3M Bair Hugger 750, Service Manual

13

Bair Hugger Model 750 Temperature Management Unit Service Manual 

English 202522A

Check the 3M

TM 

Bair Hugger

TM

 therapy website to ensure you have the most recent version of this document. 

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Method

Note: If the temperature management unit has been stored at a temperature lower than 20°C, allow it to 
reach ambient temperature before beginning the calibration procedure� 

1�  Attach the Model 22110 temperature test device to the end of the temperature management unit hose�

2�  Connect the temperature management unit to a grounded power source� The unit performs a self-test 

and automatically proceeds to 

Standby

 mode� 

3�  Press the Ambient button to place the unit in 

Ambient

 mode�  Allow the unit to run in 

Ambient

 mode 

for at least ten minutes to equalize the temperature of the unit’s internal components�  

4�  Press the Alternative Mode button (see Figure 2) and the Ambient button simultaneously for 

3 seconds� The temperature management unit is now in 

Calibration

 mode� In this mode, the 

temperature management unit performs the following tasks:

•  37

 °C and 

38

 °C indicator lights flash�

•  Blower activates�
•  Heater elements deactivate�
•  The text “TMP” and the temperature in °C (0�1°C resolution) at the end of the hose appear in the 

alphanumeric display�

•  The text “OS” and the current calibration offset value (0�1°C resolution) appear in the 

alphanumeric display� 

5�  Compare the temperature shown on the alphanumeric display and the temperature on the 

independent, temperature calibration device� 

•  If the temperatures match, press the 

Alternative Mode

 button to return the temperature 

management unit to 

Standby

 mode� 

•  If the temperatures do not match, adjust the temperature management unit’s displayed 

temperature:
a�  Press the 

32°C

 button to decrease the temperature or the 

38°C

 button to increase the 

temperature by 0�1°C� You can adjust the temperature of the temperature management unit a 
maximum of ±3°C�

b�  Continue to press the 

32°C

or 

38°C

 button(s) until the temperature in the alphanumeric display 

matches the temperature on the calibration device� 

c�  Press the 

Alternative Mode

 button to store the calibration offset value and return the 

temperature management unit to 

Standby

 mode�

Note: If it is necessary to enter an offset value greater than ±3°C, there may be a defect in the hose end 

sensor� Remove unit from service until a new hose assembly can be substituted