Operating Principles; Miniox ® 3000 Oxygen Sensor; Miniox ® 3000 Instrument; Operator Interface - Ohio Medical Corporation MiniOX 3000 Manual De Instrucciones

MiniOX 3000 Oxygen Monitor
®
electrodes. A coiled cable connects the sensor to the
instrument. Plugs at each end of the cable snap into
jacks (one located in the sensor housing and one
located in the instrument) and are held securely in
place by twist collars.
The oxygen sensor is introduced into a breathing
circuit through an Ohio Medical Corporation Tee
Adapter connecting two lengths of tubing. The
Sensor/Tee Adapter Assembly is positioned with the
sensor deflector pointing downward to ensure that
moisture does not collect on the sensor membrane.
The retaining strap ensures that the sensor remains
securely in place in the tee adapter.
See the following appendices:
• Appendix A, Specifications
• Appendix F, Accessories/Replacement Parts

Operating Principles

MiniOX 3000 Oxygen Sensor
®
The oxygen sensor includes two electrodes:
• a gold cathode exposed to the atmosphere
through a fluoropolymer membrane
• a lead anode submersed in a potassium
hydroxide solution
When oxygen diffuses through the membrane, the
electrochemical reduction of oxygen on the cathode
and the corresponding oxidation on the anode
generate an electrical current proportional to the
partial pressure of oxygen in the sample atmosphere.
The instrument temperature compensates, amplifies,
and converts the electrical current, displaying O
values.
The Ohio Medical Corporation oxygen sensor is self-
zeroing; when no oxygen is present:
• no current is produced
• 0% oxygen is displayed
The sensor has a minimal response to gases other
than oxygen (See Appendix C, Interferent Gases and
Vapors).
MiniOX 3000 Instrument
®
The MiniOX 3000 Oxygen Monitor is battery-powered
®
and microprocessor-controlled. The microprocessor:
• provides the operator interface
1-2
• controls internal functions
• monitors data and system status

Operator Interface

When the operator enters commands using the
keypad, the microprocessor interprets these
commands and responds by:
• displaying text in the LCD
• activating the LEDs
• emitting audible tones

Internal Functions

During operation, the microprocessor coordinates all
internal functions including:
• self-testing
• response to keypad commands
• data collection
• display update
• confirmation that a programmed sequence is
properly followed

Data and System Status

The signal from the oxygen sensor is amplified
and converted to a digital value through electronic
circuitry. Following software compensation, the
microprocessor:
• compares current data to preselected values
• displays the updated O
• if appropriate, activates audible and visual
2
alarms
The microprocessor also monitors internal systems,
indicating such operating conditions as:
• calibration required
• low battery voltage
• sensor disconnect
• system error

Performance Features

Calibration

The MiniOX
®
calibrated:
• daily, while in operation
711449 (Rev.3) 02/2016
Section 1, Introduction
concentration
2
3000 Oxygen Monitor must be