4400_0060
enFlow Service Manual Rev. F 04/12
Page 31 of 36
B. Overheat Mode – Alarm Test
When operated in the overheat mode, the heat is generated from the contact plate on the underside
of the enCheck unit. The enCheck heats the Warmer to > 45 °C. This temperature range simulates an
over-temperature situation demonstrating the functionality of the alarm (audible, LED’s, and display
(Controller only).
1.
Setup is the same as in the above steps 1-7 with the exception of step 4. Skip step 4. (In the
Overheat mode, it is only important to review the temperature of the Warmer, which is displayed on
the Controller/AC Power Pack front panel. This circumstance obviates the need for the thermometer
on this test.)
2.
Always run in the
normal mode
first before switching to the overheat mode.
3.
Next, switch to the overheat mode.
4.
Displayed temperatures of > 42 °C are shown in Yellow, indicating above normal conditions as well
the Temperature LED on the Warmer will move to Yellow. This is visual alarm indication to a potential
over temperature condition.
5.
After reaching temperatures of 45 °C, the Warmer LED will blink red, temperatures shown on the
Controller display will be in Red, and the audible alarm will sound.
6.
Move the MAINS power switch on the back of the Controller/AC Power Pack to the OFF position.
7.
Open the Warmer covers and carefully remove the enCheck. Use caution as the surface of the
contact plate on the underside of the enCheck may still be hot.
2. Alternate Methond – Simulated Use Performance Testing
Equipment
enFlow system
Power source
Infusion pump capable of maintaining up to 200 mL/min
IV line set
Water Bath
Source of distilled water or normal fluid - 0.5 L at 20 °C ± 2.0 °C
2 Extension sets - 22.9 cm (9 in.)
Thermometer - capable of measuring 10 °C to 60 °C accurate to ± 0.1 °C, plus 2 external “K” probes
Timer
Waste water container
Alternative equipment
Graduated cylinder, 100 to 500 mL.
Purpose
This test is performed to ascertain that the output fluid temperature of
the enFlow Warming System, while using a 22.9 cm (9 in.) extension set, is
40 °C ± 2.0 °C when the input fluid is 20 °C through the flow rates of 25-
100 mL/min. Additionally, it is run to determine that the rise in fluid
temperature is >16.5 °C when the input fluid is 20 °C utilizing flow rates of
100-200 mL/min.
