Siemens SITRANS Probe LU Operating Instructions Manual page 47

Flow breakpoints
Each segment defined by the head breakpoints (P054) requires a corresponding flow
value, so that SITRANS Probe LU can make the head-to-flow calculations.
Primary Index
Secondary Index
Values
Related Parameters
Use the Flow Tables associated with your open channel device (Parshall flume, v-notch
weir, or other measuring device) to calculate the flow rate for each head breakpoint.
Enter a flow value for each breakpoint defined in P054. (See illustrated example for Head
Breakpoints on page 39.)
1. P050 must be set to 9.
2. Select P055.
3. The empty breakpoint value field appears, with the breakpoint number in the
auxiliary reading field.
4. Press DISPLAY
reading field goes blank).
5. Key in 1 and press ENTER
6. Key in the flow value for breakpoint 1, and press ENTER
7. Press the UP ARROW key
8. Key in the flow value for breakpoint 2, and press ENTER
9. Repeat steps 7 and 8 until flow values have been entered for all the required
breakpoints.
10. Press DISPLAY
desired parameter.
1.
For more details on secondary index operation, see page 30.
A5E32337695 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS
P055
Breakpoint number
Range
Default
P054 Head Breakpoints
twice to focus control on the secondary index
.
to display 02 in the auxiliary reading.
twice and use the ARROW keys or enter the value for the next
0.0000 to 99999 in units
0.0000
1
(the auxiliary
.
.
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