Measurement ±160 mV
ELM300x
Measurement mode | ±160 mV | ||
|---|---|---|---|
Measuring range, nominal | -160…+160 mV | ||
Measuring range, end value (FSV) | 160 mV | ||
Measuring range, technically usable | -171.8…+171.8 mV | ||
PDO resolution (including sign) | 24 bit | 16 bit 2) | |
PDO LSB (Extended Range) | 20.48 nV | 5.24288 µV | |
PDO LSB (Legacy Range) | 19.07.. nV | 4.882.. µV | |
Basic accuracy: Measuring deviation at 23°C, with averaging 1) 6) | < ±0.0085 %, < ±85 ppmFSV typ. < ±13.6 µV typ. | ||
Extended basic accuracy: Measuring deviation at 0…55°C, with averaging 1) 6) | < ±0.0155 %, < ±155 ppmFSV typ. < ±24.8 µV typ. | ||
Offset/Zero point deviation (at 23°C) 1) | EOffset | < 65 ppmFSV | |
Gain/scale/amplification deviation (at 23°C) 1) | EGain | < 40 ppm | |
Non-linearity over the whole measuring range 1) | ELin | < 35 ppmFSV | |
Repeatability, over 24 h, with averaging 1) | ERep | < 5.0 ppmFSV | |
Temperature coefficient 1) | TcGain | < 2 ppm/K typ. | |
TcOffset | < 3.5 ppmFSV/K typ. < 0.56 µV/K typ. | ||
Largest short-term deviation during a specified electrical interference test | ±0.03 % = 300 ppmFSV typ. | ||
Input impedance ±Input 1 (internal resistance)
| Differential typ. 4.1 MΩ || 11 nF CommonMode typ. 40 nF against SGND | ||
1) Valid for ELM3002 from HW04, ELM3004 from HW05, production from mid of 2021; specifications of predecessor-HW on request
2) The analog measurement is always done with 24 bits, in 16-bit mode the eight least significant bits are cut off. For further information see chapter “Commissioning”/ “Process data overview”
6) Calculated value according to the equation for estimating usability at the given ambient temperature point or estimating usability over the specified ambient temperature range in operation (Tambient) as stated in chapter "General information on measuring accuracy/measurement uncertainty". In real use, for example at a relatively constant ambient temperature Tambient, a lower (better) achievable uncertainty is attained. A specific calculation according to chapter "General information on measuring accuracy/measurement uncertainty" is recommended, especially if the instrument allows a wider ambient temperature range in operation than 0...55 °C.
ELM3002 (20 ksps)
Noise (without filtering) | ENoise, PtP | < 110 ppmFSV | < 859 digits | < 17.60 µV |
ENoise, RMS | < 19 ppmFSV | < 148 digits | < 3.04 µV | |
Max. SNR | > 94.4 dB | |||
Noisedensity@1kHz | < 30.40 | |||
Noise (with 50 Hz FIR filter) | ENoise, PtP | < 12 ppmFSV | < 94 digits | < 1.92 µV |
ENoise, RMS | < 2.0 ppmFSV | < 16 digits | < 0.32 µV | |
Max. SNR | > 114 dB | |||
Common-mode rejection ratio (without filter), typ. | DC: >115 dB | 50 Hz: >105 dB | 1 kHz: >80 dB | |
Common-mode rejection ratio (with 50 Hz FIR filter), typ. | DC: >115 dB | 50 Hz: >115 dB | 1 kHz: >115 dB | |
ELM3004 (10 ksps)
Noise (without filtering) | ENoise, PtP | < 95 ppmFSV | < 742 digits | < 15.20 µV |
ENoise, RMS | < 18 ppmFSV | < 141 digits | < 2.88 µV | |
Max. SNR | > 94.9 dB | |||
Noisedensity@1kHz | < 40.73 | |||
Noise (with 50 Hz FIR filter) | ENoise, PtP | < 10 ppmFSV | < 78 digits | < 1.60 µV |
ENoise, RMS | < 2.0 ppmFSV | < 16 digits | < 0.32 µV | |
Max. SNR | > 114 dB | |||
Common-mode rejection ratio (without filter), typ. | DC: >115 dB | 50 Hz: >105 dB | 1 kHz: >80 dB | |
Common-mode rejection ratio (with 50 Hz FIR filter), typ. | DC: >115 dB | 50 Hz: >115 dB | 1 kHz: >115 dB | |
Fig.17: Representation ±160 mV measurement range|
Note: In Extended Range Mode the Underrange/Overrange display in the PDO status has the character of an information/warning when the nominal measuring range is exceeded, i.e. no Error is displayed in the PDO status and LED. If the technical measuring range is also exceeded, Error = TRUE is also displayed. The detection limit for Underrange/Overrange Error can be set in the CoE. In Legacy Range mode, an Underrange/Overrange event also leads to an Error in the PDO status. |