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44
Reference Manual
00809-0100-4840, Rev CB
February 2015
4.4.7
Setting the scaling factor (on the 3102/3105)
Screen display:
SCALE
Default:
1.000
Note
If a flow duty has been selected, the value entered into this parameter is in effect the
K-factor in a flow law of the form Flow Q = kh*
If a Distance, Level or Contents (Volume) duty has been selected, the value entered into this
parameter is a factor used to scale the measured distance, level, or volume.
For a Level or Distance duty, the scaling factor is normally left at the value calculated by the
transmitter (depending upon previously entered data and duty selected), or the default value of
1.000.
For a linear Contents duty, enter a scaling factor to convert the level measurement to a contents
(volume) measurement. If the measurement units are “m”, enter the volume contained in 1 m
of liquid height in the tank. If the units of measurements are “ft”, then enter the volume
contained in 1 ft. of liquid height in the tank.
To change the scale factor
1.
If entering the menu system from the PV display, press the green button
repeatedly
until the “SCALE” menu option is indicated (see below note).
2.
Press the blue button
to enter the “SCALE” menu and to display the present scale
factor.
3.
If the scale factor is correct, press the red button
and then the green button
to get
to the next menu option. Otherwise, continue with step (
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 (
) 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 “SCALE” menu or
the next menu appears.
Note
If the existing data entered allows the transmitter to calculate the maximum flow, the
4 mA and 20 mA points are automatically set to 4 mA at zero flow and 20 mA at maximum flow.
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