Page 6 - CSA INDEX - Autumn 2019
P. 6

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.
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