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Reference Manual
IP2048/RM, Rev AA
Section 4: Starting up
February 2015
4.2.3 Selecting the units of measurement
Screen display: unitS
Factory default setting: m (metric) or ft (Imperial)
The transmitter is pre-programmed with selectable measurement units for each of the duties:
1. Distance and Level measurement: m, ft, or in
2. Flow measurement: l/s, l/m, m
3
/hr, gal/m, m ga, ft
3
/m (cfm), or ft3/hr
3. Contents measurement: l, m3, gal, or ft3
Note
The factory default units of measurement are dictated by the model part number
(see ordering information tables in Product Data Sheet IP2045).
A Metric unit can be re-configured to be an Imperial unit, or vice-versa, by changing the
base units (b.unit) of the transmitter. See “Changing the base units” on page 60.
Changing base units after programming the transmitter will cause all
programmable data to be overwritten with factory default values.
The unitS menu option is in the programming menu. See Figure C-1 on page 76 for a
map of the menu structure and how to access all the menu options.
To change the measurement units
1. If entering the menu system from the PV display, press the green button repeatedly
until the “unitS” menu option is indicated (see note above.)
2. Press the blue button
to enter the “unitS” menu. (The presently selected units are
indicated on the bottom display line.)
3. If the units are correct, press the red button
and then the green button to exit to the
next menu option.
4. Press the blue button
to start the editing mode. The present units flash to indicate it
may be edited.
5. Press the green button
repeatedly to scroll through the list of units.
6. Press the blue button
to confirm the new units. The flashing stops.
7. If the new units are correct, press the red button
to save and get to the next menu.
8. If the new units are incorrect, press the blue button
to exit to the menu. The menu
option “unitS” re-appears; re-start at step (2) or press
to get to the next menu.
Note
When using the green button to scroll through the measurement units, allow three
seconds after each button press for the transmitter to check and display the selection.
After changing units, a scaling factor (see “K-factor for the flow law” on page 32) needs
to be edited to see the correct PV.