
OMNI-Test Laboratories, Inc.
Thermal Metering System Calibration
Y Factor
Previous Calibration Comparision
Manufacturer:
APEX
Date
7/18/2017
Acceptable
Deviation (5%)
Deviation
Model:
XC-60-EP
y Factor
0.981
0.04905
0.004
Serial Number:
606001
Acceptance
Acceptable
OMNI Tracking No.:
OMNI-00335
Calibrated Orifice:
FALSE
Current Calibration
Acceptable y Deviation
0.020
Average Gas Meter y
Factor
Average
Orifice
Meter
dH@
Maximum y Deviation
0.005
TRUE
0.977
N/A
Acceptable dH@ Deviation
N/A
Calibration Date:
01/17/18
Maximum dH@ Deviation
N/A
N/A
Calibrated by:
B. Davis
Acceptance
Acceptable
Calibration Frequency:
Six months
Next Calibration Due:
7/18/2018
Instrument Range:
1.000
cfm
Standard Temp.:
68
oF
Reference Standard *
Standard Press.:
29.92
"Hg
Standard Model
Standard Test Meter
Barometric Press., Pb:
29.94
"Hg
Calibrator S/N
OMNI-00001
Signature/Date:
1/18/2018
Calib. Date
30-Oct-17
Calib. Value
0.9977
y factor (ref)
Calibration Parameters
Run 1
Run 2
Run 3
Reference Meter Pressure ("H2O), Pr
0.00
0.00
0.00
DGM Pressure ("H2O), Pd
2.30
1.38
1.00
Initial Reference Meter
198.1
203.7
214.2
Final Reference Meter
203.602
208.8
222.5
Initial DGM
0
0
0
Final DGM
5.65
5.298
8.67
Temp. Ref. Meter (°F), Tr
68.1
68.1
68.0
Temperature DGM (°F), Td
77.0
78.0
80.0
Time (min)
26.5
31.8
43.5
Net Volume Ref. Meter, Vr
5.502
5.100
8.300
Net Volume DGM, Vd
5.65
5.298
8.67
Gas Meter y Factor =
0.982
0.975
0.974
Gas Meter y Factor Deviation (from avg.)
0.005
0.002
0.003
Orifice dH@
N/A
N/A
N/A
Orifice dH@ Deviation (from avg.)
N/A
N/A
N/A
where:
1. Deviation = |Average value for all runs - current run value|
** 2. y = [Vr x (y factor (ref)) x (Pb + (Pr/ 13.6)) x (Td + 460) ]/ [Vd x (Pb + (Pd / 13.6)) x (Tr + 460)]
** 3. dH@ = 0.0317 x Pd / (Pb (Td + 460)) x [ (Tr + 460) x time) / Vr ]^2
* Reference calibration is traceable to NIST through NIST Test # 40674, Kimble ASTM E1272, or NIST traceable laboratory
** Equations come from EPA Method 5
The uncertainty of measurement is ±0.14 ft
3
/min. This is based on the reference standard having a TAR (Test Accuracy Ratio) of at least 4:1.
Yes
Control No. C-SSB-0005, Effective Date: 7/7/2011
1/19/2018
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