Maxtec MAXO2+A, MAXO2+AE Instructions Manual

MAXO

BAT

CAL

®

+

MAXO

A

2

MAXO

®

+

A / AE INDUSTRIAL GUIDE & OPERATING INSTRUCTIONS

2

®

+

AE

2

R217M42 Rev.K

Maxtec TEL [phone]
6526 South Cottonwood Street FAX [phone]
Salt Lake City, Utah 84107 email: [e-mail]
USA website: www.maxtec.com

Classification

Protection against electric shock: Internally powered equipment.
Protection against water: IPX1
Mode of Operation: Continuous

Do not throw away. Dispose of properly in accordance with local
regulations.

WARRANTY

The MAXO2+ Analyzer is designed for medical oxygen delivery equipment and systems.
Under normal operating conditions, Maxtec warrants the MAXO
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
new equipment.

Maxtec warrants MAXO
in material and workmanship for a period of 2-years from Maxtec’s date of shipment in a

MAXO

+ unit. Should a sensor fail prematurely, the replacement sensor is warranted for the

2

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, mis­application, alteration, negligence or accident.

These warranties are exclusive and in lieu of all other warranties, expressed or implied,

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+ oxygen sensor in the MAXO2+ Analyzer to be free from defects

2

‘s designated distributors and agents as

+ Analyzer to be free from

2

ii

PREFACE

This manual describes the function, operation and maintenance of the

MAXO
line of oxygen analyzers and monitors, the MAXO

+

hand-held oxygen analyzer. A member of Maxtec’s MAXO2 analyzer

2

+

utilizes the MAX-250+

2

oxygen sensor and is engineered for long life, maximum reliability and stable
perfmance.

NOTE: In order to obtain optimum performance from your MAXO2+
analyzer, all operation and maintenance must be performed in accor­dance with this manual. Please read the manual thoroughly before
using the analyzer and do not attempt any repair or procedure that is
not described herein. Maxtec cannot warrant any damage resulting from
misuse, unauthorized repair or improper maintenance of the instrument.

Thank You

Thank you for your purchase of a Maxtec MAXO
appreciate the time and energy you invest in selecting the equipment best
suited to your needs. As exchange, we are supplying you with a reliable,
high-quality instrument that, with proper care and operation, will provide you
with years of exceptional service. We also encourage your comments or sug­gestions as to how our equipment, in any way, can better serve your needs.
Please feel free to write, FAX or e-mail us at the address on page ii of this
manual c/o the Maxtec Marketing Department. Please visit our website www.
maxtec.com for more information on our products and services.

+

oxygen analyzer. We

2

WARNING:

Never allow an excess length of tubing, lanyard, or sensor cable near a per­son’s head or neck, which may result in strangulation.

Before use, all individuals who will be using the MAXO
oughly 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
so may seriously impair the analyzer’s performance. Repair or alteration of
the MAXO

+

beyond the scope of the maintenance instructions, or by anyone

2

other than an authorized Maxtec
fail to perform as designed.

Calibrate the MAXO
tions change significantly. (ie. Elevation, Temperature, Pressure, Humidity —
refer to Section 4.0 of this manual).

iii

+

must become thor-

2

®

accessories and replacement parts. Failure to do

®

service person, could cause the product to

+

weekly when in operation, or if environmental condi-

2

WWW.MAXTEC.COM

Use of the MAXO
erratic readings.

+

near devices that generate electrical fields may cause

2

If the MAXO

+

is ever exposed to liquids (from spills or immersion) or to any

2

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.
You may need to allow the sensor time to dry out.

Never immerse or expose the MAXO

+

(including sensor) to high tempera-

2

tures (>70°C). Never expose the device to pressure, irradiation vacuum,
steam, or chemicals.

NOTE: Replace the batteries with recognized high quality AA Alkaline or
Lithium batteries.

NOTE: 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.

