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SIRIUS

® 

TECHNICAL REFERENCE MANUAL 



5.11. LV / LV+ 



The LV modules are perfect for low voltage and current measurements in combination with current 

clamps. 

5.11.1. LVv2: Speciﬁcations 

Inputs 

Input types 

Voltage 

Full bridge strain 

Current (ext. Shunt) 

ADC Type 

24-bit delta-sigma dual core with anti-aliasing ﬁlter 

Sampling Rate 

Simultaneous 200 kS/sec 

Dual Core Ranges (Low 

Range) 

±200 V (10 V) 

±10 V (500 mV) 

±1 V (50 mV) 

±100 mV (5 mV) 

Gain accuracy 

±0.05 % of reading 

Offset accuracy (Dual 

Core) 

±40 (20) mV 

±2 (1) mV 

±0.2 (0.2) mV 

±0.1 (0.1) mV 

Offset accuracy after 

Balance Ampliﬁer 

2 mV 

0.1 mV 

0.02 mV 

0.01 mV 

Typ. Dynamic Range @ 

10 kS (Dual Core) 

-136 dB (-146 dB) 

-137 dB (-152 dB) 

-137 dB (-147 dB) 

-130 dB (-132 dB) 

Typ. Noise ﬂoor @ 10 kS 

(Dual Core) 

-109 dB (-118 dB) 

-109 dB (-126 dB) 

-109 dB (-116 dB) 

-97 dB (-97 dB) 

Typ. CMR @ 50 Hz / 400 

Hz / 1 kHz / 10 kHz 

70 / 70 / 60 / 55 dB 

95 / 95 / 89 / 84 dB 

105 / 105 / 100 / 95 dB 

115 / 112 / 107 / 102 dB 

Gain Drift 

Typical 10 ppm/K, max. 30 ppm/K 

Offset Drift 

Typical 0.3 μV/K + 5 ppm of range/K, max: 2 μV/k + 10 ppm of range/K 

Gain Linearity 

<0.02 % 

Inter Channel 

Phase-mismatch 

0.02° * ﬁn [kHz] + 0.1° (@ 200 kS/sec and 10 V range) 

Channel Crosstalk 

-120 dB @ 10 kHz (range ≤10 V); -95 dB @ 10 kHz (range = 100 V) 

Input Coupling (see 1) 

DC, AC 1 Hz (3 Hz, 10 Hz per SW) 

Input Impedance 

200 V Range: 1 MΩ; all other ranges 10 MΩ between IN+ or In- against GND 

Max. common mode 

voltage 

Isolated version ±500 V 

Differential version: 200 V range: ±200 V; all other Ranges: ±12 V 

Input Overvoltage 

Protection 

200 V Range: 300 V; all other ranges: 100 V (250 V peak for 10 msec) 

Excitation Voltage 

Excitation voltage 

Unipolar or Bipolar Software selectable (programmable with 16-bit DAC) 

Excitation Level unipolar 

0…24 Volt; Predeﬁned levels: 1, 2.5, 5, 10, 12, 15 and 24 VDC 

Excitation Level bipolar 

2…30 Volt; Predeﬁned levels: 2.5, 5, 10, 12, 15, 24 and 30 VDC 

Accuracy 

±0.1 % ±5 mV 

Drift 

±50 ppm/K ±100 μV/K 

Stability 

10 % to 90 % load (bipolar) <0.01 % 

Current limit 

200 mA (2 Watt max. per channel, 12 Watt max. per Slice) 

Protection 

Continuous short to ground 

SIRIUS

V20-1 158 / 336  

Brand	DEWESOFT
Model	SIRIUS-SBOXe
Category	Data Loggers
Language	English

DEWESOFT SIRIUS-SBOXe User Manual

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