Measurement ±80 mV
Measurement mode |
±80 mV | |||
---|---|---|---|---|
Measuring range, nominal |
-80…+80 mV | |||
Measuring range, end value (FSV) |
80 mV | |||
Measuring range, technically usable |
-85.9…+85.9 mV | |||
PDO resolution (including sign) |
24 bit |
16 bit 2) | ||
PDO LSB (Extended Range) |
10.24 nV |
2.621.. µV | ||
PDO LSB (Legacy Range) |
9.536.. nV |
2.441.. µV | ||
Basic accuracy: Measuring deviation at 23°C, with averaging, typ. 1) |
< ±0.02 %, < ±200 ppmFSV < ±16.0 µV | |||
Extended basic accuracy: Measuring deviation at 0…55°C, with averaging, typ. 1) 6) |
< ±0.0305 %, < ±305 ppmFSV < ±24.4 µV | |||
Offset/Zero point deviation (at 23°C) 1) |
EOffset |
< 95 ppmFSV | ||
Gain/scale/amplification deviation (at 23°C) 1) |
EGain |
< 165 ppm | ||
Non-linearity over the whole measuring range 1) |
ELin |
< 60 ppmFSV | ||
Repeatability, over 24 h, with averaging 1) |
ERep |
< 20 ppmFSV | ||
Temperature coefficient, typ. 1) |
TcGain |
< 5 ppm/K | ||
TcOffset |
< 5 ppmFSV/K < 0.40 µV/K | |||
Largest short-term deviation during a specified electrical interference test |
±0.03% = 300 ppmFSV | |||
Input impedance ±Input 1 (internal resistance)
|
Differential typ. approx. 4.12 MΩ || 11 nF CommonMode typ. approx. 40 nF against SGND |
1) valid for ELM3504-00x0 since HW06, ELM3502-00x0 since HW05
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.
ELM3502 (20 ksps)
Noise (without filtering) |
ENoise, PtP |
< 190 ppmFSV |
< 1484 digits |
< 15.20 µV |
ENoise, RMS |
< 32 ppmFSV |
< 250 digits |
< 2.56 µV | |
Max. SNR |
> 89.9 dB | |||
Noisedensity@1kHz |
< 0.03 | |||
Noise (with 50 Hz FIR filter) |
ENoise, PtP |
< 20 ppmFSV |
< 156 digits |
< 1.60 µV |
ENoise, RMS |
< 4.0 ppmFSV |
< 31 digits |
< 0.32 µV | |
Max. SNR |
> 108.0 dB |
ELM3504 (10 ksps)
Noise (without filtering) |
ENoise, PtP |
< 150 ppmFSV |
< 1172 digits |
< 0.01 mV |
ENoise, RMS |
< 25 ppmFSV |
< 195 digits |
< 2.00 µV | |
Max. SNR |
> 92.0 dB | |||
Noisedensity@1kHz |
< 0.03 | |||
Noise (with 50 Hz FIR filter) |
ENoise, PtP |
< 18 ppmFSV |
< 141 digits |
< 1.44 µV |
ENoise, RMS |
< 3.0 ppmFSV |
< 23 digits |
< 0.24 µV | |
Max. SNR |
> 110.5 dB |
Preliminary specifications:
Measurement mode |
±80 mV | ||
---|---|---|---|
Common-mode rejection ratio (without filter) |
DC: >115 dB typ. |
50 Hz: >105 dB typ. |
1 kHz: >80 dB typ. |
Common-mode rejection ratio (with 50 Hz FIR filter) |
DC: >115 dB typ. |
50 Hz: >115 dB typ. |
1 kHz: >115 dB typ. |
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. |