The full-life efficiency will be determined after adding a quantity of dust at the rate of 1 g/m3 (grams per cubic meter) until the test filter reaches a predetermined pressure restriction. Enter the air flow rate, dust feed rate, and termination pressure into the control computer dialog box. Set the control computer to record all necessary data parameters for the duration of the test.
Reinstall the absolute filter, test filter and appropriate fixture onto the test stand. At the Lab computer interface, lock in the scale reading by checking the appropriate dialog box. Switch on the blower and verify that it reaches the required test air flow rate and allow the system to stabilize. Turn on the dust feeder using the dialog box control button and record the initial restriction (delta-p).
Monitor the system parameters until the termination point has been reached. The control computer will automatically shut down the blower and dust feeder at the termination point. Record screen data on the appropriate data sheet and file it in the test folder.
Remove the test filter, fixtures and the absolute filter from the test stand. Photograph the test article and fixtures, and note any anomalies in the comments section of the datasheet. Place the absolute filter in the ventilated oven and periodically check for the weight to stabilize. Record the final absolute filter weight on the data sheet.
Weigh the test filter and fixture. Record the weight(s) on the appropriate data sheet and archive the test filter.
Appendix A: Equations and Formulas