3: Operating Procedures
U3000/U4000 User Manual
27
(Issue 2.0)
3.4.3 Alarm
outputs
Both the U3000 and U4000 models contain two programmable alarm outputs that are interfaced by opto-
isolated relays. The relay contacts are rated at a 48V (maximum voltage across the open contacts) and
500mA (maximum continuous current through the closed contacts).
The two alarm outputs can be individually configured to operate in one of four modes:
•
Activate at a predefined Low or High flow rate.
•
Activate when a specified Volume is measured.
•
Activate if a signal error is detected – either due to poor signal strength or complete signal loss.
•
Alarm Test mode.
•
Pulse Frequency output.
Alarm settings selection
1.
To access the The
ALARM SETTINGS
menu select
Alarm Settings
from the
FLOW READING OPTION
menu and press
ENTER
.
2.
The
ALARM SETTINGS
screen should be
displayed, as shown below.
This screen shows two parameters (
Mode
and
Limit
) that can be individually set for
Alarm 1 and Alarm 2.
Alarm configuration
1.
To setup Alarm 1 select
Alarm1 Mode
and
press
ENTER
. This will access the
ALARM1
MODE
menu screen (shown below).
2.
Scroll down the menu to the required alarm
operating mode and press
ENTER
to select.
FLOW READING OPTION
DD-MM-YY HH:MM:SS
Data review
Zero Cutoff (m/s) : 0.010
Set zero flow (m/s) : 0.000
Damping (secs) : 10
Totaliser : Run
Reset +Total
Reset –Total
Calibration factor : 1.000
Roughness factor : 0.010
Alarm Settings :
Max Pulse Freq (Hz) : 10.00
Flow at Max Frequency : 200.00
Calculated Pulse Value: 2.00
Diagnostics
Exit
ALARM SETTINGS
DD-MM-YY HH:MM:SS
Alarm1 Mode
Alarm1 Level : <value>
Alarm2 Mode
Alarm2 Level : <value>
Exit
Alarm1 ON Alarm2 ON
ALARM1 MODE
DD-MM-YY HH:MM:SS
Off
Low
High
Volume
On Flow Error
Alarm Test
Frequency
