User`s manual

28 Chapter 4: Hardware Description
Calorimetry Sciences Corp.
CSC 5300 N-ITC III 29
User’s Manual
Power Supply
The calorimeter has an autosetting power supply which may be used with input voltage
ranges of both 90-130 VAC and 180-260 VAC, 47-63 Hz. No manual changes to the
instrument are required when switching from one power source to another, except for
the frequency setting in the ITCRun software (see Chapter 5: Software Description). The
power supply has four DC outputs which provide voltages for the calorimeter electronics,
and has an internal fuse to protect against shorts or excessive loads.
Cleaning Tool
A scrupulously clean sample cell is essential in
order to obtain meaningful titration data. Because
the reaction vessel is non-removable, the lling
syringe may be used to repeatedly ush the cell
several times; or, when more rigorous cleaning is
called for, a cleaning adapter is provided which
allows the user to easily ush large volumes of
uid through the cell (Figure 4-8). The cell should
be cleaned immediately following an experiment,
then rinsed with buffer to condition it for the next
experiment. The cells should be lled with pure
deionized water between experiments to prevent
contamination from drying to the cell walls.
The cleaning tool is used as follows:
1. Remove the burette assembly and syringe
from the top opening of the N-ITC III, and
withdraw the cell contents using the lling
syringe.
2. Place the cleaning tool support disk in the
circular top of the calorimeter (Figure 4-9).
The support disk helps to guide the cleaning
Figure 4-8: The 5300 cleaning adapter
and support disk.
Figure 4-9: The support disk.