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For an evaluation of the recorded log file, it must be opened with Excel or a similar program.
The content of each column of the log file is named in the first line.
In order to determine the appropriate raw value for a calibration point, the mean value must be determined
from the period of the reference extraction. The mean value can be calculated by Excel with the function
=
AVERAGE ( )
. The calculated mean value of the raw value will be entered in the box next to the raw value
in the configuration software.
In order to transmit the determined parameters to the evaluation unit, the check mark
Overwrite
calibration
must be set .
7.3 Adjusting the measurement values
The system's additional functions can be set in the following menus:
Alarms
Values for flow rate lower or upper limits can be set in
3. Alarm.
A sensor monitoring alarm can also be activated here.
Analogue output
The assignment of the analogue output values takes place in
4. analogue output
.
Upper and lower limit of the permitted current and the fault current are set here.
The analogue output is an active signal. In the field housing version, analogue
outputs 2 + 3 are provided for the MaxxFlow HTC. All other sensors provide their
4 ... 20 mA signal to analogue output 1.
Pulse output
Under
5. Pulse output
there is the possibility of using different impulses.
A cleaning pulse can be used for a pneumatic cleaning on the sensor.
For an external totaliser output there are impulses, which correspond to
a specific conveyed mass. The pulse duration is 50 Hz, a faster query cannot be
guaranteed. An internal totaliser function integrates the mass flow over time.
The pulse output is an open collector and need an active power supply for
pulsing.
Current input
Various input currents can be stored under
6. Current input
. When the current
is applied, the corresponding correction factor is applied to the measured value.
The input current also must be adjusted here.
Digital input
In
7. Digital input,
the system’s digital inputs can be assigned various
functions and their working direction.
System
In
8. System,
functions such as selection of the menu language, the number of
connected sensors and their average, the display screen or ModBus addressing
and speed are summarised.
Totaliser
The entire flow volume since the last totaliser reset can be read with the totaliser
function. A reset can be performed via an external control cable or directly via the
display by pressing the R symbol.
