Calibration Data Measurements
Parameter | Symbol | Units | Tolerances |
Barometric pressure corrected | PB | kPa (in. Hg) | ±0.03 kPa (±0.01 in. Hg) |
Ambient temperature | TA | °C (°F) | ±0.3 °C (±0.54 °F) |
Air Temperature into LFE | ETI | °C (°F) | ±0.15 °C (±0.27 °F) |
Pressure depression upstream of LFE | EPI | kPa (in. H2O) | ±0.01 kPa (±0.05 in. H2O) |
Pressure drop across the LFE matrix | EDP | kPa (in. H2O) | ±0.001 kPa (±0.005 in. H2O) |
Air temperature at CVS pump inlet | PTI | °C (°F) | ±0.25 °C (±0.45 °F) |
Pressure depression at CVS pump inlet | PPI | kPa (in. Fluid) | ±0.021 kPa (±0.046 in. Fluid) |
Specific gravity of manometer fluid (1.75 oil). | Sp Gr | ||
Pressure head at CVS pump outlet | PPO | kPa (in. Fluid) | ±0.21 kPa (±0.046 in. Fluid) |
Air temperature at CVS pump outlet (optional) | PTO | °C (°F) | ±0.25 °C (±0.45 °F) |
Pump revolutions during test period | N | Revs | ±l Rev. |
Elapsed time for test period | t | sec. | ±0.05 sec. |
Vo = (Qs/n) * (Tp/293) * (101.3/Pp)
Where:
Where:
Where:
Where:
Vo = Do - M(Xo)
n = A - B([DELTA] Pp)
D0' M, A, and B are the slope-intercept constants, describing the lines.
Where:
The calibration procedure described below establishes the value of the calibration coefficient at the measured values of pressure, temperature and air flow.
Calibration Data Measurements
Parameter | Symbol | Units | Tolerances |
Barometric pressure (corrected) | PB | kPa (in. Hg) | ±0.03 kPa (±0.01 in. Hg) |
Air temperature, flowmeter | ETI | °C (°F) | ±0.15 °C (±0.27 °F) |
Pressure depression upstream of LFE | EPI | kPa (in. H2O) | ±0.01kPa (±0.05 in. H2O) |
Pressure drop across LFE matrix | EDP | kPa (in. H2O) | ±0.001 kPa (±0.005 in. H2O) |
Air flow | Qs | m3/min (ft3/min) | ±0.5% |
CFV inlet depression | PPI | kPa (in. fluid) | ±0.02 kPa (±0.05 in. fluid) |
Temperature at venturi inlet | Tv | °C (°F) | ±0.25 °C (±0.45 °F) |
Specific gravity of manometer fluid (1.75 oil) | Sp Gr | . . . | . . . |
Where:
Where:
40 C.F.R. §86.519-90