14
14
Section 7
LOW FLOW TUBE SAMPLING (5 to 800 cc/min.)
Using the setup as shown above, flows of 5 to 800 cc/min.
may be collected in adsorbent tubes (charcoal, silica gel,
etc.). NOTE: first set up sorbent tube in Tube Holder with
proper tubing before turning pump on.
Low Flow Sampling Procedure:
1. The pump must be in PRESSURE MODE
under Flow Adj. MENU. Arrow the flow
below 800 cc/m. This will place the pump
in Pressure Mode and turn on the pump motor to
operate at a set speed.
2. Using the mini-BUCK Calibrator M1 (0.1 to 300 cc/min.)
or M5 (1 to 6000 cc/min.), measure the flow through the
adsorbent tube as shown above. Use a screw driver to
adjust the flow to the desired rate.
3. Once the sample flow rate has been set, press the SET
and Arrow key to match the measured flow on the
Calibrator. An accuracy flow of ± 5% will be maintained
throughout the sampling day. In Run Mode the flow rate
will be displayed and the accumulating volume will be
accurate.
4. Some new higher flow thermal desorption with higher
backpressure tubes may be used in “Constant Flow”
Mode with the non-adjustable tube holder (P.N. APB
-109032) for flow above 800 cc/min.
OFF
ON
A PRIMARY
FLOW RATE
BUCK
STANDARD
RANGE 1 CC/MIN - 6000 CC/MIN
By
A.P. BUCK, INC.
Orlando, Florida
mini-
CALIBRATOR
UNIVERSAL LOW
FLOW HOLDER
AIR FLOW
BUCK-BASIC
BASIC-5
HOLD
ON
OFF
ENTER
GAS
FLOW
THE
11
11
Section 4
Содержание BUCK-Libra Plus LP-5
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