Zeromatic (Optional Function) - Siemens SITRANS FUH1010PVDX Operating Instructions Manual

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)

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 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.
REYNOLDS TABLE
to scroll to the [Zero Flow Adjust] menu cell.
Siemens Dual Path
Conformans Indicated flow to Actual Zero
Transducer Model
Transducer Size
Xdcr Mount Mode
Spacing Offset
Number Index
Spacing Method
Ltn Value (in)
Install Complete?
Empty Pipe Set
Zero Flow Adjust
Pick/Install Xdcr
5-34
SITE1
1011 Universal
B3
Reflect
Minimum Flow
7
Track 1012TP
ReversaMatic
ZeroMatic
Auto Zero
Actual Zero
ZeroClr
CQO:1010PVXFM-3