FAILURE TO COMPLY WITH THESE WARNINGS AND CAUTIONS COULD
RESULT IN INSTRUMENT DAMAGE AND POSSIBLY JEOPARDIZE THE
WELL BEING OF THE USER.

MANUFACTURED BY MAXTEC

iv

Safety Labeling

The following symbols and safety labels are found on the MAXO

Follow instructions for use.

On/off Button

+

:

2

Warning

Meets ETL standards
Do not throw away. Follow local

guidelines for disposal.
Calibration required

LOT

Lot code/Batch code
Serial Number

SN

Calibration Button



Low Battery

Percent

%

Manufacturer

Catalog Number

REF

Do Not

v

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TABLE OF CONTENTS

Classification .....................................................................ii

Warranty ........................................................................ii

Warnings .......................................................................iii

Safety Symbols ...................................................................v

1.0 SYSTEM OVERVIEW ..........................................................1

1.1 Base Unit Description ......................................................1

1.2 Component Identification ....................................................2

1.3 Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.4 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 MAXO

2.3 Operation with OxyKnob Adapter..............................................5

2.4 Operation with BC Adapter ..................................................6

3.0 GAS SAMPLE OPTIONS .......................................................7

4.0 FACTORS INFLUENCING ACCURATE READINGS ..................................8

4.1 Elevation Changes.........................................................8

4.2 Temperature Effects........................................................8

4.3 Pressure Effects...........................................................8

4.4 Humidity Effects...........................................................8

5.0 CALIBRATION ERRORS AND ERROR CODES.....................................9

6.0 CHANGING THE BATTERIES ..................................................10

7.0 CHANGING THE OXYGEN SENSOR.............................................11

7.1 MAXO

7.2 MAXO

+

A Model .........................................................11

2

+

AE Model ........................................................12

2

8.0 CLEANING AND MAINTENANCE ...............................................12

9.0 SPECIFICATIONS ............................................................13

9.1 Base Unit Specifications ...................................................13

9.2 Sensor Specifications......................................................14

10.0 MAXO

+

SPARE PARTS AND ACCESSORIES.....................................14

2

10.1 Included With Your Unit....................................................14

10.2 Standard Replacement Parts ................................................14

10.3 Optional Accessories ......................................................14

10.3.1 Optional Adapters ...................................................14

10.3.2 Mounting Options ...................................................15

10.3.3 Carrying Options ....................................................15

+

Oxygen Analyzer.......................................4

2

MANUFACTURED BY MAXTEC

vi

1.0 SYSTEM OVERVIEW

1.1 Base Unit Description

The MAXO

+

analyzer provides unparalleled performance and reliability

2

due to an advanced design that includes the following features and oper­ational benefits.

• Extra-life oxygen sensor of approximately 1,500,000 O

2 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.

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1.2 Component Identification

FIGURE 1

1.3 Component Description

1. 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% - 105.0% used for calibration determination
purposes). The digits also display error codes and calibration codes
as necessary.

2. 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.

3. “%” symbol - The “%” sign is located to the right of the concentration
number and is present during normal operation.

4. Calibration symbol - The calibration symbol is located at the
bottom of the display and is timed to activate when a calibration is
necessary.

5. ON/OFF Key - This key is used to turn the device on or off.

6. Calibration Key - This key is used to calibrate the device.
Holdi n g t h e key for more than three seconds will force the device to
enter a calibration mode.

CAUTION: 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.

Sample Inlet Connection

This is the port at which the device is connected to determine oxygen concen­tration.

MANUFACTURED BY MAXTEC

2

1.4 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 characteristic. 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.

CAUTION: 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.

CAUTION: Do not immerse the sensor in any cleaning solution,

autoclave or expose the sensor to high temperatures.

CAUTION: Dropping sensor can adversely affect its performance.
Do not throw away. Dispose of properly in accordance with local

regulations.

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%. To check the oxygen concen­tration of a sample gas: (after the unit has been calibrated).

