1.5.3 The “MODE” Pushbutton
The “MODE” pushbutton on the control panel can be used to program the model 1100. This
momentary push-button soft key is used to navigate the operational modes available through the
control panel. Its function is menu-driven.
1.5.4 7-Segment Alphanumeric Display
The 7-Segment alphanumeric display feeds back information from the model 1100 to the user.
The primary purpose of the 7-Segment display is to show the oxygen concentration readout. It is
also used for feedback of operational status, fault codes, and other information necessary to
perform system setup and maintenance.
1.5.5 RUN Indicator LED
The purpose of the RUN Indicator LED on the control panel is to inform the user that the model
1100 is measuring the concentration of the sample gas and updating the display and outputs
accordingly, and has not detected any alarm, or fault conditions.
1.5.6 Alarm-1 Indicator LED
The purpose of the Alarm-1 Indicator LED on the control panel is to inform the user that the
measured oxygen concentration has exceeded the alarm-1 threshold; alarm-1 and its associated
relay are in active mode.
1.5.7 Alarm-2 Indicator LED
The purpose of the Alarm-2 Indicator LED on the control panel is to inform the user that the
measured oxygen concentration has exceeded the Alarm-2 threshold; alarm-2 and its associated
relay are in active mode.
1.5.8 Fault Indicator LED
The purpose of the Fault Indicator LED on the control panel is to inform the user that at least one
system fault is active. Note that when the fault Indicator LED is active, the fault relay will also be
active.
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