3M Bair Hugger Model 775

Temperature Management Unit, Patient Warmer

Routine Maintenance

 * 1) Clean air filter: remove any dust with high pressured compressed air or vacuum. 3M recommends to replace the filter every 500 hours or every 12 months.
 * 2) Calibrate if necessary: set the unit to 43°C and wait for the temperature to become steady, compare to a trusted temperature meter.
 * 3) Test overtemp alarm: Hold "Bair Hugger logo" and "43°C" buttons. Two beeps indicate the test has completed. The alarm should stop the unit before it hits 56°C

How to Calibrate Operating Temperature
3M offers a testing "apparatus" for most accurate readings. It is comprised of a resistance based temperature probe held inside a plastic cylinder with a metal air diffusing filter to even out air flow to the temperature probe. You can purchase from 3M or other seller - CATALOG NUMBER: 22110


 * 1) Measure air temperature coming out of the hose with a trusted temperature meter
 * 2) Press and hold "Bair Hugger logo" and "Ambient" buttons until "OS" appears. This is your temperature offset.
 * 3) Wait for the unit to get to a steady temp, then use the 32°C and 38°C buttons to lower and raise the displayed temperature.
 * 4) Lastly, adjust the displayed temperature up or down until it matches what you see on your temperature meter

'''You can only adjust up to 3° or -3°. If your unit is still not reading close to your trusted reference meter, the hose will need to be replaced.'''