Maxtec MAXO2+ A User manual

OPERATING MANUAL &
INSTRUCTIONS FOR USE
R217M40 Rev. R
MaxO2+
BAT
CAL
®
MAXO2®+ A
MAXO2®+ AE

866.4.Maxtec www.maxtec.com I
EC REP
Maxtec TEL [phone]
2305 South 1070 West FAX [phone]
Salt Lake City, Utah 84119 email: [email protected]
USA website: www.maxtec.com
Authorized Representative:
QNET BV
Kantstraat 19
NL-5076 NP Haaren
The Netherlands
This manual describes the function, operation and maintenance of the Maxtec Model
MAXO2+ A and AE oxygen analyzer. The MAXO2+ family of Oxygen Analyzers utilizes
the Maxtec MAX-250 oxygen sensor and is engineered for fast response, maximum
reliability and stable preformance. The MAXO2+ is designed as a tool for use by qualifield
personnel to spot-check or messure oxygen concentration of delivered air/oxygen
mixtures. The MAXO2+ A and AE Analyzers are not intended for use in continuous
monitoring of oxygen delivery to a patient.
CLASSIFICATION
Protection against electric shock: ..........................Internally powered equipment.
Protection against water: ....................................................IPX1
Mode of Operation: ...................................................Continuous
Sterilization: ......................................................See section 7.0
Flammable anesthetic mixture: Not suitable for use in presence of a
flammable anesthetic mixture
Product Disposal Instructions:
The sensor, batteries, and circuit board are not suitable for regular trash disposal. Return
sensor to Maxtec for proper disposal or dispose according to local guidelines. Follow local
guidelines for disposal of other components.
WARRANTY
The MAXO2+ Analyzer is designed for medical oxygen delivery equipment and systems.
Under normal operating conditions, Maxtec warrants the MAXO2+ Analyzer to be
free from defects of workmanship or materials for a period of 2-years from the date
of shipment from Maxtec, provided that the unit is properly operated and maintained
in accordance with Maxtec’s operating instructions. Based on Maxtec product
evaluation, Maxtec’s sole obligation under the foregoing warranty is limited to making
replacements, repairs, or issuing credit for equipment found to be defective. This
warranty extends only to the buyer purchasing the equipment directly from Maxtec or
through Maxtec 's designated distributors and agents as new equipment.
Maxtec warrants MAXO2+ oxygen sensor in the MAXO2+ Analyzer to be free from
defects in material and workmanship for a period of 2-years from Maxtec’s date of
shipment in a MAXO2+ unit. Should a sensor fail prematurely, the replacement sensor
is warranted for the remainder of the original sensor warranty period.
Routine maintenance items, such as batteries, are excluded from warranty. Maxtec
and any other subsidiaries shall not be liable to the purchaser or other persons for
incidental or consequential damages or equipment that has been subject to abuse,
misuse, mis-application, alteration, negligence or accident.
These warranties are exclusive and in lieu of all other warranties, expressed or
implied, including warranty of merchantability and fitness for a particular purpose.

