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Mixed Signal Recorders

Whatever is required should be possible

DEWETRON Mixed Signal Recorders offer portable, battery powered or stationary data acquisition platforms in multiple form factors and performance classes, direct connection to sensors, and powerful and easy to use Software.

Key features:

Any sensor any type (analog, digital, serial, ..)
Multiple rugged and scalable housings
AC, DC or battery power for mobile applications
Extendable with CAN-bus data, ARINC, GPS values, and video from one or more cameras
A_DC with 16, 22 or 24-bit resolution
Powerful filter and trigger functions
All recorded in a synchronized way
Recording for hours, days or weeks

Fastest time to highest quality test and measurement result with DEWESoft

Online monitoring and data analysis
Own set-ups or predefined configurations
Sensor database
Easy traceable single shot or long time recordings
Offline report generation with standardized or individual reports

Visualization

Digital & analog meter	Bar graph	Digital meter	Analog meter
	Different colours for different ranges possible.	Data is represented as actual value, RMS or averaged. Time window for calculation is selectable.	Data is represented as actual value, RMS or averaged.

Graphs

Recorder graph

Vertical recorder

Shows up to 32 channels per screen - the total number of channels can be 1.000 or even more. The data is streamed to the local hard disk at a rate of 160 MB per second (i.e. 80 channel @ 1 MS/s).

The recording time can be minutes, hours or even days and is limited by the hard disk capacity only. Multiple time axes allow to visualize data in great detail but also give a voerview of a hours at the same time.

While continuously streaming data the screen can be switched to FREEZE mode - details of the last seconds can be viewed and analyzed while stroing in the background.

Recorder graph, in vertical "paper recorder style". Additional information of the absolute min and max values of each channel.

FFT Analyzer

Real time FFT

This view is used to display a real time FFT diagram, based and calculated from each channel which is captured. Even a mathematical channel can be used.

Select line resolution, window type and lin or log scaling for both axes. Display modes like averaging, overlapping or weighted. Data is calculated and displayed while storing. All harmonic life peak values can be displayed in a separate table.

Scope mode / trigger

Scope mode

Allows to set FREE RUN, NORM and SINGLE SHOT mode.

Trigger function

Press STORE and then STOP to control recording, or versatile TRIGGER types.

: Simple Edge Trigger

: Window Trigger

: Pulsewidth trigger

: Windows and pulsewidth

: Slope trigger

Multiple trigger

Dependent on the defined trigger conditions data is only stored, when one or more of the conditions are true. By defining pre and post trigger times also data before and after the condition case is captured.

Since no data is stored between trigger conditions the amount of stored data is minimized. In the ANALYZE mode each trigger window can be shown separately. Measurement cursors for absolute values, time or frequency. Pre and post data analysis of events is possible.

Data processing

Math formulas

All major arithmetic, logic, algebra and measure functions can be combined with any measured or calculated channel to create sophisticated formulas.

Statistical calculation
Statistic like average, RMS, QRMS, Minimum, Maximum, Crest, Peak, Peak-Peak, Variance and standard deviation can be calculated in specific time intervals, as a single value or based on events.

Filters

Different types of filters: IIR filters like Chebyshev, Butterworth and Bessel. These filters allow also single and double differentiation and integration.

FIR filters are even smarter. When signals are filtered, filter introduces a phase shift, so the output is delayed compared with input. DEWESoft FIR filter filters data without any phase shift or delay, so it is perfect for analysis of signals which does not allow having phase shifting or delaying.

Reference curve
For comparing the data with predicted curve or with previously measured data DEWESoft offers modules to create time, FFT or x-y based reference curves and use that as a limit criteria.

Exact frequency

This quite smart module can calculate frequency from a sine wave with precision of 1 mHz even if the input sampling rate is not very high.

Alarm output

All the measured and calculated channels can be used as the trigger conditions for digital output. The trigger criteria can be virtually anything: simple edge, filtered edge, window, pulsewidth, slope...

The event can be set to visual component on display, a sound can be played or we can use AD card to output alarm to external digital line.

Storing

Streaming

With a very specific data file structure we can write the channel setup, display setup, all the events, fast analog data and slow asynchronous data from different sources in a single file. For long term measurement DEWESoft offers to switch the file automatically when certain file size is reached or after specified time (e.g. 24 hours). The file switches in that way that no data is lost in between.

Triggered storing

Quite often the system needs to watch the data for several days or weeks, looking only for very specific events. It is not nice to store all the data to the hard drive and then search for that event. Therefore DEWESoft offers very extensive triggering – we can use start and stop triggers and use pre and post time for triggering.

The trigger conditions can be:

Simple edge (either rising or falling slope)
Filtered edge (edge plus rearm level; either slope)
Window trigger (two levels; entering or leaving logic)
Pulsewidth trigger (longer or shorter than duration logic)
Window and Pulsewidth (completely selectable as above)
Slope Trigger (either rising or falling slope with steepness selection)

We can also use math formula to create combined trigger conditions. There is also an option to store fast data on triggers, but store reduced data (min, max, average and RMS values) for the time when triggers are not active. This gives a rough idea of measurement values when triggering was not active.

Database storing

For applications which requires long term storage and off line post processing, DEWESoft offers a database storage where the data is packed and sent to remote database server. The slow speed data is stored all the time and in case of events a full speed data is acquired and stored. Database storage is mainly used for distributed applications.

Please check out our pre-configured standard models for Recorder. Standard models meet approximately 80 % of all application requirements, are cost optimized and shipped faster.

Applications

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