10. CONSUMER SETTING OF OFFSET ON ANALOG CHANNELS
In this mode, users can freely enter a programmable value, which will always be added to
the measurement ("offset"). This is used when there's a discrepancy between the value
displayed by the device and measured with another reference instrument.
To authorize the user offset of the readings of both channels, it is necessary to power on
the device while the
DOWN
button is pressed.
In this case, values are added (subtracted when with minus sign) to channel readings.
Assigning each separate offset is done the way, as is setting the setpoint
SP
of each
channel in normal work mode.
Caution – the device does not display previously made changes!
Changing with extreme caution can lead to incorrect operation of the unit!
Offset mode is available only until the next shut down.
11.
RECOMMENDATION AGAINST EMI
(Electromagnetic Interference)
•
Recommendations for use of connecting wires
-
Wires that carry a similar type of signals can be packed together, but if the signals
are different, the wires must be separated to prevent electromagnetic interaction.
- When there have to be crossed wires with different signal types this must be done at
an angle of 90 degrees and a long distance.
- Wires, which carry weak signals and wires connecting the sensors to the controller
must not be near contactors, motors, generators, radios and wires, which carry large currents.
•
Noise suppression using the built-in in the controller filter
- If the input parameter fluctuates and is not stable it is necessary to reduce the filter
coefficient
Fr 1 or Fr2.
As lower the value, the heavier the filter and slowly change the input
parameter.
- If the process variable on the display jumps periodically for short intervals, it is
necessary to increase the parameter
tJ 1 ot tJ2
. When increasing this parameter, the device
reacts slower at an unexpected “jump’’ in the input, but ignores the short-term interference.
Редакция документ 2018-11-02
14
Содержание MS8111PWM3S
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