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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 procedure 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 certification, 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 information, refer to "Factors Influencing Calibration and
Performance" on page 5 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" piece. 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" piece.
4. Attach an open-ended reservoir to the end of the "T" piece. 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 minimize 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.
Follow instructions for use
On/off Button
Calibration Button
Authorized Representative
in the European Community
Lot code/Batch code
Drip Proof
Serial Number
Catalog Number