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) 6)

< ±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 from HW06, ELM3502-00x0 from 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 the equation for estimating usability at the given ambient temperature point or estimating usability over the specified ambient temperature range in operation (Tambient) as stated in chapter "General information on measuring accuracy/measurement uncertainty". 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:Fig.18: 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.