History of changes to: Primary AC Voltage Standard Calibration of Audio Source
Date Action Change(s) User
Nov. 27, 2023, 2:12 p.m. Added 35 {"external_links": []}
Nov. 20, 2023, 2:03 p.m. Added 35 {"external_links": []}
Nov. 13, 2023, 1:33 p.m. Added 35 {"external_links": []}
Nov. 6, 2023, 1:31 p.m. Added 35 {"external_links": []}
Aug. 14, 2023, 1:30 p.m. Added 35 {"external_links": []}
Aug. 7, 2023, 1:31 p.m. Added 35 {"external_links": []}
July 31, 2023, 1:34 p.m. Added 35 {"external_links": []}
July 24, 2023, 1:35 p.m. Added 35 {"external_links": []}
July 17, 2023, 1:34 p.m. Added 35 {"external_links": []}
July 10, 2023, 1:26 p.m. Added 35 {"external_links": []}
July 3, 2023, 1:26 p.m. Added 35 {"external_links": []}
June 26, 2023, 1:25 p.m. Added 35 {"external_links": []}
June 19, 2023, 1:27 p.m. Added 35 {"external_links": []}
June 12, 2023, 1:29 p.m. Added 35 {"external_links": []}
June 5, 2023, 1:33 p.m. Added 35 {"external_links": []}
May 29, 2023, 1:27 p.m. Added 35 {"external_links": []}
May 22, 2023, 1:29 p.m. Added 35 {"external_links": []}
May 15, 2023, 1:31 p.m. Added 35 {"external_links": []}
May 8, 2023, 1:37 p.m. Added 35 {"external_links": []}
May 1, 2023, 1:27 p.m. Added 35 {"external_links": []}
April 24, 2023, 1:34 p.m. Added 35 {"external_links": []}
April 17, 2023, 1:28 p.m. Added 35 {"external_links": []}
April 10, 2023, 1:25 p.m. Added 35 {"external_links": []}
April 3, 2023, 1:26 p.m. Added 35 {"external_links": []}
Jan. 28, 2023, 11:08 a.m. Created 43 [{"model": "core.projectfund", "pk": 27222, "fields": {"project": 4416, "organisation": 4, "amount": 12337, "start_date": "2019-02-01", "end_date": "2019-04-29", "raw_data": 43172}}]
Jan. 28, 2023, 10:52 a.m. Added 35 {"external_links": []}
April 11, 2022, 3:47 a.m. Created 43 [{"model": "core.projectfund", "pk": 19331, "fields": {"project": 4416, "organisation": 4, "amount": 12337, "start_date": "2019-02-01", "end_date": "2019-04-29", "raw_data": 20509}}]
April 11, 2022, 3:47 a.m. Created 41 [{"model": "core.projectorganisation", "pk": 73602, "fields": {"project": 4416, "organisation": 571, "role": "PARTICIPANT_ORG"}}]
April 11, 2022, 3:47 a.m. Created 41 [{"model": "core.projectorganisation", "pk": 73601, "fields": {"project": 4416, "organisation": 5821, "role": "PARTICIPANT_ORG"}}]
April 11, 2022, 3:47 a.m. Created 41 [{"model": "core.projectorganisation", "pk": 73600, "fields": {"project": 4416, "organisation": 5821, "role": "LEAD_ORG"}}]
April 11, 2022, 3:47 a.m. Created 40 [{"model": "core.projectperson", "pk": 45226, "fields": {"project": 4416, "person": 6340, "role": "PM_PER"}}]
April 11, 2022, 1:47 a.m. Updated 35 {"title": ["", "Primary AC Voltage Standard Calibration of Audio Source"], "description": ["", "\n"The motivation for this project is to establish traceability to national standards for the key performance parameters for the Keysight audio source and analyser.\n\nThe challenge is to provide traceability for the three relevant parameters: absolute amplitude accuracy; amplitude flatness over the audio frequency range; and the fidelity of the measurement requirements, reflected in the dynamic range and accuracy. The accuracy needed to differentiate between products in this market is generally less than 1%. Due to the very low levels of distortion present in an audio source it is inherently difficult to establish a fully traceable measure of the total harmonic distortion.\n\nThis project focuses on a providing a traceable series of assessments that would increase confidence of new customers in the absolute performance of these instruments, when calibrated against the UK's primary standards. This would represent a step change in the way in which these products can be tested as well as establishing a step change in the level of accuracy. This coupled with the independently verifiable, and traceable, levels of THD would enable increased confidence in this product range and would therefore lead to more sales.\n\n"], "extra_text": ["", "\n\n\n\n"], "status": ["", "Closed"]}
April 11, 2022, 1:47 a.m. Added 35 {"external_links": [16569]}
April 11, 2022, 1:47 a.m. Created 35 [{"model": "core.project", "pk": 4416, "fields": {"owner": null, "is_locked": false, "coped_id": "b7f2edb0-abe9-46c3-ae24-f61319c25b52", "title": "", "description": "", "extra_text": "", "status": "", "start": null, "end": null, "raw_data": 20494, "created": "2022-04-11T01:38:33.011Z", "modified": "2022-04-11T01:38:33.011Z", "external_links": []}}]