Sintrol S304 - Calibrating to mg;m³; Calibration to mg;m³ Procedure

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6.9 Calibrating to mg/m
3
Dust Monitor S305 can be calibrated to show concentration in mg/m
3
.
Calibration is based on manual gravimetric method (standard EN13284-Part1-
April 2002).
The European Standard, EN13284-1, describes a reference method for the
measurement of low dust content, concentrations below 50 mg/m3 in standard
conditions, in gases.
When process conditions (gas velocity, particle type, characteristics and size
distribution) remain relatively constant, the unit’s output signal is directly
proportional to dust concentration. If the conditions changes more than ± 20 %
the compensation of changes is recommended to maintain accuracy.
After gravimetric sampling, the instrument reading can be directly related to
dust concentration expressed in mg/m
3
. The minimum time for the gravimetric
dust sampling is one hour.
A longer period will increase the accuracy of collected data. There is no
maximum time limit for collecting data.
6.9.1 Calibration to mg/m
3
procedure:
1. Ensure that the Automatic setup procedure is carried out in normal
process conditions in the duct/stack.
2. Start the gravimetric sampling (iso-kinetic sampling)
3. Go to service mode if model S305, not needed when S304
4. Press and hold down button C, and then press AUTOMATIC SETUP
BUTTON (the white button on the lower printed circuit board)
5. Make sure that the green LED indicator turns red
6. Replace the cover. The monitor is now collecting measurements to be
used later for setting the relation to the gravimetric samples.
7. When the gravimetric sampling is done, press button A (left button) to
stop data sampling.
8. The LED indicator will turn green.
9. NOTE! Do NOT change monitor parameters before you get the result
from the gravimetric sampling [mg/m
3
].
10. When a gravimetric comparison measurement result is determined you
can change unit’s output accordingly.