Measurement ±2.5 V
ELM300x
|
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 | |
|
Basic accuracy: Measuring deviation at 23°C, with averaging 1) |
< ±0.005 %, < ±50 ppmFSV typ. < ±0.13 mV typ. | ||
|
Extended basic accuracy: Measuring deviation at 0…55°C, with averaging 1) 6) |
< ±0.009 %, < ±90 ppmFSV typ. < ±0.23 mV typ. | ||
|
Offset/Zero point deviation (at 23°C) 1) |
EOffset |
< 15 ppmFSV | |
|
Gain/scale/amplification deviation (at 23°C) 1) |
EGain |
< 40 ppm | |
|
Non-linearity over the whole measuring range 1) |
ELin |
< 25 ppmFSV | |
|
Repeatability, over 24 h, with averaging 1) |
ERep |
< 2.5 ppmFSV | |
|
Temperature coefficient 1) |
TcGain |
< 2 ppm/K typ. | |
|
TcOffset |
< 1.0 ppmFSV/K typ. < 2.50 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 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 |
< 0.18 mV |
|
ENoise, RMS |
< 12 ppmFSV |
< 94 digits |
< 30 µV | |
|
Max. SNR |
> 98.4 dB | |||
|
Noisedensity@1kHz |
< 0.30 | |||
|
Noise (with 50 Hz FIR filter) |
ENoise, PtP |
< 9 ppmFSV |
< 70 digits |
< 22.50 µV |
|
ENoise, RMS |
< 1.5 ppmFSV |
< 12 digits |
< 3.75 µV | |
|
Max. SNR |
> 116.5 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 |
< 60 ppmFSV |
< 469 digits |
< 0.15 mV |
|
ENoise, RMS |
< 12 ppmFSV |
< 94 digits |
< 30 µV | |
|
Max. SNR |
> 98.4 dB | |||
|
Noisedensity@1kHz |
< 0.42 | |||
|
Noise (with 50 Hz FIR filter) |
ENoise, PtP |
< 8 ppmFSV |
< 63 digits |
< 20 µV |
|
ENoise, RMS |
< 1.5 ppmFSV |
< 12 digits |
< 3.75 µV | |
|
Max. SNR |
> 116.5 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 | |
|
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. |