Cosmed K4B2, User Manual

Page: 20 / 42

20 - K4 b
2
User Manual
System overview
Portable Unit (PU)
It is fixed to the patient during the test by an anatomic
harness. The PU contains the O
2
and CO
2
analyzers, sampling
pump, UHF transmitter, barometric sensors and electronics. It
is powered by the rechargeable battery fixed to the back side
of the harness.
K4 b² is also provided with a small display, the PU shows in
real time the following parameters: VT, VE, VO
2
, VCO
2
, R,
HR, Rf Marker, battery charge level, temperature and
barometric pressure.
USA and Japan versions have the antenna not detachable from
the portable unit.
Besides data processing and presentation, the Portable Unit
has the following functions:
•
Patient data input
•
Environment data input (humidity)
•
Gas and turbine calibration (automatic)
•
Memory functions
•
Tests data management
•
Data loading to a PC (via RS232)
Telemetry Data Transmission, Receiver Unit (RU)
The RU consists of a small unit connected to a PC through the
RS 232 serial port. The transmission is achieved by a
miniaturized transmitter module located inside the Portable
Unit.
Battery Charger Unit (CU)
The CU allows the simultaneously charge of the 3 Ni-Cd
batteries and to supply the PU during the warm up time.