Emerson Rosemount 3101, Reference Manual

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43
Reference Manual
00809-0100-4840, Rev CB
Section 4: Starting up
February 2015
Starting up
4.4.6 Power factor for the flow law (on the 3102/3105)
Screen display: P.FACt
Default: 1.000
This menu option only appears if a flow duty has been selected and a profile (e.g. “SPEC.C”)
requires the manual editing of a power factor in the formula:
Flow Q = kh* (where * = the power factor)
The transmitter is pre-programmed with appropriate power factors for many standard flow
profiles, and will automatically select the appropriate factor (See
Table 4-1 on page 42 ).
Alternatively, the power factor may be edited to suit a specific flow structure.
To change the power factor
1. If entering the menu system from the PV display, press the green button

repeatedly
until the “P.FACt” menu option is indicated (see the above note).
2. Press the blue button

to enter the “P.FACt” menu and display the present power
factor.
3. If the power factor is correct, press the red button

and then the green button

to get
to the next menu option. Otherwise, continue with step ( 4 ).
4. Press the blue button

to start the editing mode. The first digit flashes to indicate it
can now be edited.
5. Press the green button

repeatedly to edit the flashing digit.
6. Press the blue button

to move to the next digit. The digit flashes to indicate it can be
edited.
7. Repeat steps ( 5 ) and ( 6 ) until the last digit is flashing, and edited as required.
8. Press the blue button

to confirm the new value. (The flashing stops).
9. Press the red button

to save if the new value is correct, or press the blue button

to
not save. Afterwards, depending on the button pressed, either the “P.FACt” menu or
the next menu appears.