SEFRAM DAS220 Operation & User’s Manual

The acquisition on each valid channel is done every millisecond, For each channel one can choose a sampling period variable from 1 ms to 100 ms ( for Pt100 and Pt1000 3 wires : the period is variable from 2ms to 200ms.) This period of integration can eliminate noise for high frequency Example : main noise at 50Hz or engine noise at 1kHz. For white noise or noise with lower frequency ( lower than recording frequency ) you can choose a software Butterworth filter Example : Recording 9 Channels : Sampling Period Ch1 Ch2 Ch3 Ch4 Ch5 Ch6 Ch7 Ch8 Ch9 50ms 50ms ...

T2 = 10% Amplitude Tfall = T2 – T1 Width of positive impulsion Measurement of the time of 1st positive pulse. It is measured at 50% of amplitude Width of negative impulsion Measurement of the time of 1st negative pulse. It is measured at 50% of amplitude Positive cyclic ratio period positive pulse duration Negative cyclic ratio period negative pulse duration Average     N i iV N Aver 1 1 N : total number of dots Calculation on the whole graphic range RMS      N i iV N RMS 1 2 1 Calculation on the whole graphic range Standard ...

This key has various effects according to the way you use it. Launching the data acquisition into a file and position of the appliance in a stand-by mode, waiting for the trigger condition Start. In any case, you can force the triggering and stop without fulfillment of the conditions inside the recorder by pressing (to force the record) and (to force the stop). The following shows up on the screen:  current sampling speed  status of data acquisition (waiting for trigger, sampling rate xx%, …) 4.15. Screen copy You can create a file copying the conten ...

Connect the recorder to your network with a straight-through cable onto the 10/100 BASE-T (RJ45) connector at the rear of the appliance. You can use the recorder on an Ethernet network 10 Mbit/s or 100Mbit/s. In case of a network with BNC cable, you must use an external hub to convert the BNC signal into RJ45 signal (use a straight-through cable). If your PC has no network, you can also use a crossover cable directly between the PC and the recorder. Crossover ...

The XY mode is accessible via the main menu by pressing the XY key. The XY display mode allows visualizing the validated channels on the screen and in real time, relative to each other. One of the channel defines the excursion on the horizontal axis, the other channels give points on the vertical axis. 1- Screen configuration: Setting the measurement display on screen.  Choice of the mode of graphical visualization :  F(t)  XY  Numerical of measurement (full screen)  Full screen to visualize the reticule on full screen (f(t) mode.  Color to custo ...

key. For longer data acquisition times, you can zoom onto a part of the data or change of page. Keys of the « Display » menu:  Total: the complete memory is displayed and update during the acquisition  Partial: only a part of the memory is displayed; the screen is frozen; only the bargraph and the filling rate allow you to know the status of data acquisition; you have access to the time cursors and zooms (see the next chapter). ...