Bair Hugger Security Systems Service Manual download pdf (Page 18)

Bair Hugger Model 750 Temperature Management Unit Service Manual

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Testing the Over-Temperature Detection System

warning

Do not perform the over-temperature detection system test while the temperature management unit is being

used for temperature management therapy. ermal injury may result.

caution

Connect each warming unit being tested to a separate power source.

Service frequency

Every 6 months or 500 hours of use, or whenever service is performed.

Tools/equipment

Model 22110 Temperature Test Unit

Method

: If continuing from previous section (Calibrating the Operating Temperature) skip to step 4.

: If the temperature management unit has been stored at a temperature lower than 20°C, allow it to

reach ambient temperature before beginning the test.

1. Connect the temperature management unit to a grounded power source. e unit performs a self-test

and automatically proceeds to Standby mode

2. Connect the temperature test kit to the hose of the temperature management unit.

3. Press the Ambient button and allow the temperature management unit to run for ve minutes.

4. Press the Alternative Mode button (See Figure 2) and the 43 °C button simultaneously for three

seconds. e temperature management unit is now in a Forced Over-temperature mode. In this mode,

the temperature management unit performs the following tasks:

• Blower activates.

• Heater elements continuously operate at full power.

• 43°C indicator light ashes.

• Over-temperature timer activates.

• “OT Test” ashes in the alphanumeric display.

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Bair Hugger Security Systems Service Manual Page 18