Frequently Asked Questions - Maxtec Handi+ Instructions For Use Manual

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
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
Warranty: ..................................................................Two (2) years in normal operating conditions
Power Requirements: ................................................................................Powered by one internal,
Power on push button automatically shuts off after 80 seconds time-out.
Sensor Type: ......................................................................Maxtec MAX-250 series galvanic fuel cell
Weight: .................................................................................................................... Approx. 60 grams
2.45 in
7.2 Effect of Interferent Gases and Vapors
GAS VOLUME % DRY
Nitrous Oxide 75%
Halothane 5%
Isoflurance 5%
Enflurane 5%
Sevoflurane 6%
Desflurane 15%
Carbon Dioxide 10%
Helium 70%
WWW.MAXTEC.COM • (800) 748-5355
pressure when calibrated at full scale
The Handi+ is not waterproof
non-replaceable Lithium battery, CR2450.
Electronics rated general purpose; not for use in
hazardous areas or for use with flammable gases.
0.90 in
INTERFERENCE IN O2
< 2%
< 2%
< 2%
< 2%
< 2%
< 2%
< 2%
< 2%
8.0 HANDI+ SPARE PARTS AND
ACCESSORIES
8.1 Standard Replacement Parts and
Accessories
PART NUMBER
R218M12
RP16P02
R110P10-001
R207P17
R100P92-002
RP76P06
R218P09
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.
5
ITEM
Operation Manual, Handi+
"T" Adapter
Flow Diverter Fitting
Barbed Adapter
Clear Tubing
Lanyard
Handi+ Cover
ENGLISH