Ahlborn ALMEMO 2290-2/3, Руководство по эксплуатации

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Difference
The ALMEMO 2290-3 provides two differential measuring channels for both
electrically isolated measuring inputs. If such a channel is selected, the
measured values of both sensors are continuously determined and the
difference is indicated and, if available, provided to an analogue output.
Analogue Output and Scaling
By means of analogue start and analogue end the indicated measured value
can be scaled so that the resulting measuring range covers the full analogue
output range (2V, 10V or 20mA).
Memory for Momentary Values
The measured value can be frozen by the push of a button (hold function).
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.
Average Value of a Channel
A manual averaging over a particular period or over single measurements is
available for the selected channel.
Volume Flow Measurement
Apart from the averaging functions, all flow probes provide functions for
entering the cross section area or diameter of air vents and calculating the
volume flow. The average flow velocity can be roughly determined by
measuring the whole cross section area or by accurate net measurements
according to DIN. For dynamic pressure probes a temperature and an
atmospheric pressure compensation is available. With corresponding
environmental conditions these values can be entered manually or
automatically measured.
PROCESS FLOW PROGRAMMING
A cyclic measuring point scan with a time-based process flow control is
required to register the measuring data of all connected sensors. For this
purpose, the real time clock, the print cycle and the measuring cycle are
available and, if fast processing is required, the conversion rate is available.
The measurement can be started and stopped by using the keyboard,
interface, external trigger signal, real time clock or an exceeding of limit values.
Time and Date
The real time clock with date function or the pure measuring time are used for
an accurate recording of any measurement.
Print Cycle
The print cycle is programmable between 1s and 59h/59min/59s and provides
a cyclic output of measured values to the interfaces or memories and also
provides a cyclic averaging.
ALMEMO
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2290-2/3 7
Functions