BS 3156 : 1996 Analysis of fuel gases Part 11. Methods for non-manufactured gases Section 11.5 Performance evaluation for on-line analytical systems
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This International Standard specifies a method of detemining whether an analytical system for natural gas is satisfactory, on the assumptions that
a) the analytical requirement has been clearly and unamiguously defined, for the range and uncertainty of component concentration measurements, and the uncertainty of properties which may be calculated from these measurements:
b) the analytical and calibration procedures have been full described:
c)the method is intended to be applied to gases having compositions which vary over ranges normally found in transmission and distribution networks.