Data record `instr.proving-unit.power-and-low-battery`

Verified 2026-10-27 Confidence: Medium

Proving units are powered by alkaline batteries or an external low-voltage supply, and a low-battery indicator warns when the output may fall below nominal, so that a good tester is not failed because of a weak source.

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.power-and-low-battery	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 PD440 440V AC Proving Unit, Martindale Electric. Publisher page

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-27	created
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.power-and-low-battery." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/data/instr.proving-unit.power-and-low-battery/.

Test Instrument Reference, Data record instr.proving-unit.power-and-low-battery (Oct. 27, 2026), https://www.testinstrumentreference.com/data/instr.proving-unit.power-and-low-battery/.

@misc{etr-data-instr-proving-unit-power-and-low-battery,
  title = {Data record instr.proving-unit.power-and-low-battery},
  howpublished = {\url{https://www.testinstrumentreference.com/data/instr.proving-unit.power-and-low-battery/}},
  organization = {Test Instrument Reference},
  publisher = {Test Instrument Reference},
  year = {2026},
  note = {last substantive change 2026-10-27}
}

{{cite web |title=Data record instr.proving-unit.power-and-low-battery |website=Test Instrument Reference |publisher=Test Instrument Reference |url=https://www.testinstrumentreference.com/data/instr.proving-unit.power-and-low-battery/ |date=2026-10-27 |access-date=}}