II 866.4.Maxtec www.maxtec.com
WARNINGS
!
Indicates a potentially hazardous situation, if not avoided, could result in death or serious injury.
»Never install the sensor in a location that will expose the sensor to patient’s
exhaled breath or secretions, unless you intend to dispose of the sensor, flow
diverter and tee adapter.
» Improper use of this device can cause inaccurate oxygen readings which can lead to
improper treatment, hypoxia or hyperoxia. Follow the procedures outlined in this user manual.
»Not for use in an MRI environment.
»Device specified for dry gas only.
»Never allow an excess length of tubing, lanyard or sensor cable near the patient’s head or
neck, which may result in strangulation.
»Before use, all individuals who will be using the MAXO2+ must become thoroughly
familiar with the information contained in this Operation Manual. Strict adherence to the
operating instructions is necessary for safe, effective product performance.
This product will perform only as designed if installed and operated in accordance with the
manufacturer’s operating instructions.
»Use only genuine Maxtec accessories and replacement parts. Failure to do so may seriously
impair the analyzer’s performance. Repair of this equipment must be performed by a qualified
service technician experienced in repair of portable hand held medical equipment.
»Calibrate the MAXO2+ weekly when in operation, or if environmental conditions change significantly.
(ie, Elevation, Temperature, Pressure, Humidity — refer to Section 3.0 of this manual).
»Use of the MAXO2+ near devices that generate electrical fields may cause erratic readings.
»If the MAXO2+ is ever exposed to liquids (from spills or immersion) or to any other physical
abuse, turn the instrument OFF and then ON. This will allow the unit to go through its self test to
assure everything is operating correctly.
»Never autoclave, immerse or expose the MAXO2+ (including sensor) to high temperatures
(>70°C). Never expose the device to pressure, irradiation vacuum, steam, or chemicals.
»This device does not contain automatic barometric pressure compensation.
»Although the sensor of this device has been tested with various anesthesia gases including nitrous
oxide, Halothane, Isoflurane, Enflurane, Sevoflurane and Desflurane and found to have acceptably
low interference, the device in entirety (including electronics) is not suitable for use in the presence
of a flammable anesthetic mixture with air or with oxygen or nitrous oxide. Only the threaded
sensor face, flow diverter, and “T” adapter may be allowed to contact such a gas mixture.
»NOT for use with inhalation agents. Operating the device in flammable or explosive atmospheres
may result in fire or explosion.
CAUTION: Indicates a potentially hazardous situation, if not avoided, could result in minor or
moderate injury and property damage.
»Federal Law (USA) restricts this device to sale by or on the order of a physician.
»Replace the batteries with recongnized high quality AA Alkaline or Lithium batteries.
DO NOT use rechargeable batteries.
»If the unit is going to be stored (not in use for 1 month), we recommend that you remove the
batteries to protect the unit from potential battery leakage.
»The Maxtec MAX-250 oxygen sensor is a sealed device containing a mild acid electrolyte, lead
(Pb), and lead acetate. Lead and lead acetate are hazardous waste constituents and should be
disposed of properly, or returned to Maxtec for proper disposal or recovery.
DO NOT use ethylene oxide sterilization.
DO NOT immerse the sensor in any cleaning solution, autoclave or expose the sensor to high
temperatures.
» Dropping sensor can adversely affect its performance.
»The device will assume a percent oxygen concentration when calibrating. Be sure to apply
100% oxygen, or ambient air concentration to the device during calibration or the device will not
calibrate correctly.
NOTE: This product is latex free.

866.4.Maxtec www.maxtec.com III
TABLE OF CONTENTS
Classification .................................................. I
Warranty ..................................................... I
Warnings .....................................................II
1.0 SYSTEM OVERVIEW ..........................................1
1.1 Base Unit Description ............................................1
1.2 Symbol Guide ..................................................1
1.3 Component Identification .........................................2
1.4 Component Description...........................................2
1.5 MAX-250+ Oxygen Sensor ........................................3
2.0 OPERATING INSTRUCTIONS ...................................3
2.1 Getting Started .................................................3
2.1.1 Protect Tape .................................................3
2.1.2 Automatic Calibration...........................................3
2.2 Calibrating the MAXO2+ Oxygen Analyzer .............................4
2.2.1 In-line Calibration (Flow Diverter - Tee Adaptor) .......................4
2.2.2 Direct Flow Calibration (Barb) ....................................5
3.0 FACTORS INFLUENCING ACCURATE READINGS .....................5
3.1 Elevation Changes...............................................5
3.2 Temperature Effects .............................................5
3.3 Pressure Effects ................................................6
3.4 Humidity Effects ................................................6
4.0 CALIBRATION ERRORS AND ERROR CODES ........................6
5.0 CHANGING THE BATTERIES....................................7
6.0 CHANGING THE OXYGEN SENSOR ...............................8
6.1 MAXO2+A Model ...............................................8
6.2 MAXO2+AE Model ..............................................9
7.0 CLEANING AND MAINTENANCE .................................9
8.0 SPECIFICATIONS ...........................................10
8.1 Base Unit Specifications .........................................10
8.2 Sensor Specifications ...........................................10
9.0 MAXO2+ SPARE PARTS AND ACCESSORIES .......................10
9.1 Included with your Unit..........................................10
9.2 Standard Replacement Parts......................................11
9.3 Optional Accessories............................................11
9.3.1 Optional Adaptors ............................................11
9.3.2 Mounting Options ............................................11
9.3.3 Carrying Options .............................................11

