[INDEX] Metrology section quick guide - Page 1
Forum section: electronics / general

author: TiN
author_rank: Super Contributor
timestamp: December 14, 2016, 04:47:51 am
content: Having 7 pages of forums threads in Metrology section is already enough to get less frequently discussions be buried deep down. So I think small index would help newcomers and volt-nuts to navigate to interesting bits more easily.Before you scream "use dat search button", I'd like to clarify, that being a daily reader of Metrology section since it was created from Day 0, yes, I use search, if can remember which keywords to look for, but people who just take occasional lurk, may be lost the threads, missing valueable bits and info.How about the idea of moderated and handpicked threads list, to be of help in such cases. I also took a brave pill and linked relevant threads from other EEVBlog forum sections, if they have relevant info.Each section is grouped around discussed matter/field or specific instrument/gear.If you feel I missed something, let me know to add after review. If this thread is useful, perhaps Dave can make it sticky for all to see.Linear LTZ1000/LTZ1000AUltra Precision Reference LTZ1000LTZ1000A fairy-tale, or the story of little jumper.Selection criteria for the OPAMPs in the LTZ1000A schLTZ1000 Supply7 volt DC standard based on the HP/Agilent 03458-66509 LTZ1000 reference boardMotorola SZA263 / Linear LTFLUThe LTFLU (aka SZA263) reference zener diode circuitResistor stability in Voltage Reference amps - a way around?LM399 and compatible referencesLM399H and LM399AH differenceTesla MAC199/MAE299/MAB399 and MAC01 : teardown and testsLM399 based 10 V referenceDIY Voltage referencesBuilding your own voltage reference - the JVRUltra Low Noise Reference 2DW232, 2DW233, 2DW23xResistance standardsTeardown: Standard ResistorsFluke 742A-10K and HP3458AGeneral Resistance DAS56AZero Ohm DIY 4-wire standardL&N 4232 Wheatstone bridgeL&N 4385 TeardownPoor man's 1 : 100 resistance transfer standardPrecision binary (R2R) dividerDecade resistance box re-prupose to DIY 10:1 and 100:1 transfer dividerESI SR 1050 100K transfer standard, some inside pictures.Guildline 9730CR oil bath, under the cover+manual&cct.ESI SR1 Standard Resistor Current RatingBU508A's first 10kOhm reference resistor using VPG BMFVishay VHP101 out of tolerance? (or HP 3458A)Zlymex building an ultra-precision high resistance bridgeFine resistance adjustment for standard resistorsL&N 4754 : Teardown and testT.C. measurements on precision resistorsESI Resistance Standard SR1010 and Standard Resistor SR104Kelvin-Varley Dividers and ratio standardsRestoration : Fluke 720A KVD/Ratio standardKVD comparison endeavorDivider calibration artice, anyone have a copy?Strange ESI RV722 for sale on ebayAnyone else built a Hamon Voltage Divider?GenRes DV-4107D KVDTeardown:Julie Reasearch Labs VDR106 KVDHP/Agilent/Keysight 3458A 8.5-digit DMMRepair : Old rusty HP 3458ARANT - Buying a 3458A why is that hard?3458A IssuesSteve's 3458A repair threadRepair and experiments thread: HP 3458A U23458A calibration data backup and restore?Repair : Yes, another little 3458A repair log.New (to me) HP3458A reference3458A ACAL 0 questionWhat is the next best ratio measurement device after the 3458A?3458A autozero on/off for uV measurementsA very cheap 3458AReplacing the Snaphat ZeroPower batteries in a KS/Agilent 3458A DMM3458A's Current shunts/resistance current source tempco studyHP 3458A 8.5 digit calibration questionsAgilent 3458A GPIB Data Aquisition software and options ?Stop 3458A sold in EU.HP 3458A 40K reference issues3458A software setupProgram by font keys the HP 3458A for a rolling average (mean)HP 3458A input relaysInter-distance of binding posts on 3458A3458A worklog3458A Elantec obsolescenceFluke 5700A/5720A/5730A threadsFluke 5700 capacitors power supply listhow repairable is an 5700?Rebuild of "HULK3" Fluke 5720A calibrator rig build out of random broken boards.How does 2-wire-compensation work on Fluke 5700 calibrator?Fluke 5700A VFD displaysFluke 5700A resistance troubleshootingFluke 5700A repair threadNanovolt instruments and projectszLymex's DIY noise meter + preamp build, DIY low frequency noise meter and some measurement result of voltage referencesTinsley 6050 Nanovoltmeter (little bit unsual)Keithley 148 NanovoltmeterKeithley 182-M teardownEM Electronics Model N11 DC NanovoltmeterKeithley 2001 DVM factory modifications to work with a K1801 nanovolt preampCalibrators-relatedFluke 332A adjustment/verificationFluke 5440B warmup timeFluke 5440B ProblemsIs the Fluke 5440B really an artifact CAL instrument?Teardown and study of Fluke 5700A Calibrator [56K warning!]Datron 4708 cant be calibrated error 4Datron 4950 Multifunction Transfer Standard systemReplacing relays in a 5440B or 5440B/AFAdjusting Quadrature Level on a 5200ATeardown/repair : Time Electronics 9823 10ppm/year AC-DC calibratorOriginal price of Fluke 5440B in the 80sFluke 5200A - requirements for 5205AAC equivalent for the 5440B/AFHow does 2-wire-compensation work on Fluke 5700 calibrator?Datron/Wavetek 4600 transconductance amplifierKeithley 263 Calibrator/SourceTime/frequency standardsSymmetricom GPSDO / 10MHz reference OEM modulesEconomical option for precision frequency reference, Lucent RFTG-uNEC GPSDO module EPSON TOYOCOM TCO-6920N 10MHZTime standards: How accurate is GPS modules?32.768hKh tuning fork cut quartz crystal - stability questionNo luck on my first attempt at acquiring a cesium frequency standardBG7TBL GPSDO master referenceRepair : TEMEX/SpectraTime LPFRS/LPRO 10MHz Rb generatorAC voltage/current meters and standardsRestoration : Wavetek 4920/4920M teardown, repair and usage cases, come join!Commercial DC Voltage standardsZlymex overview and teardowns: Voltage StandardsEDC 520A repairTeardown: Valhalla 2707A DC/current standardFluke 341A DC voltage calibratorIs my "new" Fluke 731B stabilizing or going crazy ?Teardown : HP 3455A reference module 11177B-01723Fluke 731B repair and modificationsWavetek/Fluke 7004 systemFluke 732A/732B/734AFluke 732B repair.Fluke 732A excessive driftBarometric pressure influence fluke 732B accuracyWanted - Fluke 732B DC StandardFluke 732B DC Standard TeardownThe Current Cost of Chasing PPM's (Fluke 732b price list)Datron 4910/4911/4912Datron 4910 PWM-SchematicsLooking for a Datron 4910Repair Datron/Wavetek 4910 Voltage StandardWeston chemical standard cellsDr.Frank's #1000: My (hi)story of the Weston cell, of the Volt, and of being a volt-nutsCropico ESC1 electronic standard cell / a look insideWeston Standard CellMuirhead STD and REF cells - all catalogue info uploaded !

