FPI I2450M Manual page 209

Run 1
PR - Proportional Rate Variation
ASTM E2515 equation (16)
Where:
θ = Total sampling time, min
θ
= Length of recording interval, min
i
V = Volume of gas sample measured by the dry gas meter during the "ith"
mi
time interval, dcf
V
= Volume of gas sample as measured by dry gas meter, dcf
m
V
= Average gas velocity in the dilution tunnel during the "ith" time interval, ft/sec
si
V
= Average gas velocity in the dilution tunnel, ft/sec
s
= Absolute average dry gas meter temperature during the "ith" time interval,
T
mi
= Absolute average dry gas meter temperature,
T
m
= Absolute average gas temperature in the dilution tunnel during the "ith" time interval,
T
si
= Absolute average gas temperature in the dilution tunnel,
T
s
Sample calculation (for the first 1 minute interval of Train 1):
190
(
PR =
1
68
PR =
PFS-TECO
x 0.106 x 17.66
x 28.746 x 16.87
%
Page 15 of 17
o
R
o
R
x ( 90.0 + 460 ) x ( 89.3 + 460
x ( 135.6 + 460 ) x ( 83.0 + 460
o
R
o
R
)
)
x 100
)