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User's manual – Ver. 1.53 July 2015 70/75
6.7 Flow verification
Flow verification routine is used to check if internal flow-meters need calibration. No
instrument settings are changed during the flow verification routine.
For flow verification you need a flow calibration pad and an external flow-meter, which you
connect to the Aethalometer inlet.
To start flow verification select “Flow verification” button on Operation/General screen. When
the procedure is finished you will get the table with measured flows, reported at the flow
reporting standard selected for the instrument. Flow verification report:
Manual flow verification report:
02 Oct 2014 14:41:54
External flowmeter measurement:
P T Fin
101325 25 886
101325 25 3000
101325 25 5000
Flow verification results:
Flow reporting standard: AMCA 101325 Pa 21.11 °C
Fin F1 (%) Fc (%)
874 851 (97) 865 (99)
2961 2921 (99) 2933 (99)
4935 4880 (99) 4880 (99)
If measured flows differ for more than 10 % you need to recalibrate the flow.
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