37 • Recorder Output Board Beacon 800 Gas Monitor Operator’s Manual
6. Start up the Beacon 800 as described in “Chapter 3: Installation and Start Up” on
page 9. When the Beacon 800 start up is complete, the recorder output board will be
generating the analog output signals for all active channels.
Operation
The output of the board for a channel directly mirrors the signal from the detector head
installed on that channel at all times regardless of whether the Beacon 800 is in normal
operation or in the configuration menu. 4 mA and 1 V correspond to a gas concentration of
0; 20 mA and 5 V correspond to a full scale reading. In the case of an oxygen channel, a
normal concentration of oxygen, 20.9%, corresponds to 17.38 mA and 4.34 V. The output
at terminals for any inactive or uninstalled channels is 0 mA and 0 V.
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