TE-5170DV TSP VFC 20 Operations Manual
The pressure measured at the orifice port using a manometer. The first point should be
performed with the orifice knob turned counter-clockwise or wide open, then four
consecutive points turning the orifice knob clockwise (not closed)
Good idea to take a few extra points here.
The pressure measured at the sampler side port using a manometer (clear tubing that is
connect to bulk head fitting that is connected to side of filter holder)
The calibrator flow is calculated (Qa) using the formula:
The calculated flow in m3/min will be calculated using the g-factor formula, this flow will correspond to the flow
found in the lookup table supplied with the VFC.
The percent difference will be calculated using the formula:
As per stated in the method IO-2.1, % Difference calculations should be less than +-4%
3. To calculate the total air volume during the sample enter the following
Calculate Total Air Volume Using G-Factor
Enter the average temperature of the sample throughout the sample period in Deg F.
The temperature will then be calculated in Deg K
Enter the average barometric pressure of the sample throughout the sample period in
Inches of Hg. The barometric pressure in mmHg will then be calculated
Clea Filter H20
Enter the clean filter pressure in inches of water prior to sampling
Dirt Filter H20
Enter the dirty filter pressure in inches of water after sampling. The average sample
pressure will then be calculated in mmHg
Enter the total runtime in hours (xx.xx) of the sample
Using the g-factor formula, Po/Pa will be calculated and an average flow rate of the sample will be calculated in
m3/min. Using this information the total sample volume will be calculated.