Installation and Operation Manual - COMTEC
®
6000 Software Overview and Explanations
Doc.-ID: COM6000_11022020_EN 27
4.2.5 mA output on system errors (O
2
and CO
e
)
Here the mA output value is set corresponding to a measurement error. The measurement output range for the
shown value (3,60 mA .... 20,40 mA) cannot be defined in this case.
4.2.6 CO
e
Measuring Ranges (Scaling)
The CO
e
Measuring range is linearly scaled and converted to a
linear current output (0/ 4-20 mA).
The parameter „COe Measuring range from“ is the start value of
the CO
e
range, leading to an output of 4,00 mA.
„CO
e
measuring range to" is the end value of the COe range,
leading to an analogue output of 20,00 mA.
If a measured value is lower than the start value of the COe
measuring range, the current output signal drops to 3,60 mA.
(If the current output is set to 0- 20mA the output is 0 mA)
If the measured COe value is higher than the end value of the COe
measuring range end, the analogue output rises to 20,40 mA.
If during normal operation the measured COe
value is under, or
over the programmed measuring range, an error message
appears on the display (in measuring mode).
Figure 23 - COe Measurement Ranges
4.2.7 CO
e
Sensor Calibration values
The COe sensor calibration values are sensor specific. Every CO
e
sensor has a Test Certificate in which the
calibration values offset, alpha, beta, gamma, delta, CO
e
heater resistance (RH
0
) and SO2 Correction Value are
noted. The Test Certificate is attached to the probe or measuring cell on delivery. After a calibration, these values are
updated.
4.2.8 Time per test gas apply
Here the maximum duration of time for the application of test gas or test air is set. If sensor stability is not reached
within the maximum time, the following error message is displayed: "O
2
Sensor calibration failed - O
2
sensor
signal instable" resp." CO
e
Sensor calibration failed - CO
e
sensor signal instable". This problem can be offset
by setting a longer duration. The factory setting for maximal duration is 10 Minutes. If necessary, the time can be
adjusted between 5 minutes and 30 minutes.
4.2.9 Delay time to process
Here the delay time showing the last measured value from the data storage is frozen after test air or test gas has
been applied (only when "Meas. value hold on cal. is set to on) This value also sets the time for showing the trend
representation on the display after test air or test gas application after a sensor calibration is set.
4.2.10 Pre-purge time
The pre-purge time defines the duration of time the sensors flushed with test air / test gas 1 before a 2-point
calibration of the CO
e
or O2+CO
e
sensors. By default, the pre-purge time is switched off.
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