Beckhoff EPP3504-0023 Short Manual page 41

Measurement mode
Common- DC
mode
rejection ratio
(with 50 Hz
50 Hz
3)
FIR filter)
1 kHz
Temperature Tc
Gain
coefficient,
Tc
Offset
typ.
Largest short-term
deviation during a
specified electrical
interference test
Input Different
impedance ial
±Input 1
Commo
(internal
nMode
resistance)
Input 3-wire
impedance
Different
±Input 2
ial
(internal
Commo
resistance)
nMode
2
) In real bridge measurement, an offset adjustment is usually carried out after installation. The given offset
specification of the box module is therefore practically irrelevant. Therefore, specification values with and
without offset are given here. In practice, the offset component can be eliminated by the functions Tare and
also Features [} 000] of the box module or in the controller by a higher-level tare function. The offset
deviation of a bridge measurement over time can change, therefore Beckhoff recommends a regular offset
adjustment or careful observation of the change.
3
) Values related to a common mode interference between SGND and internal ground.
5
) The channel measures electrically to 8 mV/V, but displays its measured value scaled to 2 or 4 mV/V. The
Compensated function facilitates measurement of low levels even with high offset.
Noise (with/ without filtering):
Measurement mode
Noise E
Noise, PtP
(without
filtering, at
23°C)
E
Noise, RMS
Max.
SNR
Noiseden
sity@1kH
z
EPP3504-0023
StrainGauge/SG 1/2-Bridge 5/3-wire
16 mV/V 8 mV/V
DC: DC:
tbd. tbd.
tbd. tbd.
tbd. tbd.
< 10 ppm/K < 16 ppm/K
< 30 ppm / < 50 ppm
FSV
K K
< 0.48 µV/V/ < 0.4 µV/V/K
K
tbd. tbd.
tbd. tbd.
tbd. tbd.
No usage of this input in this mode
tbd. tbd.
tbd. tbd.
StrainGauge/SG 1/2-Bridge 5/3-wire
16 mV/V 8 mV/V
< 600.0 ppm < 1200.0 ppm
FSV
< 4688 digits < 9375 digits
< 9.6 µV/V < 9.6 µV/V
< 100.0 ppm < 200.0 ppm
FSV
< 781 digits < 1563 digits
< 1.6 µV/V < 1.6 µV/V
> 80.0 dB > 74.0 dB
< 22.63 < 22.63
4 mV/V 2 mV/V
DC: DC:
tbd. tbd.
tbd. tbd.
tbd. tbd.
< 30 ppm/K < 50 ppm/K
/ < 90 ppm / < 180
FSV FSV
K ppm
FSV
< 0.36 µV/V/ < 0.36 µV/V/
K K
tbd. tbd.
tbd. tbd.
tbd. tbd.
tbd. tbd.
tbd. tbd.
4 mV/V
< 2400.0 ppm
FSV
< 18750 digits
< 9.6 µV/V
< 400.0 ppm
FSV
< 3125 digits
< 1.6 µV/V
> 68.0 dB
< 22.63
Version: 1.2
Product overview
4 mV/V 2 mV/V
5)
(comp.) (comp.)
DC: DC:
tbd. tbd.
tbd. tbd.
tbd. tbd.
< 32 ppm/K < 64 ppm/K
< 100 < 200
/K ppm /K ppm
FSV
< 0.4 µV/V/K < 0.4 µV/V/K
tbd. tbd.
tbd. tbd.
tbd. tbd.
tbd. tbd.
tbd. tbd.
2 mV/V
< 4800.0 ppm
FSV
< 37500 digits
< 9.6 µV/V
< 800.0 ppm
FSV
< 6250 digits
< 1.6 µV/V
> 61.9 dB
< 22.63
5)
/K
FSV
FSV
FSV
41