DEWESOFT SIRIUS Series User Manual

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SIRIUS
® 
TECHNICAL REFERENCE MANUAL 
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Sampling and digital filter 
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Example 
Legend for illustration “Sampling and digital filter”, from left to right: 
● f
f
: Filter frequency: e.g. 800 Hz 
● f
n
: Nyquist frequency: e.g. 1 kHz 
● f
f2
: f
s
-f
f
= 1.2 kHz 
● f
s
: Sampling frequency: e.g. 2 kHz 
Sampled Signal: Since we have a sampling frequency of 2 kHz all signals over 1 kHz are folded back to                    
the Nyquist band (due to aliasing) when they are sampled by the AD converter (dashed lines in                 
Illustration “Sampling and Digital Filter”). Thus the Sampled Signal will already contain the wrong signal               
components. 
The digital filter will now attenuate all frequencies of the Sampled Signal (which already contains the                
aliased signals) that are higher than 800 Hz. 
SIRIUS
®
V20-1 274 / 336  

DEWESOFT SIRIUS Series Specifications

General

Category	Data Loggers
Manufacturer	DEWESOFT
Series	SIRIUS
Resolution	24-bit
Interface	USB, EtherCAT
Software	DEWESoft X
Channels	Expandable
Sampling Rate	Up to 200 kS/s per channel
Input Types	Voltage, Current, IEPE, Strain, Thermocouple, RTD, Resistance, Digital, Counter
Input Voltage Range	±10 V, ±200 V
Isolation	Channel-to-channel and channel-to-ground
Connectivity	Ethernet, USB
Operating Temperature	-10 °C to +50 °C
Storage Temperature	-20 °C to +70 °C
Power Supply	10 to 30 V DC
Dimensions	Varies depending on module configuration
Weight	Varies depending on module configuration
Analog Inputs	Yes, depending on module configuration