Environmental Express SPE-Express with Cover - Manual (Page 40)

SPE-­‐Express
Operation
and
Instruction
Manual
www.envexp.com 39
5.4 Replacing the Lower Glass Chamber
• Replace barb fittings into the upper and lower solenoid ports with a 7/16" wrench (do not over-
tighten fittings).
• Place the bottom port of the lower glass chamber around the tube on the sample release solenoid
and hold in place.
• Replace the bottom black nut to attach the sample release port to the lower glass chamber.
• Using a 5/32" Allen wrench attach the clamp behind the lower glass chamber by screwing the 2
screws all the way down (hand tight) and then backing the screws one rotation. DO NOT
OVERTIGHTEN THE SCREWS! The lower glass chamber should still be able to slightly wiggle.
• Attach the Nitrogen line to the back side arm of the glass chamber by inserting the tube into the
back side of the black nut and then into the O-ring. Insert the tube into the back port of the glass
chamber approximately 1 inch and tighten the nut to the glass.
• Attach the Hexane Chamber line to the front side arm of the glass chamber by inserting the tube
into the back side of the black nut and then into the O-ring. Insert the tube into the front port of
the glass chamber approximately 1 inch and tighten the nut to the glass.
• In the manual screen in the SPE-Express software, turn on the vacuum by pressing the “Vacuum
Solenoid” button. Push the lower glass chamber up to the upper glass chamber and slowly
remove support from the lower glass chamber (be careful not to allow the lower glass chamber to
fall freely). If the lower glass chamber has been re-attached correctly it will stay seated on the
upper glass chamber and the glass clamp can be put into place. If the lower glass chamber has
not been re-attached correctly it will not stay seated on the upper glass chamber and needs to be
re-adjusted (try slightly loosening the glass clamp screws and check that all nuts are fully
tightened). Check the tightness of the lines to insure there are no leaks.
5.5 Recalibrating the Fluid Sensor
The sensor on the back wall of the each station is used to detect when the sample bottle is dry enough to proceed
with elution procedures automatically during the test. Periodic recalibration of the sensor is recommended to
ensure accurate operation. To complete the recalibration procedures:
• From within the station, unscrew the nut within the upper glass chamber plug (this is the nut
which connects the tube from the station valve to the upper glass chamber).
• Remove the top panel with filter adapter and latch by unscrewing the 4 panel screws using a
5/64" Allen wrench.
• Twist the luer fitting of the waste lines clockwise and remove the tubing from the valve. (This step
may also be completed prior to removing the upper panel).
• Unplug the 4 plugs connecting the wiring from the panel valve and latch from the receptacles
along the right wall of the station.
• Set the upper panel assembly aside. Care should be taken not to allow foreign debris to enter into
the filter adapter, use the rubber plug provided with the unit if possible.
• Unscrew the left sensor nut on the body of the sensor (toward the orange sensor head) so that the
sensor can slide back from the water miscible waste line tube (far enough to switch out the tube).
• Remove water miscible waste tubing from the tubing holder on the mount.