Page 40 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS A5E32337695
Parameters
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.
Typical volume calculations:
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 twice to focus control on the secondary index
1
(the auxiliary
reading field goes blank).
5. Key in 1 and press ENTER .
6. Key in the volume for breakpoint 1, and press ENTER . (Any volumetric units can
be used: see note to P051.)
7. Press the UP ARROW key to display 02 in the auxiliary reading.
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 twice and use the ARROW keys or enter the value for the next
desired parameter.
Primary Index
P055
Breakpoint number
Secondary Index
Values
Range 0.0000 to 99999 in units
Default 0.0000
Related Parameters
P054 Level Breakpoints
1.
For more details on secondary index operation, see page 30.
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