User manual

The module also can be operated in a stand-alone mode (without being

supplied from the USB-connector at a deactivated PC). In this case however,

the BS-510 must be connected to an external power supply (5 up to 7.5 Volts,

minimal 500mA, e.g. a universal mains power adapter).

The module signals its status by one green and one orange LED. The

green LED will shortly ash as soon as the BS-510 receives a message from

a sensor. The orange LED will be activated as soon as data is recorded in the

internal data-ash memory, which also indicates a disconnected PC.

The orange indicator will be switched o as soon as the PC-connection has

been reactivated.

Radio

Sensor data will be received at the 433MHz (ISM band) radio band. The

module has been equipped with an internal antenna for reception of the radio

signals. In order to enable an undisturbed and reliable radio transmission the

module must be installed at an optimal location by excluding deteriorating

conditions such as:

– metallic walls,

– armed concrete, (building) concrete with steel bars, mesh, etc.,

– armed glass, e.g. with a metallic mesh or grid

– other equipment operating in the range of a 433MHz radio-band

Radio interference may also cause a display of unknown sensors. Unexpected

sensor data may be suppressed by activating the sensor lter option in the

software.

USB

USB-implementations may vary from PC to PC, which mostly seems to cause

some problems at connecting and disconnecting (respectively switching on

and switching o) the computer. Sometimes even the disconnected PC will

still provide the USB-connector with the standard amount of specied DC-

power. Under such conditions the BS-510 will operate without the need for an

external power supply. In other cases, in which the USB-connector does not

provide DC-power, an external power supply will be needed to allow the BS-

510 to collect measurement data during the oine-periods of the PC.