DL2
63
[4]: The characteristic is typically set to "Linear". Also available are other setting options
), depending on the module type. For example, for
the RTD module there are characteristics of the individual sensor types available.
12.4.2 General
Fig. 12.5 An example
view of the ‘Channel’ settings window – ‘General’ tab.
Unit: [None]
(text)
[1]
Time base:
- [ /s, /m, /h]
[2]
Resolution: 0
(0, 0.0, 0.00, 0.000, 0.0000)
[3]
Filter: Disabled
(Disabled, 2s, 5s, 10s, 20s, 30s, 1min, 2min, 3min, 5min)
[4]
Archiving: Disabled
(Disabled, Enabled)
[5]
Failure value: Disabled
(Disabled, Constant [value])
[6]
Trend scale:
Trend min.: [Value]
[7]
Trend max.: [Value]
[7]
[1]: The unit is provided for information purposes only. User can put in any text string
which does not affect the calculated or measured results displayed by the device.
[2]: The
Time base
is crucial only for flow measurements and totalizers calculation. In
spite of
Unit
set above, it determines calculations for totalizes and flows according to
/s
(per second),
/m
(per minute) or
/h
(per hour) setting.
[3]: The resolution defines the number of decimal places in the displayed result. It is
unreasonable to set too high resolution for the measurement, because accuracy will
not be improved (e.g. Pt100 sensor measurement set to three places after the
decimal point will not provide for measurement accuracy of up to 0.001°C). However,
if a filter is activated with sufficiently high time constant and if the resolution is
reasonably increased, the changes can be identified more clearly.
[4]:
The filter function “smoothes out” sudden surges in the measured values or
eliminates signal noise. If the filter time constant is too high, the measurement value
fluctuations can be falsified by "smoothing out" the ascending and descending
slopes, or by eliminating short pulses. The filter time constant should be customized
to the maximum speed of changes in the measured process.
[5]: It enables on / off the archiving of the results to a file in internal archive memory.
Summary of Contents for DL2
Page 47: ...DL2 47 Notes ...
Page 48: ...DL2 48 Notes ...
