Sherwood Meridian Series Manual page 66

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
= Volume of gas sample measured by the dry gas meter during the "ith"
V
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 =
66 of 194
Control No. P-SFDK-0002, Effective date: 5/06/2016


T
 
si
100


T
s
time interval, dcf
361 x 0.154 x 12.83
1 x 59.52 x 13.07
96 %
o
R
x ( 114.0 + 460 ) x ( 81.9 + 460 )
x ( 93.6 + 460 ) x ( 75.0 + 460 )
66 of 194
File - Run 1, Tab - Example Calculations
o
R
o
R
)
x 100
o
R