3M Bair paws 875 Service Manual - page 21
17
English 202036A
Check the 3M
TM
Bair Paws
TM
system website to ensure you have the most recent version of this document.
www.bairpaws.com reorder #202036A
Method
Note: The OT threshold temperature cannot be adjusted If problems occur, contact 3M
Patient Warming customer service
1 If continuing from Calibrating the Operating Temperatures, skip to step 6; otherwise,
proceed to the next step
2 Turn the warming unit on and select the maximum airflow and temperature setting by
turning the controller knob completely clockwise (refer to position C in Figure 6)
3 Press the clip buttons on the hose end and insert the hose end into the temperature test
kit
4 Allow the system to warm 10 minutes before starting the test
5 Extend the hose straight to its full length If not already done, remove the two screws
that attach the case bottom (dark purple) to the warming unit and slide it down the
hose
6 With a small screwdriver continuously press the OT
test button (see Figure 11) for the duration of the over-
temperature test * When functioning properly, the
“Over-Temp” indicator will illuminate and an audible
alarm will sound The peak test kit temperature will be
below 56°C, and the heater will switch off within two
minutes If this does not occur, return the unit to 3M
Patient Warming for service
*Pressing the OT test button places the heater in a full-on, unregulated condition;
therefore, the unit may become slightly warm to the touch
7 Turn the temperature controller to the off position to
reset the alarm (position A, Figure 7) Wait ten seconds
8 Turn the temperature controller to position B (Figure 7) After waiting several minutes,
the thermocouple temperature should approach the ambient temperature
9 Reposition the case bottom with the filter and attach to the warming unit with two
screws
Figure 11
OT test button hole