Measurement ±30 V
ELM300x
Measurement mode | ±30 V | |||
|---|---|---|---|---|
Measuring range, nominal | -30…+30 V | |||
Measuring range, end value (FSV) | 30 V | |||
Measuring range, technically usable | -32.212…+32.212 V | |||
PDO resolution (including sign) | 24 bit | 16 bit 2) | ||
PDO LSB (Extended Range) | 3.84 µV | 983.04 µV | ||
PDO LSB (Legacy Range) | 3.576.. µV | 915.55.. µV | ||
Basic accuracy: Measuring deviation at 23°C, with averaging 1) | < ±0.0075 %, < ±75 ppmFSV typ. < ±2.25 mV typ. | |||
Extended basic accuracy: Measuring deviation at 0…55°C, with averaging 1) 6) | < ±0.011 %, < ±110 ppmFSV typ. < ±3.30 mV typ. | |||
Offset/Zero point deviation (at 23°C) 1) | EOffset | < 20 ppmFSV | ||
Gain/scale/amplification deviation (at 23°C) 1) | EGain | < 60 ppm | ||
Non-linearity over the whole measuring range 1) | ELin | < 40 ppmFSV | ||
Repeatability, over 24 h, with averaging 1) | ERep | < 5.0 ppmFSV | ||
Temperature coefficient 1) | TcGain | < 2 ppm/K typ. | ||
TcOffset | < 1.5 ppmFSV/K typ. < 45 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. 660 kΩ || 11 nF CommonMode typ. 40 nF against SGND | |||
1) Valid for ELM3002 from HW04, ELM3004 from HW05, production since 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 equation in chapter "General information on measuring accuracy/measurement uncertainty" for quick estimation of usability over the specified ambient temperature range in operation (Tambient). 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 | < 70 ppmFSV | < 547 digits | < 2.10 mV |
ENoise, RMS | < 12 ppmFSV | < 94 digits | < 0.36 mV | |
Max. SNR | > 98.4 dB | |||
Noisedensity@1kHz | < 3.60 | |||
Noise (with 50 Hz FIR filter) | ENoise, PtP | < 9 ppmFSV | < 70 digits | < 270.0 mV |
ENoise, RMS | < 1.5 ppmFSV | < 12 digits | < 45 µV | |
Max. SNR | > 116.5 dB | |||
Common-mode rejection ratio (without filter), typ. | DC: >100 dB | 50 Hz: >80 dB | 1 kHz: >60 dB | |
Common-mode rejection ratio (with 50 Hz FIR filter), typ. | DC: >100 dB | 50 Hz: >100 dB | 1 kHz: >100 dB | |
ELM3004 (10 ksps)
Noise (without filtering) | ENoise, PtP | < 60 ppmFSV | < 469 digits | < 1.80 mV |
ENoise, RMS | < 12 ppmFSV | < 94 digits | < 0.36 mV | |
Max. SNR | > 98.4 dB | |||
Noisedensity@1kHz | < 5.09 | |||
Noise (with 50 Hz FIR filter) | ENoise, PtP | < 8 ppmFSV | < 63 digits | < 0.24 mV |
ENoise, RMS | < 1.5 ppmFSV | < 12 digits | < 45 µV | |
Max. SNR | > 116.5 dB | |||
Common-mode rejection ratio (without filter), typ. | DC: >100 dB | 50 Hz: >80 dB | 1 kHz: >60 dB | |
Common-mode rejection ratio (with 50 Hz FIR filter), typ. | DC: >100 dB | 50 Hz: >100 dB | 1 kHz: >100 dB | |
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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. |