14
Mute Button
Press the Mute button to silence the audible alarm tone for two minutes (120 seconds). If the alarm condition
has not been cleared during this two-minute period, the audible alarm will sound again.
Press for Menu/Enter Knob
The “Press for Menu/Enter” knob is a dual-function control knob and pushbutton.
Press the knob to display a menu screen or to indicate the completion of a selection.
Turn the knob to scroll between selections or to scroll temperature trend graphs.
Serial Interface Connector
A female 9-pin subminiature D connector is mounted on the lower left corner of the rear of the display head.
Use this connector to attach a serial interface cable between the console and a laptop computer. Once con-
nected, the computer can download patient temperature trend data stored by the console.
Figure 2.3. Serial Interface Connector
Recirculating Chiller
The chiller consists of an air-cooled refrigeration system, reservoir heater, circulation pump, stainless steel res-
ervoir, reservoir cover, and a temperature controller.
Temperature Controller
The temperature controller uses input from the patient’s temperature probe and the operator-selected patient
temperature setpoint to regulate the coolant temperature of the recirculating chiller. The temperature control-
ler constantly adjusts the coolant temperature by means of a closed-loop control system. The operator enters a
setpoint that represents the patient’s target temperature. The controller cools or heats the coolant, in a range
between 0º and 42º C (32º and 107.6º F) to optimally achieve and maintain the target temperature. The con-
troller constantly displays the measured patient temperature and the target temperature.
An optional mode can command the controller to approach the target temperature at a user-selected rate.
Summary of Contents for IVTM
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