Controls and Displays
5-11
If the Controller is in the Temperature Control mode, a test of the temperature sensor
functionality is made prior to delivery of RF power. If a faulty temperature sensor is
detected by the Controller, which can be caused by the temperature sensor indicating a
temperature outside the operating range of 31
o
C to 43
o
C, or a short or open in the
temperature measurement circuit, the Controller does not enter the RF Power ON mode.
It enters an Error mode, indicating a faulty temperature measuring circuit has been
detected or the temperature is outside the operating range. To exit the Error mode,
depress the RF POWER CONTROL Button, which returns the Controller to the READY
mode.
Figure 5-8: RF POWER CONTROL Panel and Button/Light
RF POWER
CONTROL
RF Power
Control
Panel
RF Power
Control
Button/Light
CALIBRATION Panel
CALIBRATION Button
Pressing the CALIBRATION Button (see Figure 5-9) places the Controller into the
CALIBRATION mode which performs the following functions:
•
Approximately 1 Joule of energy is delivered to the tissue which is used to make a
single measurement of tissue impedance. This value is continuously displayed on the
front panel.
•
The catheter tip temperature is continuously monitored and displayed on the front
panel. This allows assessment of the temperature measuring function of the
Catheter(T°). If this value differs significantly from the normal body temperature of
37
o
C, the Catheter(T°) should be removed and replaced with another Catheter(T°).
•
A zero to one volt square-wave signal representing a minimum-to-full-scale signal is
transmitted from each of the rear panel analog outputs (for calibration of an optional
recorder). This square-wave calibration signal is transmitted continuously to the rear
panel analog output ports.
