Grundfos Conex DIA-2 Installation And Operating Instructions Manual page 43

1. Select the line "alarm" in "main menu" using the
[Up] and [Down] buttons.
2. Press [OK] to switch to the "alarm" menu.
Two functions are available there:
alarm
alarm values
dos. time monit.
• alarm values: If the measured value exceeds the
permitted range, the alarm relay is activated and
an alarm message is triggered. The red alarm
LED starts flashing.
• dos. time monit.: If the dosing flow constantly
remains at 100 % during a selected maximum
dosing time, the alarm relay is activated and an
alarm message is triggered. The red alarm LED
starts flashing.
Setting the alarm values
1. Select the line "alarm values" using the [Up] and
[Down] buttons. Press [OK] to switch to the
"alarm on/alarm off" submenu.
2. Confirm the line "alarm on" using [OK], and select
the "alarm values" selection menu.
Setting the upper and lower switching point
(limits)
1. Select the line "alarm value 1" or "alarm value 2".
Press [OK] to confirm and switch to the desired
menu.
alarm value 1
0.00 mg/l
switching point1
2. Set switching points between 0 and the upper
limit of the measuring range defined earlier using
the [Up] and [Down] buttons (in the unit of the
measured value, the resolution depends on the
selected measuring value and measuring range).
See section 8.4 Measuring
3. Press [OK] to switch to the "eff. direction" menu.
Options: alarm message in the event of upward/
downward violation of the selected switching point.
4. Select the desired line using the [Up] and [Down]
buttons.
5. Press [OK] to return to the "alarm values" menu
automatically.
ranges.
6. Select the line "hysteresis" in the "alarm values"
menu, and press [OK] to switch to the
corresponding submenu.
alarm values
0.00 mg/l
hysteresis
7. Set the hysteresis to a value between 0 and half
of the measuring range using the [Up] and
[Down] buttons.
The hysteresis ensures that the relays switch less
frequently in the event of upward or downward
violation of the limits.
8. Press [OK] to return to the "alarm values" menu.
9. Select the line "alarm delay" in the "alarm values"
menu, and press [OK] in the corresponding
submenu.
alarm values
0 sec
alarm delay
10. Set the alarm delay to a value between 0 and 300
seconds using the [Up] and [Down] buttons.
11.7.1 Dosing time monitoring
This function can be used to monitor the dosing
process. If the dosing flow remains at a constant
level of 100 % during a selected period, an alarm
message is triggered.
dos. time monit.
10 min
max. dosing time
1. Select the line "dos. time monit." in the "alarm"
menu, and press [OK] to switch to the
corresponding submenu.
In the "dos. time monit." menu, the monitoring
function can be switched on or off.
• If "off" has been selected, the device returns to
the "alarm" menu.
• If "on" has been selected, the "dos. time
monit." submenu is displayed.
2. Set the maximum dosing time to a value between
0 and 600 minutes using the [Up] and [Down]
buttons.
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