12
Checking this will enable a range of flow to be entered.
When the flow is outside/inside of this range the alarm will be
triggered.
The remaining settings in the input box are the same as for
Single Flow alarms.
• When no Latching is chosen the alarm will automatically
reset in proportion to the user set Hysteresis.
• The Latched Alarm can be reset by a signal Input on one
of the other Input/Output PINS, or by Pressing and Holding
the Right Hand Button on the Local Display on the Flow
meter for 3 seconds.
• The INVERT checkbox will reverse the action of the alarm
output. (see the Alarm Logic Table).
DUAL FLOW ALARM:
If
INPUT
is selected either the Reset Total or Reset Alarm can be operated remotely by
using a switch and resistor to apply a suitable voltage (between 5 and 24 Vdc) to either
Pin 6 or Pin 7 as described on page 13.
This option allows the user to send a signal from the assigned
wire/PIN when reverse flow is seen.
Selecting INVERT will reverse the action of the signal.
REVERSE FLOW:
ALARM LOGIC TABLE
Flow
Latching Invert
Alarm Action
Alarm
Below Threshold Above Threshold
Single
None
Unticked
OFF
ON
Single
None
Ticked
ON
OFF
Single
High Threshold
Unticked
OFF
ON
Single
High Threshold
Ticked
ON
OFF
Single
Low Threshold
Unticked
ON
OFF
Single
Low Threshold
Ticked
OFF
ON
In Range
Outside Range
Dual
None
Unticked
OFF ON
Dual
None
Ticked
ON OFF
Dual
Out of Range
Unticked
OFF
ON
Dual
Out of Range
Ticked
ON
OFF
Forward Flow
Reverse Flow
Reverse Flow
n/a
Unticked
OFF
ON
Reverse Flow
n/a
Ticked
ON
OFF
