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2 General Description
2-14
Service Manual – Osmetech OPTI™ Analyzer
Assemblies
The Osmetech OPTI consists of several major components and
assemblies that control the operation of the analyzer. A brief function
description of the assemblies is provided below.
Valves
Valve
The gas valve module controls the delivery of the internal
calibration gas. The gas valve module incorporates a pressure
regulator, pressure sensor, gas valve and a three-way valve.
Vdrive
The valve drive assembly is a stepper motor that controls the
positioning of the cassette valve.
Pump
The peristaltic pump assembly is a stepper motor and pump
cartridge that provides for the pump flow used to transport
sample and calibrator material through the cassette.
Modular Components
•
The sample measurement chamber (SMC) assembly provides
thermostated heating control of the measuring chamber at
37 °C
±
0.1 °C (98.6 °F
±
0.18 °F).
•
The optics module is a microprocessor-based assembly that houses
the optics detectors, preamplifiers and processing circuitry for optode
sensor signals.
•
The main board includes the main microprocessor, RAM and EPROM
memory and control circuitry for the LCD display, keyboard, printer
motors, barcode and serial interface.
•
The Osmetech OPTI Cassette contains the optode sensor used to
measure the sample and also includes the reservoir for reagent and
sample waste.
•
The Osmetech OPTI CCA (only) SMC cover provides optics and
processing circuitry for ctHb/SO
2
measurement.
•
A minimal amount of tubing is used in the Osmetech OPTI system.
•
Storage compartment.
•
Liquid crystal display, 2 lines x 24 characters per line.
•
Keyboard with numeric keys,
l
and
r
keys,
J
and
E
keys.
•
Thermoprinter.
•
Serial RS 232 C or Infrared (Osmetech OPTI CCA only) - interface
•
Barcode reader