Measurement ±2.5 V
ELM3002-0305 (channel 1, channel 2), ELM3002-0405 (channel 2 only)
Measurement mode | ±2.5 V | |
|---|---|---|
Measuring range, nominal | -2.5 …+2.5 V | |
Measuring range, end value (FSV) | 2.5 V | |
Measuring range, technically usable | -2.684…+2.684 V | |
PDO resolution (including sign) | 24 bit | 16 bit 2) |
PDO LSB (Extended Range) | 320 nV | 81.92 µV |
PDO LSB (Legacy Range) | 298.. nV | 76.29.. µV |
Specific data (preliminary data in cursive format):
Measurement mode | ±2.5 V | |
|---|---|---|
Basic accuracy: Measuring deviation at 23°C, with averaging 1) | < ±0.015 % FSV, < ±150 ppm FSV typ. < ±375 µV typ. | |
Extended basic accuracy: Measuring deviation at 0…55°C, with averaging 1) 6) | < ±tbd., < ±tbd. ppm FSV typ. < ±tbd. µV typ. | |
Offset/Zero point deviation (at 23°C) 1) | EOffset | < tbd. ppm FSV |
Gain/scale/amplification deviation (at 23°C) 1) | EGain | < tbd. ppm |
Non-linearity over the whole measuring range 1) | ELin | < tbd. ppm FSV |
Repeatability 1) | ERep | < tbd. ppm FSV |
Temperature coefficient 1) | TcGain | < tbd. ppm/K typ. |
TcOffset | < tbd. ppm FSV /K typ. < tbd. µV/K typ. | |
Largest short-term deviation during a specified electrical interference test | < ±0.1 %FSV typ. | |
Input impedance ±Input (internal resistance) | Differential typ. approx. > 20 MΩ || < 1nF CommonMode typ. against SGND: tbd. | |
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.
ELM3002-0305 (channel 1, channel 2), ELM3002-0405 (channel 2 only) (50 ksps)
Noise (without filtering) | ENoise, PtP | < tbd. ppmFSV | < tbd. digits | < tbd. µV |
ENoise, RMS | < tbd. ppmFSV | < tbd. digits | < tbd. µV | |
Max. SNR | > tbd. dB | |||
Noisedensity@1kHz | < tbd. | |||
Noise (with 50 Hz FIR filter) | ENoise, PtP | < tbd. ppmFSV | < tbd. digits | < tbd. µV |
ENoise, RMS | < tbd. ppmFSV | < tbd. digits | < tbd. µV | |
Max. SNR | > tbd. dB | |||
Common-mode rejection ratio (without filter), typ. | DC: > tbd. dB | 50 Hz: > tbd. dB | 1 kHz: > tbd. dB | |
Common-mode rejection ratio (with 50 Hz FIR filter), typ. | DC: > tbd. dB | 50 Hz: > tbd. dB | 1 kHz: > tbd. dB | |
