4-46
1010GCNFM-3C
Section 4
To enter an Interface Vs or SG alarm setpoint:
1. Press the <Right Arrow> to activate numeric entry.
2. Use the numeric keys to type the Interface value (meters/sec for Vs or SG).
3. Press <ENT> to store the data.
Turbulence %
The ability of FUG1010GCN to operate with substantial gas non-homogeneity (possibly caused by water
vapor mixing) surpasses all other transit-time systems. Some applications may require an alarm indica-
tion if turbulence exceeds a particular level. Therefore, the meter detects the turbulence level and pro-
vides this data as an output. The turbulence percentage triggers the alarm relay whenever it meets or
exceeds the threshold you set in this menu cell. The turbulence percentage (Vtrb %) appears in the Flow
Data section of the Diagnostic Data Menu. In addition, the digital display screen shows the current turbu-
lence percentage.
NOTE: Severely non-homogeneity may induce flowmeter fault. The 50% default usually allows
enough leeway for continued operation. For intermittent faults, see memory interval in
the Output Control menu.
To set the Turbulence % Alarm:
1. Press the <Right Arrow> to move the cursor to activate numeric entry.
2. Use the numeric keys to type the Turbulence percentage setpoint.
3. Press <ENT> to store data.
Makeup Latch
A fault condition could interrupt system operation temporarily. After recovery from the fault, the meter
executes an in-process makeup to restore operating parameters. During the In-Process Makeup, the
meter sets a Makeup Alarm flag, which it 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 an In-Process Makeup by holding the Makeup Alarm active
until you reset it manually by the simultaneous keystrokes: <Fn>6 (where “n” represents the measure-
ment 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:
1. Press the <Right Arrow> to access the [Makeup Latch] option list.
2. Move the cursor to select either [On or Off].
3. Press <ENT> to turn Makeup Latch [On] or [Off].
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