
MAINTENANCE
BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
Page 82 of 131
4-8.
LOW LIMIT SAFETIES CHECK
A.
Plug the BLANKETROL III into the appropriate power supply and turn its power
switch to the “O” position to turn unit off.
B.
Remove the top of the unit, as described in Section (5-2.2.), and locate the test
jumpers in the storage position marked JP5 on the processor board, which is on the
left edge of the board.
C.
Place one of these jumpers on the test port (JP4 position) in the location marked LC.
D.
Turn the unit on and monitor the temperature on the water temperature display as
the water is cooled.
E.
The unit should cool the water to 2.0°C ± 2.0°C and shut off; status should indicate
LOW LIMIT REMOVE FROM SERVICE.
F.
Turn the unit off and remove the test jumper.
G.
Allow the water temperature to rise above 4.0°C.
H.
Place a jumper on the test port in the location marked LS.
I.
Turn the unit on and monitor the temperature on the water temperature display as
the water is cooled.
J.
The unit should cool the water to 2.0°C ± 2.0°C and shut off; status should indicate
LOW LIMIT REMOVE FROM SERVICE.
K.
Turn the unit off and remove the test jumper.
L.
Allow the water temperature to rise above 4.0°C.
WARNING
The repair, calibration, and servicing of the BLANKETROL III should be performed
by qualified Medical Equipment Service Technicians, Certified Biomedical
Electronics Technicians, or Certified Clinical Engineers familiar with good repair
practices for servicing medical devices, and in accordance with instructions
contained in this manual.
Improper repair can result in damage to the
BLANKETROL III system and patient injury.
Always
unplug the unit
before accessing internal components during service.
Failure to unplug the unit could result in electric shock.