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1010PVNFM-3A
Section 2
R = Flow Rate Alarm (High or Low rate threshold exceeded)
F = Fault Alarm
A = Aeration Alarm
M = Memory Activated (Fault Suppressed)
K = Makeup Flag (May be Latched)
I = Interface Alarm
P = Pig Alarm (option)
AnCal
Flow Rate Simulator for calibrating external devices, etc. Highlight
this item then press the <Right Arrow> to enable numeric entry. Type
desired simulated flow rate. Be aware of the units prefix (K, M, etc.).
NOTE: AnCal remains active only while you remain in this menu
cell.
HiFlow
Most positive expected flow rate for application (adjustable).
GAL/MIN
LoFlow
Most negative expected flow rate for application (adjustable).
GAL/MIN
FLOW DATA MENU ITEMS
(continued)
Vs m/s
This menu cell shows the current sonic velocity in m/s. If you move the cursor to this menu cell
you will note that it switches from the usual arrow (
à
) to a question mark (?). This indicates
that you can increase the reading by pressing the [+] key for coarse adjustment or the [1] key
for fine adjustment; or reduce the reading by pressing the [-] key for coarse adjustment or the
[2] key for fine adjustment. Sonic velocity (Vs) adjustment is a diagnostic tool intended for our
technicians or experienced users only. Improper use will affect the meter accuracy.
HiFlow and LoFlow
The HiFlow and LoFlow menu cells allow you to enter maximum and minimum expected flow
rates based on current operating conditions. Under normal circumstances, you should never
need to change these settings. It is possible however, that a Controlotron customer service
engineer may ask you to edit these settings during a support session. In such a case, a <Right
Arrow> at the menu cell enables numeric entry.
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.
AnCal
This menu cell allows you to enter an artificial flow rate in current rate units that will
drive the meter’s analog outputs, totalizer output and the screen shown below. You can use
