Measurement ±5 V, 0...5 V
|
Measurement mode |
±5 V |
0…5 V | |||
|---|---|---|---|---|---|
|
Measuring range, nominal |
-5…+5 V |
0…5 V | |||
|
Measuring range, end value (FSV) |
5 V | ||||
|
Measuring range, technically usable |
-5.368…+5.368 V |
0… 5.368 V | |||
|
PDO resolution |
24 bit (including sign) | ||||
|
PDO LSB (Extended Range) |
640 nV | ||||
|
PDO LSB (Legacy Range) |
596.. nV | ||||
|
Basic accuracy: Measuring deviation at 23°C, with averaging 1) |
< ±0.0055 %, < ±55 ppmFSV < ±0.3 mV | ||||
|
Extended basic accuracy: Measuring deviation at 0…55°C, with averaging, typ. 1) 6) |
< ±0.0095 %, < ±95 ppmFSV < ±0.5 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 < 2 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 |
±5 V |
0…5 V | |||
|---|---|---|---|---|---|
|
Noise (without filtering) |
ENoise, PtP |
< 90 ppmFSV |
< 703 digits |
< 0.45 mV | |
|
ENoise, RMS |
< 15 ppmFSV |
< 117 digits |
< 0.08 mV | ||
|
Max. SNR |
> 96.5 dB | ||||
|
Noisedensity@1kHz |
< 3.35 | ||||
|
Noise (with 50 Hz FIR filter) |
ENoise, PtP |
< 21 ppmFSV |
< 164 digits |
< 0.11 mV | |
|
ENoise, RMS |
< 3.5 ppmFSV |
< 27 digits |
< 17.50 µV | ||
|
Max. SNR |
> 109.1 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. |
|
Note: The channel also works in electrically bipolar mode and records negative values in the unipolar measuring ranges (measurement from 0 V, 0 mA, 4 mA, 0 Ω). This enables the channel to provide a precise diagnosis even with signals < 0. In these measuring ranges the limit value for the "Underrange Error" in Extended Mode is -1% of the full scale value (FSV). The limit value can be set in CoE object 0x80n0:32. This avoids irritating error messages if the channel is not wired (e.g. without sensor) or the electrical signal fluctuates slightly around zero. The process data value of 0x00000000 is not undershot. If the "UnderrangeError" detection is to be set even less sensitive, the magnitude of the negative limit value in the CoE object referred to above can be set even higher. |
