Environmental Express SPE-Express with Cover User Manual
Page 12
SPE-‐Express Operation and Instruction Manual
www.envexp.com
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If the unit is in a highly acidic or corrosive environment it is recommended that the flow control valve be
turned on. Note that when the flow control valve is on it will continue to supply Nitrogen as long as the
source Nitrogen is supplied to the back of the unit even if power is off. To adjust the flow control valve:
•
Ensure the SPE-Express power switch is in the OFF position.
•
Remove supply pressure from the unit by unfastening the supply hoses on the back of the unit.
•
Remove the back cover of the unit by unscrewing the thumbscrews.
•
Locate the flow control valve on the middle wall of the unit. It will be within the right fluids
chamber and has a tube which connects to a barb within the wall leading to the left electronics
chamber.
•
Loosen the lock nut on the front of the valve and adjust the metering needle counterclockwise
using a 3/32
"
Allen wrench. The valve SHOULD NOT be adjusted past a ¾ turn counterclockwise.
•
Tighten the lock nut toward the body of the valve to reduce the probability of unwanted
adjustment.
•
Replace the back cover of the SPE-Express unit with the thumbscrews.
•
Reattach the Nitrogen supply hoses.
2.2.7
Connecting Two Units
When operating two SPE-Express units from one computer use the G8050 Dual Unit Assembly Kit to make
the following modifications. The kit includes an additional reagent tubing kit and a dual unit coupler
panel.
•
Reagent Tubing – This kit will attach to the standard reagent tubing kit, and includes a “Y”
connector to attach both units. Follow the instructions in 2.2.2 to connect each of the three ends
to the standard reagent tubing kit and the instruments.
•
Exhaust Port and Fan – Both instruments must have the same exhaust fan/outlet configuration.
Use the dual unit coupler panel to connect the two units together. Use a 5/64" Allen wrench to
remove the blocking cover that is between the two units. Attach the dual unit coupler panel in
place of the removed blocking cover. Slide the two units together so that the exhaust from the
second unit is inside the dual unit coupler.
Additional Steps:
•
USB Cable – Connect each SPE-Express to the computer using a separate USB cable to a separate
USB port on the computer. Do not use USB cables longer than 10 feet.
•
Nitrogen Source – Both units can be run from a single nitrogen source. Use a “T” fitting (not
included) to split the line to provide a connection to each instrument. Only one unit should be
used to supply nitrogen to the reagents. The other unit should have this connection left unused.
•
If the software previously operated a single unit you must rerun the Configuration option in order
to set up for two units. Always use the system on the left as unit 1 and the system on the right as
unit 2.