3

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1. Connect the Tygon tubing to the bottom of the
analyzer by threading the barbed adapter onto
the oxygen sensor. (figure 2)

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.

®

2.2 Calibrating the MAXO

+

Oxygen Analyzer

2

FIGURE 2

The MAXO

+

Analyzer should be calibrated upon initial power-up. Thereafter,

2

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 “ ” 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 button for more than 3 seconds. The

+

MAXO

will automatically detect if you are calibrating with 100% or 20.9%

2

oxygen (normal air). Do not attempt to calibrate to any other concentration.

100% O

• The measured O

• The measured O2 percentage in 100% O2 is above 101.0% O

verification, new calibration is required when:

2

percentage in 100% O2 is below 99.0% O

2

2.

2.

• The CAL reminder Icon is blinking at the bottom of the LCD.

• If you are unsure about the displayed O2 percentage. (see Factors

influencing accurate readings.)

Compressed air (20.9% O

• The measured O

• The measured O2 percentage in 20.9% O2 is above 21.9% O

), new calibration is required when:

2

percentage in 20.9% O2 is below 19.9% O

2

2.

2.

• The CAL reminder Icon is blinking at the bottom of the LCD.

• If you are unsure about the displayed O

percentage.

2

(see Factors influencing accurate readings.)

Calibrate with the same type of circuit and flow that you will use when taking
your readings.

MANUFACTURED BY MAXTEC.

4

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.

2.3 Operation with Oxyknob Adapter (refer to figure below)

1. Attach the Oxyknob adaptor to the threaded sensor of your Maxtec

Analyzer.

2. Hand tighten until sensor o-ring seals against the Oxyknob.

3. Slowly crack open the tank. Listen for a slight hissing sound.

4. Hold the Oxyknob up to the outlet of the tank.

5. Align the small hole in the bottom or side of the Oxyknob to the hole in the

outlet of the tank.

6. Hold the analyzer in place untile the reading has stabilized on the analyzer
display. (about 15 seconds or less)

7. Remove Oxyknob after reading and close valve on the tank.

WARNING:

High gas pressures may cause damage to oxygen sensor and result in incor­rect readings. Turn down the tank valve as much as possible to avoid sensor
damage.

Do not cover the larger holes on the Oxyknob.
Cold gas exiting a pressurized tank can cause the sensor reading to drift

if exposed for an extended period of time. Allow sensor to warm between
readings if necessary.

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2.4 Operation with Optional BC Adapter (refer to figure
below)

1. Attach the included Barbed Adapter to the MAXO

+

by threading it on to

2

the bottom of the sensor.

2. Connect the included tubing to the barbed adapter.

3. Attach the BC adapter (sold separately) to the other end of the tube.

4. Connect the inflator hose on the regulator to the BC adapter and tube.

5. If the MAXO

+

is not already turned on, do so now by pressing the

2

analyzer “ON” button.

6. Initiate flow of nitrox to the unit to allow the gas to saturate the sensor. The

BC adapter will regulate the optimum flow and pressure. 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 gas.

7. The analyzer will now look for a stable sensor signal and a
good reading. When obtained, the analyzer will display
the oxygen percentage on the LCD.

MANUFACTURED BY MAXTEC

Inflator Hose

FIGURE 3

Nitrox Tank

6

3.0 GAS SAMPLE OPTIONS

7

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4.0 FACTORS INFLUENCING ACCURATE READINGS

4.1 Elevation Changes

• Changes in elevation result in a reading error of approximately 1% of
reading per 250 feet.

• In general, calibration of the instrument should be performed when elevation
at which the product is being used changes by more than 500 feet.

4.2 Temperature Effects

The MAXO

+

will hold calibration and read correctly within ±3% when in ther-

2

mal equilibrium within the operating temperature range. The device must be
thermally stable when calibrated and allowed to thermally stabilize after
experiencing temperature changes before readings are accurate. For these
reasons, the following is recommended:

• For best results, perform the calibration procedure at a temperature close to
the temperature where analysis will occur.

