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3
ENGLISH
1.0 INTRODUCTION
1.1 Component Identification
LCD DISPLAY:
A 3-digit display provides a
direct readout of oxygen concentration in
the range of 0 - 100%. The display is blank
when the Handi+ enters its Sleep (power
off) mode. The Handi+ will automatically
enter the Sleep mode after approximately
2 minutes from the last time the ON button
was pressed.
ON/OFF BUTTON:
Use this button to turn the
Handi+ on and off. When the Handi+ is in the
Sleep (power off) mode, the LCD display is
blank. The analyzer turns off after 2 minutes
if no buttons are pressed.
CALIBRATION BUTTON:
Press the calibration (CAL) button to adjust the calibration value to
reflect the known oxygen concentration. To simplify operation, the Handi+ Analyzer automati-
cally determines the calibration gas being used as room air (20.9%) or high grade (100%).
FLOW DIVERTER:
The flow diverter is designed to fit industry standard 15 mm I.D. "T" adapters.
OVER RANGE INDICATOR:
The appearance of a decimal point after the first digit means that the
Handi+ is reading in excess of 99.9%.
Example: 0.0.0 = 100% 0.0.1 = 101% 0.0.2 = 102%
(If the display reads > 0.0.3 the Handi+ should be re-calibrated.)
1.2 Description
The Maxtec Handi+ oxygen analyzer is designed to monitor oxygen concentration in the patient-
breathing environment. It is one of a full line of oxygen analyzers by Maxtec. The Handi+ oxygen
analyzer utilizes the Maxtec MAX-250 oxygen sensor and is engineered for fast response, maxi-
mum reliability and stable performance. The Handi+ is designed primarily for spot-checking of
oxygen levels delivered by medical oxygen delivery equipment and respiratory care systems.
Its lightweight, compact size, extended battery life, and "auto off" feature makes this oxygen
analyzer ideal for portable oxygen analysis by qualified heath care professionals.
2.0 CALIBRATING THE HANDI+
2.1 Before You Begin
A protective film covering the threaded sensor face must be removed and the sensor allowed
to “breath” for at least 30 minutes. Next, the Handi+ Oxygen Analyzer should be calibrated.
Thereafter, Maxtec recommends calibration on a weekly basis. However, more frequent cali-
bration will not adversely affect product performance.
2.2 Calibrating the Handi+ Oxygen Analyzer
Calibration of the instrument is necessary if the temperature of the gas stream changes by
more than 3 degrees Celsius.
Changes in elevation result in calibration error of approximately 1% of reading per 250 feet. In
general, calibration of the instrument should be performed when the geographic elevation at
which the product is being used changes by more than 500 feet.
In addition, calibration is recommended if the user is unclear when the last calibration proce-
dure was performed or if the measurement value displayed is in question.
Calibrate the Handi+ to an oxygen source, which has a traceable certificate and/or USP certifi-
cation, of either 20.9% oxygen, as found in room air, or 100% oxygen. It is recommended that
the oxygen source be documented at a pressure and flow similar to your clinical application.
NOTE:
Before beginning calibration the Handi+ must be in thermal equilibrium. You may also
need to be aware of other factors, which affect device calibration values. For more informa-
tion, refer to section 4.0 "Factors Influencing Calibration and Performance" of this manual.
NOTE:
We recommend use of medical grade USP or >99% purity oxygen when calibrating the
Handi+.
2.3 In Line Calibration (Configuration A)
1. Put the Handi+ in an upright position such that you can read the product label.
2. Connect a sample supply hose to a standard "T" adapter The Maxtec "T" is
precision-tapered to insure a tight connection with O-rings of the MAX-250 oxygen
sensor diverter.
3. Insert the Handi+ in the center position of the "T" adapter.
4. Attach an open-ended reservoir to the end of the "T" adapter. Then start the
calibration flow of oxygen at 1-10 liters per minute.
NOTE:
Six to 10 inches of corrugated tubing works well as a reservoir.
NOTE:
A calibration oxygen flow to the Handi+ of 2 liters per minute is recommended to mini-
mize the possibility of obtaining a "false" calibration value.
5. Allow the oxygen to saturate the sensor. Although a stable value is usually
observed within 30 seconds, allow at least 2 minutes to ensure that the sensor is
completely saturated with the calibration gas.
6. If the Handi+ is not already turned on, do so now by pressing the analyzer ON
button
.
7. Press the “CAL”
button on the Handi+. The calibration gas value on the
analyzer display should read 20.9 or 100 depending on the gas stream used.
2.4 Direct Flow Calibration (Configuration B)
1. Attach the Barbed Adapter to the Handi+.
2. Connect the clear sampling tube to the Barbed Adapter.
3. Attach the other end of the clear sampling tube to a source of oxygen with a
known oxygen concentration value and initiate flow of the calibration gas to the
unit at a rate of 1-10 liters per minute (2 liters per minute is recommended).
4. Allow the oxygen to saturate the sensor. Although a stable value is usually
observed within 30 seconds, allow at least 2 minutes to ensure complete
saturation of the sensor with the calibration gas.
5. If the Handi+ is not already turned on, do so now by pressing the analyzer “ON”
button
.
6. Press the “CAL”
button on the Handi+. The calibration gas value on the
analyzer display should read 20.9 or 100 depending on the gas stream used.
Configuration A
"T" Adaptor
Configuration B
Clear Tubing
Barbed Adapter
(To gas)
Flow Diverter
LCD DISPLAY
CALIBRATION
BUTTON
"ON" BUTTON