# 255.809 Leaks: instrument sensitivity verification.

- **operation:** document
- **citation:** 16 NYCRR 255.809
- **title:** 255.809 Leaks: instrument sensitivity verification.
- **source type:** regulation
- **agency:** New York State Public Service Commission
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** Not available
- **summary:** Transmission and Distribution of Gas. Each instrument utilized for leakage surveys and investigations must be tested against a known sample or in accordance with the manufacturer's recommended instructions as follows:

(a) after any repair or replacement of parts other than normal maintenance;

(b) once every three months for CGI's and solid-state leak detection instruments and yearly for hydrog
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- **source url:** https://govt.westlaw.com/nycrr/Document/I505da84bcd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)
**body:**

Each instrument utilized for leakage surveys and investigations must be tested against a known sample or in accordance with the manufacturer's recommended instructions as follows:

(a) after any repair or replacement of parts other than normal maintenance;

(b) once every three months for CGI's and solid-state leak detection instruments and yearly for hydrogen flame ionization (HFI) instruments; and

(c) any time it is suspected that the calibration has changed.
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- **body characters:** 466