SIRIUS® Measurement Modules
5.8 CHG / CHG+
5.8.1 CHG: Specifications
Inputs Voltage, IEPE, Charge, current (ext. Shunt),
ADC Type 24bit delta-sigma dual core with 100/5 kHz analogue anti-aliasing filter
Sampling Rate Simultaneous 200kS/sec
Ranges (Dual Core Low Range) ±10V (500mV) ±500mV (NA)
Input Accuracy (Dual Core) ±0.05% of reading ±5 (0.5) mV ±0.05 of reading ±0.5 mV
Typ. Dynamic Range@10kS (Dual Core) 140 dB (155 dB) 130 dB (NA)
SNR@50kS (Dual Core) 107 dB (124 dB) 98 dB (NA)
Typ. CMR @ 50Hz (1 kHz) 140 dB (120 dB) 140 dB (120 dB)
Gain Drift Typical 10 ppm/K, max. 30 ppm/K
Offset Drift Typical 1 μV/K + 5 ppm of range/K, max 5 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 180 dB @ 50Hz; 160 dB @ 1kHz
Input Coupling DC, AC (0.1 Hz, 1 Hz, 10 Hz or 100 Hz)
Input Impedance 1 MΩ in parallel with 100pF
Overvoltage Protection In+ to In-: 50 V continuous; 200V peak (10msec)
IEPE mode
Excitation 4, 8 or 12 mA
Compliance voltage 25 Volt
Output Impedance >100 kΩ
Sensor detection Shortcut: <4 Volt; Open: > 19Volt
Charge ranges (Low Range) ±100 000 pC (5000 pC) ±10 000 pC (500 pC)
Input accuracy (HPF 0.1Hz) ±0.5% of reading ±20 pC ±0.5% of reading ±5 pC
Dynamic Range@10kS (Dual Core) 130 dB (150 dB) 120 dB (140dB)
SNR@50kS (Dual Core) 107 dB (120 dB) 105 dB (118 dB)
Input coupling 0.01 Hz, 0.03 Hz, 0.1 Hz, 0.5 Hz, 1 Hz, 10 Hz or 100 Hz
Charge injection 1V
rms
, 20 Hz, 0.5% accuracy
Counters (only in CHG+ type) 1 counter/3 digital input, fully synchronised with analogue data
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 BNC or TNC (others on request)
TEDS support IEPE mode only
Table 11: SIRIUS-CHG specifications
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