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User Interface
Item
O
alarm
2
O
extra
2
Low temperature
High temperature
ALARM OUTPUTS
4.5.11
An overview is given below of the alarm outputs and the corresponding activation conditions.
See Section 3.6.5 for an overview of the physical I/O connections.
General Alarm (A1):
All faults.
All error messages.
Temperature alarms for sensor 1 and/or sensor 2.
O
alarms for sensor 1 and/or sensor 2.
2
Digital output A1 (Normally Close, NC) is zero if there has been an alarm during two
measurements. The alarm can be reset by selecting 'ACK/RESET ALARM' in the Shortcut
menu. The digital output is then high (and remains high during the alarm signal).
O
Alarm (A2):
2
If the O
value of sensor 1 and/or sensor 2 is greater than the set value, then output A2 is
2
zero. N.B. output 1 is also zero in the case of an O
These outputs can be reset by selecting 'ACK/RESET ALARM' in the Shortcut menu and
will then remain high (if the alarm signal continues).
O
Extra (Alarm) for Sensor 1(A3):
2
If the O
value of sensor 1 is greater than this value, then output A3 is zero.
2
For example, in the case of filtration, if the value is greater than the O
(O
extra), then output A3 cuts out. As a result, the process of the sensor 1 circuit can be
2
stopped. Or, for example, if the value is less than the O
output A3 is activated. As a result, the aeration of the sensor 1 circuit can be started.
O
Extra (Alarm) for Sensor 2 (A4):
2
If the O
value of sensor 2 is greater than this value, then output A4 is zero.
2
The same conditions apply here as for the O
29
Table 4.3: Configurable Alarm Settings.
Range
Default
0 .... 45,000
100
0 .... 45,000
200
- 10 ... 150
20
- 10 ... 150
20
Unit
ppb; ppm; mg/l; ug/l; % as; %
ppb; ppm; mg/l; ug/l; % as; %
° C; ° F
° C; ° F
alarm.
2
low alarm value (O
2
extra alarm for sensor 1.
2
9065 Luminescent Dissolved Oxygen Analyzer
alarm high-high value
2
extra), then
2
Waltron User Manual
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