Palas Fidas 200 E, Operating Manual, Page: 74 / 106

6 Verifying and calibrating measuring system
74 5200-en_V2.0_06/20
Overview of test points
Work through the following points, one after the other:
Item Parameter Detailed description
Check that aerosol tube and sensor unit
are unobstructed -
Checking that aerosol
sensor is unobstructed
[
}
75]
Check that controller shows no leakage Net leakage of controller
Maximum leakage permitted: 0.07 l/min
Checking that controller
shows no leakage
[
}
76]
Check device for leakage Net leakage of total system
Maximum leakage permitted: 0.49 l/min
Checking device for
leakage [
}
78]
Check aerosol sensor zero point
Cn
Correct value: 0.0
Checking aerosol sensor
zero point [ } 80]
Set aerosol sensor offset
Offset
Permitted range of compensating volt-
age 2.0 - 3.0 V
Setting aerosol sensor
offset [ } 81]
Calibrate flow rate
Sensor flow rate
Maximum deviation permitted from ref-
erence measuring device value: 0.15 l/
min
Calibrating flow rate
[ } 81]
Required only for initial commissioning
at a new location: Set average particle
velocity
Velocity calibrated Setting average particle
velocity [
}
83]
Calibrate particle size
Measured peak at
Maximum deviation permitted from set-
point raw channel: 0.5 channels
Calibrating particle size
and particle velocity
[
}
84]
Calibrate particle velocity
Velocity at cursor
Maximum deviation permitted from
value indicated on Fidas calibration cer-
tificate: 0.5 m/s