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Installation and Operation Manual – AQUATEC 1000
Software Overview and Explanations
Doc.-ID: AQUA_16012020_EN
23
4.2
Software Explanations - SYS-MENU
4.2.1
O
2
Measuring Ranges (Scaling)
Figure 22 -
O
2
Measuring Ranges
The O
2
Measuring range
is linearly scaled and converted to a
linear current output (0/ 4-20 mA).
The parameter „O
2
Measuring range from“
is the start value of the
O
2
range, leading to an analogue output of 4,00 mA.
„O
2
measuring range to“
is the end value of the O
2
range, leading
to an output of 20,00 mA.
If a measured value is lower than the start value of the O
2
measuring
range, the current output signal drops to 3,60 mA.
(If the current output is set to 0- 20 mA the output is 0 mA)
If the measured O
2
value is higher than the end value of the O
2
measuring range end, the analogue output rises to 20,40 mA.
If during normal operation the measured O
2
value is under,
or over
the programmed measuring range, an error message appears on
the display (in measuring mode).
4.2.2
Measuring value averaging for
This entry sets the duration for the continuous average measurement (flowing average). During a calibration or
sensor verification, the measurement average is not shown, though still active for the analogue output.
4.2.3
mA output on system errors
The mA output value for a system error is specified in range of 0 - 3,55 mA or 20,41 to 20,80 mA. The mA output
value for a system error cannot be set in the mA measuring range.
4.2.4
O
2
limit alarm settings
Figure 23 -
O
2
limit alarm settings
The entry "by" sets the value at which the O
2
limit alarm is activated.
The O
2
limit alarm function "min"
defines a value by which the
limit alarm
is activated if the measured O
2
value falls below the
set limit.
If the hysteresis is set to greater than 0,00,
the limit alarm is reset when the measured O
2
value rises above the
set O
2
limit plus the hysteresis value
.
The O
2
limit alarm function "max"
defines a value by which the
limit alarm
is activated if the measured O
2
value rises above the
limit.
If the hysteresis is set to greater than 0,00,
the limit alarm is reset when the measured O
2
value falls below the
O
2
limit minus the hysteresis value.
If the hysteresis is set to 0,00 % O
2
, the triggered limit alarm must be
manually reset.