Metrology

• Metrology

  Everything metrology & Calibration related. This is where the Voltnuts hang out.

• Topics

• Looking to check my 732A

  Started by perdrix on 03 Sep, 2026 16:27
  Last post by perdrix on 07 Sep, 2026 06:27

  Views: 1666, Replies: 4

• HP 34401A hacks and upgrades

  Started by cellularmitosis on 26 Apr, 2018 00:48
  Last post by GigaJoe on 06 Sep, 2026 23:29

  Views: 69737, Replies: 291

• Fluke and Brymen seem to have different ideas about LoZ implementation

  Started by cedd on 10 Oct, 2024 22:35
  Last post by hatte on 06 Sep, 2026 17:36

  Views: 4668, Replies: 8

• Symmetricom S200 Teardown/upgrade to S250

  Started by SoundTech-LG on 05 Oct, 2017 14:52
  Last post by chinahaoting on 06 Sep, 2026 05:33

  Views: 126624, Replies: 214

• Valhalla 2724A Programmable Resistance Standard

  Started by branadic on 03 Jun, 2025 19:54
  Last post by TERRA Operative on 04 Sep, 2026 14:45

  Views: 12443, Replies: 36

• ADCMT 7480T 8.5 digit multimeter

  Started by TheSteve on 04 Jan, 2018 05:13
  Last post by bsw_m on 04 Sep, 2026 13:50

  Views: 27596, Replies: 47

• Teardown:Julie Reasearch Labs VDR106 KVD

  Started by Pipelie on 01 Jan, 2017 08:24
  Last post by Robert763 on 02 Sep, 2026 16:34

  Views: 12974, Replies: 16

• Replacing SLA batteries in Fluke 732A with LiFePO4

  Started by perdrix on 31 Aug, 2026 12:19
  Last post by perdrix on 02 Sep, 2026 08:52

  Views: 1865, Replies: 10

• A Trimble 5000A timer by another name?

  Started by foxops on 01 Sep, 2026 04:04
  Last post by foxops on 01 Sep, 2026 22:39

  Views: 1379, Replies: 1

• HP 5065A assembly level service package!

  Started by 5065AGuru on 01 Sep, 2026 20:35

  Views: 1181, Replies: 0

• ADR1399 reference

  Started by branadic on 11 Apr, 2022 09:33
  Last post by dietert1 on 31 Aug, 2026 19:09

  Views: 295295, Replies: 542

• Chinese Metrology accessories list

  Started by PascalNE on 15 May, 2025 22:04
  Last post by PascalNE on 31 Aug, 2026 16:33

  Views: 39689, Replies: 168

• Failure calibrating Fluke 720A

  Started by perdrix on 28 Aug, 2026 10:35
  Last post by bastl_r on 30 Aug, 2026 16:29

  Views: 2079, Replies: 11

• NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed - NOW WRYTECH

  Started by TheDefpom on 27 Aug, 2019 22:07
  Last post by Cyclotron on 29 Aug, 2026 01:56

  Views: 108693, Replies: 189

• "NU180" - A U180 drop-in replacement for the 3458A.

  Started by Zondar on 20 Aug, 2025 21:02
  Last post by Zucca on 27 Aug, 2026 14:30

  Views: 120064, Replies: 960

• Fluke 720A replacement of those 5kOhm trimmers

  Started by perdrix on 26 Aug, 2026 13:37

  Views: 1303, Replies: 0

• Wavetek/Datron/Yokogawa/Fluke 9100 thermocouple adapter

  Started by dcmxx on 26 Aug, 2026 06:03
  Last post by dcmxx on 26 Aug, 2026 07:16

  Views: 1396, Replies: 6

• I bought the very Last Symmetricom SA.22C in the shop!

