United States Stove Company 7700, Руководство пользователя

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Client: QC inc. Date: March 6, 2011
Project No. Page 12 of 13
VI.A.(3). GAS ANALYZERS
The continuous analyzers are zeroed and spanned before each test with
appropriate gases. A mid-scale multi-component calibration gas is then
analyzed (values are recorded). At the conclusion of a test, the instruments
are checked again with zero, span and calibration gases (values are recorded
only). The drift in each meter is then calculated and must not exceed 5% of
the scale used for the test.
At the conclusion of each unit test program, a five-point calibration check is
made. This calibration check must meet accuracy requirements of the applic-
able standards. Consistent deviations between analyzer readings and
calibration gas concentrations are used to correct data before computer
processing. Data is also corrected for interferences as prescribed by the
instrument manufacturer’s instruc
tions.
VI.B. TEST METHOD PROCEDURES
VI.B.(1). LEAK CHECK PROCEDURES
Before and after each test, each sample train is tested for leaks. Leakage
rates are measured and must not exceed 0.02 CFM or 4% of the sampling
rate. Leak checks are performed checking the entire sampling train, not just
the dry gas meters. Pre-test and post-test leak checks are conducted with a
vacuum of 5 inches of mercury. Vacuum is monitored during each test and
the highest vacuum reached is then used for the post test vacuum value. If
leakage limits are not met, the test run is rejected. During, these tests the
vacuum was typically less than 2 inches of mercury. Thus, leakage rates
reported are expected to be much higher than actual leakage during the tests.
VI.B.(2). TUNNEL VELOCITY/FLOW MEASUREMENT
The tunnel velocity is calculated from a center point Pitot tube signal multiplied
by an adjustment factor. This factor is determined by a traverse of the tunnel
as prescribed in EPA Method 1. Final tunnel velocities and flow rates are
calculated from EPA Method 2, Equation 6.9 and 6.10. (Tunnel cross
sectional area is the average from both lines of traverse.)
Pitot tubes are cleaned before each test and leak checks are conducted after
each test.
VI.B.(3). PM SAMPLING PROPORTIONALITY (5G-3)
Proportionality was calculated in accordance with EPA Method 5G-3. The
data and results are included in Appendix F.