TS103 User Guide Page 6

Frequency Selection

The tilt meter signal conditioning units can be supplied to operate on 434, 869.9 and 914.65 MHz licence free bands. The working frequency for the modules has to be determined at time of order as it is factory set. For each dedicated channel on the specified frequency band Keynes Controls can support directly up to 127 instruments.

Channel Selection

The transmitter with the tilt meter signal conditioning unit can transmit on 10 frequency bands within the 433 MHz band and 2 frequencies within the 870MHz licence free band. The channel selection for the transmitter is stored within non-volatile EEPROM and can be User set.

To set the channel to be used first set the DIP switches to indicate the desired channel. The channel selection is set by a binary number representing the channel to be used on DIP switches DIP1-DIP4. The switches should be set as follows:

Next press and hold button S2 for around 2 seconds until the level indicator LED’s go out. After the LED’s stop illuminating release the button immediately and the new channel will be set.

Note. Do not continue to hold the button after the LED’s go out.

Sensor Signal Selection

The module can be configured to transmit 1 or 2 tilt sensor channels with or without a temperature compensation signal. The temperature reading is the ratio of the built in thermistor to that of a reference resistor. The Beta value of the thermistor is indicated on the calibration sheet and is 3620 unless otherwise specified.