Scaling
The base value and the factor allow for a further scaling of the corrected
measured value of each measuring channel for zero point and slope (gain).
The decimal point position can be set by the exponent. By setting to zero and
entering the nominal value the scaling values can be automatically calculated.
Limit Values and Alarm
Two limit values (1 Max and 1 Min) can be set for each measuring channel. An
alarm value printout can be performed if a limit value is exceeded and, by
means of relay output modules, alarm contacts are provided that can be
individually allocated to limit values. As a standard, the hysteresis is set to 10
digits, however, it can also be adjusted. Furthermore, limit value exceeding can
also be used to start or stop a data logging.
Sensor Locking
All sensor data stored in the EEPROM of the connector can be protected
against undesired access by means of a graded locking function.
MEASUREMENT
Up to four measuring channels are available for each transducer, i.e. it is also
possible to evaluate double sensors, individually scaled sensors, or sensors
with function channels. The measuring channels can be successively selected
forwards or backwards via keyboard. The selected measuring point can be
scanned with a conversion rate of 2.5 or 10 measurements/second. The
measured value is calculated and indicated on the display or, if available,
provided on the analogue output.
Measured Value
A continuous presentation of measuring data from the selected measuring
point is provided and also includes automatic zero point correction and optional
correction of the measured value or new scaling.
A sensor breakage condition is, with most sensors, automatically detected
(exception: connectors with shunts, dividers or additional electronics).
Measuring Functions
Special measuring functions are required for some sensors in order to achieve
an optimal acquisition of measuring data. The cold junction compensation is
available for thermocouples, a temperature compensation for dynamic
pressure and pH and conductivity probes, and an atmospheric air pressure
compensation for humidity sensors, dynamic pressure sensors and O
2
sensors. With infrared sensors the parameters zero point and slope correction
are used for background temperature and emissivity factor.
6
ALMEMO
2290-2/3
Functions
Summary of Contents for ALMEMO 2290-2/3
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