Measurement ±2.5 V
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 |
24 bit (including sign) | |||
PDO LSB (Extended Range) |
320 nV | |||
PDO LSB (Legacy Range) |
298.. nV | |||
Basic accuracy: Measuring deviation at 23°C, with averaging 1) |
< ±0.0055 %, < ±55 ppmFSV < ±0.1 mV | |||
Extended basic accuracy: Measuring deviation at 0…55°C, with averaging, typ. 1) 6) |
< ±0.0095 %, < ±95 ppmFSV < ±0.2 mV | |||
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 |
< 30 ppmFSV | ||
Repeatability, over 24 h, with averaging 1) |
ERep |
< 5 ppmFSV | ||
Temperature coefficient, typ.1) |
TcGain |
< 2.2 ppm/K | ||
TcOffset |
< 0.4 ppmFSV/K < 1 µV/K | |||
Common-mode rejection ratio (without filter) 2) |
DC: >115 dB typ. |
50 Hz: >105 dB typ. |
1 kHz: >80 dB typ. | |
Common-mode rejection ratio (with 50 Hz FIR filter) 2) |
DC: >115 dB typ. |
50 Hz: >115 dB typ. |
1 kHz: >115 dB typ. | |
Largest short-term deviation during a specified electrical interference test 2) |
±0.05 % = 500 ppmFSV typ. | |||
Input impedance ±Input 1 (internal resistance)
|
Differential typ. approx. 10 MΩ || 11 nF CommonMode typ. approx. 40 nF against SGND |
1) Valid for ELM3148-00x0 since HW05, ELM3146-00x0 since HW03, ELM3144-00x0 since HW03, ELM3142-00x0 since HW02; specifications of predecessor-HW on request
2) Preliminary data
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.
Measurement mode |
±2.5 V | |||
---|---|---|---|---|
Noise (without filtering) |
ENoise, PtP |
< 100 ppmFSV |
< 781 digits |
< 0.25 mV |
ENoise, RMS |
< 16 ppmFSV |
< 125 digits |
< 0.04 mV | |
Max. SNR |
> 95.9 dB | |||
Noisedensity@1kHz |
< 1.79 | |||
Noise (with 50 Hz FIR filter) |
ENoise, PtP |
< 21 ppmFSV |
< 164 digits |
< 0.05 mV |
ENoise, RMS |
< 3.5 ppmFSV |
< 27 digits |
< 8.75 µV | |
Max. SNR |
> 109.1 dB |
![Measurement ±2.5 V 2:](Images/png/1904286091__Web.png)
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. |
![Measurement ±2.5 V 3:](Images/png/8733392011__Web.png)