author: TiN
author_rank: Super Contributor
timestamp: December 14, 2016, 04:49:25 am
content: Low current/high-impedance measurementsMeasuring nanoamps and below like a NinjaHighVoltage's TRIAX cable shielded box projectDMM/standards comparisonsDMM Noise comparison testing7.5 digit bench DMMs comparison8.5 digit DMMsRigol DM3068 vs Agilent 34461AComparing calibration (DC 10V) on Fluke/Keysight/Keithley bench DMM'sDatalogging/metrology-related software and analysisRaspberry Pi image from Phil supporting NI GPIB USB, Agilent GPIB USB and HPAK E5810 VXI controllers (2021)Raspberry Pi2/3 logging platform for VoltnutsRF Scientific GPIB Logger v 1.0Flood of new Agilent 82357B GPIB-USB adaptors on eBay the real deal?Understanding Allan Deviation measurementsCabling, scanners and interfacing in metrologyLow thermal EMF binding posts - a quality warningRecommended DMM banana TEST leads for Metrology applicationsLow thermal EMF scanner and ordinary non-latching relaysMeasurements on emf-error of switchesHow a precision DMM have a high input impedance in the Gohm Rang?DIY Low EMF cable and connectorsTeardown : Data Proof 160ABinding posts/banana sockets cleaning on DMMs/metrology lab gear?Other metersNew Agilent 34461A 6.5 Digit Bench MultimeterKeysight 34465A (6.5 digit) and 34470A (7.5 dight) share same hardware?Keysight's new 34465A (6.5 digit) and 34470A (7.5 digit) bench multimetersDatron/Wavetek 1271Datron 1071 repairDatron 1281 Internal source Calibration Error codes 2202, 2192, & 2162Datron Wavetek 1271 1281 self test question + details of successful repairTeardown : Fluke 845A/AB/AR nullmeter/HZ voltmeter tweaks and mods (and repairs)Keithley 2002 8.5 digit DMM review and teardownKeithley 2002 from 1994, repair good ol' cap leaks destuction derbyRestoration glory of Keithley 2001 DMMTeardown : Keithley 2001-TCSCAN CJC card for K2000/2001/2002Null voltmetersKeithley DMM7510 7.5-Digit Multimeter Review, Teardown & ExperimentsTektronix DMM 4050 shows exceptionally good performanceSolartron 7071 / 7081 last digit is jumping all over the placeUncertainty analysis and metrology statistics / methodsUncertainty Budgets and Decision Rules

