Measurement IEPE ±1.25 V

Measurement mode

±1.25 V

Measuring range, nominal

-1.25…+1.25 V

Measuring range, end value (FSV)

1.25 V

Measuring range, technically usable

-1.342…+1.342 V

PDO resolution (including sign)

24 bit

16 bit 2)

PDO LSB (Extended Range)

160 nV

40.96 µV

PDO LSB (Legacy Range)

149.. nV

38.14.. µV

Input impedance ±Input 1

(internal resistance)

Differential typ. 2 MΩ || 1 nF

CommonMode typ. 10 nF against SGND

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”

Preliminary specifications:

Measurement mode

±1.25 V

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

< ±0.01% = 100 ppmFSV typ.

Offset/Zero point deviation (at 23°C)

EOffset

< 70 ppmFSV

Gain/scale/amplification deviation (at 23°C)

EGain

< 55 ppm

Non-linearity over the whole measuring range

ELin

< 25 ppmFSV

Repeatability, over 24 h, with averaging

ERep

< 20 ppmFSV

Noise (without filtering)

ENoise, PtP

< 90 ppmFSV

< 703 [digits]

ENoise, RMS

< 17 ppmFSV

< 133 [digits]

Max. SNR

> 95.4 dB

Noisedensity@1kHz

< 0.30 Measurement IEPE ±1.25 V 1:

Noise (with 50 Hz FIR filter)

ENoise, PtP

< 9 ppmFSV

< 70 [digits]

ENoise, RMS

< 2.0 ppmFSV

< 16 [digits]

Max. SNR

> 114.0 dB

Temperature coefficient

TcGain

< 8 ppm/K typ.

TcOffset

< 5 ppmFSV/K typ.

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.

Largest short-term deviation during a specified electrical interference test

±0.03% = 300 ppmFSV typ.

Measurement IEPE ±1.25 V 2:
Representation ±1.25 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 IEPE ±1.25 V 3:
Frequency response ELM3604, ±1.25 V measuring range, fsampling = 20 ksps, integrated filter 1 and 2 deactivated