Manual, Ultra High Sensitivity Aerosol Spectrometer (UHSAS)
DOC-0210 Rev E-4
9
© 2017 DROPLET MEASUREMENT TECHNOLOGIES
1.2 Specifications and Features
Technique: Aerosol spectrometry
Auxiliary Parameters:
Temperature
Pressure
Derived Parameters: Particle diameter
Number Concentration Range: 3,000 per second
Particle Size Range: 0.06 – 1 µm
Aerosol Medium: Air, 0 - 30 °C (32 - 86°F)
Counting Efficiency: 99%
Lasers:
•
Solid-state N
d
3+
:Y LiF
4
: ~1054 nm, 1 kW/cm
2
intracavity circulating power
•
Pump Laser: ~797 nm, 1.6 W.
Number of size bins: 100 max:
•
99 standard bins (98 if both overflow and
underflow are enabled)
•
One overflow bin and one underflow bin
Flow Range:
•
Standard sample flow: 1 – 100 Sccm
(typically 50); other options available.
•
Sheath airflow setting: 700 ccm at sea-level,
590 Sccm in Boulder, CO
Flow Control: Controlled from software; can also be manually
adjusted via mass or volume flow controller
Routine Maintenance:
Daily:
•
PSL size check to monitor laser power
•
Zero check with high-efficiency filtered air
sample
Monthly and around field campaigns:
•
Full-scale calibration
Annually:
•
Flow controller calibration
Recommended Service: Annual cleaning and calibration at DMT service
facility
Data Recording:
•
Output file written to computer hard drive
•
Output data sent to serial port (optional)
