Siemens SITRANS FUH1010PVDX, Operating Instructions Manual, Page: 136 / 308

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CQO:1010PVXFM-3 Section 5
This completes the ReversaMatic procedure. The system’s zero accuracy will be very close to that obtain-
able using the Actual Zero method, providing flow remained constant during this procedure.
Important Note: A caution on the use of upper and lower flow limits (used to prevent flow mis-
registration) prior to using the Reversal Zero technique (ReversaMatic): If the negative flow rate
that the meter reads in the step during which the transducers are reversed is more negative than
the lower flow limit, the meter will re-register positive and the Reversal Zero cycle will thus be
corrupted.
Therefore, postpone the installation of upper and lower flow limits until the reversal zero proce-
dure is executed successfully. For pipes that combine large diameters with very high flow veloci-
ties, it may be necessary to move the upper and lower flow limits out of the way until the reversal
zero is completed. Moreover, pipes of this size frequently have excellent intrinsic zero perfor-
mance and may not even need zeroing.
ZeroMatic (optional function) REYNOLDS TABLE
NOTE: ZeroMatic is used in the Reflect Mode only.
Use this menu cell to select the ZeroMatic option. If conditions permit the use of the Auto Zero function
then the ZeroMatic option can be used as well. ZeroMatic is similar to Auto Zero, but differs in that its
averaging function is continuously updated and virtually eliminates zero drift.
To select and enable the ZeroMatic option:
In the Pick/Install Xdcr menu, press to scroll to the [Zero Flow Adjust] menu cell.
To access the [Zero Flow Adjust] option list press
NOTE: If ZeroMatic is not running, the [Actual Zero] menu item will be displayed next to the
[Zero Flow Adjust] menu cell.
Siemens Dual Path SITE1
Transducer Model 1011 Universal
Transducer Size B3
Xdcr Mount Mode Reflect
Spacing Offset Minimum Flow
Number Index 7
Spacing Method Track 1012TP
Ltn Value (in) ReversaMatic
Install Complete? ZeroMatic
Empty Pipe Set Auto Zero
Zero Flow Adjust Actual Zero
ZeroClr
Conformans Indicated flow to Actual Zero
Pick/Install Xdcr