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MEASUREMENT OPERATION
5-260
TMPM5200-2
range and the required time to reach the set temperature differ depending on the
specimen.
Heater Output
This displays the output to the present heater as a percentage. The maximum current of
the direct-current power-supply of the temperature controller basic unit determines the
actual output voltage. For example, when you set the maximum current of the
direct-current power-supply to 1 A, about 0.5 A is output to the heater if the indicator is
positioned near the middle of its scale.
The temperature controller controls the temperature using the PID control; but generally
you can accomplish stable temperature control when the temperature reaches an
equilibrium state near the set temperature and the heater output becomes roughly 50%.
Since the setting temperature differs according to an observation object or purpose,
adjust the maximum current of the direct-current power-supply depending on the setting
temperature.
When you change the output voltage during temperature control, temperature
control worsens owing to the change of the output voltage. It takes a little time to
recover from such an unfavorable situation.
Setting
This shows setting conditions for the current temperature control. You can change the
setting from the Advanced Temperature Control dialog.
Control Stop
This stops the temperature control under the present state, and holds the heater output
under the present state. Use this button when the specimen temperature becomes stable
near the set temperature and the heater-output change becomes small. Click on this
button before you start SPM measurement for preventing the heater-output change from
affecting the measurement. The indication on the button during the control suspension
changes to Control Start.
Advanced
This displays the Advanced Temperature Control dialog for setting such as the holder
type and PID parameters.
