TSI Instruments 3772 - APPENDIX A Specifications; Model 3772;3771 CPC Specifications

A-1
A P P E N D I X A
Specifications
Table A-1 contains the specifications for the Model 3772/3771
Condensation Particle Counter (CPC). These specifications are subject to
change without notice.
Table A-1
Model 3772/3771 CPC Specifications
Particle size range
Min. detectable particle (D
50
) ............
Max. detectable particle ....................
10 nm, verified with DMA-classified sucrose particles
> 3 mm
Particle Concentration Range ........
0 to 10
4
particles/cm
3
, single particle counting with
continuous, live-time coincidence correction that can be
turned off
Particle Concentration Accuracy ...
±10% at <10
4
particles/cm
3
Response Time ................................
3.0 sec to 95% in response to concentration step change
Aerosol Flow Rate ...........................
Flow source .......................................
Flow control .......................................
1± 0.05 L/min
External vacuum
Volumetric flow control of aerosol flow by internal critical
orifice; Differential pressure across critical orifice is
monitored.
Operating Temperatures
Saturator ...........................................
Condenser .........................................
Optics ................................................
39°C ±0.2°C
22°C ±0.2°C
40°C ±0.2°C
False Background Counts ..............
<0.001 particle/cm
3
, based on 12-hr average
Aerosol Medium ..............................
Recommended for use with air; safe for use with inert gases
such as nitrogen, argon, and helium (performance
specifications are for air)
Environmental Operating
Conditions .......................................
Indoor use
Altitude up to 2000 m (6500 ft)
Inlet (Ambient) pressure 75 to 105 kPa (0.75 to 1.05 atm)
Operating temperature range 10 to 35°C
Safe temperature range 5 to 40°C
Storage temperature range -20 to 50°C.
Ambient humidity 0 to 90% RH noncondensing
Pollution degree II
Overvoltage category II
Condensing Liquid
Working fluid .....................................
Filling system ....................................
Water removal ...................................
Reagent-grade n-butyl alcohol (butanol, not included)
Electronic liquid-level sensor initiates automatic filling as
needed, requires connection to fill bottle
All condensate is collected and removed automatically by a
constant-flow-rate micropump, may be switched on for use
in humid environments