Page 6 - CSA INDEX - Autumn 2019
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NEW CSA TECHNICAL
MEMORANDA & GUIDANCE NOTE
TM1 – STANDARD COMMISSIONING PROCEDURES AND
GN 13 – VOLUME FLOW RATE MEASUREMENT BY
NON-INVASIVE FLOW METERS
TM1
This Technical Memorandum is one of a series of
publications prepared by the Commissioning
Specialists Association for use by Commissioning
Engineers at all levels of training, skill or competence
to give an overview into the generally accepted
procedures and codes for the commissioning of
mechanical and for buildings.
GN13
In some instances, especially on existing systems in
older properties, there may not be the provision to
enable the conventional method of volume flow rate
measurement using a manometer; either because
flow measuring devices (FMDs) have not been
installed or the test points on the FMDs are broken
or blocked. In these cases, non-invasive flow
measurement devices such as Ultra-Sonic Flow
Meters (USFM) can be used as an alternative method
of measuring volume flow rates.