Advanced Instruments 3320, User Manual

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Advanced ® Micro-Osmometer Model 3320 User’s Guide
38
Sampler plunger wire replacement and
verification
To ensure proper instrument operation, you should replace the sampler
plunger wire of the sampler every 500 tests (or every package of sam-
pler tips).
To replace the sampler plunger wire, use the following procedure.
1. Unscrew the calibration gauge and key.
2. Rotate the sampler shaft until the calibration setscrew appears
beneath the access hole in the side of the sampler body.
3. Place the key end of the calibration gauge in the access hole and
turn counter-clockwise to loosen the setscrew.
4. Carefully remove the old sampler plunger wire.
5. Place a sampler tip on the sampler to help you place new wire cor-
rectly.
6. Slip the sampler plunger wire into the sampler tip so the Teflon
plunger tip protrudes about 1/16
”
or 1.6 mm from the end of the
sampler tip.
Note If the sampler plunger wire cannot be placed into the sampler tip
without using excessive force, see step 10.
7. Using the key end of the calibration gauge, push the sampler
plunger wire into the sampler as far as it will go.
8. Tighten the calibration setscrew with the calibration gauge.
9. Screw the calibration gauge and key back into the top of the sam-
pler.
10. If the sampler tip does not fit over the new sampler plunger wire
without using excessive force, place the wire end into the back end
(large diameter) of the sampler tip (see Figure 13, alternate step 10).