Emerson Rosemount OPM3000, Инструкция по эксплуатации

Страница: 50 / 52

Instruction Manual Rev B
49
a vertical bend 1/2 the distance up the vertical axis from the bottom of the
duct for downward flow (figure 1–5).
(iii) Alternative Locations and Light Beam Paths.
You may select locations and light beam paths, other than those
cited above, if you demonstrate, to the satisfaction of the Administrator or delegated agent, that the average opacity measured
at the alternative location or path is equivalent to the opacity as measured at a location meeting the criteria of sections 8.1(2)(i)
and 8.1(2)(ii). The opacity at the alternative location is considered equivalent if (1) the average opacity value measured at the
alternative location is within ±10 percent of the average opacity value measured at the location meeting the installation criteria,
and (2) the difference between any two average opacity values is less than 2 percent opacity (absolute). You use the following
procedure to conduct this demonstration: simultaneously measure the opacities at the two locations or paths for a minimum
period of time (e.g
., 180-minutes) covering the range of normal operating conditions and compare the results. The opacities of
the two locations or paths may be measured at different times, but must represent the same process operating conditions. You
may use alternative procedures for determining acceptable locations if those procedures are approved by the Administrator.