DL7, DL7L
76
[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. For the
CJC ⁰C or CJC ⁰F channel, the characteristic is typically set as 1:1. Calibration is
possible by entering a User characteristic that takes into account temperature changes
in individual temperature ranges or a Linear characteristic that increases or decreases
the measured temperature by a fixed number of degrees. The same unit for the
measured temperature and the temperature of the cold junction must be set.
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.
