Measurement IEPE ±10 V, 0...10 V

Measurement mode

±10 V

0…10 V

Measuring range, nominal

-10…+10 V 1)

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

Input impedance ±Input 1

(internal resistance)

Differential typ. 2 MΩ || 1 nF

CommonMode typ. 10 nF against SGND

1) For IEPE measurement applies: The input voltage must not fall below -5 V with respect to GND, the measuring accuracy is then no longer given. This means a measurement down to -10 V with respect to GND is only possible if at the same time an offset of at least +5 V is applied, as is usual with IEPE supply.

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

±10 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

< 60 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

< 100 ppmFSV

< 781 [digits]

ENoise, RMS

< 18 ppmFSV

< 141 [digits]

Max. SNR

> 94.9 dB

Noisedensity@1kHz

< 2.55 Measurement IEPE ±10 V, 0...10 V 1:

Noise (with 50 Hz FIR filter)

ENoise, PtP

< 10 ppmFSV

< 78 [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 ±10 V, 0...10 V 2:
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 IEPE ±10 V, 0...10 V 3:
Frequency response ELM3604, ±10 V measuring range, fsampling = 20 ksps, integrated filter 1 and 2 deactivated
Measurement IEPE ±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.