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 Measurement ±80 mV 1:

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 Measurement ±80 mV 2:

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.

Measurement ±80 mV 3:
Representation ±80 mV 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.