TSI Instruments SIZER 3321 - DC Power Input; Pump Exhaust; 24 V DC Power Input Pin Designations; Power Connections for 24 V DC Power Input

3-6 Model 3321 Aerodynamic Particle Sizer

Spectrometer
DC Power Input
The DC power connector is a quarter-turn quick-connect entry point that
allows you to power the APS™ spectrometer with a 22 to 26 VDC (24 VDC
nominal) 4A max. power source. This power could be supplied by aircraft
power or two 12 VDC automotive batteries in series. Contact TSI for the
adapter cable (TSI P/N 1035551), and instructions on using this power
method.
1
2
4
3
Figure 3-4
24V DC Power Input Pin Designations
Table 3-1
Power Connections for 24V DC Power Input
Pin Number Signal
1 GND Chassis GRN/YEL
2 +24V Blue
3 GND Brown Shield
4 Chassis Shield
Pump Exhaust
Sample aerosol is exhausted through the Exhaust Port.
The pump exhaust connector is a ¼-inch Swagelok-style connector that
allows control of the exhaust flow. The exhaust can be vented to a hood or
connected in line to equalize pressure when sampling from a chamber or in
an aircraft. The exhaust flow is 5 to 6 L/min. Make certain the exhaust tube
allows the exhausted sample to flow freely (check for crimps and
constrictions).
If the aerosol sample is exhausted without tubing, make certain you do not
block the Pump Exhaust.