APPENDIX
D
Special Application Notes
Instructions
1
For best precision, use the smallest holder that can accommo-
date the sample volume without danger of contaminating the
thermocouple.
2
Calibrate the instrument. Use the same size sample holder as
will be used for the assayed sample. Match the volume and
shape of the subject sample and the calibration solution as
closely as possible. Several filter paper discs saturated with
standard solution should be used for calibration to dampen the
motion of the solution and to approximate the size and shape
of the sample material.
3
Select Process Delay Mode. This allows you to delay the mea-
surement cycle after closing the chamber until you press
ENTER.
4
Place the sample in the sample holder. Push the sample hold-
er into the chamber and close the chamber.
Solid (or some viscous) samples require extended periods to reach
equilibration inside the chamber. On such samples you may want to
make repeated measurements without opening the chamber to
determine the time required to achieve equilibrium. Osmolality val-
ues will trend downward until they stabilize. If you know the required
time, simply defer the measurement for that period.
86
CAUTION!
Never load any sample that extends above the lip of the sample holder.
Solid sample material extending above the lip of the sample holder can
severely contaminate or even break the thermocouple.
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