71
6 Annex
Resistance transmitter and resistor/potentiometer
Voltage, current (standard signals)
Description Measuring range Accuracy
1
Measuring current
Resistance transmitter 0 to 4000 Ω≤ 0.1 % 100 μA
Resistance/potentiometer 0 to 400 Ω≤ 0.1 % 500 μA
0 to 4000 Ω≤ 0.1 % 100 μA
Ambient temperature influence ≤ 100 ppm/K
Connection type
Resistance transmitter Three-wire circuit
Resistance/potentiometer Two/three/four-wire circuit
Smallest measuring span 60 Ω
Sensor lead wire resistance Max. 10 Ω per cable for two-wire and three-wire circuits
Resistance values Freely programmable within the limits in steps of 0.1 Ω
Sampling rate 3 or 6 channels: 125 ms
Input filter Digital filter, 2nd order; filter constant can be set from 0 to 100.0 s
Galvanic isolation See "Galvanic isolation"
1
The linearization accuracy value refers to the maximum measuring range. Small measuring ranges lead to reduced
linearization accuracy.
Description Measuring range Accuracy
1
Input resistance or bur-
den voltage
Voltage 0 to 70 mV ≤ 0.1 % > 500 kΩ
0 to 10 V ≤ 0.05 % > 500 kΩ
-10 to +10 V ≤ 0.05 % > 500 kΩ
-1 to +1 V ≤ 0.08 % > 500 kΩ
0 to 1 V ≤ 0.08 % > 500 kΩ
Current 4 to 20 mA ≤ 0.1 % < 2 V
0 to 20 mA ≤ 0.1 % < 2 V
Ambient temperature influence ≤ 100 ppm/K
Smallest measuring span
Voltage 5 mV
Current 0.5 mA
Measuring range start/end
Voltage Freely programmable within the limits in steps of 0.01 mV
Current Freely programmable within the limits in steps of 0.01 mA
Deviation below/above the mea-
suring range
According to NAMUR recommendation NE 43 (only current input 4 to 20 mA)
Sampling rate 3 or 6 channels: 125 ms
Input filter Digital filter, 2nd order; filter constant can be set from 0 to 100.0 s
Galvanic isolation See "Galvanic isolation"
1
The accuracy value refers to the maximum measuring range. Small measuring ranges lead to reduced linearization
accuracy.
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