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1
K5/6 - Physical Dimensional / Re: White Papers on SPRT Stem Correction Error
« Last post by Mr M. on Yesterday at 17:42:49 »
From basic to most useful.
http://download.flukecal.com/pub/literature/4137185A_w.pdf
https://www.isotech.co.uk/assets/uploads/Technical%20Articles/Temperature%20Calibration-Depths%20of%20Immersion.pdf
https://www.govinfo.gov/content/pkg/GOVPUB-C13-4f56caf02b22c4ad8773a6b51df0c78a/pdf/GOVPUB-C13-4f56caf02b22c4ad8773a6b51df0c78a.pdf
I really like the discussion in the last pub on page 22 for Table 9, the vertical temperature differences over the length of the re-entrant well of the fixed-point cells. You can try this with a TPW cell but since the ambient to TPW difference is relatively small it may be difficult to see.
Hope some of this helps, good luck.
2
K5/6 - Physical Dimensional / White Papers on SPRT Stem Correction Error
« Last post by Hawaii596 on Yesterday at 13:19:16 »
Anyone know of good white papers on SPRT stem correction error?  I need good details on tests/evaluation  and including them in uncertainty budgets.
3
Good morning everyone. I'm trying to reprogram Keysight E4412 Power Sensors and am having trouble. We use SureCal here and have had some issues with the way it seems to be programming the EEPROM. What software does everyone here use? I just downloaded the latest AF NextGen software as well to try it out but I don't believe NextGen programs them (unless I'm wrong). Thanks!
4
Jobs Forum / PMEL Electonics Technician 1- Hill AFB, Utah
« Last post by WDavis on 08-15-2019 -- 02:05:51 »
As a subsidiary of Goldbelt, Inc., Goldbelt Falcon is an Alaska Native Corporation providing scientific, engineering and technical services tailored to the defense, security, aerospace and environmental markets. Goldbelt Falcon is in search of an Electronics Technician I located at Hill AFB, Utah.

The Electronics Maintenance Technician I is responsible for performing a variety of basic technical knowledge to perform simple or routine tasks by following detailed instructions.  This position requires repairing electronic equipment, basic level knowledge of torque and force applications, basic flow application knowledge, and taking test readings using common metrology instruments. 
 
Responsibilities include:   • Maintain, repair, and calibrate physical/dimensional and basic electronics test measurement and diagnostic equipment (TMDE) and laboratory standards with experience in all technical areas. • Possess ability to read and understand schematic and wiring diagrams. • Perform general maintenance and overhaul procedures. • Basic knowledge of electrical principles and safety with application of energized equipment. • Basic knowledge of pressure principles, understanding of units of measure, and application of pressure for direct readout. • Maintain, repair, and calibrate flow test measurement and diagnostic equipment (TMDE) and laboratory standards technical application areas. • Maintain and calibrate temperature and pressure test measurement and diagnostic equipment (TMDE) and laboratory standards in technical application areas. • Basic knowledge of torque and force application and principles.  • Capture test readings using common instruments such as micrometers, calipers, faro arms, optical comparators, load cells, dynamometer, liquid flow meters, torque ranges up to 10,000 FT/LBS, and use of automated software associated to testing and calibration • Replace mechanical components and wiring circuits. • Ensure work is reviewed for compliance with accepted practices. • Operate under close supervision and achieve technical guidance, as required, from supervisor or higherlevel technician. • Provide technical training to all personnel in lab operations, calibration process, schematic and technical drawing analysis, quality processes, and all other functions of the technician’s job description. • Performs other assigned duties from supervision and Management as required.
 
Required Skills/Experience:    • Proven record of honesty and integrity in all relationships. • High School diploma or equivalent. • Minimum of zero (0) to two (2) years technical experience. • Basic knowledge of electrical components, electronics, electromechanical, mechanical, physics, optics, and thermal principles as they apply to metrology practices. • Experience with maintenance data collections systems, supply, transportation, and electronic mail is required. • Previous PMEL/Metrology experience desired.
 
• Good organizational skills, with the ability to establish priorities. • Excellent communication skills, both verbal and written. • Will be required to obtain a clearance and background check for system access.

Please apply at https://chu.tbe.taleo.net/chu04/ats/careers/v2/viewRequisition?org=GOLD&cws=37&rid=8486 if you are interested in this position.
5
K5/6 - Physical Dimensional / Re: Volumetrics brand Mass Flowmeter Specs
« Last post by ZZ on 08-14-2019 -- 05:37:53 »
Thanks for the help!
6
K3/4 - Waveform Analysis & RF Generation / Re: Frequency Standard
« Last post by briansalomon on 08-08-2019 -- 18:24:04 »
I'd love to have that 910R.

In case anyone's interested, here's a link to NIST. Helpful if you're used to relying on stand-alone frequency standards.

https://www.nist.gov/publications/use-gps-disciplined-oscillators-primary-frequency-standards-calibration-and-metrology

I rather have the Fluke but did find an EndRun Meridian II GPS time base that has some quality documentation with it. NIST did a comparison of this model to the USNO.

I have noticed that fairly low end (~ $1000) GPS frequency standards appear to be widely accepted.
7
K3/4 - Waveform Analysis & RF Generation / Re: Frequency Standard
« Last post by silv3rstr3 on 08-06-2019 -- 14:48:28 »
I checked out the specifications to see what I'm going to be working with in the near future.  Attached is a PDF file of just the specification page in the 910R datasheet.
8
K3/4 - Waveform Analysis & RF Generation / Re: Frequency Standard
« Last post by silv3rstr3 on 08-05-2019 -- 23:19:59 »
I'm still utilizing the Datum 9390-6000 and it's still locking on to 6-8 SV's everyday!  Good manufacturing.  We recently bought the Fluke 910R to replace the Datum. Still waiting on the maintenance department to run the cable and replace the antenna with Fluke's.  I think the 910R meets the specifications you require. It's a GPS that can also be used as a stand alone Rubidium standard that's pretty accurate itself. 

I find it very interesting how the cesium atomic resonance occurs and how stable cesium 133 works with the atomic clock.  I saw a picture of an old atomic clock in a huge laboratory.  It was pretty massive. It's incredible that every GPS satellite in space presently contains four atomic clocks!!

I calibrate and repair a bunch of Spirent (GNSS) GPS Simulators here that peak at 1575.42MHz.  They actually simulate satellite constellations. These simulators cost around $600,000! It's crazy to me to be working on a piece of equipment that is worth a massive house depending on where you live!       
9
K5/6 - Physical Dimensional / Re: Volumetrics brand Mass Flowmeter Specs
« Last post by silv3rstr3 on 08-05-2019 -- 15:56:18 »
I tried to find cal procedure but didn't any have luck either.  I'm attaching a general flow meter calibration procedure.  Maybe  the methodology can help you remember this or maybe it's time to upgrade!!
10
K3/4 - Waveform Analysis & RF Generation / Frequency Standard
« Last post by briansalomon on 08-02-2019 -- 22:27:55 »
I need to replace an old HP 5061A Cesium frequency standard.

I'd like to maintain a the stability of that unit ( 7X10-12)

What are you using that you like?
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