
Software Overview and Explanations
Installation and Operation Manual - COMTEC
®
6000
26
Doc.-ID: COM6000_11022020_EN
4.2
Software Explanations - SYS-MENU
4.2.1
O
2
Measuring Ranges (Scaling)
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 output of 4,00 mA.
„O
2
measuring range to“
is the end value of the O
2
range, lead-
ing 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- 20mA the output in this case 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 ap-
pears on the display (in measuring mode).
Figure 21 -
O
2
Measuring Ranges
4.2.2
Limit alarm settings
The entry "by" sets the value at which the limit alarm is activated.
The limit alarm function "min"
defines a value by which the
limit alarm
is activated if the measured value falls below the
limit.
If the hysteresis is set to greater than 0,00,
the limit alarm is reset when the measured value rises above the
limit plus the hysteresis value
.
The limit alarm function "max"
defines a value by which the
limit alarm
is activated if the measured value rises above the
limit.
If the hysteresis is set to greater than 0,00,
the limit alarm is reset when the measured value falls below the
limit minus the hysteresis value
.
If the hysteresis is set to 0, the triggered limit alarm must be man-
ually switched off.
Figure 22 -
Limit alarm settings
4.2.3
O
2
Sensor calibration values
Info
The sensor calibration values can be altered through a 1 or 2 point calibration. Manual entry of values is
only necessary after replacing the O
2
sensor. (The sensor calibration values, "cell constant" and "cell
slope" can be found on the probe test protocol for new probes.)
4.2.4
Measuring value averaging for (O
2
/ CO
e
)
This entry sets the duration for the continuous average measurement (flowing average). During a calibration or
sensor verification, the measurement average is switched off