WPI Nanoliter 2000, Инструкция по эксплуатации

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Nanoliter 2000
World Precision Instruments 11
MAINTENANCE
Replacing O-Rings
After a period of time or heavy use, you may observe some leakage
around the seals. To correct this, replace the O-rings. Replacement O-rings
are included with your
Nanoliter 2000
. Additional O-rings (WPI #
5340
)
may also be ordered. See “Securing the Micropipette to the Injector” on
page 7.
Fig. 5
shows the proper installation configurations. Correct
orientation of the O-rings is critical for proper operation.
Replacing the Wire Plunger
Refer to Fig. 4 on page 5 to see the exploded diagram of the Nanoliter
2000 injection handle.
1. Verify that the plunger is in the home position.
2. Unscrew the collet one turn and remove the O-rings.
3. Hold the motor housing with one hand while loosening the aluminum
barrel. To remove it, unscrew it counter-clockwise with your other hand.
This exposes a brass fitting with two Allen screws on opposite sides of
the brass fitting and the clear stop.
CAUTION
: Do NOT disassemble the Motor Housing. Doing so may
damage the plunger drive assembly.
4. Using the 0.05” hex wrench provided with the replacement plunger,
loosen the two set screws.
NOTE : The 0.035” hex wrench is for use with the Nanoliter 2010.
5. Remove the plunger.
6. Insert the new plunger and tighten the set screws snugly. Do NOT
overtighten. Set screws must be flush with the edge or the aluminum
barrel will not seat properly.
NOTE
: The pointed end of the plunger is normally oriented out, be it
can be inserted either way.
7. Slide the clear stop over the plunger so that the narrow side is toward
the brass fitting. This stop prevents the plunger from advancing too far
into the aluminum barrel.
8. Slide the aluminum barrel over the tip of the plunger. Hold the handle
so the plunger is point straight up. Gently shake the unit until the barrel
hole lines up with the plunger and slides down over it.