scope:

NVN-CLC/TS 50612 provides guidance on the selection, use and maintenance of portable electrical apparatus conforming to EN 50379-1 [4] and EN 50379-2 [5] or EN 50379-3 [6] to: a) measure combustion flue gas parameters of appliances in domestic premises burning 1st, 2nd or 3rd family gases of the following description: 1) Type A, Type B and Type C gas-fired appliances, except those appliances where the appliance instructions (or design, see 7.3.2.1), prohibit combustion sampling, and, 2) all gas-fired appliances for which the appliance manufacturer has provided a purpose-designed combustion sampling point or specific sampling instructions, b) use as a diagnostic instrument to assist an operative: 1) in confirming satisfactory combustion at the time of commissioning, in accordance with appliance instructions or national or local regulations or standards; 2) in confirming satisfactory combustion at the time of servicing in accordance with national or local regulations or standards or following servicing in accordance with appliance instructions; 3) in confirming satisfactory combustion following maintenance, in accordance with appliance instructions or national or local regulations or standards.