1. FAULT – When selected the system will declare the Reflexor channel to be in Fault and
the flowmeter will
indicate "F" on the display screen. Note that when a new Reflexor channel
is created the [Fault] option is the default mode. Also note that the sum (or difference)
channel will also be declared to be in Fault.
2. ZERO – When selected the Reflexor channel will be declared to be at Zero Flow instead
of in Fault and the flowmeter will indicate 0.00 on the display screen.
7.5 Setting Relays
Relay Functions
Use the [Relay Setup] menu to assign a function to channel relays. The flowmeter supports
two types of relay outputs, Alarm Relay and Pulse Relay. Alarm Relay outputs operate in "fail-
safe" mode. The relay(s) are energized under normal conditions - an alarm condition causes
the relay(s) to de-energize until the alarm clears. The Pulse Relay output supports Totalizer
and batch relay functions, with an output pulse width of approximately 200 ms; maximum
activation rate is 2.5 pulses per sec. If Totalizer pulses exceed this rate, excess pulses are
stored in an overflow register. This allows the relay to "catch up" when flow decreases enough.
Note
Using the <F1> key (Totalizer clear command) also clears all channel Totalizers plus the
overflow register described in the last paragraph.
Relay 1 and 2 Function Assignments
The
flowmeter,
depending
upon the model, provides at least two alarm relays. Please refer to
the Appendix (Page 137) for wiring details. Relays respond to any of the alarm conditions or
data functions included on the Relay Option List.
Table 7-4 Relay Option List
Not Used Not Active
Power Off Power Off alarm occurs when power fails.
High Temp High temperature value relay trip-point.
Low Temp Low temperature value relay trip-point.
High Flow System flow rate exceeds high flow set point.
Low Flow System flow rate falls below low flow set point.
Flow Alarm System flow rate exceeds or falls below flow set points.
Fault Alarm System loses receive signal (all paths in fault).
Soft Fault Fault condition - memory mode active.
Spacing System sensor spacing needs adjusting.
Empty Empty pipe alarm.
Aeration Aeration percentage exceeds alarm set point.
Reverse Flow Flow is in negative direction.
Functions
7.5 Setting Relays
FUP1010 IP67 Portable Flowmeter
84
Operating Instructions, 02/2010, A5E02951522A Revision 01
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