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SIRIUS

® 

TECHNICAL REFERENCE MANUAL 



5.8. ACC / ACC+ 



The ACC modules are perfect for sound and vibration IEPE channels. 

5.8.1. ACCv2: Speciﬁcations 

Inputs 

Input types 

Voltage 

IEPE 

ADC Type 

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

Sampling Rate 

Simultaneous 200 kS/sec 

Ranges (Dual Core Low Range) 

±10 V (±500 mV) 

±500 mV (NA) 

Input Accuracy (Dual Core) 

±0.1 % of reading ±10 (1) mV 

±0.1 % of reading ±1 (NA) mV 

Dynamic Range @ 10 kS (Dual Core) 

-140 dB (-160 dB) 

-135 dB (NA) 

Typ. Noise ﬂoor @ 50 kS (Dual Core) 

-107 dB (-125 dB) 

-100 dB (NA) 

Typ. CMR @ 50 Hz / 1 kHz 

140 / 120 dB 

Gain Drift 

Typical 10 ppm/K, max. 30 ppm/K 

Offset Drift 

Typical 0.5 μV/K + 2 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) 

Channel Crosstalk 

<-160 dB @ 1 kHz 

Input Coupling 

DC, AC 0.1 Hz,1 Hz 

Input Impedance 

1 MΩ (270 kΩ for AC coupling ≥1 Hz) in parallel with 100 pF 

Overvoltage Protection 

In+ to In-: 50 V continuous; 200 V peak (10 msec) 

IEPE mode 

Excitation 

2, 4, 8, 12, 16 or 20 mA 

Compliance voltage 

25 Volt 

Output Impedance 

>100 kΩ 

Sensor detection 

Shortcut: <4 Volt; Open: >19 Volt 

Counters (ACC+ type only) 

Inputs 

1 digital counter input 

3 digital inputs 

Fully synchronised with analog data 

Counter Modes 

counting, waveform timing, encoder, tacho, gear-tooth sensor 

General Counter Speciﬁcations 

See "SIRIUS counter speciﬁcations" 

Additional Speciﬁcations 

Input connector BNC 

BNC or TNC (others on request) 

TEDS support 

IEPE mode only 

 

SIRIUS

V20-1 149 / 336  

Brand	DEWESOFT
Model	SIRIUS Series
Category	Data Loggers
Language	English

DEWESOFT SIRIUS Series User Manual

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DEWESOFT SIRIUS Series Specifications

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