SEFRAM DAS220, User Manual

Page: 71 / 80

Page 11.2
The accuracy of the thermocouples is specified in append.
Compensation of the cold welding: ± 0.5°C
11.4. Pt100/Pt1000 Record

Current generator:

Pt100: 1mA

Pt1000: 100µA

Domain of use: -200°C to 850°C

2 wires or 3 wires

Correction resistance in 2-wire mode: max. 30Ω

max. resistance in 3-wire mode: 50Ω

Accuracy at 20°C room temperature: ±0.3°C ± 0.1% of the measurement value
11.5. Resistance Probe Record
2 input ranges:

1kΩ:

Current generator: 1mA

Accuracy 1Ω

10kΩ

Current generator: 100µA

Accuracy 10Ω
11.6. Sampling

Polling system (one sample per valid channel)

Resolution: 16 bits

Sampling period per channel 1ms to 100ms (see § 2.1.1)
( 2ms to 200ms if Pt100 / Pt1000 3 wires )

Filters: Butterworth filter order 2 from 10Hz to 0.01Hz
(the frequency of the filter must be max. half the total sampling frequency).