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Always operate the MAXBlend2 with clean, dry medical grade gases. Contaminants or moisture
can cause defective operation. Oxygen should have a minimum dewpoint of -80°F (-62°C) or
moisture content less than 7.9 PPM (0.0059mg/L). Oxygen “purity” should be at least 99.0%
and air used should be medical grade. Water vapor content must not exceed a dew point of
5°F (-15°C) below the lowest ambient temperature to which the delivery system is exposed.
Particulate content must not exceed that which would be found immediately downstream of
a 15 micron absolute filter. Refer to CGA commodity specifications G-4.3 and G7.1 for more
information. Water vapor content of medical air or O
2
supply to the blender must not exceed
5.63 x 10
3
milligrams H
2
O per cubic meter of non-condensible gas.
DO NOT disassemble the MAXBlend2. All service should be performed by a Maxtec Certified
Service Technician.
DO NOT use humidified oxygen to calibrate this system.
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Be sure the MAXBlend2 is securely mounted. This device is usually mounted to a hospital rail
system or an infusion stand. Dropping the device may cause injury or device damage.
» The oxygen sensors contain a weak acidic solution encapsulated in a plastic housing. Under
normal operating conditions the solution (electrolyte) is never exposed.
DO NOT use the oxygen sensor if it appears to be damaged or is leaking.
NOTES: Indicates supplemental information to assist in use of the device.
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The MAXBlend2 is tested for compliance with ISO 11195, and meets requirements regarding
reverse gas flow as delivered.
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Applicable parts used in the MAXBlend2 have been cleaned and degreased for oxygen service. Any
lubricants used are designed specifically for the application.
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As long as the absolute pressure of the gas mixture being monitored is constant, the MAXBlend2
will accurately read oxygen concentrations. However, if the absolute pressure varies the reading
will fluctuate proportionately as the sensor actually measures the partial pressure of oxygen
in the mixture. The sensor readings will also change proportionately with barometric pressure
changes. Because of this, daily calibration of the sensor is recommended.
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Users are advised to use pressure regulators which display the outlet pressure.
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All specifications assume the following standard environmental conditions, unless specified otherwise.
Ambient and sample gas temperatures of 77°F (25°C); barometric pressure of 30inHg (760mmHg);
sea level altitude; ambient relative humidity of 50%; sample gas relative humidity of 0%.
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It is important to note that the oxygen concentration selection scale is provided only as a
guideline for selecting O
2
concentrations. The clinician should use the MAXBlend2’s display
panel to adjust the O
2
concentration to the desired setting.
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The alarm limits can be set to levels that would render them useless for a particular patient's
clinical condition. Ensure that the delivered oxygen level and flow rate are set to values prescribed
by the patient's physician. Also ensure that the high and low alarm limits are set to levels such
that they will sound if the oxygen level is outside of safe limits. Be sure to review and, if necessary,
re-set the alarm limits when the patient's clinical condition changes or when the patient's
physician prescribes a change in oxygen therapy.
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This device does not contain automatic barometric pressure compensation.
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Gas leaks that cause room air to mix with the gas sample may cause inaccurate oxygen
readings. Ensure the O-rings on the sensor and flow diverter are in place and intact prior to use.
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