Download AS40 Autosampler Manual

5 • Service
12. Slide the tubing through the red plastic tubing guide at the base
of the sampling mechanism, down into the compartment where
the bleed valve is located.
13. Once again, turn the sampler on its left side. Install the fitting
and a new gripper (P/N 030509) on the free end of the tubing so
that the finished length is 60 cm (24 inches) (as indicated by the
mark made in step 9). See Section 5.1.1 for gripper fitting
installation instructions.
14. Screw the fitting into port 1 of the bleed valve. Tighten the
fitting fingertight, then an additional one-eighth turn.
15. Press the valve back into its mounting clip and return the
sampler to its upright position.
16. Reinstall the sampling head cover panel.
17. The AS40 is ready to use.
5.3 Cleaning a Valve Slider
A dirty or plugged bleed valve slider will cause excessive backpressure in the sample vial and may cause the sampler to go to
the Hold state and stop.
1. Locate the Default Set switches on the rear panel and set switch
10 to the Test position (see Figure C-1). This allows the bleed
valve to be operated manually using the Bleed Off/On switch on
the front panel.
2. Place the sampler on its left side, exposing the bleed valve in its
compartment in the right front corner of the AS40 chassis. The
bleed valve is accessible only from the bottom of the AS40.
Remove the valve from its mounting clips for access to the valve
components.
3. Disconnect the air line from one end of the valve.
4. Unscrew one cap from the valve body. Be careful not to lose the
cap O-ring.
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