7.5.2 ALTERNATE Test Jumper
Procedure (steps 21 to 50)
21. Unplug the Power Unit.
Always unplug the Power Unit
before attaching or removing
jumpers and when resetting
thermostats. Failure to unplug the
Power Unit could result in
electrical shock and cause death
or serious injury.
22. There are two patient limit thermostats
within the Power Unit and each must be
tested. One 16 gauge insulated stranded
wire jumper with alligator clips will be
required. To help remember to remove the
test jumper, label a LARGE, distinctive tag
“REMOVE AFTER TEST” and tie the tag to
the jumper.
Remove the six screws on the back of the
unit. Install a jumper across thermostat S3
(item 17, fig. 11, p.26). Temporarily secure
the two halves of the enclosure together with
adhesive (duct) tape.
23. Locate the air temperature sensor at the
center of the end of the hose (fig. 6A, p. 10).
Secure the sensor with adhesive tape.
Verify
that the sensor is located at the center of
the hose.
24. Connect the hose to a Model TC1050,
TC2050, TC2052, or TC2054 Quilt (fig. 6B,
p. 10).
25. Plug in the Power Unit and turn it on. Select
the
46°C
setting. Run the Power Unit for
5 to 10 minutes. The temperature will
oscillate. During this time interval, familiarize
yourself with the following steps 26 through
31, so that the procedure can be
accomplished quickly, without letting the
Power Unit cool.
NOTE: Perform the following steps 26
through 31 as quickly as possible, to
prevent the Power Unit from cooling
down:
26. Unplug the Power Unit.
Carefully separate the
enclosure slightly.
27. Unplug the thermistor (item 12, fig. 10, p. 25)
from the back of the control board.
NOTE: The power resistor on the back side
of the PC board may be hot to touch.
28. Put the enclosure back together and secure
it with adhesive (duct) tape.
29. Plug in the Power Unit and turn it on. Leave
unit in
32°C
temperature setting. Have a
stopwatch ready.
NOTE: Do not set the TEMPERATURE
SETTINGS switch to fan only since this
setting disables the heater.
30. The temperature should increase. When the
air temperature reaches 48°C, start the
stopwatch. The Power Unit will heat until the
S2 thermostat trips. When this happens, the
blower and heater will shut off. Stop the
stopwatch and note the highest temperature
displayed. This is the upper limit temperature
for one of the thermostats. Record the time
and temperature on the
INSPECTION FORM
(table 2, pp. 16-17).
31. Verify that the
REMOVE FROM USE
light is
lit.
32. Unplug the Power Unit.
33. Open the enclosure and allow the Power Unit
to cool for 5-10 minutes.
34. Locate the two patient limit thermostats
(item 17, fig. 11, p. 26). Gently press the
reset button in the center of each
thermostat. Move the a jumper across
thermostat S2.
Use care when resetting the
thermostats.
Excessive force
(force greater than 5 pounds) can
damage the overtemp protection
device and/or inadvertently alter
the trip temperature of the device.
Section 7 - Functional Check and Safety Inspection (cont’d)
12
WARNING
WARNING
