Chapter 6
Maintenance and service
OsmoTECH XT Single-Sample Micro-Osmometer Service Guide
46
5.
Place a sampler tip on the sampler to help you place
new wire correctly.
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, follow the instructions under
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 set-screw with the calibration
gauge.
9.
Screw the calibration gauge and key back into the
top of the sampler.
Your 20-
μ
L sampler is now calibrated and ready to use.
NOTE:
For best results, follow the instructions under
Verifying the sampler calibration
to confirm that
the sampler is calibrated correctly.
Fixing a too-tight fit
1.
Place the wire end into the back end (large
diameter) of the sampler tip.
Sampler tip
Sampler
plunger
wire tip
2.
Install the sampler plunger wire and tighten.
3.
Move the sampler tip in a back-and-forth motion
over the plunger wire and tip until the fit is
acceptable.
4.
Remove both parts and re-assemble normally.
Verifying the sampler calibration
Perform this verification procedure after you replace the
sampler plunger wire, or any time you want to confirm
that the sampler is calibrated correctly.
1.
Place a new sampler tip on the sampler.
2.
Unscrew the calibration gauge and key.
3.
Insert the key end of the calibration gauge into the
sampler tip.
4.
Visually inspect the position of the end of the
sampler plunger wire tip and the end of the
calibration key.
NOTE:
There should be no gap between the two.
5.
If necessary, reset the sampler plunger wire as
described above.
6.5 Service
For instructions on how to replace defective parts in an
OsmoTECH XT, refer to replacement part instructions.
NOTE:
Some service procedures require you to access the
interior of the instrument. For instructions on
removing and reinstalling the OsmoTECH XT
cover, refer to Replacement Procedure
235000PM, Instruction, Disassembly and
Reassembly - OsmoTECH XT.
Depending on the service performed on the instrument,
you may need to reconfigure its settings and/or
recalibrate it. Such requirements are noted in the specific
service procedure.
