Pelpro PP130-B Owner's Manual page 68

OMNI-Test Laboratories, Inc.
PR - Proportional Rate Variation
ASTM E2515 equation (16)

   
V V T

mi s m
PR

   
V V T

i m si mi
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
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):
(
PR =
PR =
Control No. P-SFDK-0002, Effective date: 5/06/2016


T
 
si
100

T

s
time interval, dcf
360 x 1.615 x 14.73
10 x 59.06 x 14.48
104 %
o
R
x ( 93.0 + 460 ) x ( 82.2 + 460 )
x ( 81.7 + 460 ) x ( 75.0 + 460 )
68 of 112
File - 135PS040E PP70 Run 1, Tab - Example Calculations
o
R
o
R
)
x 100
o
R