866.4.Maxtec www.maxtec.com 1
1.0 SYSTEM OVERVIEW
1.1 Base Unit Description
The MAXO2+ analyzer provides unparalleled performance and reliability due to
an advanced design that includes the following features and operational benefits.
»Extra-life oxygen sensor of approximately 1,500,000 O2 percent hours (2-year warranty).
»Durable, compact design that permits comfortable, hand-held operation and easy to clean.
»Operation using only two AA Alkaline batteries (2 x 1.5 Volts) for
approximately 5000 hours of performance with continuous use. For extra extended
long life, two AA Lithium batteries may be used.
»Oxygen-specific, galvanic sensor that achieves 90% of final value in
approximately 15 seconds at room temperature.
»Large, easy-to-read, 3 1/2-digit LCD display for readings in the 0-100% range.
»Simple operation and easy one-key calibration.
» Self-diagnostic check of analog and microprocessor circuitry.
» Low battery indication.
» Calibration reminder timer that alerts the operator, using a calibration icon
on the LCD display, to perform a unit calibration.
1.2 Symbol Guide
The following symbols and safety labels are found on the MAXO2+:
CAL
BAT
Warning
On/off Button
Calibration Button
Low Battery
Percent
Meets ETL standards
Do not throw away. Follow local
guidelines for disposal.
Calibration required
%
EC REP Authorized Representative
in the European Community
LOT
IPx1
SN
Lot code/Batch code
Drip Proof
Serial Number
REF Catalog Number
Manufacturer
Follow instructions for use.
Do Not
Federal Law (USA) restricts this device
to sale by or on the order of a physician
only
!

2866.4.Maxtec www.maxtec.com
1.3 Component Identification
1.4 Component Description
3 1/2-Digit Display - The 3 1/2 digit liquid crystal display (LCD) provides
direct readout of oxygen concentrations in the range of 0 – 105.0%
(100.1% to 105.0% used for calibration determination purposes).
The digits also display error codes and calibration codes as necessary.
Low Battery Indicator - The low battery indicator is located at the top
of the display and is only activated when the voltage on the batteries is
below a normal operating level.
“%” symbol - The “%” sign is located to the right of the concentration
number and is present during normal operation.
Calibration symbol - The calibration symbol is located at the bottom
of the display and is timed to activate when a calibration is necessary.
ON/OFF Key - This key is used to turn the device on or off.
Calibration Key - This key is used to calibrate the device. Holding the key
for more than three seconds will force the device to enter a calibration mode.
Sample Inlet Connection -This is the port at which the device is
connected to determine oxygen concentration.
CAL
FIGURE 1
Keypad
LCD Display
LCD Display
Keypad
Sample Inlet Connection

