OMNI-Test Laboratories, Inc.
Thermal Metering System Calibration
Y Factor
Previous Calibration Comparision
Manufacturer:
Apex
Date
6/15/2020
Acceptable
Deviation (5%)
Deviation
Model:
XC-60-EP
y Factor
0.994
0.0497
0.001
Serial Number:
702003
Acceptance
Acceptable
OMNI Tracking No.:
OMNI-00371
Calibrated Orifice:
FALSE
Current Calibration
Acceptable y Deviation
0.020
Average Gas Meter y
Factor
Average
Orifice
Meter
dH@
Maximum y Deviation
0.007
TRUE
0.995
N/A
Acceptable dH@ Deviation
N/A
Calibration Date:
11/25/20
Maximum dH@ Deviation
N/A
N/A
Calibrated by:
Tony Tong
Acceptance
Acceptable
Calibration Frequency:
Six Month
Next Calibration Due:
5/25/2021
Instrument Range:
1.000
cfm
Standard Temp.:
68
oF
Reference Standard *
Standard Press.:
29.92
"Hg
Standard
Model
Standard Test Meter
Barometric Press., Pb:
30.22
"Hg
Calibrator
S/N
OMNI-00001
Signature/Date:
Calib. Date
25-Nov-19
Calib. Value
0.9981
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
2.20
0.92
3.20
Initial Reference Meter
470.757
476.852
484.075
Final Reference Meter
475.9
481.838
489.442
Initial DGM
0
0
0
Final DGM
5.133
5.042
5.326
Temp. Ref. Meter (°F), Tr
64.6
63.3
63.0
Temperature DGM (°F), Td
65.0
65.0
65.0
Time (min)
32.0
50.0
26.5
Net Volume Ref. Meter, Vr
5.143
4.986
5.367
Net Volume DGM, Vd
5.133
5.042
5.326
Gas Meter y Factor =
0.996
0.988
1.002
Gas Meter y Factor Deviation (from avg.)
0.000
0.007
0.007
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
88 of 161
/ 11/25/2020
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