VP-ITC MicroCalorimeter User’s Manual
Temp(Celsius)
This text box displays the current temperature, in degrees Celsius, of the adiabatic jacket.
DP (uCal/sec)
This text box displays the
D
ifferential
P
ower, in
µ
Cal/sec., between the reference cell and the
sample cell. Positive DP values means that the reference cell is hotter than the sample cell, while
negative DP values means that the sample cell is hotter than the reference cell. In terms of
reactions (assuming they take place in the sample cell) exothermic reactions will cause the DP to
deflect in the negative direction while endothermic reactions will cause the DP to deflect in the
positive direction. The power units for the DP data channel may be displayed in mCal/min.,
µ
Cal/sec. or
µ
Watts. Experimental data will always be saved in units of
µ
Cal/sec.
Whenever the VP-ITC is equilibrated the DP value should be positive and stable. The power
level of the equilibrated DP signal should be close (+/- 1 uCal/sec.) to the ‘Reference Power’
setting, as set prior to starting the run.
DT (deg. C)
This text box displays the
D
ifferential
T
emperature, in degrees Celsius, between the adiabatic
jacket and the calorimeter cells (i.e. the average temperature of both cells).
Whenever the VP-ITC i9s equilibrated the DT signal should be close to zero degrees Celsius
(+/- 0.05) and stable.
Menus and Buttons
The VPViewer Main Window contains drop down menus, buttons and Window Tabs. The
Main
Drop Down Menu
selections generally control global system functions The
Main Window
Buttons
allow easy access to features that are frequently used. The
Main Window Tab Selections
provide detailed windows for specific functions. The details of these controls can be found in the
following sections.
VPViewer Main Drop Down Menus
The
Main Drop Down Menus
at the top of VPViewer will provide access to some of the less
frequently used functions of the application.
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