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
μ
A
Resistance/potentiometer
0 to 400
Ω
≤
0.1 %
500
μ
A
0 to 4000
Ω
≤
0.1 %
100
μ
A
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 k
Ω
0 to 10 V
≤
0.05 %
>
500 k
Ω
-10 to +10 V
≤
0.05 %
>
500 k
Ω
-1 to +1 V
≤
0.08 %
>
500 k
Ω
0 to 1 V
≤
0.08 %
>
500 k
Ω
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.
