Overview:
The Microdust pro from Casella is a portable, real time monitor for
assessing the concentration of suspended particulate matter. It is
probably the most versatile instrument available with the ability to
measure from 1ugm-3 to 2500 mgm-3.
It is the only hand-held real-time dust monitor on the market capable
of graphically presenting variations in dust concentration on a real time
scrolling graph – no longer is it necessary to wait to analyze results
on a PC. Features:
| An incredible measurement capability from 1ugm-3 to
2500mgm-3. |
| Comprehensive data-logger providing over 15,700 data points |
| Detachable probe for identification of problem areas |
| Options for TSP, PM10, PM2.5 or ISO Repairable
measurement |
| Instrument software calibration and zero routines |
| 4 user defined calibration routines available for differing dust
types |
| Option of alkaline or rechargeable batteries |
| 32bit WinDust pro PC software |
Applications:
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Occupational
health and safety monitoring Walk through surveys Site boundary
monitoring and environmental measurement Industrial process
monitoring Testing respiratory equipment or air filtration
efficiency Research activities |
Operation:
The Microdust pro measures particulate concentrations using a
near forward angle light scattering technique. Infrared light of 880nm
wavelength is projected through the sensing volume where contact with
particles causes the light to scatter. The amount of scatter is
proportional to the mass concentration and is measured by the photo
detector. By using a narrow angle of scatter (12-20o) the
majority of scattered light is in the diffracted and refracted components,
which minimizes the uncertainty associated with particle color, shape and
refraction index. Concentration
Range:
The Microdust pro has the advantage that there is only one model
which covers the entire measurement range (0-2500mgm-3). It is
possible to "fix" the range of the instrument, or have it as an
"auto-ranging" device. Calibration:
Each Microdust pro is individually factory calibrated, using a
gravimetric technique. This instrument can be returned to its
"factory" calibration setting at any time during its life by the
use of a non-degradable calibration insert. An individual gravimetric
calibration is also possible.
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Specifications:
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Operation |
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Sensing Technique: |
Near forward light scattering – 880nm infrared |
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Ranges: |
All instruments provide 0 to 2500mgm-3 over four ranges as
standard: 0-2.5, 0-25, 0-250, 0-2500mgm-3
Active range may be fixed or auto-ranging |
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Resolution: |
0.001 mgm-3 (1ugm-3) |
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Operating Temp Range: |
0 to 50oC (non condensing) |
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Storage Temp Range: |
-20 oC to +55 oC |
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Zero Stability: |
+/-0.002mgm-3/ oC |
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Span Stability: |
<0.7% FSD / oC |
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Power |
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Battery: |
4 x AA / MN1500 cells – Alkaline or rechargeable NiCd |
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Operating Duration: |
Alkaline (2700mAh) typically >20 hours
NiCd cells (950mAh) typically >9 hours |
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Battery Charging: |
Internal NiCd fast charger circuitry
N.B. Charger may be disabled for dry cell operation |
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Power Adapter |
Universal input voltage range 100-240Vac, 47-63Hz |
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General |
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Analogue Output: |
0 to 2.5 VDC FSD, 500ohms output impedance |
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Keypad: |
7 key tactile membrane |
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Weight: |
Instrument only=0.97Kg (complete kit in carry case 4.5Kg) |
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Dimensions: |
Probe= 35mm 0 x 290mm total length
Instrument HxWxD=245 x 95 x 50 mm
Carry Case HxWxD=135 x 490 x 370 mm |
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Display |
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Display: |
128 x 64 pixel LCD graphics panel with backlight |
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Display Values |
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Instantaneous reading: |
Rolling average concentration over a user selectable period (1 to
60 seconds) |
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Time Weighted Average: |
Average concentration since power on or reset |
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Maximum value: |
Maximum concentration since power on or reset |
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Scrolling Graphs: |
Real time graphs of dust concentration
Selectable time-base periods of 100/200 seconds, 15 minutes or 60
minutes
Y Axis may be auto-ranging or fixed |
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Battery voltage: |
Battery Voltage with status icon |
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Calibration |
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Factory Calibration: |
Traceable isokinetic technique (wind tunnel) and ISO 12103-1, A2
fine test dust
Dust box calibration for high concentrations |
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User Calibration: |
Four user defined calibration settings available |
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Routine Calibration: |
Software calibration for zero and span setting
Optical calibration filter supplied (restores factory calibration) |
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Data Logging |
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Internal Memory: |
64k EEPROM providing 15,700 data points |
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Logging Interval: |
Adjustable from 1 to 600 seconds |
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Recorded Values: |
Individual, average and max/min concentrations over logging
period |
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Serial Interface: |
RS232 up to 38.4k baud
IrDa (Future expansion/ optional extra) |
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Software |
Windust pro provides a friendly graphical interface for
instrument configuration, data download and graphical report
presentation. |
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Operating System: |
Microsoft Windows 95, 98 or NT |
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Requirements: |
IBM compatible Pc with RS232 serial port, 8Mb RAM, FDD, HDD, VGA
color graphics |
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