Maxtec R229P01-024 Bedienungsanleitung Seite 12

7.0 ABBREVIATION GUIDE
TERM DESCRIPTION
Air/O2 Mixture of compressed air and oxygen
°C Degrees Celsius
CGA Compressed Gas Association
DISS Diameter Indexed Safety System
°F Degrees Fahrenheit
FiO2 Fractional Concentration of Inspired Oxygen
O2 Oxygen
LPM Liters Per Minute
PSIG Pounds Per Square Inch Gauge
8.0 SPECIFICATIONS
8.1 Instrument Specifications
Weight (unpackaged) ................................................................................................ 5.3 lbs. (2.4 kg.)
Power Source .......................................................................Four "AA" alkaline batteries, 1.5 V each
Battery Life ..........................................................5000 hours (continuous operation, no alarming)
Oxygen Measurement Range..............................................................................0% to 100% oxygen
Display Resolution ............................................................................................................0.1% oxygen
O2 Concentration Adjustment Range ........................................................................ 21% to 100% O2
Gas Supply Pressure .......................The gas supplies must provide clean, dry, medical-grade air
and oxygen at a pressure of 30 to 75 PSIG (2.0 to 5.2 BAR).
Pressure Drop ........................................................Less than 6 PSIG (0.4 BAR) @ 50 PSIG (3.4 BAR)
Sensor Bleed Flow .................................................................................. 0.1LPM @ 50 PSIG (3.4 BAR)
Bleed Flow (toggle ON) .................3 LPM for low flow blender and 13 LPM for high flow blender
Outlet Flow Range ............................ 0-30 LPM for low flow blender and 2-100 LPM for high flow
blender with inlet pressures at 50 PSIG (3.4 BAR)
Mixed Gas Stability* Ambient Operating Conditions ..................................................... ±1% oxygen
Operating Temperature Range ..............................................................59°F to 104°F (15°C to 40°C)
Relative Humidity Range.............................................................................0-95%, non-condensing
Ambient Storage Conditions Temperature Range ................................ 5°F to 122°F (-15°C to 50°C)
Flowmeter accuracy** ....................... +/-10% of indicated value or 0.5 LPM whichever is greater,
Flush Flow ............................................................................................. 3 LPM Flowmeter: 20-30 LPM
*The delivered oxygen concentration will remain constant within ±1% of the set point value
with constant inlet pressures. The displayed value may vary more than this due to sensor
accuracy, age, environmental conditions, and the length of time since last sensor calibration.
**Position the device such that the flowmeters are vertical to ensure accuracy.
8.2 Alarm Specifications
Pressure Differential Alarm Activation ............................When supply pressures differ by 20 PSI
Low Oxygen Alarm Range ....................................................15%-99% (>1% lower than high alarm)
High Oxygen Alarm Range ......................... 16%-100% (>1% higher than low alarm) (according to
Alarm Volume (all priorities) ...............................................................72 dB(A) ± 7 dB(A) at 1 meter
ENGLISH
Air and oxygen must be within 20 PSI (1.3 BAR). Optimal
performance is achieved at 50 PSIG inlet pressures.
supply pressures and 10 LPM flow rate
with inlet pressure set to 50PSIG.
15 LPM Flowmeter: 20-30 LPM
30 LPM Flowmeter: 35-45 LPM
70 LPM Flowmeter: 70-80 LPM
(1.3 BAR) or more alarm is activated
IEC 60601-1-8 Audible Alarms in Medical Equipment)
8.3 O2 Sensor Specifications
Total accuracy* ......................... ±3% actual oxygen level over full operating temperature range
Oxygen Measurement Accuracy ...................................................................................... ±1% oxygen
Linearity ....................................................................... ± 1% at constant temperature and pressure
Error Over Operating Temp Range ............................................................. ±3% oxygen, maximum
Response Time to 90% of Final Reading* ............................................ @ 77°F (25°C) ≤20 seconds
Storage Temperature Range ................................................................... 5°F to 122°F (-15°C to 50°C)
Expected Useful Life ......................................1,500,000 O2% hours (approx. 2 years average use)
*The accuracy of the oxygen monitor is not affected by supply gas inlet pressure to the
blender, however, pressures below 50 PSIG may result in a longer response time.
NOTE: All specifications assume the following standard environmental conditions, unless
specified otherwise:
Ambient and sample gas temperatures of 77°F (25°C)
•
Barometric pressure of 30 inHg (102 kPa)
•
Ambient relative humidity of 50%
•
Sample gas relative humidity of 0%
•
9.0 FACTORS INFLUENCING
CALIBRATION
9.1 Temperature Effect
The MaxBlend 2 Monitor will hold calibration and read correctly within +/-3% when in thermal
equilibrium within the operating temperature range.
The device accuracy will be better than +/-3% if operated at the same temperature at which
it was calibrated. The device must be thermally stable when calibrated and allowed to ther-
mally stabilize after experiencing temperature changes before reading is accurate. For these
reasons, the following is recommended:
1. Allow adequate time for the sensor to equilibrate to a new ambient temperature.
Please note that this can take up to one half hour, if the device is stored in
temperatures outside the specified operating temperature range.
2. For best results, perform the calibration procedure at a temperature close to the
temperature where analysis will occur.
9.2 Pressure Effect
Changes in barometric pressure can affect the oxygen reading. A 1% change in the barometric
pressure results in an error of 1% of actual reading (Example: If you are reading a 50% oxygen
mix and the barometric pressure drops from 30kPa to 29kPa, the reading will drop to: 50% x
(29/30) = 48.3%. Maxtec recommends that you recalibrate after changing point-of-use eleva-
tion by more than 500 feet (150m).
9.3 Humidity Effect
Humidity in the sample gas will affect the oxygen reading. Maxtec recommends that the gas
delivered to the MaxBlend 2 be medical-grade, clean, and dry. Refer to ISO 7396-1 for further
details.
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