• Allow adequate time for the sensor to equilibrate to a new ambient temperature.

CAUTION: “CAL Err St” may result from a sensor that has not
reached thermal equilibrium.

4.3 Pressure Effects

Readings from the MAXO
gen. The partial pressure is equal to the concentration times the absolute
pressure. Thus, the readings are proportional to the concentration if the
pressure is held constant. Therefore, the following are recommended:

• Calibrate the MAXO

• If sample gases flow through tubing, use the same apparatus and flow rates
when calibrating as when measuring.

• The MAXO

+

oxygen sensor has been tested at pressures up to two

2

atmospheres absolute. Calibration or operation above this pressure is
beyond the intended use.

+

are proportional to the partial pressure of oxy-

2

+

at the same pressure as the sample gas.

2

4.4 Humidity Effects

Humidity (non-condensing) has no effect on the performance of the MAXO

MANUFACTURED BY MAXTEC

+

2

8

other than diluting the gas, as long as there is no condensation. Depending
on the humidity, the gas may be diluted by as much as 4%, which proportion­ally reduces the oxygen concentration. The device responds to the actual
oxygen concentration rather than the dry concentration. Environments where
condensation may occur are to be avoided since moisture may obstruct
passage of gas to the sensing surface, resulting in erroneous readings and
slower response time. For this reason, the following is recommended:

• Avoid usage in environments greater than 95% relative humidity.

HELPFUL HINT: Dry sensor by lightly shaking moisture out, or flow a
dry gas at two liters per minute across the sensor membrane.

5.0 CALIBRATION ERRORS AND ERROR CODES

The MAXO

+

analyzers have a self test feature built into the software to

2

detect faulty calibrations, oxygen sensor failures, and low operating voltage.
These are listed below, and include possible actions to take, if an error code
occurs.

E02: No sensor attached

+

MAXO

A: Open unit and disconnect and reconnect sensor. Unit should

2

perform an auto calibration and should read 20.9%. If not, contact Maxtec
Customer Service for possible sensor replacement.

+

MAXO

AE: Disconnect and reconnect external sensor. Unit should perform

2

an auto calibration, and should read 20.9%. If not, contact Maxtec Customer
Service for possible sensor replacement or cable replacement.

E03: No valid calibration data available

Make sure unit has reached thermal equilibrium. Press and hold the
Calibration Button for three seconds to manually force a new calibration.

E04: Battery below minimum operating voltage

Replace batteries.

CAL Err St: O2 Sensor reading not stable

Wait for displayed oxygen reading to stabilize, when calibrating the device at
100% oxygen.

Wait for unit to reach thermal equilibrium (Please note that this can take up to
one half hour, if the device is stored in temperatures outside the specified
operating temperature range).

CAL Err lo: Sensor voltage too low

Press and hold the Calibration Button for three seconds to manually
force a new calibration. If unit repeats this error more than three times,

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contact Maxtec Customer Service for possible sensor replacement.

CAL Err hi: Sensor voltage too high

Press and hold the Calibration Button for three seconds to manually
force a new calibration. If unit repeats this error more than three times, con­tact Maxtec Customer Service for possible sensor replacement.

CAL Err Bat: Battery voltage too low to recalibrate

Replace batteries

6.0 CHANGING THE BATTERIES

Batteries should be changed by service personnel.

• Use only brand name batteries.

• Replace with two AA batteries and insert per orientation marked on the

device.

Should the batteries require changing, the device will indicate this in one of two
ways:

• The battery icon on the bottom of the display will begin to flash. This

icon will continue to flash until the batteries are changed. The unit will
continue to function normally for approx. 200 hours.

• If the device detects a very low battery level, an error code of “E04” will

be present on the display, and the unit will not function until the batter­ies are changed.

