Data record `instr.loop-impedance-tester.line-and-loop`

Verified 2026-10-27 Confidence: High

Instruments of this class measure both line impedance (line to neutral or line to line) and loop impedance (line to protective conductor) together with the supply voltage and frequency, and some evaluate the result against built-in protective-device tables to show a pass or fail.

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	Metrel product page	Manufacturer page
Data record	instr.loop-impedance-tester.line-and-loop	Verified 2026-10-27
Entry	Loop impedance tester	No revisions

Subject: Loop impedance tester (Instrument classes)
Kind: Instrument fact
Source: Metrel product page, web page edition, MI 3122 SMARTEC Line and Loop Impedance RCD Tester, Metrel. 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.loop-impedance-tester.line-and-loop." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/data/instr.loop-impedance-tester.line-and-loop/.

Test Instrument Reference, Data record instr.loop-impedance-tester.line-and-loop (Oct. 27, 2026), https://www.testinstrumentreference.com/data/instr.loop-impedance-tester.line-and-loop/.

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

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