Chapter 3 - Installation - 35
Receiver Unit
Optionally the K4 b
2
is provided with a transmitter board (located inside the K4 b
2
unit)
and a Receiver Unit to monitor "on-line" exercise tests performed either in the field or
in the lab. All data measured by the K4 b
2
are transmitted "breath by breath" to the
Receiver Unit in real time. The RU (illustrated below) must be connected to a Personal
Computer with any RS 232 serial port to display data "on-line" in the management
software. The transmission range is 800 meters in open field. However during
transmission the test is stored in the memory of the K4 b
2
Unit so that, in case of
transmission interference no data is lost.
Turning on/off the receiver unit
To turn the receiver unit on or off use the switch on the front side of the unit.
Receiver unit power supply
The K4 b
2
Receiver Unit is provided with four 1.5 V AA batteries. Before turning the
unit on be sure that batteries are charged. If the status battery indicator blinks red you
must replace the 4 batteries. The unit can be also supplied by 6V DC power through the
cable provided in the equipment.
The receiver unit can be supplied by two different sources:
• by the Battery Charger Unit: connect the units by the 6V DC cable.
• by 4 AA 1,5V batteries.
Calibration Gas Cylinder
In order to calibrate the sensors you need to have available calibration cylinder with the
following gas concentration:
Cylinder Recommended Gas mixture
Calibration O
2
16%, CO
2
5%, N
2
Balance
For the calibration procedure, see the Calibration chapter.
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