SIRIUS®
5.12 STGM / STGM+
The STG-M module is a universal amplifier perfectly fitting for strain gage and voltage measurements.
5.12.1 STGMv2: Specifications
Inputs Voltage, full bridge strain, ½ bridge strain, ¼ bridge strain (120Ω and 350Ω), current (ext. Shunt)
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) ±10V (±500mV) ±1V (50mV) ±100mV (±5mV) ±10mV (±0.5mV)
Gain accuracy ±0.05% of reading
Offset accuracy (Dual Core) ±5 (2) mV ±0.5 (0.2) mV ±0.1 (0.1) mV ±0.1 (0.1) mV
Offset accuracy after Balance Amplifier 0.2mV 0.02mV 0.02mV 0.02mV
Typ. Dynamic Range@10kS (Dual Core) 137 dB (152 dB) 137 dB (147 dB) 130 dB (132 dB) 112 dB (112 dB)
Typ. SNR@10kS (Dual Core) 105 dB (121 dB) 104 dB (111 dB) 95 dB (95 dB) 75 dB (75 dB)
Typ. CMR @ 400Hz (1kHz) 86 dB (96 dB) 96 dB (95 dB) 110 dB (102 dB) 110 dB (102 dB)
Gain Drift Typical 10 PPM/K, max. 40 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° * f
in
[kHz] + 0.1° (@ 200 kS/sec)
Channel Cross talk 120 dB @ 10kHz
Input Coupling DC
Input Impedance 10 MΩ
Overvoltage Protection In+ to In-: 50 V continuous; 200V peak (10msec)
Excitation Voltage Free programmable (16 Bit DAC)
Predefined levels 0, 1, 2.5, 5, 10 and 12 V
DC
Accuracy ±0.05 % ±2 mV
Drift ±50 ppm/K ±100 μV/K
Load stability: 0% to 100% load <0.01%
Noise @ 10V/350Ω < 150 µVrms@10 kS
Line regulation over 20Ω of change < 0.005% @ 120Ω load
Sense Impedance to Exc / to GND 100 kΩ / > 100 MΩ
Current limit 45mA
Protection Continuous short to ground
Bridge Connection Types Full bridge, ½ bridge, ¼ bridge (3-wire)
Ranges 2mV/V…1000mV/V free programmable with Dual Core
Internal Bridge Completion ½ bridge 1 kΩ and ¼ bridge 120Ω and 350Ω
Typ. Bridge Completion Accuracy 0.05 %; TCR: 5 ppm/K (others on request)
Internal Shunt Resistor 59.88 kΩ, software selectable (others on request)
Typ. Shunt Resistor Accuracy 0.05 %; TCR: 10 ppm/K (others on request)
Input Short, Sensor Offset Adjust Software selectable
Counters (only on STGMv2+ type) 1 counter / 3 digital input, fully synchronised and alarm outpu
Counter Modes counting, waveform timing, encoder, tacho, geartooth sensor
Input Level Compatibility CMOS, LVTTL
Input Protection ±25Volt continuous
Alarm output Open collector, max. 100mA/30Volt
Sensor supply 5V/100mA; 12V/50mA
Additional Specifications
Input connector DSUB - 9, Lemo2B 8pin, Lemo2B 16pin (others on request)
TEDS support Standard + MSI adapters
Table 17: SIRIUS STG-M specifications
Page 76/166 www.dewesoft.com Doc-Version: 1.4.2
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