xDevs.com documents repository is online again
Created: 10 November 2023
Update about xDevs T&M documentation repository availability and access.
USAC FX repairs Q4'2023
Created: 21 October 2023
Minor repair and recalibration of the USA Cal Club FX 10V reference
Calibration Festival / RepairFest 2023
Created: 04 August 2023
Highlights report of calibration / equipment repair meetup 2023 in USA.
Mystery Keithley modular voltmeter KM-VM design review
Created: 15 June 2023
Teardown and experiments with interesting Keithley KM-VM-02 head-less milli(nano?)voltmeter for system integration application.
Low thermal post conversion for Keithley 2002 DMM
Created: 23 April 2023
Keithley 2002 8.5-digit DMM experimental modification with Low Thermal 5-way posts
Very low-cost resistance transfer standard concept build
Created: 05 February 2023
Experiment with very low cost resistance transfer for international comparison.
Calibration tests for Round 3 USA Cal Club
Created: 17 November 2022
Calibration of the USA Cal Club 10V, 10 kΩ references and long-scale Keithley 2002 DMM
Pimping a Prema 5017 7.5-digit DMM or can we?
Created: 30 May 2022
DMM Modification experiment with new Analog Devices ADR1399KHZ low-noise voltage reference
ESI Standard Capacitor teardown
Created: 30 May 2022
Look inside of old ESI SC10 and SC1000 standard capacitors
Power supplies for voltage references, Part 1
Created: 28 March 2022
Practical designs and theory behind high-isolation DC/DC power converters for metrology applications.
Teardown and tests of Hittite 10 MHz - 20 GHz signal source
Created: 23 March 2022
Tests, teardown and applications for Hittite HMC-T2220 programmable RF source
LTZ1000CH voltage reference - A simplified version of Wavetek/Fluke 7000
Created: 12 March 2022
Alternative design of solid-state LTZ1000 DC voltage standard, inspired by Wavetek 7000 reference circuit.
DIY 10kΩ reference resistor
Created: 21 February 2022
Precision DIY 10000 Ohm resistance standard build with temperature compensation network.
Mounting D-shaped circular connectors on panels
Created: 28 November 2021
Methods and hardware to make D-shaped holes for binding posts and similar connectors.
Peek inside 53-year old wston cell voltage standard
Created: 19 September 2021
A quick teardown of Weston-cell based heated voltage standard from Guildline.
ADI ADR1000, new ultra-low noise zener voltage reference
Created: 17 September 2021
Today Analog Devices provided way for public and volt-nuts to order brand-new best in class voltage reference - ADR1000
Nanovolt design challenge : Build your own open-source nanovolt-grade DCV meter…
Created: 02 September 2021
Join the friendly contest challenge with your open-hardware nanovoltmeter project and a chance to get unique 10.00000 VDC xDevs.com QVR-A reference.
Guildline 6675A/6623 resistance bridge system and experiments
Created: 16 August 2021
Review and experiments with ultra-precision direct-current comparator bridge.
LakeShore 370 AC Resistance bridge for cryogenics thermometry
Created: 07 May 2021
Cryogenic applications AC resistance/thermometer teardown and review.
HP/Agilent 66** series system DC power supplies
Created: 29 March 2021
Overview and benchmarks of 66**A series precision linear DC power supplies from HP and Agilent.
Large DIY environmental chamber for DMM/T&M gear testing
Created: 21 February 2021
Low-cost precision thermal/environmental chamber design and build worklog.
Tale 2 : eBay LTZ1000A reference modules and caveats
Created: 23 December 2020
Recent experience with buying two LTZ1000A-based modules from eBay.
Modification for Fluke 8508A DMM, DIY Option 001
Created: 23 December 2020
Adding rear 5-way terminals to 8½-digit Fluke 8508A DMM for ratiometric and scanner functionality.
Fluke 510A AC standard, or how to calibrate HP/Agilent 34401A for ACV ranges
Created: 13 December 2020
Experiments for calibrating HP/Agilent 34401A for AC Voltage and Fluke 510A standard review/mods.
What's new?
- xDevs.com documents repository is online again
- USAC FX repairs Q4'2023
- Calibration Festival / RepairFest 2023
- Mystery Keithley modular voltmeter KM-VM design review
- Low thermal post conversion for Keithley 2002 DMM
- Very low-cost resistance transfer standard concept build
- Calibration tests for Round 3 USA Cal Club
- Pimping a Prema 5017 7.5-digit DMM or can we?