Measurement ±20 mV
|
Measurement mode |
±20 mV | ||
|---|---|---|---|
|
Measuring range, nominal |
-20…+20 mV | ||
|
Measuring range, end value (FSV) |
20 mV | ||
|
Measuring range, technically usable |
-21.474…+21.474 mV | ||
|
PDO resolution (including sign) |
24 bit |
16 bit 2) | |
|
PDO LSB (Extended Range) |
2.56 nV |
655.36 nV | |
|
PDO LSB (Legacy Range) |
2.384.. nV |
610.37.. nV | |
|
Basic accuracy: Measuring deviation at 23°C, with averaging |
< ±0.04 %, < ±400 ppmFSV typ. < ±8.0 µV typ. | ||
|
Extended basic accuracy: Measuring deviation at 0…55°C, with averaging 6) |
< ±0.077 %, < ±770 ppmFSV typ. < ±15.4 µV typ. | ||
|
Offset/Zero point deviation (at 23°C) |
EOffset |
< 380 ppmFSV | |
|
Gain/scale/amplification deviation (at 23°C) |
EGain |
< 60 ppm | |
|
Non-linearity over the whole measuring range |
ELin |
< 100 ppmFSV | |
|
Repeatability, over 24 h, with averaging |
ERep |
< 25.0 ppmFSV | |
|
Temperature coefficient |
TcGain |
< 4 ppm/K typ. | |
|
TcOffset |
< 20.0 ppmFSV/K typ. < 0.40 µV/K typ. | ||
|
Input impedance ±Input 1 (internal resistance) |
Differential typ. approx. 4.12 MΩ || 11 nF CommonMode typ. approx. 40 nF against SGND | ||
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.
Preliminary specifications
Measurement mode | ±20 mV | |||
|---|---|---|---|---|
Noise (without filtering) | ENoise, PtP | < 540 ppmFSV | < 4219 digits | < 10.80 µV |
ENoise, RMS | < 90 ppmFSV | < 703 digits | < 1.80 µV | |
Max. SNR | > 80.9 dB | |||
Noisedensity@1kHz | < 0.03
| |||
Noise (with 50 Hz FIR filter) | ENoise, PtP | < 80 ppmFSV | < 625 digits | < 1.60 µV |
ENoise, RMS | < 13.0 ppmFSV | < 102 digits | < 0.26 µV | |
Max. SNR | > 97.7 dB | |||
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. | |
Largest short-term deviation during a specified electrical interference test | Value to follow | |||
|
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. |