author: TiN
author_rank: Super Contributor
timestamp: December 14, 2016, 04:52:26 am
content: RSVD for future updates.

author: EEVblog
author_rank: Unknown
timestamp: December 14, 2016, 05:25:41 am
content: I've set this topic as a sticky.Can't put all those threads as stickies obviously, so this nice list will be do the job

author: edpalmer42
author_rank: Super Contributor
timestamp: December 14, 2016, 05:56:06 am
content: TiN,Since there's a 20 KB limit per message, you might want to make sure that there's room in each message so that new threads can be added to the relevant sections.

author: CalMachine
author_rank: Frequent Contributor
timestamp: December 14, 2016, 01:50:35 pm
content: I love you TiN!!Thank you so much for all your hard work and effort! This well help me a lot in the next coming year or 2 as I am starting to plan out ways I want to try to improve the multislope ADC topology. I also want to see if I can implement those new Chinese 2DW23X zener references somehow.I recently started watching a few of your videos on youtube, and I am extremely impressed.

author: mimmus78
author_rank: Unknown
timestamp: December 14, 2016, 03:31:02 pm
content: Well yes I love you are the right words. Really impressive work to organise all this stuff.Inviato dal mio Nexus 6P utilizzando Tapatalk

author: edpalmer42
author_rank: Super Contributor
timestamp: December 18, 2016, 02:52:28 am
content: These threads should be added to the Time & Frequency topic:https://www.eevblog.com/forum/projects/a-look-at-my-symmetricom-gpsdo-(ocxo-furuno-receiver)/https://www.eevblog.com/forum/beginners/does-anyone-recognize-this-board-is-it-a-gpsdo/- NEC GPSDO with an Epson Toyocom TC-6920N OCXO.https://www.eevblog.com/forum/testgear/economical-option-for-precision-frequency-reference/- Lucent RFTG-u GPSDO (mostly)https://www.eevblog.com/forum/beginners/help-me-understand-allan-deviation-measurements/

author: MegaVolt
author_rank: Frequent Contributor
timestamp: September 02, 2019, 10:15:29 am
content: "Selection criteria for the OPAMPs in the LTZ1000A sch" invalid link.I could not find this topic myself through a search

author: cnt
author_rank: Contributor
timestamp: December 03, 2021, 05:35:07 am
content: "poor man's 1:100 resistance transfer standard" link is broken. it should be: (the ' in the url should be a _)https://www.eevblog.com/forum/metrology/poor-man_s-1-100-resistance-transfer-standard/

author: TiN
author_rank: Super Contributor
timestamp: December 03, 2021, 06:08:44 am
content: Thanks, fixed.

author: RikV
author_rank: Regular Contributor
timestamp: June 14, 2022, 08:56:47 pm
content: Could ADR1399 be added to LM399 links?Siglent meters?Thanks for this great help!What about ADR1000?

author: Rax
author_rank: Super Contributor
timestamp: January 28, 2024, 04:33:46 pm
content: TiN - suggesting a couple of threads which I believe belong in your repository:Linear LTZ1000/LTZ1000A:https://www.eevblog.com/forum/metrology/agilent-keysight-03458-66509-dcv-reference-pca-for-3458a/.It's a thread that puts good effort in compacting and boiling down essential information for building a simple LTZ1000/A 10V reference kit. The humongous equivalent thread is very difficult to navigate.Other meters:https://www.eevblog.com/forum/metrology/prema-6048-teardown/.By far the best thread on this meter, including thorough analysis of its performance, issues (INL!), and even modifications intended to cure its design issues. A lot of good work put in this long-ish thread.