TSI Instruments SIZER 3321, User Manual

Page: 93 / 101

D-1
A P P E N D I X D
M o d e l 3 3 2 1
S p e c i f i c a t i o n s
The following specifications
—which are subject to change—list the most
important features of the Model 3321.
Table D-1
Specifications of the Model 3321 Aerodynamic Particle Sizer
®
(APS
™
) Spectrometer
Measurement technique ....................... The time-of-flight of individual particles is measured in an accelerating flow field.
Processing electronics measure the time-of-flight of the particle using a single
high-speed timing processor. Phantom particle rejection is achieved through the
use of a patent pending double crested optical system. The particle size binning
is based on an internally stored calibration curve.
Particle Type ........................................ Airborne solids and non-volatile liquids.
Particle Size Range .............................. 0.5 to 20

m aerodynamic size, 0.3 to 20

m optical size (PSL equivalent)
Maximum Particle Concentration .......... 1000 pt/cm
3
at 0.5 µm with less than 5% coincidence. 1,000 pt/cm
3
at 10.0 µm
with less than 10% coincidence. Usable data up to 10,000 pt/cm
3
.
Display Resolution ................................ 32 channels per decade of particle size (logarithmic). This results in 52 channels
total. 1,024 bins of raw time-of-flight data (4 nsec per bin) in uncorrelated mode.
Resolution ............................................ 0.02

m at 1.0

m diameter. 0.03

m at 10

m diameter.
Sampling Time ..................................... Programmable from 1 second to 18 hours.
Flow Rates ........................................... Total flow: 5.0 L/min ±1%, Sheath flow 4.0 L/min ±1%, Aerosol Sample 1.0 L/min
±10% (feedback controlled).
Atmospheric Pressure Correction ......... Automatic correction between 400 and 1,030 mbar (full correction between 700
and 1,030 mbar).
Concentration Accuracy ....................... ±10% of reading plus variation from counting statistics.
Operating Temperature ........................ 10 to 40°C (50 to 104°F).
Operating Humidity ............................... 10 to 90% RH non-condensing.
Laser Source ........................................ 30 mW, 655 nm laser diode.
Detector ................................................ Avalanche photodetector (APD).
Front Panel Display .............................. 320 by 240 pixels.
Power ................................................... 100 to 240 VAC, 50
–60 Hz, 100 W, single phase or 24 VDC.
Communications ................................... RS232 (9-pin) port, 7 bits, even parity, 9600:19200:38400 baud.
Outputs ................................................. Digital I/O: 15-pin port (3 input, 3 output). Analog and digital pulse: BNC.
Configurable analog: BNC.
Dimensions (HWD) ............................... 18 cm

30 cm

38 cm (7 in.

12 in.

15 in.)