Siemens SITRANS Probe LU Operating Instructions Manual page 46

P055 Volume or Flow Breakpoints
If you are measuring level and volume, follow the Volume Breakpoints instructions below.
If you are measuring head and flow, follow the Flow Breakpoints instructions on page 41.
Volume breakpoints
Each segment defined by the level breakpoints (P054) requires a corresponding volume,
so that SITRANS Probe LU can make the level-to-volume calculations.
Primary Index
Secondary Index
Values
Related Parameters
Typical volume calculations:
Cone
V = (1/3)πr
Enter a volume for each breakpoint defined in P054. (See illustrated example for P054 on
the previous page.)
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 volume for breakpoint 1, and press ENTER
be used: see note to P051.)
7. Press the UP ARROW key
8. Key in the volume for breakpoint 2, and press ENTER
9. Repeat steps 7 and 8 until volume 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.
Page 40 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS
P055
Breakpoint number
Range
Default
P054 Level Breakpoints
2
h
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
Cylinder
V = πr
1
(the auxiliary
. (Any volumetric units can
.
2
h
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