Classifier Calibration D–9
5. Make sure that Exhaust Flow and Excess Flow port fittings
are connected by a tube on the outside of the Classifier. Put a
3
⁄8 to ¼ inch adapter on the Bypass Flow port fitting. Connect
the
Bypass Flow port fitting to the Polydisperse Flow port
fitting with a tube.
6. Install the 0.0457 impactor nozzle.
7. Connect the Flowmeter Standard to the Impactor Inlet fitting.
8. Set Pressure Drop to 5 cmH
2
0 and wait for the flow to
stabilize. Take 5 samples and average them. Record the
Pressure Drop (dP) and flowmeter (Qcal) readings.
9. Repeat step 8 for 10, 20, 30, 40, 50, and 60 cmH
2
0.
10. In the Electrostatic Classifier software, select the Calibration
tab and then select
Impactor Flow tab.
11. Select the size of the impactor nozzle (.0457/.0508/.0710 cm)
using the
Impactor Type drop-down box. Enter the serial
number of the corresponding impactor.
12. Enter the measured flows from steps 8 and 9 into the
Measured Flow column and click on the
Set Calibration
button.
Figure D-8
Impactor Calibration Tab
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