Comet U0110, User Manual

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IE-LGR-Uxxxx-16
33
Channels _______________________________________
In this panel you can set all input channels. The assignment
of the measurement value and its range to a channel is factory-set
and cannot be changed.
Depending on the device type, up to three calculated channels are
available (for details see
Annex 5 ).
Supply a suitable name of the location to be measured (or calculated
value) for each channel and decide whether it will be switched on for
measurement and for recording.
Further items, like those for entering the decimal place number,
the name of the physical unit and the conversion of the measurement
values by means of the so-called
User calibration are available
in channels with voltage and current inputs only. In these inputs
no physical quantity unit is
displayed on the device’s LCD display.
If the value cannot be displayed on the device's display for a large
number of digits, then Hi (if greater than the displayable number) or Lo
(if less than the displayable number) is displayed. However, this error
message only concerns the display on the device display,
not the measurement and recording.
An example of user-defined calibration for a sensor having a 4 to
20
mA current output. The sensor is connected to the datalogger’s
current input; the sensor’s measurement range is -30 to +80 °C:
Lower point A: Input value: 4 will be shown as -30
Upper point B: Input value: 20 will be shown as 80
In a channel for external Pt 1000 probes there exists the possibility to
enter the probe parameters to correct the measurement error caused
by probe cable length.
In binary channels you can decide whether a voltage signal or a contact
(an open-collector transistor) will be connected to the input. Then enter
textual descriptions of the states for both input levels. In this way
the states will be displayed in the record and in the Online display.
At the same time, from the menu, choose symbols for displaying these
states by the device.
For a counter channel, decide whether to report an error or continue
from zero after it is overflowed. . The range is 24 bits, it means max.
16 777 215.
In the next step, set alarm states for each measured variable. You can
set up to 2 alarms for each measured quantity (alarm 1 and alarm
2 buttons). Each alarm must be enabled (on/off) first.
Furthermore, choose whether the alarm should arise from exceeding
the limit value or from dropping under it (
value is greater than / value is