TA Instruments RSA-G2, Руководство пользователя

Страница: 54 / 127

RSA-G2 Getting Started Guide Page 24
Oven Temperature Control
Oven temperature is maintained by a control loop that is closed around three platinum resistance thermom -
eter (PRT) sensors located in the oven. The FCO may use up to three PRT sensors in order to control the
temperature. These are:
• Mid-oven air PRT (used with solid-sample geometries)
• Upper air PRT (used for fast-response temperature control)
• Lower air PRT (used for fast-response temperature control)
Using the default system settings, the RSA-G2 reports and controls the measured temperatures using the
mid-oven air PRT temperature.
Measured oven temperatures from all PRTs are compared to the set point temperature in the FCO control
-
ler, and heater power is changed to minimize the difference between the set point and measured tempera -
tures. The oven uses faster responding air temperature measurements to stabilize rapid temperature
changes in the oven, and uses the geometry or mid-oven air temperature measurements to precisely adjust
the final oven temperature.