WWW .MAXTEC .COM • (800) 748-5355
5
ENGLISH
7.0 HANDI+ SPECIFICATIONS
7.1 Analyzer Specifications
Measurement Range ..................................................................................0.0 - 99.9% oxygen (gas)
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
pressure when calibrated at full scale
Total Accuracy ........................................±3% actual oxygen level over full operating temp range
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)
Atmospheric Pressure ................................................................................................ 800-1013 mBars
Humidity ......................................................................................................0-95%(non-condensing)
Environmental .......................................................General purpose housing equivalent to NEMA 1
The Handi+ is not waterproof
Warranty ...................................................................Two (2) years in normal operating conditions
Power Requirements .................................................................................Powered by one internal,
non-replaceable Lithium battery, CR2450.
Power on push button automatically shuts off after 2 minutes time-out.
Electronics rated general purpose; not for use in
hazardous areas or for use with flammable gases.
Sensor Type .......................................................................Maxtec MAX-250 series galvanic fuel cell
Weight ..................................................................................................................... Approx. 60 grams
7.2 Effect of Interferent Gases and Vapors
GAS
VOLUME % DRY
INTERFERENCE IN O2
Nitrous Oxide
75%
< 2%
Halothane
5%
< 2%
Isoflurance
5%
< 2%
Enflurane
5%
< 2%
Sevoflurane
6%
< 2%
Desflurane
15%
< 2%
Carbon Dioxide
10%
< 2%
Helium
70%
< 2%
8.0 HANDI+ SPARE PARTS AND
ACCESSORIES
8.1 Standard Replacement Parts and
Accessories
PART NUMBER
ITEM
R218M12
Operation Manual, Handi+
RP16P02
"T" Adapter
R110P10-001
Flow Diverter Fitting
R207P17
Barbed Adapter
R100P92-002
Clear Tubing
RP76P06
Lanyard
R218P09
Handi+ Cover
9.0 FREQUENTLY ASKED
QUESTIONS
After I calibrate to 20.9%, the display changes as
much as ± 1%.
•
This is within the normal Handi+ operating tolerance of ± 1% when temperature
and pressure are constant.
I have calibrated to 99.9% but when I check my oxy-
gen delivery equipment, the Handi+ reads ".0.4" or
greater (Over Range Indicator).
•
It is recommended that you conduct the calibration procedure again to get
another reading. The most likely cause is that the Handi+ has received a "false"
calibration value.
•
Make sure that the calibration gas is connected to the Handi+ at 2 liters per minute
for a minimum of 2 minutes prior to proceeding with calibration.
•
This 2-minute equilibration time is necessary to insure that the sensor is
completely saturated with the calibration gas.
I have found the reading to drift greater than ± 3%
from a know source value. What is the possible cause?
•
The sensor may be at or near its useful life.
•
Replace your Handi+.
•
Sensor life is dependent on the oxygen concentration exposure.
For example, a sensor which is used to check flow meters once a week for 8 hours
will outlast one which is used to analyze oxygen blender performance 24 hours
per day, 5 days a week.
2.45 in
0.90 in
2.91 in
1.44 in