Maxtec Handi+N2 User manual

E
Handi+N2
OPERATING MANUAL &
INSTRUCTIONS FOR USE
R218M06
Industrial
R218M06 Rev. E
N
2

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Maxtec TEL [phone]
2305 S 1070 W FAX [phone]
Salt Lake City, Utah 84119 www.maxtec.com
USA
CLASSIFICATION
Protection against electric shock: ..........................Internally powered equipment.
Protection against water: ....................................................IPX1
Mode of Operation: ...................................................Continuous
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 N2 analyzer is designed for oxygen delivery equipment and systems.
Under normal operating conditions, we warrant the N2 analyzer to be free
from defects of workmanship or materials for a period of 2- years from the
date of shipment provided that the unit is properly operated and maintained
in accordance with our operating instructions. Based on our product
evaluation our 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 us or through our designated distributors and agents as new equipment.
Our warrants the oxygen sensor in the N2 analyzer to be free from defects in
material and workmanship for a period of 2-years from the date of shipment
in a N2 analyzer. 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. We 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.
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WARNINGS
Indicates a potentially hazardous situation, if not avoided, could result in
death or serious injury.
»Never allow an excess length of tubing, or any accessory near a person’s head or
neck, which may result in strangulation.
»Before use, all individuals who will be using the N2 Analyzer must become thoroughly
familiar with the information contained in this Operation Guide.
»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 accessories and replacement parts. Failure to do so may seriously
impair the analyzer’s performance.
» Repair or alteration of the N2 Analyzer beyond the scope of the maintenance
instructions, or by anyone other than an authorized service person, could cause the
product to fail to perform as designed.
» Calibrate the N2 analyzer weekly when in operation, or if environmental conditions
change significantly. (ie, Elevation, Temperature, Pressure, Humidity — refer to
“Factors Influencing Accurate Readings”).
» Use of the N2 analyzer near devices that generate electrical fields may cause erratic readings
» Ensure proper tire inflation pressure after use, if required.
» The 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 for proper disposal or recovery.
» Dropping the device can adversely affect its performance.
Do not immerse the device in any cleaning solution, autoclave or expose the sensor
to high temperatures (> 70°C).
Do not over pressurize the sensor. Doing so may destroy the sensor and void the
warranty. To avoid over pressurization only allow 3 psi (or 2 liters per minute) of
gas to come in contact with the sensor membrane.
CAUTION:
Indicates a potentially hazardous situation, if not avoided, could result in
minor or moderate injury and property damage.
»Read the manual in its entirety before attempting use.
»
Always use protective eyewear and observe proper safety procedures when working
with pressurized gases.
»Dispose of the N2 properly when it has expired.
»Ensure the protective freshness seal has been removed from the sensing port before use.
»Ensure the N2 has been properly calibrated before use.
»If the N2 display goes blank immediately after the on button is pushed, or the
N2 will not properly calibrate, the unit has expired.
Do not use, dispose of properly.
»The display is not valid when in Over Range Mode. Recalibrate the N2 and
observe the proper operating procedure.
»Never immerse the N2 or expose it to high humidity or moisture. It is not watertight.
»Never expose the N2 to high temperatures.
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TABLE OF CONTENTS
CLASSIFICATION, WARRANTY ..................................... I
WARNINGS, CAUTION ...........................................II
TABLE OF CONTENTS ..........................................III
SYMBOL GUIDE............................................... IV
1.0 INTRODUCTION.............................................1
2.0 N2 ANALYZER FEATURES AND FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . 1
3.0 PRE-USE CHECKOUT/CALIBRATION ..............................2
4.0 OPERATION PRINCIPALS ......................................2
5.0 FACTORS INFLUENCING ACCURATE READINGS .....................2
6.0 CALIBRATION ERRORS AND ERROR CODES ........................4
7.0 CLEANING, MAINTENANCE, AND DISPOSAL........................4
8.0 SPECIFICATIONS ............................................5
8.1 Analyzer Specifications ...........................................5
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SYMBOL GUIDE
The following symbols and safety labels are found on the the Handi+:
Do not throw away. Follow local
guidelines for disposal.
!
Follow instructions for use
Do Not
On/off Button
Warnings
Calibration Button
Meets ETL standards
LOT
IPX1
Lot code/Batch code
Drip Proof
SN Serial Number
REF Catalog Number
Manufacturer
Contains acid
Contains lead
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Follow instructions for use
Do Not
Calibration Button
Lot code/Batch code
Drip Proof
Serial Number
Catalog Number
1.0 INTRODUCTION
This manual describes the function; operation and maintenance of the N2
Analyzer. The intent of this manual is to describe the function of the N2
Analyzer only. The final assembly manufacturer should provide operating
instructions for the completed assembly. The N2 analyzer is engineered for
long life, maximum reliability and stable performance.
NOTE: In order to obtain optimum performance from your 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. We
cannot warranty any damage resulting from misuse, unauthorized repair or
improper maintenance of the instrument.
2.0 N2 ANALYZER FEATURES AND FUNCTIONS
LCD Display: A 3-digit display provides a direct readout of nitrogen
concentration in the range of 0 - 99.9%. The display is blank when the N2
Analyzer enters its sleep (power off) mode. The N2 Analyzer will automatically
enter the sleep mode after 2 minutes from the last time the unit was energized.
