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Look into the mode indicator window on the side of the sampler to see that the indicator is
black or white, depending on the mode desired.Continue turning the selector switch counter-
clockwise until the desired mode has been set. Now, lock the rotor into position by rotating the
key clockwise - a half turn.Tighten Gently - Do Not Overtighten!
The samplers mode indicator will have appeared either black for "Constant-Flow" or white for
"Constant-Pressure".TurnthepumpON.Tocheckifthepumpisin"Constant-flowmode,hold
your finger over the Pump Inlet Boss (10), the samplers Fault Light will illuminate in
approximately 3-5 seconds. This signal means that the sampler is operating properly in the
"Constant-flowmode.NOTE:Ifthepumpissetataverylowflow(i.e..10cc/min.),itmaytake
10 seconds for the Fault Indicator LED (7) to illuminate.
3.2 Constant Flow Sampling:
First, make sure that the pump is in the Constant-flow mode. If needed, follow the
procedures explained in Section3.1 to achieve the "Constant-flow" mode.
Connect one end of the 1/8" ID tubing to the Pump Inlet Boss (10) and the opposite end to
the inlet boss of the Flow Controller Tube Holder Assembly.
NOTE:Each LFS-113D-DK& DC-DKkit comesequipped witha specialDual ManifoldTube
HolderKit(B-800148). Thiskitwasdesigned to sampletwo(2) standard 6mmx70mm sorbent
tubes when used in the "Constant-pressure" mode. However, when sampling in the "Constant-
flow" mode, you may use only one (1) Sorbent Tube Cassette.
Unscrew one of the tube cassettes from the Flow Controller Manifold. Remove one Tube
Holder End (p/n 800062) and slip the Collar Clip (800135) over the Tube Holder Housing
(200102). Install the desired sorbent tube with the arrow, (printed on the tube) pointing in the
direction of the air flow path. Replace the end and insert the additional Hose Barb Fitting
(800170). Connect the tubing from the Pump Inlet Boss (10) to the Hose Barb on the end of the
tube holder cassette.
For complete instructions, please refer to the instruction sheet for the "Universal Tube
Holder System",(Form no. FPRO-1218).
Turn the sampler ON. The sampler will run and the green Battery Check LED (6) will
illuminateindicatingthatthesamplercanbeusedfor8hoursundermaximumloadconditions.(If
the green light does not illuminate, the sampler may still be capable of running for an eight (8)
hour period, if not subjected to maximum load conditions).
NOTE: During normal sorbent tube sampling, the LFS system is used at approximately 50% of
it’s maximum capacity.
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Settingflowinthe"Constant-flow"modeisaccomplishedbyadjustingtheflowadjustvalve
located on the front of the sampler. To set the flow, connect a piece of 1/8" ID tubing from the
inletoftheFlowControllerTubeHolder,tothesuctionsideofalowrangerotameter,(seefigure
4). Adjust the flow by inserting a small blade screwdriver into the recess marked Flow Adjust
(9)-engagethebladeofthescrewdriverwiththeslotoftheFlowAdjustValveandslowlyrotate
the valve clockwise to decrease flow or counter-clockwise to increase flow.
Once the flow has been established, allow the sampler to run for approximately one minute
to reach flow stability. A quick check of the fault system should be performed by blocking the
inlet to the pump and observing the activation of the Fault Indicator (7). Maintaining the
blockage for 20-40 seconds will cause the pump to cease and the time to latch. If the blockage
is removed prior to completion of the fault time activation period, the light will extinguish and
the pump will continue to run normally.
3.3 Multiple Flow Sampling:
Set the Mode Select Switch (4) to the "Constant-pressure" mode,( see Section 3.1 for
complete Mode Selection procedure). In this mode, the internal control valve is inoperative.
Attach the 1/8" ID tubing to the Flow Controller Manifold outlet boss (single, dual, triple
orquad),(seefigure5).ConnecttheoppositeendofthetubingtothebossofthePumpInletFilter
(2). Remove the protective end caps covering the Flow Adjust Valves of the Flow Controller
Manifold.Installthedesiredsorbenttube(s)withthearrow,(printed on thetube) pointinginthe
direction of the air flow path.Reassemble each sorbent tube cassette and install a boss into the
tube holder end of each cassette position if necessary. NOTE:For complete tube holder
assembly instructions, please refer to the "Universal Tube Holder System" sheet for description
and set-up.
Turn ON the sampler. The sampler will run and the green Battery Check LED (6) will
illuminate indicating that the sampler can be used for eight (8) hours under maximum load
conditions.(If the green light does not illuminate, the sampler may still be capable of running
for an eight (8) hour period, if not subjected to maximum load conditions).
NOTE: During normal sorbent tube sampling, the LFS system is used at approximately 50% of
it’s maximum capacity.
Connect a second piece of 1/8" ID tubing from the inlet boss of a sorbent tube cassette
position,to a rotameter,( seefigure 5). Adjusttheflow throughthesorbent tubebyadjusting the
Flow Control Valve located at that cassette position.Slowly rotate the valve clockwise to
decrease flow or counter-clockwise to increase flow.
Repeat this procedure for each of the sorbent tube holder positions by removing the tubing
from the inlet boss and reattach to the inlet boss of the next desired cassette position. NOTE:
In the "Constant-pressure" mode,the total cumulative flow of all the flow controller valves,
