CiDRA SONARtrac PW VF-100 - Manual (Page 157)

20834-01 Rev 04 Page 8-13
The following is an example of Pulse settings applied to Flow Rate:
Pulse Output: Flow Rate
(Default setting, based on 8” schedule 40 pipe)
Min Flow: 513.575 gal/m
Max Flow: 5135.751 gal/m
Pulse Output: Flow Rate
Multiplier: 100
Pulse Width: 1 ms
Low cutoff: 0% or 513.5 gal/m (no cutoff)
Min Pulses: 5.136 Pulses per second
Max Pulses: 51.357 Pulses per second
In the above example, the Pulse output frequency indicates the flow
rate in gallons per minute, divided by 100. The output will therefore
vary between 5.136 and 51.357 PPS (Hz), based on the Flow Rate
reading.
The following is an example of Pulse settings applied to Total Flow:
Output: Total Flow
Flow Rate: 400 gal/min
Pulse Output: Totalizer
Multiplier: 10
Pulse Width: 1 ms
Low cutoff: 0% or 270.1 gal/m (no cutoff)
In the above example, Pulse output would be 400 gpm / 10 = 40
pulses per minute.
The following is an example of Pulse settings applied to Gas Volume
Fraction:
Pulse Output: GVF
Multiplier: 1
Pulse Width: 1ms
Low cutoff: 0.000%
Min Pulses: 0 Pulses per second
Max Pulses: 100 Pulses per second
In the above example, the Pulse output frequency will vary between 0
and 100PPS (Hz), corresponding to 0 to 100% GVF.
8.3.3 Alarm Control
The Alarm Control menu is used to activate the ‘Warning’ and
‘Critical’ alarm functions. Once turned ‘On’ it is used to select the
parameters that will activate the alarm.
8.3.3.1 Warning
Warning indicates an alarm condition has entered a range of
condition(s) where the integrity of readings may be suspect. This is
indicated by the transmitter red LED and alarm output relay blinking
on and off.