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SECTION 2—OPERATION
Part No 1148136 15 MA50 Series
Static/Alternating Pressure Button
1. Press the Alternating Pressure button ( ) to select between Static Mode and one
of four Alternating Pressure Times.
NOTE: The alternating pressure times indicate the frequency of deflation or inflation of half of the
air cushions (even or odd numbered). For example, 10 minutes is selected. In this example, the even
numbered air cushions in the mattress will deflate, while the odd numbered cushions remain at
constant pressure. When 10 minutes has elapsed, the even numbered air cushions will inflate while
the odd numbered cushions remain at constant pressure. When 10 minutes has elapsed again, the
odd numbered air cushions deflate while the even numbered cushions remain at constant pressure.
The air cushions continue to inflate or deflate like this as long as an alternating pressure time has
been selected. At all times, half of the air cushions remain at a constant pressure when an
alternating pressure time has been selected.
NOTE: In Static Mode, all air cushions in the mattress are maintained at constant pressure. The
Static LED is illuminated GREEN.
Adjusting the Minimum Pressure Setting (A/P Low)
The minimum pressure setting during Alternating Pressure is set to 0 (2 mmHg) at the
factory. This means that the mattress will deflate as much as possible during the deflation
time when using 10, 15 or 20 minute Alternating Pressure times. The setting can be
changed so the mattress will only deflate to 50% of the selected pressure setting.
1. Ensure the Standby LED is lit.
2. Perform one of the following:
• MA50 and MA51 - Press and hold the Max Inflate and Fowler buttons.
• MA55 - Press and hold the Mode and Fowler buttons.
3. Read the LCD Display. The LCD Display will flash:
• 0 if the current setting is 0 (2 mmHg).
• 5 if the current setting is 50% of the selected pressure.
4. Perform one of the following to toggle between the two settings:
• MA50 and MA51 - Press the Static/Alternating Pressure button.
• MA55 - Press the Static/Alternating Pressure button.
5. Press the Power button to save the setting.