Casella CEL Microdust Pro real time dust monitor - Manual (Page 42)

MicroDust Pro Aerosol Monitoring System
42 Casella CEL
The aspirator fan operates from a 5 V DC power supply, which can come from a
suitable mains DC adapter or from a battery supply.
You should clean the aspirator regularly to make sure there is no accumulation
of dust, which can cause measurements errors or mechanical seizure of the fan.
7 Specifications
7.1 Instrument specification
Measurement
Sensing technique Forward light scattering (12° to 20°) using infrared
source (wavelength 880 nm)
Measuring range 0.001 to 2500 mg/m³ over four ranges:
• 0 to 2.5 mg/m³
• 0 to 25 mg/m³
• 0 to 250 mg/m³
• 0 to 2500 mg/m³
The active range can be fixed or auto ranging.
Resolution 0.001 mg/m³
Zero stability Typically <2 µg/m³/°C
Span stability ±0.7 % of reading/°C
Temperature:
Operating 0 °C to 55 °C (non-condensing)
Storage –20 °C to +55 °C (non-condensing)
Power supply
Power consumption Approximately 100 mA at 6 V
Battery Four AA / MN1500 cells
Alkaline or rechargeable NiMH
Operating run time on batteries:
Alkaline (2700 mAh) Typically >20 hours
NiMH (950 mAh) Typically >9 hours