Output Mode - Omega RD8800 User Manual

Chapter 5 Programming

5.6.5.12 Output mode

The Output mode option allows the user to program a point to display the Time Period Average or Rate of
Change.
To program the Output mode:
From the Point Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Output mode and press the
ENTER button. The Output mode Setup menu will be displayed with five choices: Normal (Time Period
Average) and Rate of chg/sec, Rate of chg/min, Rate of chg/hr or Rate of chg/day (Rate of Change-
ROC). These options are mutually exclusive, and the highlighted option is the one that is active. The
options are described in the following sections.
5.6.5.12.1 Time Period Average (Normal)
Using Time Period Averaging the Recorder is set up to acquire input data and display the values of the
average over a selectable time period (0-3600 seconds). For a time period window of less than or equal
to 60 seconds, data points are averaged over 1 second periods. The averages of the short 1 second
periods for the selected time periode are then averaged to get a composite average. The recording and
display are then updated every 1 second.
For time periods greater than 60 seconds, data points are averaged over a proportionately greater
period than 1 second. These averages are then averaged as a composite average. When the maximum
setting of 3600 seconds (1 hour) is used, the recording and display update rate is 1 minute.
To set up a point to Time Period Average:
From the Output mode Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to select Normal and press
the ENTER button. You will be prompted with "seconds XXXX ". Use the numeric keypad to enter a
Time Period value and press the ENTER button to return to the Output mode Setup menu. If the Time
Period is set to 0, live data readings are recorded without averages.
NOTE: Changing between Point Types or to a Point Type that does not support the Time Period
Average function resets any previous setting back to the default state.
5.6.5.12.2 Rate of Change (ROC)
The Rate of Change function takes the difference between the current input value and the last Time
Period Averaged point or the last real value (if the time period is set to 0). The difference is then scaled
to per second, minute, hour or day depending on menu selection. This gives a ∆Value / ∆time plot.
To set up a point to display the Rate of Change (ROC):
From the Output mode Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to select Rate of chg/sec,
Rate of chg/min, Rate of chg/hr, or Rate of chg/day depending on the scaling preference and
press the ENTER button. Use the numeric keypad to enter a Time Period value and press the ENTER
button to return to the Output mode Setup menu. If the Time Period is set to anything other than 0,
the Rate of Change (ROC) will be based on the Time Period Averaged point. If the Time Period is set
to 0, the Rate of Change (ROC) will be based on the last real value.
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