Limit Values and Alarm
Two limit values (Max and 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 measurement.
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
The standard equipment includes one measuring circuit board with 9
electrically isolated inputs. The number of inputs can be increased in steps of
10 to a maximum of 89 by adding up to 8 (at max.) selector switch boards. A
maximum of 4 measuring channels is available for each input, i.e. it is also
possible to evaluate double sensors, sensors with different scaling or sensors
with function channels. The measuring channels can be successively selected
forwards or backwards or by their number 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).
Analogue Output and Scaling
By means of analogue start and analogue end the indicated meas. value can
be scaled so that the resulting meas. range covers the full analogue output
range (2V, 10V or 20mA).
Measuring Functions
Some sensors require special meas. functions to achieve an optimal
acquisition of meas. 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.
Maximum and Minimum Value
Each measurement involves an acquisition and storing of the maximum and
minimum value. These values can be displayed, printed or cleared.
ALMEMO
®
5590-2
6
Functions
Summary of Contents for Almemo 5590-2 V5
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