CiDRA SONARtrac HD GVF-100 - Manual (Page 87)

Copyright © 2006 CiDRA Corporation Page 10-9
20675-02 Rev 01
The following is an example of Pulse settings applied to Flow Rate:
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: 1 ms
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), based on the actual GVF reading.
•
Alarm
The transmitter alarm is a tri-state output. The Alarm modes are ‘Off’
(no alarm conditions present) indicated by the transmitter mounted
LED off and no signal being sent to the DCS, ‘Warning’ (an alarm
condition has entered a range of condition(s) where the integrity of
readings may be suspect) indicated by the transmitter mounted LED
and alarm output relay blinking, and ‘Critical’ (an alarm condition in
which the output of the meter can no longer be considered valid)
indicated by the alarm LED on the transmitter being constantly on and
constant relay closure output to the DCS. The measurement result