  Started by Johnny B Good on 24 Jul, 2022 16:58
  Last post by Kwakerman on 25 Aug, 2026 21:29

  Views: 49562, Replies: 82

• DIY "all in one" precision time box

  Started by NiHaoMike on 26 Jul, 2026 02:54
  Last post by citizenrich on 25 Aug, 2026 06:17

  Views: 2593, Replies: 1

• Guildline 6675A repair help

  Started by dcmxx on 19 Jun, 2025 22:50
  Last post by aronake on 24 Aug, 2026 13:12

  Views: 2740, Replies: 6

• INL measurement at ppb level

  Started by MiDi on 17 Aug, 2026 22:08
  Last post by MiDi on 24 Aug, 2026 10:24

  Views: 2379, Replies: 9

• Custom RF cabling questions

  Started by purplxed on 25 Dec, 2024 22:54
  Last post by tooki on 23 Aug, 2026 20:18

  Views: 3597, Replies: 6

• MOVED: Solartron 1260 Analyzer Repair Attempt (Original 1260, not 1260A)

  Started by EngineerTurbo on 22 Aug, 2026 23:28

  Views: 880, Replies: 0

• Raiding a standard lab on surplus gear

  Started by aronake on 25 Jun, 2026 12:08
  Last post by Reemuson on 22 Aug, 2026 03:56

  Views: 11398, Replies: 69

• Just purchased Fluke 45, Ohms need calibrating, 5 ohms when new leads are shortd

  Started by mkinn on 16 Aug, 2026 19:39
  Last post by jfet on 19 Aug, 2026 12:03

  Views: 1651, Replies: 4

• Useful Site

  Started by BigBoss on 19 Aug, 2026 02:07

  Views: 1308, Replies: 0

• Advantest R6581 Service Manual

  Started by Mickle T. on 23 Aug, 2022 15:23
  Last post by dietert1 on 18 Aug, 2026 11:06

  Views: 27352, Replies: 55

• HP 3458A — non-converging rundown, single-slope only: is this faulty U180?

  Started by vf33184 on 11 Jun, 2026 22:49
  Last post by vf33184 on 17 Aug, 2026 22:15

  Views: 7370, Replies: 36

• Fluke 515A Portable Calibrator - internals pictures, partial disassembly video

  Started by neverendingstudent on 15 Aug, 2026 00:11
  Last post by branadic on 17 Aug, 2026 20:58

  Views: 1809, Replies: 5

• Tektronix 155-0078 ... and a loose transformer

  Started by S57UUU on 15 Aug, 2026 10:05
  Last post by Hydron on 15 Aug, 2026 12:19

  Views: 968, Replies: 1

• rohde schwartz RTE1024 with RT-ZVC02 power probe for current measurement

  Started by poinciana on 14 Aug, 2026 00:10

  Views: 1004, Replies: 0

• Agilent 34970A (34401A) linearity adjustment

  Started by TizianoHV on 06 Oct, 2023 17:16
  Last post by Kleinstein on 13 Aug, 2026 11:39

  Views: 3956, Replies: 5

• ESI Resistance Standard SR1010 and Standard Resistor SR104

  Started by quarks on 13 Dec, 2012 20:18
  Last post by trobbins on 12 Aug, 2026 04:40

  Views: 60239, Replies: 75

• Datron 4920, what a beauty

  Started by NiaDebesis on 26 Jul, 2026 19:26
  Last post by NiaDebesis on 12 Aug, 2026 00:38

  Views: 6243, Replies: 52

• Solartron 7066 EPROM firmware wanted

  Started by Ludwik on 14 Mar, 2022 18:12
  Last post by DVM-James on 11 Aug, 2026 16:24

  Views: 21447, Replies: 44

• Fluke 5520A - Err 104

  Started by Analogdevice on 14 Oct, 2021 17:44
  Last post by UDENIRJESUS on 11 Aug, 2026 14:31

  Views: 23410, Replies: 44

• Z3805A, lady Heather...

  Started by S57UUU on 08 Aug, 2026 16:43
  Last post by S57UUU on 09 Aug, 2026 08:52

  Views: 1296, Replies: 3

• Repurposed 1970's Fluke 4216A Programmable Voltage Source

  Started by trobbins on 09 Aug, 2026 04:55

  Views: 1037, Replies: 0

• Datron 1281 Repair/Maintenance

  Started by leighcorrigall on 28 Nov, 2021 15:58
  Last post by IanJ on 07 Aug, 2026 03:47

  Views: 72153, Replies: 170

• Vref driver circuit

  Started by miro123 on 05 Aug, 2026 13:55
  Last post by miro123 on 05 Aug, 2026 18:52

  Views: 1467, Replies: 5