Manual

Setting or Verifying Flow Rate

For a diagram of the pump, see Figure 1, page 5.

Before use, allow pump to equilibrate after moving it from one

temperature extreme to another.

Ensure pump has run for ﬁ ve minutes before proceeding with

calibration.

Connect a single adjustable low ﬂ ow holder (Figure 3) to the pump

intake (Figure 2, #9) using 1/4-inch Tygon tubing.

Insert an opened sorbent tube (Figure 3, #3) into the rubber sleeve

(Figure 3, #2) of the low ﬂ ow holder with the arrow on the tube

pointing toward the holder.

Connect a calibrator to the exposed end of the sorbent tube.

Loosen the brass ﬂ ow adjust screw on

the low ﬂ ow holder. Activate the pump

by pressing Flow and Battery Check.

Adjust the ﬂ ow rate by turning the

ﬂ ow adjust screw (Figure 3, #1) on the

holder until the calibrator indicates the

desired ﬂ ow.

Do not adjust the ﬂ ow on the

pump. Adjust the ﬂ ow only by

using the ﬂ ow adjust screw on

the low ﬂ ow holder.

When the desired ﬂ ow is set, place

pump in Hold by pressing Flow and

Battery Check. Disconnect the calibrator.

Figure 3

Single Adjustable

Low Flow Holder

with sample tube

1 Flow adjust screw

2 Rubber sleeve

3 Sorbent tube

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Airﬂ ow

Calibration train with

tube in low ﬂ ow holder

Flow adjust

screw

Turn screw on

low ﬂ ow holder

to adjust ﬂ ow.

continued on page 12

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