LB 134
Design and Mode of Operation of the LB134
2
on and off via a button. In the graphics mode, the measured
values can be represented as a function of time, in the rateme-
ter mode, you always see the graph of the last 120 seconds. A
separate jumper allows you to lock certain parameters optional-
ly through the hardware, for example, background values or cal-
ibration factors in dose rate probes. The parameters are per-
manently stored in a memory chip powered by a long-life Li cell.
The device includes a USB interface to a host and a device
connector to allow communication with a PC or to connect a
memory stick. Two other functions can be operated via a sepa-
rate 6-pin Fischer connector: An external low-voltage relay can
be connected, which is enabled when an alarm in the first or
second measuring channel is exceeded. This can be used in
the event of an alarm, for example, to operate a signal lamp.
Furthermore, an RS485 interface is available, allowing integra-
tion of the device into a local network. Up to 32 measuring de-
vices, including central computer, can be integrated in this net-
work with a cable length of up to 1000 m. The baud rate to be
set depends on the cable length and the number of connected
devices. The standard cable used is a shielded twisted pair da-
ta cable which has to be terminated at each end of the bus with
120 ohms.
The F²C protocol, which is also implemented in some other BT
devices, is used for serial data communication via RS485 and
USB interface. All parameters can be up- and downloaded with
this protocol. Many more features regarding measurement op-
tions are available. The device is fully remote controllable. Us-
ing a service program, a new program can be transferred via
USB interface to the device. A PC control program allows re-
mote control and data transmission with archiving and many
graphics options and parameter upload and download. The
measurement data memory can also be transferred to the PC.
With the USB memory stick, the measurement data memory
can be transmitted and the parameters can be uploaded and
downloaded.
The device is optimally protected against environmental influ-
ences such as moisture, dust and temperature.
Summary of Contents for LB 134
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Page 6: ...LB 134 Content IV...
Page 8: ...LB 134 Working with the User s Manual VI...
Page 10: ...LB 134 Safety Instructions VIII...
Page 34: ...LB 134 2 System Description 24 Figure 2 9 LB 134 with wall bracket...
