MAGEE Scientific AE33 - Unacceptable Quality Control Test Results; Other Problems

Aethalometer
Model AE33
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User's manual – Ver. 1.53 July 2015 74/75
device
status
external device not
working
Check if correct COM port is used
7.3 Unacceptable quality control test results
Test
Criteria
Solution
Flow
verification
Measured flows differ
for more than 10 %
Calibrate flow
Use good flow calibrator
Be sure which flow reporting standard is used
Leakage test
ζ > 10 %
Lubricate optical chamber sliders
stability test
PPBC61 > 450 ng/m
Dirty optical chamber
Faulty electronics
Clean air test
PPBC61 > 550 ng/m
Dirty optical chamber
Check for air-conditioning effects
7.4 Other problems
Problem description
Possible cause
Solution
Reported flow <> set
flow
flow not calibrated
calibrate flow
Overlapping spots on
filter
tape sensors need
adjustment or calibration
increase value of parameter »TA
adjust«
perform tape sensor calibration
Oscillations in BC data
Dirty optical chamber
Clean optical chamber
Air conditioning effects
Install aerosol drier
Parameter k hit limit
values
Air conditioning effects
Install aerosol drier
Temperature change effects
install instrument indoor
Software does not
load – black screen
Problem with CF card
Get a replacement CF card