To change the batteries, begin by removing the three screws from the back of
the device. A #1 phillips screwdriver is required to remove these screws.

Once the screws are removed, gently separate
the two halves of the device.

The batteries can now be replaced from the
back half of the case. Be sure to orient the new
batteries as indicated in the embossed polarity
on the back case.

NOTE: If the batteries are installed incorrectly the
batteries will not make contact and the device will
not operate.

Carefully, bring the two halves of the case together while

MANUFACTURED BY MAXTEC

FIGURE 4

10

positioning the wires so they are not pinched between the two case halves.
The gasket separating the halves will be captured on the back case half.

Reinsert the three screws and tighten until the screws are snug. (figure 4)
The device will automatically perform a calibration and begin displaying % of

oxgen.

HELPFUL HINT: If unit does not function, verify that the screws are tight
to allow proper electrical connection.

HELPFUL HINT (MAXO2+ AE): Before closing the two case halves
together, verify that the keyed slot on top of the coiled cable assembly
is engaged on the small tab located on the back case. This is designed
to position the assembly in the correct orientation and prevent it from
rotating. Improper positioning could hinder the case halves from closing
and prevent operation when tightening the screws.

7.0 CHANGING THE OXYGEN SENSOR

7.1 MAXO

®

+A Model

2

Should the oxygen sensor require changing, the
device will indicate this by presenting “Cal Err
lo” on the display after initiating a calibration.

To change the oxygen sensor, begin by

Lock Lever

removing the three screws from the back of
the device. A #1 Phillips screwdriver is
required to remove these screws.

Once the screws are removed, gently separate

FIGURE 5

the two halves of the device.
Disconnect the oxygen sensor from the printed circuit board by pressing the

un-lock lever first and then pulling the connector out of the receptacle

.

The oxygen sensor can now be replaced from the back half of the case.

HELPFUL HINT: Be sure to orient the new sensor by aligning the red
arrow on the sensor with the arrow in the back case. A small tab is
located on the back case that is designed to engage the sensor and pre­vent it from rotating within the case. (figure 5)

NOTE: If the oxygen sensor is installed incorrectly, the case will not
come back together and the unit may be damaged when the screws are
reinstalled.

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Note: if the new sensor has red tape over the outside, remove it and wait 30
minutes before calibrating.

Reconnect the oxygen sensor to the connector on the printed circuit board.
Carefully bring the two halves of the case together while positioning the wires

to ensure they are not pinched between the two case halves. Make sure the
sensor is fully inserted and in the proper orientation.

Reinsert the three screws and tighten until the screws are snug. Verify the
unit operates properly.

The device will automatically perform a calibration and begin displaying % of
oxygen.

7.2 MAXO2+AE Model

Should the oxygen sensor require changing, the device will indicate this by
presenting “Cal Err lo” on the display.

Unthread the sensor from the cable by rotating the thumbscrew connector
counterclockwise and pull the sensor from the connection.

Replace the new sensor by inserting the electrical plug from the coiled cord
into the receptacle on the oxygen sensor. Rotate the thumbscrew clockwise

until snug.
The device will automatically perform a calibration and begin displaying % of oxy-

gen.

8.0 CLEANING AND MAINTENANCE

Store the MAXO
ment of daily use.

The instruction given below describes the methods to clean the instrument,
sensor and its accessories:

+

analyzer in a temperature similar to its ambient environ-

2

Instrument

• When cleaning or disinfecting the exterior of the MAXO

appropriate care to prevent any solution from entering the instrument.
Do not immerse unit in fluids.

+

analyzer, take

2

Oxygen Sensor

• Clean the sensor with a cloth moistened with a 65% alcohol/water

solution.

• Maxtec does not recommend use of spray disinfectants because they can

MANUFACTURED BY MAXTEC

12

contain salt, which can accumulate in the sensor membrane and impair

readings.

