Data record `instr.proving-unit.known-source-at-the-point-of-work`

Verified 2026-10-27 Confidence: Medium

A proving unit gives the worker a known source to test against wherever the work is, so that proving the tester does not depend on finding and touching a live part of the installation.

Provenance. Where this record comes from and where it is used: the cited source, the record itself and the entry that cites it.

Provenance: the chain from source to entry.
Step	Item	Detail
Source	Martindale product page	Manufacturer page
Data record	instr.proving-unit.known-source-at-the-point-of-work	Verified 2026-10-27
Entry	Proving unit	No revisions

Subject: Proving unit (Instrument classes)
Kind: Instrument fact
Source: Martindale product page, web page edition, Martindale VT28PD Voltage Indicator and Proving Unit Kit, Martindale Electric. Publisher page

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-27	created
2026-10-27	revised
2026-10-27	review_status unreviewed -> software_reviewed

Cite this page

Cite the governing standard for the fact itself; cite this page as the finding aid.

"Data record instr.proving-unit.known-source-at-the-point-of-work." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/data/instr.proving-unit.known-source-at-the-point-of-work/.

Test Instrument Reference, Data record instr.proving-unit.known-source-at-the-point-of-work (Oct. 27, 2026), https://www.testinstrumentreference.com/data/instr.proving-unit.known-source-at-the-point-of-work/.

@misc{etr-data-instr-proving-unit-known-source-at-the-point-of-work,
  title = {Data record instr.proving-unit.known-source-at-the-point-of-work},
  howpublished = {\url{https://www.testinstrumentreference.com/data/instr.proving-unit.known-source-at-the-point-of-work/}},
  organization = {Test Instrument Reference},
  publisher = {Test Instrument Reference},
  year = {2026},
  note = {last substantive change 2026-10-27}
}

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