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62
Po/Pa 22 24 26 28 30
0.944 1.176 1.179 1.183 1.186 1.190
0.945 1.177 1.181 1.184 1.188 1.191
0.946 1.178 1.182 1.186 1.189 1.193
0.947 1.180 1.183 1.187 1.190 1.194
0.948 1.181 1.185 1.188 1.192 1.195
0.949 1.182 1.186 1.190 1.193 1.197
b) The reading of flow rate is:
Qa = 1.182 m3/min (actual)
If your Po/Pa number is not in look up table ie; >.979 then interpolate.
7. Determine flow rate in terms of standard air.
Qstd = 1.189 std m3/min
Total Volume
Assume our sampler ran 23.8 hours (end ETI reading - start ETI reading)
** Make sure ETI is in hours otherwise convert to hours **
actual Total m3 = 1.182 x 60 x 23.8 = 1687.9 m3
standard Total m3 = 1.189 x 60 x 23.8 = 1697.9 m3
To convert to cubic feet multiply m3 by 35.31
“Note” Reference page 66 see Appendix J for Filter Handling, Conditioning,
Weighing, and Calculation of PM10 Concentration Measurements.
Qstd =
)
K )2+(273
298K
( )
Hg mm 760
Hg mm 7
( /
m
1. 3
4
62
min182
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