Accessories

• The threaded barbed adapter may be cleaned by washing them with a
65% alcohol/water solution (per manufacturer’s instructions). The parts
must be thoroughly dry before they are used.

Because of the variability of the cleaning processes, Maxtec cannot provide
specific instructions. Therefore, we highly recommend referring to the manu­facturer’s instructions on the details of method.

9.0 SPECIFICATIONS

9.1 Base Unit Specifications

Measurement Range: 0-100%
Resolution: 0.1%
Accuracy and Linearity: 1% of full scale at constant temperature, R.H. and

pressure when calibrated at full scale.

Total Accuracy: ±3% actual oxygen level over full operating

temperature range.

Response Time: 90% of final value in approximately 15 seconds at

23°C.
Warm-up Time: none required
Operating Temperature: 15°C - 40°C (59°F - 104°F)
Storage Temperature: -15°C - 50°C (5°F - 122°F)
Humidity: 0-95% (non-condensing)
Power Requirements: 2, AA Alkaline batteries (2 x 1.5 Volts)
Battery Life: approximately 5000 hours with continuous use
Low Battery Indication: “BAT” icon displayed on LCD
Sensor Type: Maxtec MAX-250 galvanic fuel cell
Expected Sensor Life: >1,500,000 O

typical applications
A Model Dimensions: 3.0”(W) x 4.0”(H) x 1.5”(D) [76mm x 102mm x

38mm]
A Weight: 0.4 lbs. (170g)
AE Model Dimensions: 3.0”(W) x 36.0”(H) x 1.5”(D) [76mm x 914mm x

38mm] Height includes external cable length
(retracted).
AE Weight: 0.6 lbs. (285g)

percent hours minimum 2-years in

2

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9.2 Sensor Specifications

Type: Galvanic fuel sensor (0-100%)
Life: 2-years in typical applications

10.0 MAXO

+

SPARE PARTS AND ACCESSORIES

2

10.1 Included With Your Unit

Part Number Item

R217M42 Industrial Guide and Operating Instructions
RP76P06 Lanyard
R207P17 Threaded Adapter with Tygon Tubing
R110P10 Flow Diverter
R218P19 Oxyknob Adapter

R217P35 Dovetail Bracket X

A Model AE Model

X X
X X
X X
X
X

10.2 Standard Replacement Parts

Part Number Item

R125P02-013 MAX-250+ Internal Oxygen Sensor
R125P03-004 MAX-250E External Oxygen Sensor
R115P85 MAX-250ESF External Oxygen Sensor
R217P08 Gasket
R217P09-002 Overlay
R217P11-001 Back Assembly
R217P16-002 Front Assembly (Includes Board and LCD)
R217P24 Coiled Cable Assembly
RP06P25 #4-40 Pan Head Stainless Steel Screw

X
X
X
X X
X X
X X
X X
X
X X

BAT

CAL

10.3 Optional Accessories

10.3.1 Optional Adapters

Part Number Item

RP16P02 “T” Adapter (15mm I.D.)
RP16P09 Scuba Pro Adapter
R101P01 Flow Thru Head
RP11P28 BC Adapter

MANUFACTURED BY MAXTEC.

14

10.3.2 Mounting Options (requires dovetail-R217P23)

Part Number Item

R103P01 M16 x 1 Maxtec Nut
R205P86 Wall Mount
R213P31 Swivel Mount

10.3.3 Carrying Options

Part Number Item

R213P02 Zipper Carrying Case with Shoulder Strap
R213P56 Water Tight Carrying Case, Large (9” x 11”)
R213P90-001 Water Tight Carrying Case, Small (8” x 4”)
R217P22 Belt Clip and Pin Assembly
R217P32 Soft Case, Tight Fit Carrying Case

Equipment in need of factory repair shall be sent to:
Maxtec

Service Department
6526 South Cottonwood Street
Salt Lake City, Ut 84107

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WWW.MAXTEC.COM