A-2 Model 3775 Condensation Particle Counter
Table A-1
Model 3776 CPC Specifications
Environmental operating
conditions ...........................
Indoor use
Altitude up to 2000 m (6500 ft)
Inlet 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 0–90% RH noncondensing
Pollution degree II
Overvoltage degree 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
Communications
Protocol ..............................
Interface.............................
Command set based on ASCII characters
RS-232, 9-pin, “D” subminiature connector, pinouts
compatible with standard IBM-style serial cables and
interfaces
USB, type B connector, USB 2.0 compatible at 12 MB
Ethernet, 8-wire RJ-45 jack, 10/100 BASE-T, TCP/IP
Data logging and storage ......
Averaging interval...............
SD/MMC flash memory card
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, or 60 seconds (set from
front panel), software provides more averaging options
Analog inputs ....................... Two BNC connectors, 0 to 10 volts (data recording for
external sensors)
Outputs
Digital display ....................
Analog................................
Pulse ..................................
Graph of concentration vs. time, concentration, time and
total counts, status (temperatures, pressures, laser power,
aerosol flow, etc.), and user settings
BNC connector, 0 to 10 volts, user-selectable function
output (linear/log concentration or DMA voltage control)
BNC connector, TTL level pulse, 50-ohm termination,
nominally 2.5 microseconds wide
Software ............................... Aerosol Instrument Manager® software (RS-232 and USB
compatible)
Calibration ........................... Recommended annually
Power requirements.............. 100 to 240 VAC, 50/60 Hz., 335 W maximum
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