Section 3 - Theory Of Operation; Introduction; Basic Ctu Operation - Bard Arctic Sun 5000 Manual De Instrucciones

TEMPERATURE MANAGEMENT SYSTEM
Figure 2.4. A S Temperature Management System Model 5000
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Control Module with fluid delivery line removed
Figure 2.5. A
S Temperature Management System Model 5000
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Control Module with CTU attached
Figure 2.6. CTU switch 1
Figure 2.7. CTU switches 2 and 3
Figure 2.8. CTU calibration data

Section 3 - Theory of Operation

3.1 Introduction

The Calibration Test Unit (CTU) is an instrument that is used to calibrate
and verify operation of the A
rctic
System Model 5000 Control Module. It is a hand sized unit that
connects directly to the fluid delivery line port, taking the place of the
Model 5000 fluid delivery lines and pads. The CTU can be used to
semi-automatically test and calibrate the Control Module's two patient
temperature measurement inputs, the temperature out function, and
the internal water temperature measurement channels. It can also be
used to automatically verify the Control Module's flow rate and inlet
pressure measurements.

3.2 Basic CTU Operation

The CTU is used as an external stimulus and measuring device by
software embedded in the Control Module. By testing the subsystems of
the CTU in sequence, operation of the Control Module can be verified
and calibrated.
The CTU contains precision resistors that simulate several patient
temperatures. After a warm-up period, the simulated temperatures are first
applied to the system patient temperature inputs to temporarily calibrate
each channel. This calibration is temporary in the sense that it is used to
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C T U M A N U A L
S Temperature Management
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