Scaling
The corrected measured value on each measuring channel can also be further
scaled in terms of zero point and slope (gain) - using the base value and factor.
The decimal point position can be set with the exponent.
Limit values and alarm
Per measuring channel two limit values can be set (1 maximum and 1 mini-
mum). In the event of either one of these limit values being overshot, an alarm
arrow appears in the display.
Sensor locking
All sensor data stored in the connector EEPROM can be protected, by means
of a graduated locking function, against undesired access.
MEASUREMENT
For each transducer up to four measuring channels are available; i.e. it is also
possible to evaluate double sensors, individually scaled sensors, and sensors
with function channels. The selected measuring point is scanned at a conver-
sion rate of 2.5 measuring operations per second; the measured value is
calculated and output to the display and, if available, to an analog output.
Measured value
The measured value for the selected measuring point is shown continuously
with auto zero and, as and when necessary, with measured value correction.
With most sensors, sensor breakage is detected automatically (except for con-
nectors with shunt, divider, or additional electronics).
Measuring functions
With some sensors, to achieve optimal data acquisition, special measuring
functions are required. Cold junction compensation is available for thermocou-
ples; temperature compensation is available for dynamic pressure, pH, and
conductivity probes. With infrared sensors the parameters for zero point and
slope correction are used as the background temperature and emissivity fac-
tor.
Analog output and scaling
The displayed measured value can, by means of analog start and analog end,
be scaled in such a way that the associated measuring range covers the full
analog output range (2 V, 10 V, or 20 mA).
Data memory
At the touch of a button the measured value can be frozen in the display.
Maximum and minimum values
For each measuring operation the maximum value and minimum value are
acquired and saved. These values can be scanned and, as and when
necessary, deleted.
6
ALMEMO
2390-3
Introduction