Measurement ±10 V, 0...10 V

ELM300x

Measurement mode

±10 V

0…10 V

Measuring range, nominal

-10…+10 V

0…10 V

Measuring range, end value (FSV)

10 V

Measuring range, technically usable

-10.737…+10.737 V

0…10.737 V

PDO resolution (including sign)

24 bit

16 bit 2)

24 bit

16 bit 2)

PDO LSB (Extended Range)

1.28 µV

327.68 µV

1.28 µV

327.68 µV

PDO LSB (Legacy Range)

1.192.. µV

305.18.. µV

1.192.. µV

305.18.. µV

Basic accuracy: Measuring deviation at 23°C, with averaging 1)

< ±0.005 %, < ±50 ppmFSV typ.

< ±0.50 mV typ.

Extended basic accuracy: Measuring deviation at 0…55°C, with averaging 1) 6)

< ±0.009 %, < ±90 ppmFSV typ.

< ±0.90 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.

< 10 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

< 0.70 mV

ENoise, RMS

< 12 ppmFSV

< 94 digits

< 0.12 mV

Max. SNR

> 98.4 dB

Noisedensity@1kHz

< 1.20 Measurement ±10 V, 0...10 V 1:

Noise (with 50 Hz FIR filter)

ENoise, PtP

< 9 ppmFSV

< 70 digits

< 90 µV

ENoise, RMS

< 1.5 ppmFSV

< 12 digits

< 15 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

< 0.60 mV

ENoise, RMS

< 12 ppmFSV

< 94 digits

< 0.12 mV

Max. SNR

> 98.4 dB

Noisedensity@1kHz

< 1.70 Measurement ±10 V, 0...10 V 2:

Noise (with 50 Hz FIR filter)

ENoise, PtP

< 8 ppmFSV

< 63 digits

< 80 µV

ENoise, RMS

< 1.5 ppmFSV

< 12 digits

< 15 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

Measurement ±10 V, 0...10 V 3:
Representation ±10 V measurement range

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 ±10 V, 0...10 V 4:
Representation 0…10 V measurement range

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.