI Instruments Data Logger apps.
I'm need tank of Bose-Einstein condensate....
 


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