Environmental Express AutoBlock II - Manual (Page 8)

8
2.2 Reagent Line Installation
The following steps will connect your 2.5 liter reagent bottles to the AutoBlock.
These bottles are your standard 2.5L acid bottles. For the DI port use a cleaned
acid bottle filled with DI.
2.2.1 Components for Reagent Uptake
(A) Inlet Ports
Inlet Ports are located (and labeled) on the right panel of the AutoBlock.
These Teflon fittings attach reagent uptake lines to the AutoBlock.
(B) Teflon Nuts for Inlet Ports
The Teflon Nuts are located in the Spare Parts Bag. These nuts secure the
reagent uptake lines to the ports.
(C) Vented Reagent Caps (optional)
A pack of 5 vented reagent caps, green in color. (For the dual system 10 caps
are needed). Attach these to your 2.5 liter reagent bottles in the reagent rack.
(D) Reagent Uptake Lines
25 feet of small bore Teflon tubing has been included (2-25’ tubing rolls for
dual system). Begin by cutting this into five 5’ sections. Cut each line
squarely. These sections will become your reagent uptake lines.
2.2.2 Assembly of Reagent Uptake Components
(A) Loosen the nut on top of a vented reagent cap. Insert one end of a reagent
uptake line though the nut until it reaches the bottom of the 2.5 liter bottle.
Hand tighten the nut.
(B) From the spares box, take out one pack of 1/8" nuts and one pack of 1/8"
ferrules. Please note that the nut has a threaded end and a knurled end. The
ferrules consist of two pieces. The first piece is a metal ring with the edge of one
end tapered and the other flat. The second piece is a stepped Teflon ring with one
end a slightly larger diameter than the other.
Make sure that the end of the 1/8" Teflon reagent line that will connect to the
Autoblock is cut cleanly and square. Slide onto the reagent line in the following
order, one 1/8" nut knurled end first, one metal ring ferrule flat end first , and one
Teflon ferrule smaller diameter first.
Next, gently push the end of the reagent line into the desired inlet port until the
tubing bottoms out. Carefully slide the nut up the regent line until it is at the port.
Finally, finger tighten the nut. As the nut is tightened, it will push the ferrules
along the regent line. When the ferrules reach the end of the line, the continued
tightening of the nut will push the tapered end of the metal ring ferrule over and