866.4.Maxtec www.maxtec.com 3
1.5 MAX-250 Oxygen Sensor
The MAX-250+ oxygen sensor offers stability and extra life. The MAX-250+ is
a galvanic, partial pressure sensor that is specific to oxygen. It consists of two
electrodes (a cathode and an anode), a teflon membrane and an electrolyte.
Oxygen diffuses through the teflon membrane and immediately reacts at a gold
cathode. Concurrently, oxidation occurs electrochemically at the lead anode,
generating an electrical current and providing a voltage output. Electrodes are
immersed in a unique gelled weak acid electrolyte which is responsible for
the sensors long life and motion insensitive characteristis. Since the sensor
is specific to oxygen, the current generated is proportional to the amount of
oxygen present in the sample gas. When no oxygen is present, there is no
electrochemical reaction and therefore, negligible current is produced. In this
sense, the sensor is self-zeroing.
2.0 OPERATING INSTRUCTIONS
2.1 Getting Started
2.1.1 Protect Tape
Prior to turning on the unit, a protective film covering the threaded sensor face
must be removed. After removing the film, wait approximately 20 minutes for
the sensor to reach equilibrium.
2.1.2 Automatic Calibration
After the unit is turned on it will automatically calibrate to room air. The display
should be stable and reading 20.9%.
CAUTION: The device will assume a percent oxygen concentration when calibrating.
Be sure to supply 100% oxygen, or ambient air concentration to the device during
calibration or the device will not calibrate correctly.
To check the oxygen concentration of a sample gas:
(after the unit has been calibrated)
1. Connect the Tygon tubing to the bottom of the
analyzer by threading the barbed adapter onto
the oxygen sensor. (FIGURE 2, B)
2. Attach the other end of the sample hose to the
sample gas source and initiate flow of the
sample to the unit at a rate of 1-10 liters per
minute (2 liters per minute is recommended).
3. Using the “ON/OFF” key, make sure the unit
is in the power “ON” mode.
4. Allow the oxygen reading to stabilize. This will
normally take about 30 seconds or more.
A B
FIGURE 2

4866.4.Maxtec www.maxtec.com
2.2 Calibrating the MAXO2+ Oxygen Analyzer
NOTE: We recommend use of medical grade USP or >99% purity oxygen when
calibrating the MAXO2+.
The MAXO2+ Analyzer should be calibrated upon initial power-up. Thereafter,
Maxtec recommends calibration on a weekly basis. To serve as a reminder, a
one week timer is started with each new calibration. At the end of one week
a reminder icon “
CAL
” will appear on the bottom of the LCD. Calibration is
recommended if the user is unsure when the last calibration procedure was
performed, or if the measurement value is in question. Start calibration by
pressing the key for more than 3 seconds. The MAXO2+ will automatically
detect if you are calibrating with 100% oxygen or 20.9% oxygen (Normal air).
DO NOT attempt to calibrate to any other concentration.
For hospital and home care a new calibration is required when:
» The measured O2percentage in 100% O2is below 97.0% O2.
» The measured O2percentage in 100% O2is above 103.0% O2.
» The CAL reminder Icon is blinking at the bottom of the LCD.
» If you are unsure about the displayed O2percentage. (See Factors influencing
accurate readings.)
For ID testing, (or optimum accuracy) a new calibration is required when:
» The measured O2percentage in 100% O2is below 99.0% O2.
» The measured O2percentage in 100% O2is above 101.0% O2.
» The CAL reminder Icon is blinking at the bottom of the LCD.
» If you are unsure about the displayed O2percentage. (See Factors influencing
accurate readings.)
A simple calibration may be made with the sensor open to static ambient air.
For optimum accuracy Maxtec recommends that the Sensor be placed in a
closed loop circuit where gas flow is moving across the sensor in a controlled
manner. Calibrate with the same type of circuit and flow that you will use in
taking your readings.
2.2.1 In Line Calibration (Flow Diverter – Tee Adapter)
1. Attach the diverter to the MAXO2+ by threading it on to the bottom of the sensor.
2. Insert the MAXO2+ in the center position of the tee adapter (FIGURE 2, A).
3. Attach an open-ended reservoir to the end of the tee adapter. Then start the
calibration flow of oxygen at two liters per minute.
» Six to 10 inches of corrugated tubing works well as a reservoir. A calibration oxygen
flow to the MAXO2+ of two liters per minute is recommended to minimize the possibility
of obtaining a “false” calibration value.
4. Allow the oxygen to saturate the sensor. Although a stable value is usually
observed within 30 seconds, allow at least two minutes to ensure that the
sensor is completely saturated with the calibration gas.
5. If the MAXO2+ is not already turned on, do so now by pressing the analyzer
“ON” button.