Beckett RWF40 Manual - Manual (Page 52)

52/57 CC1B7865en 01.09.2005 HVAC Products
11. Technical data
For resistance thermometers, thermocouples or standard signals with 2
nd order digital
filter (configurable).
In 2-wire or 3-wire circuit:
Type
Measured value range
Pt100, Pt1000, IEC 751 -200...+850 °C (-328...+1562 °F)
Ni100, Ni1000, DIN 43760 -60...+250 °C (-76...+482 °F)
LG-Ni1000 -50...+160 °C (-58...+320 °F)
Line resistance: < 30
Ω
Line compensation
Not required with 3-wire circuit.
When using a resistance thermometer in a 2-wire circuit, line compensation can only be
made by means of the offset correction.
Type
Measured value range
Fe-CuNi «J» -200...+1000 °C (-328...+1832 °F)
NiCr-Ni «K» -200...+1372 °C (-328...+2502 °F)
Cu-CuNi «T» -200...+400 °C (-328...+752 °F)
NiCrSi-NiSi «N» -100...+1300 °C (-148...+2372 °F)
Pt-RhPt «S» 0...1768 °C (-32...3214 °F) ¹)
Pt-RhPt «R» 0...1768 °C (-32...3214 °F) ¹)
Pt-RhPt «B» 0...1820 °C (32...3308 °F) ¹)
¹) Only with RWF40.0X2B97
Cold-junction temperature: Internal
Signal
Internal resistance Ri
Voltage drop ∆Ue
DC 0...10 V R
i
= 2 M
Ω
DC 0...1 V R
i
= 2 M
Ω
DC 0...20 mA
∆U
e
= < 1 V
DC 4...20 mA
∆U
e
= < 1 V
Sampling time: 210 ms
Resistance measured value 0…1 k
Ω standard signals without linearization.
With 2-wire circuit
R = 0…1 k
Ω
Signal
Internal resistance Ri
Voltage drop ∆Ue
DC 0...10 V R
i
= 2 M
Ω
DC 0...20 mA
∆U
e
= 1 V
DC 4...20 mA
∆U
e
= 1 V
Sampling time: 630 ms
11.1 Inputs
11.1.1 Analog input 1 (actual value)
Resistance thermometers
Thermocouples
Standard signals
11.1.2 Analog input 2 (external setpoint, setpoint shift)
Potentiometer
Standard signals