Peek inside 53-year old voltage standard
Published: 19 September 2021 A quick teardown of Weston-cell based heated voltage standard from Guildline.
Nanovolt design challenge : Build your own open-source nanovolt-grade DCV meter…
Published: 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
Published: 16 August 2021 Review and experiments with ultra-precision direct-current comparator bridge.
HP/Agilent 66** series system DC power supplies
Published: 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
Published: 21 February 2021 Low-cost precision thermal/environmental chamber design and build worklog.
Tale 2 : eBay LTZ1000A reference modules and caveats
Modification for Fluke 8508A DMM, DIY Option 001
Published: 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
Published: 13 December 2020 Experiments for calibrating HP/Agilent 34401A for AC Voltage and Fluke 510A standard review/mods.
Modification for guarded current output in Fluke 5720A
Published: 27 September 2020 Modification for additional guarded output capability in Fluke 5700A/5720A front panel inteface.
Fluke 742A resistance standards
Published: 15 September 2020 Benchmarks and test results of various Fluke 742A resistance standards.
ESI SR1010, SR1030 and SR1050 series resistance ratio transfer standards
Published: 06 September 2020 Benchmarks, teardowns and performance of ESI SR1010, SR1030 and SR1050 hammon dividers.
Acopian AC-DC Linear power supply
Published: 01 August 2020 Review and tests of Acopian Gold series A24MT350 +24V 3.5A linear DC power supply
EIP/PhaseMatrix 578B Locking microwave counter
Published: 01 August 2020 Review and tests of EIP / PhaseMatrix 578B 10Hz - 110 GHz counter with locking capability
High-current resistance measurements
Review and tests of Femto HVA low-noise amplifier
Teardown : Fluke Y2022
Teardown : Fluke 7405A-4207 divider module
Wavetek 4953 10A AC/DC precision shunt review