Potentiometer Measurement - Beckhoff EPP3504-0023 Short Manual

3.2.5

Potentiometer measurement

The potentiometer should be supplied with the integrated power supply unit (max. 5 V, configurable). The
slider voltage is then measured relative to the supply voltage and output in %. Technical, the measurement
is similar to a strain gauge half bridge.
Potentiometers from 1 kΩ can be used.
Diagnostics
• Slider breakage: full-scale deflection or 0 display
• Supply interruption: full-scale deflection or 0 display
Measurement mode
Operation mode
Measuring range, nominal
Measuring range, end value (FSV)
Measuring range, technically usable
PDO resolution
PDO LSB (Extended Range)
PDO LSB (Legacy Range)
Preliminary specifications:
Measurement mode
Basic accuracy: Measuring
deviation at 23°C, with
2)
averaging, typ.
Offset/Zero point deviation (at
23°C)
Gain/scale/amplification
deviation (at 23°C)
Non-linearity over the whole
measuring range
Repeatability
Noise (without filtering, at 23°C) E
Noise (with 50 Hz FIR filter, at
23°C)
Common-mode rejection ratio (without filter)
EPP3504-0023
Potentiometer (3/5-wire)
The supply voltage is configurable via CoE,
0.5...5 V
-1 ... 1 V/V
1 V/V
-1 ...1 V/V
24 bit (including sign)
0.128 ppm
0.119... ppm
Potentiometer (3/5-wire)
without Offset < ± 0.005 %
< ± 50 ppm
< ± 50 µV/V
with Offset < ± 0.015 %
< ± 150 ppm
< ± 150 µV/V
E < 140 ppm
Offset
E < 40 ppm
Gain
E < 30 ppm
Lin
E < 2 ppm
Rep
< 105.0 ppm
Noise, PtP
< 820 digits
E < 18.0 ppm
Noise, RMS
< 137 digits
Max. SNR > 95.1 dB
Noisedensity@1kHz
< 0.18
E < 9.0 ppm
Noise, PtP
< 70 digits
E < 1.5 ppm
Noise, RMS
< 12 digits
Max. SNR > 116.5 dB
3)
DC:
tbd
Version: 1.2
FSV
FSV
FSV
FSV
FSV
FSV
FSV
FSV
FSV
FSV
FSV
50 Hz:
typ. tbd typ.
Product overview
1 kHz:
tbd typ.
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