Inlet Leakage Test - MAGEE Scientific Aethalometer AE33 User Manual

Aethalometer
Model AE33

9.11 Inlet Leakage test

The Inlet Leakage test is used to test the integrity of the inlet system, from the point of sample
entry to the instrument's analytical area. In many cases, the sample entry point is outdoors,
while the instrument is indoors. This test will detect any leakage throughout the entire
system.
The test routine compares two measurement values from an external flowmeter: one taken at
rear port of the instrument, and the other at the sample point of entry (which may be
outdoors). The routine requires the use of the black rubber Flow Calibration Pad.
The Inlet Leakage test is accessed from the 'Operation/General' screen, press the box Inlet
Leakage Test. During this test, data will be flagged by status code 6144. Follow the
instructions on the screen to insert the Flow Calibration Pad, and measure the flows using an
external flow meter at the two points. When the test is finished, a report is generated which is
also saved internally for future download:
Inlet leakage test report
Serial number: AE33-S00-00027
Date and time: 30 Jun 2015 14:10:00
Selected flow: 5000 mlpm
Instrument inlet flow: 4700
Outdoor inlet flow: 4500
Instrument leakage is: 4.3 %
The leakage should be less than 10%. If the reported leakage is larger than 10%, contact
Magee Scientific, Aerosol or your authorized distributor.
____________________________________________________________________________________________________________
User's manual – Ver. 1.55 July 2017 85/146