Rockwell Automation 441-PEN25 Enpac Ex Data Collector - Manual (Page 57)

Publication GMSI00-UM001A-EN-E - February 2005
Setting Up Measurements 51
Numeric (Process) Measurement Definitions
Emonitor and the Enpac Ex support numeric measurement definitions. This
topic lists the unique characteristics of the Enpac Ex that you may need to
know when setting up and collecting numeric data.
Measurements units not supported in the Enpac Ex
• You can make a numeric measurement definition for any available
measurement unit by setting Data Type to "Numeric."
• Numeric measurement definitions with Input type set to "DC
Coupled" with units not supported by the Enpac Ex map to units of
USER (eus). The input type is part of the transducer specification that
you select for the collection specification. This results in a process (DC)
voltage measurement in the Enpac Ex.
• Numeric measurement definitions with Input type set to "Manual
Entry" not supported by the Enpac Ex map to USER (s) in the data
collector. These measurements require you to enter the value with the
Enpac Ex numeric key pad.
• For a list of support measurement units, see Measurement Units on
page 39.
Full scale values for numeric measurements in the Enpac Ex
• The full scale value in the Enpac Ex for a numeric measurement is
defined as ten times the value of the alarm or the baseline measurement.
• If no alarm or baseline measurement exists for the measurement in the
data collector, the Enpac Ex assumes a full scale value of 10,000.
• A full scale value of 10,000 can be a problem if you want to enter a very
large or very small value for the numeric measurement. For example,
you can not enter a value greater than the full scale value. If you enter a
value that is very small compared to the full scale, the Enpac Ex may
round the value off. If you enter 0.01 with a full scale value of 10,000,
the Enpac Ex stores it as a 0 (zero).
2nd Order 1.8 Orders 2.2 Orders None
3rd Order 2.8 Orders 3.2 Orders None
4th Order 3.8 Orders 4.2 Orders None
Table 3.10 Filter specifications in mag & phase measurement definitions
Name Low Cutoff High Cutoff Data collector filter type