Emerson 3051S Spezifikationen Seite 82

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56
Reference Manual
00809-0100-4803, Rev DA
Section 3: Configuration
April 2013
Configuration
Note
If the totalizer rate is configured as the primary variable and is being output via the 4-20 mA
signal, verify the 4-20 mA range (LRV and URV) after completing the custom unit configuration.
For more information on verifying the 4-20 mA range, see “Basic device configuration” on
page 31.
Follow these steps to configure a custom unit:
a. Custom Unit: Enter the desired custom unit label to be displayed for the Totalized
Reading. Up to five characters including letters, numbers, and symbols can be entered
in the custom unit field.
Note
It is recommended that the Custom Unit be entered in upper case letters. If lower case letters
are entered, the LCD will display upper case letters. Additionally, the following special
characters are recognized by the LCD Display: hyphens (“-”), percent symbols (“%”), asterisks
(“*”), forward slashes (“/”) and spaces. Any other character entered for the Custom Unit will be
displayed as an asterisk (“*”) on the LCD Display. The following warning will be returned
indicating these changes: “Custom Unit contains characters that will display in upper case or
asterisks on LCD. The DCS will display as entered.
b. Base Unit: From the drop-down menu, select a base unit to be used for the custom unit
relationship.
c. Base per Custom: Enter a numeric value that represents the number of base units per
one custom unit. The 3051S MultiVariable transmitter uses the following convention:
Base per Custom =
Example:
Custom Unit: kg
Base Unit: g
Because 1 kg (Kilogram) = 1000 g (Grams)
Base per Custom = = = 1000
The values of Base per Custom for common totalizer units are shown in Ta bl e 3 -1 1.
d. Click Apply.
e. Totalizer Unit: From the drop-down menu, select the custom unit that was created in
Step b.
Note
The custom unit may not be available as a selection in the Totalizer Unit drop-down menu until
the drop-down menu is refreshed. To refresh the drop-down menu, navigate to the Basic Setup
tab and then return to the Variables - Totalizer tab.
Number of Base Units
1xCustomxUnit
-----------------------------------------------------------------------
Number of Base Units
1xCustomxUnit
-----------------------------------------------------------------------
1000 g
1kg
---------------------
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