SKC 225-380 Parallel Particle Impactor - Manual (Page 4)

4
Calibration and Sampling
As the particle load on the fi lter increases during sampling, the pressure drop will
also increase. Therefore, use a compensating sample pump such as the AirChek
Series or Leland Legacy depending on fl ow rate requirements.
Calibration
Option 1: Using a Calibration Jar
Calibrate pump fl ow rate with the PPI (support, fi lter, and impaction substrates
loaded) in line. See pump and calibrator operating instructions.
1. Ensure impactor is loaded with a support, collection fi lter, and impaction
substrates and that it is fully assembled (see Inserting a Collection Filter into the
PPI and Inserting Impaction Substrates into the PPI).
2. Use a calibration jar to calibrate pump fl ow rate.
a. Unscrew jar lid and remove.
b. Using supplied adapter, att ach soft tubing end to PPI outlet. Att ach
rigid end of adapter to Luer adapter in center of jar lid.
c. With PPI att ached, place lid on jar and screw
down until tight.
d. Att ach center tubing on outside of jar lid to pump
inlet.
e. Use 1/4-inch tubing to att ach calibrator to barbed elbow fi tt ing on
outside of jar lid.