Siemens SITRANS FUH1010PVDX, Руководство по эксплуатации, Страница: 154 / 308

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CQO:1010PVXFM-3 Section 5
To set the Aeration % Alarm:
To move the cursor to activate numeric entry press
Use the numeric keys to type the Aeration percentage setpoint.
To store data press
Makeup Latch
A fault condition (caused by an empty pipe or a transient loss of power, etc.) could temporarily interrupt
operation. After recovery from the fault, the meter executes an in-process makeup to restore operating
parameters. During the makeup, the meter sets a Makeup Alarm flag, which clears upon completion.
Therefore, unless you were monitoring the unit continuously, you could miss the fact that an In-process
Makeup occurred. The Makeup Alarm Latch alerts you that the system implemented a Makeup by hold-
ing the Makeup Alarm active until you reset it manually by the simultaneous keystrokes: <Fn>6 (where
“n” represents the measurement channel). In addition, if the Datalogger is active with Status Alarms
selected, generating a Datalogger report will reset the Makeup Alarm Latch. This ensures that the Alarm
does not appear on succeeding Datalogger reports. A Makeup Alarm appearing on a subsequent report
indicates that an In-Process Makeup must have occurred since the last Datalogger report.
To enable or disable the Makeup Latch:
To access the [Makeup Latch] option list press
Move the cursor to select either [On or Off] by pressing
To turn Makeup Latch [On] or [Off] press
5.7.3 CALIBRATE FLOWRATE AND CALIBRATION TABLES
FUH1010PVX equipment provides three ways to condition the calibration performance of its flowrate
output: Intrinsic (factory set), Kc, and Calibration Tables 1 through 3. Access to these calibration options
is found in the [Calibrate Flowrate] menu cell and the three [Calib. Table] menu cells of the Data Span/
Set/Cal menu (refer to Data Span/Set/Cal menu on next page).
The FUH1010PVX intrinsic calibration is excellent as confirmed by numerous laboratory and
field trials under diverse application conditions. Siemens can confidently say that in any given
application, the majority of conventional flowmeters can not match the system’s measure-
ment range or its linearity.
ENT
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Aeration %
The FUH1010PVX surpasses all other transit-time systems in its ability to operate with substantial aera-
tion (caused by entrained gases, mixing condition or cavitation). Some applications may require an
alarm indication if aeration exceeds a particular level. The meter detects this aeration level and provides
this data as an output. The aeration percentage triggers the alarm relay whenever it meets or exceeds
the threshold you set in this menu cell. The aeration percentage (Vaer %) appears in the [Liquid Data]
menu cell of the Diagnostic Data Menu. The digital display screen also shows the current aeration per-
centage.
NOTE: Severely aerated conditions may induce meter fault. The 50% default usually allows
enough leeway for continued operation. For intermittent faults, see memory interval in
the Output Control menu.