CSZ Norm-o-Temp 111Z, Operation Manual

Page: 23 / 50

Operation Manual NORM-O-TEMP
®
, Model 111Z
Page 23 of 50
1-5.3. Temperature Safety Control System
The NORM-O-TEMP
®
unit is designed to carefully measure and control the temperature of the
circulating water by heating. The unit is engineered so that when the temperature of the
circulating water reaches the desired set point, the heater cycles on and off to maintain that set
point temperature. The unit is designed to stay within 0.6°C of the selected temperature.
The microprocessor board continuously monitors the temperature of the circulating water
and each unit is protected by an independent high limit safety. As an additional precaution, if
the water temperature sensor itself should fail, the unit shuts down, the alarm sounds, and the
display will read ERR (for error). With this safety design, the patient is protected from injury
and the unit from damage caused by extreme high temperatures.
Safety Controls for Protection from High Temperature
If the circulating water reaches 42.0°C
±
0.6°C (107.6°F
±
1.08°F), the microprocessor shuts off
heater.
If the circulating water reaches 43.5°C
±
0.6°C (110°F
±
1.08°F), the primary high temperature
safety will activate to turn off the pump, and turn off the heater. In addition, the HI TEMP LED
flashes and the audible alarm sounds.
If the circulating water reaches 44.5°C ± 0.6°C (112°F ± 1.08°F) the secondary high
temperature safety will activate to turn off the pump, and turn off the heater. In addition, the
HI TEMP LED illuminates and the audible alarm sounds.
If the circulating water reaches 46.0°C ± 0.6°C (115°F ± 1.08°F) the independent mechanical
high temperature safety will activate to shut off the power to the pump and shut off the power
to the heater. In addition, the HI TEMP LED and Power Fail LED illuminate, and the audible
alarm sounds.
CAUTION
•
The operator must regularly monitor the patient whenever hyperthermia or normothermia
therapy is used.