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6.3 PILS Chassis
Steam Generator System
The steam generator system consists of four basic parts: the peristaltic pump that sup-
plies liquid flow to the heater, the heater itself, the steam injection tip and the temper-
ature controllers mounted in the front of the instrument.
Peristaltic Pump
One important function of the peristaltic pump (see figure 6) is to feed the steam gen-
erator a controlled amount of MilliQ water to generate steam. The other channels of the
pump are used to supply the PILS droplet impactor washflow, withdraw the liquid sam-
ple flow from the PILS, and to draw waste water from the PILS body. The potentiometer
setting at the front of the PILS, just below the temperature controllers, controls the ro-
tational speed of the peristaltic pump. Only adjust the potentiometer while measuring
the steam generator liquid flow rate with a graduated cylinder and stop watch or with
some other liquid flow measuring device.
Note: The peristaltic pump turns clockwise when viewed from the front facing the
PILS chassis front panel. Be sure to install the white, tube-holders so the tensioners
are on the left side of the pump.
The figure shows the flow input side of the pump on the left and the flow output side
on the right. Note the correct orientation of the colored peristaltic pump tubing stop
tabs facing downward to prevent twisting of the tubing inside the pump. The grey-grey
collared tubes are waste lines, the orange-white collared tubes are washflow and liquid
sample out flow lines, the red-red line is the steam generator supply line.
83-00009-01A
PILS 4001-115V and 4001-230V
Page 20 of 74
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