Ahlborn ALMEMO 2450-1L, Руководство по эксплуатации, Страница: 10 / 24

5. Introduction
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for any extra settings.
Units
The 2-character units display can be adapted for each measuring channel so
that both the display and via interface always indicate the correct units, e.g.
when a transmitter is connected. Conversion between °C (Centigrade) and °F
(Fahrenheit) is performed automatically.
Measured value designation
Each sensor is identified by means of a 10-character alphanumeric name. This
name is entered via the interface and will appear via interface and in the soft-
ware.
Correction of measured values
The measured value on each measuring channel can be corrected both in terms
of zero-point and gain; this means that even sensors usually requiring initial ad-
justment (e.g. expansion, force) can be freely interchanged. Sensors with multi-
point calibration can also be connected; (see Manual Section 6.3.13).
Scaling
The corrected measured value on each measuring channel can also be further
scaled in terms of zero-point and gain - using the base value and factor. The dec-
imal point position can be set by means of the exponent function.
Sensor locking
All sensor data stored in the connector EEPROM can be protected by means of
a graduated locking function against undesired access.
5.1.2
Measuring operations
A total of up to 4 measuring channels are available for 1 transducer; i.e. it is also
possible to evaluate double sensors, individually scaled sensors, and sensors
with function channels. You can move forwards or backwards from one meas-
uring channel to the next using the keypad. The selected measuring point is by
default assigned preferred status and is scanned at half the measuring rate; all
other active channels are also scanned but in the background (semi-continuous
mode). The data is output on the display.
Measured values
The measured value for the selected measuring point is shown continuously
with autozero and, as and when necessary, with measured value correction.
With most sensors, sensor breakage is detected automatically (except for con-
nectors with shunt, dividers, or additional electronics).
Measuring functions
With some sensors, to achieve optimal measured value acquisition, certain spe-
cial measuring functions are required. These include e.g. cold junction compen-
sation for thermocouples and temperature and atmospheric pressure compen-
sation for certain humidity variables.
Maximum and minimum values
For each measuring operation the maximum value and minimum value are ac-
quired and saved to memory. These values can then be displayed, output, or
deleted from memory.