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7.3 Tubing Connections
for your application. The nominal liquid flow rate of the peristaltic pump tubing in-
stalled at the factory (orange/red tubing stops) is between 0.4 and 0.5 ml/min. If a slightly
lower flow rate is required, a tee fitting may be installed on the PEEK line and a small by-
pass (dump) flow delivered to the PILS Drain Bottle through a metering valve. If a much
lower flow rate is required, the "PILS-LowFlowKit" is offered as an accessory so that
flow rates as low as 0.03 ml/min can be attained. Contact BRECHTEL if you require a
broader selection of tubing.
Vacuum Pump
Connect the vacuum pump to the 3/8" swagelock connector labeled 'VACUUM' on the
rear panel of the PILS using the tubing provided in the ship kit. Reference figure 18.
If you supply your own vacuum source be sure it is compatible with the high
water vapor content of the PILS exhaust flow.
Sample Flow
Connect your sample air inlet tube (1/2" outside diameter) to the compression fitting
connector labeled 'Sample Inlet' on the PILS back panel or to the inlet of the impactor.
Ensure the connection is tight and leak free. A short, 1/2" diameter stainless steel tube
is provided in the ship kit for use with conductive silicon tubing if desired.
Auto-collector
During normal ground-based operation, the Auto-collector is placed to the side of the
PILS on a table top. For rack mount applications, the user may attach the aluminum
baseplate to a rack shelf using a minimum of four 10-32 screws (or larger) that pass
through the aluminum baseplate of the Auto-collector.
The PEEK liquid sample outlet tubing from the peristaltic pump is attached to the PEEK
union in the back of the auto-collector needle assembly so that liquid flows from the
PILS to the needle (see figure 19).
83-00009-01A
PILS 4001-115V and 4001-230V
Page 42 of 74
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