MAX-II

Metabolic System

FEATURES

· New Windows^® Software

· Communication to the computer via a USB (Universal Serial Bus) cable.

· Built-in Heartrate Interface for Polar sensor and also interfaces to compatible ECG equipment.

· 4 Channels for external analog instruments; communication with Treadmills and Ergometers, via RS-232.

· Front Panel Displays and Controls

· Pump, Solenoid Valves and Controller allow Manual or Automatic operation.

· Pulmonary Pneumotach precisely measures inspiratory volume.

· Manual Pushbuttons allow calibration check at any time.

· Dessicant Column - Allows a reference to room air +2 point

· calibration with known gases

· Non-rebreathing Valve, Tubing and other accessories included.

· Each analyzer is individually tested for accuracy, linearity and drift. To pass this test, the analyzer must be accurate within ±0.03% in the physiologic range.

· No disposable parts or supplies. The only serviceable parts to be purchased are the occasional replacement of Nafion® drying tubes and two small inexpensive filters which can be easily changed by the user once a year.

SYSTEM SPECIFICATIONS

OXYGEN ANALYZER:

Range 0 - 100% Oxygen, accuracy, linearity and repeatability are better than 0.03% of Oxygen from 10% - 21% Oxygen. Stability is better than 0.01% of Oxygen per hour. A 4-1/2 digit front panel display has a resolution of 0.01% Oxygen, front panel controls with vernier dials are provided for low and high calibration. Sample flow rate is 100 ml. one (1) minute. In order to protect the analyzer measuring cells, 5µ filters are employed.

CARBON DIOXIDE ANALYZER:

Range 0 - 10% CO₂, accuracy, linearity and repeatability are better than ±0.3% of CO₂ over the physiological range. Stability better than ±0.1% of CO₂ over 24 hours, 3-1/2 digit front panel display has a resolution of 0.01% of CO2, front panel controls with vernier dials are provided for low and high calibration.

VOLUME AND FLOW:

Range of flow from 0-15 liters per second, volume accuracy is better than ±1.0% from resting ventilation levels to Ve’s over 200 I/min. Flow stability better than ±0.01% full scale. Flow accuracy and pneumotach linearity errors are corrected using polynomial regression analysis of multiple strokes from a standard 3 liter syringe. Flow offset is displayed on the computer screen and using L.E.D.’s on the front panel of the MAX-II. Analog output 0 - 5 volts for 0 - 15 liters per second, response time 0.005 seconds. Verification of accuracy can be done without recalibration.

SOFTWARE:

Off-line data may be entered either during or after tests. All data can be exported to any Windows compatable spreadsheet or statistics program. Breath-by-breath or averaged data may be viewed during or after test in either tabular or graphic form. Averages may be viewed over any interval from 1 second to 99 seconds. Data from external equipment may be integrated with basic data.

“MAX-II” CART:

Size - 30”W x 24”D x 55”H - 4 Casters 2 of which are locking, a Power Distribution Strip, Bracket, Two Calibration Cylinders and Two Regulators.

Independent Validation:

Validation studies, performed by renowned physiologists, have shown the performance of the MAX-II to be comparable to simultaneous measurements made with Douglas Bags and a Tissot Spirometer (the gold standard).

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