You can manually turn off the analyzer by pressing the on/off switch.
ON Button/Auto OFF: Use this button to turn the N2 Analyzer on or off. When
the N2 Analyzer is in the Sleep (power off) mode, the LCD display is blank.
When the ON button is pressed once, the analyzer will display the nitrogen
concentration for 2 minutes. Pressing the ON button during this 2 minute
"window" will prolong the ON period to 2 minutes from the most recent time
that the button was pushed.
Over Range Indicator: The appearance of a decimal point after the first digit
means that the N2 Analyzer is reading in excess of 99.9%.
Example: 0.0.0 = 100% 0.0.1 = 101%
0.0.2 = 102% (etc).
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.
Oxygen Sensor: This is used to measure oxygen concentration in sample gas.
Sample Inlet Connection: This is the port at which the device is connected to
determine nitrogen concentration.
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3.0 PRE-USE CHECKOUT/CALIBRATION
Follow these steps before using the N2 Analyzer
1. 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. Pre-assembly, if required.
• Thread the barbed adapter onto the oxygen sensor.
•Connect the clear tubing to the barbed adapter.
3. Using the "ON/OFF" key , make sure the unit is in the power "ON” mode.
4. Press and hold the Calibration Key for 3 seconds until the display
reads “CAL”. This will calibrate the N2 Analyzer to room air. Thereafter, we
recommend calibration on a weekly basis.
A new calibration is required when:
•The measured N2 percentage in 79.1% N2 is above 80.1% N2
•The measured N2 percentage in 79.1% N2 is below 78.1% N2
•If you are unsure about the displayed N2 percentage. (see Factors
influencing accurate readings.)
5. The N2 Analyzer is ready to use.
4.0 OPERATION PRINCIPALS
The instrument display corresponds directly to the oxygen sensor. The oxygen
diffuses through the membrane and an electrical current is generated that is
proportional to the partial pressure of oxygen in the gas sample. The oxygen
percentage is subtracted from 100, with the remainder being displayed as
percent nitrogen. The sensor has a minimal response to gases other than oxygen.
5.0 FACTORS INFLUENCING ACCURATE READINGS
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.
Temperature Effects
The N2 analyzer will hold calibration and read correctly within ±3% when in
thermal 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.
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•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.
Pressure Effects
Readings from the N2 analyzer are proportional to the partial pressure of
oxygen. 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 N2 analyzer at the same pressure as the sample gas.
•If sample gases flow through tubing, use the same apparatus and flow rates
when calibrating as when measuring.
•The N2 analyzer oxygen sensor has been tested at pressures up to two
atmospheres absolute. Calibration or operation above this pressure is beyond
the intended use.
Humidity Effects
Humidity (non-condensing) has no effect on the performance of the N2
analyzer 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.
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6.0 CALIBRATION ERRORS AND ERROR CODES
The N2 analyzers have a self test feature built into the software to 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.
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
Unit is at end of life, see page I for proper disposal.
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, 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
Unit is at end of life, see page I for proper disposal.
7.0 CLEANING, MAINTENANCE, AND DISPOSAL
Store the N2 analyzer in a temperature similar to its ambient environment of
daily use. The instructions given below describes the methods to clean the
instrument, sensor and its accessories:
Instrument
•When cleaning or disinfecting the exterior of the N2 analyzer, take
appropriate care to prevent any solution from entering the instrument.
Do not immerse unit in fluids.
Oxygen Sensor
•Clean the sensor with a cloth moistened with a 65% alcohol / water solution.
•We do not recommend use of spray disinfectants because they can contain
salt, which can accumulate in the sensor membrane and impair readings.
Do not throw away. Dispose of properly in accordance with local regulations.
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Accessory
•The threaded barbed adapter may be cleaned by washing it with a 65%
alcohol / water solution. The part must be thoroughly dry before it is re-used.
8.0 SPECIFICATIONS
8.1 Analyzer Specifications
Sensor Type: ...........................................Galvanic fuel cell
Measurement Range: ....................................0-99.9% Nitrogen
Resolution/Display:................................................0.1%
The three digit LCD indicates values between 0.0 - 99.9% oxygen.
Over range indicated by one decimal point on display located after the first digit.
Accuracy and Linearity: ........± 1% of full scale at constant temperature, R.H. and
@ 15˚C - 40˚C pressure when calibrated at full scale.
± 3% actual oxygen level over full operating temperature.
Response Time: ....................< 15 seconds for 90% step change. (at 25˚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)
Operating Pressure: ...........................Atmospheric pressure to 3psig.
Environmental: ..................General purpose housing equivalent to NEMA 1.
The Handi+ is not waterproof. 0-95% RH, non-condensing.
Warranty: ....................Twenty-four months in normal operating conditions.
Power Requirements: ...............................Powered by one internal,
non-replaceable Lithium battery, CR2450.
Power on push button automatically shuts off after 80 seconds time-out.
Electronics rated general purpose;
not for use in hazardous areas or for use with flammable gases.
Weight:...............................................Approx. 3 Ounces
Battery Life: .............................Approx. 1850 hours (74,000 cycles)
Sample Port: .......................M16 x1 Thread with barbed tubing adapter.
Operating Pressure: ...........................Atmospheric pressure to 3 psig
Expected Storage Life : .................Two months with freshness seal on sensor.
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