6 display option button, 7 trace scale button, 8 trace tag and atom – Micromod Micro-PWC: 53PW6000 MicroPWC Operators Manual User Manual
Page 75: 9 value at arrow, 1 value precision indicator
Micro-PWC OPERATOR’S MANUAL
Trend Displays 61
6.1.6 Display Option Button
The Display Option button is the second of the three buttons associated with each trace. The Display
Option button allows you to select the option which determines the form in which data is to be presented
for that trace on the Trend Graph. These options include MINimum, MAXimum, AVeraGe, and INSTanta-
neous.
If MIN, MAX or AVG is selected, the data collected during the collection interval will be used to calculate
the value plotted on theTrend Graph. If INSTantaneous is selected, the actual value of the data at the time
of collection will be used to plot the value on the Trend Graph.
Click on the Display Option button to move through the choices. The face of the button will reflect the
current choice in effect.
6.1.7 Trace Scale Button
The Trace Scale button is the third button in the set of three associated with each trace. The face of this
button indicates the color in which the trace is displayed. Click this button to change the Scale Bar Limits of
the Trend Graph to reflect the specific High and Low limits for the associated individual trace. The new
Scale Bar Limits will be displayed in the same color as the trace with which they are associated. To restore
the original Scale Bar Limits, click Trace Scale a second time, or click Reset (see
).
6.1.8 Trace Tag and Atom
The tagname and atom of the Historical Database point which is being trended appear to the right of the
Trace Scale button.
6.1.9 Value at Arrow
To the right of the trace tag and atom is a value which represents the Value at Arrow. This is the value of
the Historical Database point trended by this trace at the time indicated by the location of the Trend
Readout arrow.
6.1.9.1 Value Precision Indicator
Due to differences in collection rates, it is possible that no point was collected on the precise point in time
indicated by the Trend Readout arrow. In this case, the value displayed is an interpolated value. The value
actually shown may have been collected slightly before or after the point in time indicated by the Trend
Readout arrow. The Value Precision Indicator is a one-character field which follows the Value at Arrow.
The character displayed here provides information regarding the precision of the value:
x
Indicates a precise, actual value is displayed.
<
Indicates that the time-stamp of the value displayed is actually prior to (older
than) that indicated on the Time at Arrow button (see
); or the Micro-PWC is unable to interpolate the
value.
>
Indicates that the time-stamp of the value displayed is actually after (newer
than) that indicated on the Time at Arrow button (see
).
i
Indicates an interpolated value, calculated using the closest values before
and after that indicated on the Time at Arrow button.