
Front Panel Controls and Indicators
Chapter Three: Overview
26
Channel Select/Remote/Auto Switch
PDR-C-2C only
If this switch is set in either the “1” or “2” position, the chosen channel’s pressure value will be
displayed (unless the READ switch is used).
If this switch is set to the “AUTO” position, then the display will monitor channel 2 at high
pressures (it is assumed that channel 2 is connected to a sensor having higher range) until the
pressure reading of channel 1’s sensor falls to 90% of its full scale value. The display will continue
to monitor channel 1 until channel 1’s pressure reaches 100% of full scale of its pressure gauge, at
which time it will automatically switch to monitoring channel 2.
If set for the “REMOTE” position, then an external 5 Volt logic line may be used to select either
channel 1 or 2 to be displayed. If a high signal is sent to this line, or if left unconnected, channel
1 will be selected. A low signal voltage will select channel 2.
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