SIRIUS® Measurement Modules
5.13 STG / STG+
5.13.1 STGv2: Specifications
Inputs Voltage, full bridge strain, ½ bridge strain, ¼ bridge strain, potentiometer, RTD, Resistance
ADC Type 24bit delta-sigma dual core with 100/5 kHz analogue anti-aliasing filter (5.2.1 SIRIUS® Dual Core
series: High Dynamic (up to 160 dB) page 49)
Sampling Rate Simultaneous 200kS/sec
Dual Core Ranges (Low) ±50V (2.5 V) ±10V (500 mV) ±1V (50 mV) ±100mV (5 mV)
Gain Accuracy ±0.05% of reading
Offset Accuracy (Dual Core) ±20(10)mV ±2(1)mV ±0.2(0.2)mV ±0.1(0.1)mV
Offset Accuracy after Balance Amplifier ±1mV ±0.1mV ±0.02mV ±0.01mV
Typ. Dynamic Range@10kS (Dual core) 137 dB (147 dB) 137 dB (152dB) 137 dB (147dB) 135dB (137 dB)
Typ. SNR@10kS (Dual Core) 108 dB (118 dB) 107 dB (125 dB) 107 dB (113 dB) 100 dB (100 dB)
Typ. CMR @ 50Hz/400Hz/1kHz 56 / 56 / 56 dB 88 / 86 / 84 dB 97 / 96 / 95 dB 115 / 112 / 102 dB
Gain Drift Typical 10 ppm/K, max. 30 ppm/K
Offset Drift Typical 0.3 μV/K + 2 ppm of range/K, max 0.8μV/K + 10 ppm of range/K
Gain Linearity <0.02%
Inter Channel Phase-mismatch 0.02° * f
in
[kHz] + 0.1° (@ 200 kS/sec and 10V range)
Channel Cross talk
120 dB @ 10kHz (Range 10V); 95 dB @ 10kHz (Range = 50V)
Input Coupling
1
DC, AC 1 Hz (3 Hz, 10 Hz per SW)
Input Impedance 1 MΩ between IN+ and IN- for 50 V Range; all other Ranges > 1GΩ
Input overvoltage protection 50 V Range: 300 V; all other Ranges: 50V (200 V peak for 10msec)
Excitation Voltage Free programmable (16 Bit DAC)
Predefined levels 0, 1, 2.5, 5, 10, 15 and 20 V
CD
Accuracy ±0.05 % ±2 mV
Drift ±10 ppm/K ±100 μV/K
Load stability: 0% to 100% load < 0.01%
Line regulation over 20 Ω of change < 0.005% @ 120 Ω load
Noise @ 10 Volt / 350 Ω < 150 µVrms@10 kS
Sense Impedance to Exc / to GND 100 kΩ / > 100 MΩ
Current limit 100mA (max. 800mW)
Protection Continuous short to ground
Excitation Current Free programmable (16 Bit DAC)
Predefined levels 0.1, 1, 2, 5, 10, 20 and 60 mA
DC
Accuracy (> 10mA) 0.1% ±2μA [0.5% ±50 μA]
Drift (> 10mA) 15 ppm/K [100 ppm/K]
Compliance voltage 20 Volt, max. 500 mW
Output Impedance >1 MΩ
Bridge connection types full bridge, ½ bridge and ¼ bridge (3- or 4-wire)
Ranges 2mV/V…1000mV/V free programmable with Dual Core
Internal bridge completion ½ bridge and ¼ bridge 120Ω and 350Ω
Bridge completion accuracy 0.05 %; TCR: 5 ppm/K (others on request)
Internal Shunt resistor 59.88 kΩ and 175 kΩ, bipolar to Exc+ or Exc- (others on request)
Short resistor accuracy 0.05 %; TCR: 10 ppm/K (others on request)
Input short, Sensor offset adjust Software selectable
Table 20: SIRIUS-STG specifications I
1 In- must be within ±10V referred to GND(iso); for Ranges 100 V the DC value of In- is not rejected
Doc-Version: 1.4.2 www.dewesoft.com Page 87/166
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