Emerson Bristol 2808 Series, Instruction Manual

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Loop Powered Indicator Page 8 Appendix B
from configuration mode to run mode. At any point in the sequence pressing the Mode
button selects the next item in the order i.e., to leave a previously configured item as is,
press Mode to skip over it. When configuration is started a one-minute timer is loaded; it is
reloaded whenever a Mode or Select button is pressed. If no button activity occurs for one
minute the timer will expire and restore the previously active configuration.
Figure 2-6 - Loop Powered Indicator - Mode (SW1) and Select (SW2) Buttons
During configuration any previously configured engineering unit, minus sign, ten-
thousandths digit and decimal point are ignored; the user MUST select them if they are to
be active in the new configuration. Configuration proceeds as follows:
1. Press and hold the Mode (left-hand) button until one of the unit labels begins blinking;
this typically takes 5 seconds. The display will be all blank except for a small lower-
case letter ‘u’ located in the upper half of the rightmost digit. The label of the
previously configured engineering unit will be blinking. Remember that the previous
engineering unit label is only blinking as a convenient starting point - in order to
remain in effect it must be selected again unless another unit will be chosen. If the
previously configured BU was ‘Custom,’ the ‘u’ will be blinking.
2. Press the Mode button to change the displayed blinking engineering-unit label, then
press Select to make the selected unit active and move to minus sign selection. A unit
selection MUST be made otherwise repeated Mode presses will only cycle through the
unit selections. If the integral unit labels do not match the application unit, press the
Mode button until the small letter ‘u’ is blinking. This is the Custom unit selection,
meaning that the display will not show a unit label. In this case an external label
should be used. A Custom unit might be used where the reading will be in feet of water
or millimeters of mercury, or Pascals. Once a unit is selected the display changes.