6
Verifying and calibrating measuring system
5200-en_V2.0_06/20
87
Calibrating particle size
Use the reference value
setpoint raw channel
, which can be found on
the label of the calibration dust container and on the certificate for the cali-
bration dust.
Calibration is successful when the
measured peak at
is identical to the
value of the raw data channel, found on the label of the calibration dust con-
tainer.
Maximum deviation permitted:
0.50
channels.
The conversion factor can be changed if deviation from the reference value
is less than
1.50
channels.
If deviation is greater, the aerosol sensor glasses are probably polluted. If
this is the case, clean the glasses before proceeding.
Apply the following procedure to change a conversion factor “amplification.”
This means that even a slight change in the factor (after the decimal point)
significantly impacts the result of measurement. For this reason, change only
the
last two decimal places
of the factor.
The following procedure has to be repeated at least once to check if the
changes have led to the desired result. The procedure may need to be re-
peated several times.
Proceed as follows:
1.
Write down the value of the parameter
measured peak at
.
2.
Touch
calibrate PM amplification
.
ð
A keypad opens.
3.
If the measured value is lower than the reference value, increase the
value.
If the measured value is higher than the reference value, decrease the
value.
If the values are the same, calibration of the particle size is completed.
