CEL-712 Microdust Pro Real-time Dust Monitor
23 Casella Measurement
measurements resolve to four significant figures with appropriate decimal point
position. Select the measurement range which displays the particulate
concentration you expect to measure with the greatest accuracy. If you are not
sure what the particulate concentration might be, select the Auto range so the
instrument can select the most effective range for the measurements it makes.
The standard measurement ranges are 2.5 mg/m³, 25 mg/m³, 250 mg/m³,
2,500 mg/m³, 25 g/m³ and 250 g/m³
Note that operation at high dust concentrations might lead to
contamination of probe optics and a failure to operate on the lowest
measurement ranges.
Contaminated ranges will become locked out, however normal operation may
be available on other ranges.
Display averaging period
The displayed particulate concentration is a rolling average of measurements
taken over the averaging time that you set. In some applications, where aerosol
concentrations change rapidly, you can improve measurement stability by
setting a longer averaging time. Averaging periods from 1 to 60 seconds can be
selected.
Logging interval
The logging interval is the time between each recorded data point. Dust values
saved at each logging point represent the average dust concentration which has
occurred during the logging interval.
Note that data logging stops automatically when the internal memory is full.
This means that, for long measurement Runs you should use a long logging
interval. Logging intervals from 1 second to 60 minutes can be selected.
See section 8.3 for examples of storage capacity at different logging intervals.
3.9 Set the display backlight
The Microdust Pro instrument has a display backlight. The backlight allows you
to use the instrument in poor ambient lighting conditions, or in darkness.
The Backlight screen allows you to set the following backlight options:
Set whether the backlight operates automatically, or only after you press
a key. You can also set the backlight to remain on permanently.
Set how long the backlight remains on after the last keypress.
Set the brightness level of the backlight.
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