Ahlborn ALMEMO 2690-8A, Руководство по эксплуатации

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11. Programming With Programming-Menus
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A new feature is the presence of four device-internal channels:
M5 is
programmed by default as differential channel M1-M0; this applies if there are
two sensors with the same units and same decimal point position connected at
measuring points M0 and M1. However, all four channels can be used in con-
junction with any function channels with standard reference channels Mb1=M1
and Mb2=M0 assigned; i.e. if you want to program a function parameter with-
out reference channel on a device-internal basis, the sensor must be con-
nected to M1.
Advantage of device-internal channels:
If several sensors are being used for the same application, they do not have to
be reprogrammed and can be freely exchanged without losing their function
channel assignment. However, if the whole application operates with just one
sensor, then programming on the sensor itself makes more sense.
11.3.11
Special meas. ranges, linearization, cali-
bration
Thanks to the new ALMEMO special connectors with extra memory for addi-
tional data (larger EEPROM, code E4) the following tasks can now for the first
time be elegantly performed :
1. Provision of special measuring ranges with internal characteristic (s. 10.3.9)
2. Linearization of signals for voltage, current, resistance, or frequency
set by the user
3. Multi-point calibration of all sensors
The ALMEMO 2890-9 can as standard evaluate all appropriately programmed
connectors. With the special KL variant it is also possible to convert measuring
signals into appropriate display values in line with a characteristic of up to 30
support values. These support points are programmed to the EEPROM in the
ALMEMO connector using the ALMEMO ® Control software. During a measuring
operation the measured values are interpolated between these on a linear basis.
When correcting non-linear sensors (e.g. with Pt100 or thermocouple sensors)
initially the original characteristics are considered; then only the deviations are
interpolated on a linear basis and inserted.