Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module/ Instructions - Manual (Page 21)

SLC 500™ RTD/Resistance Input Module 21
Publication 1746-IN007C-EN-P - December 2002
RTD Accuracy and Temperature Drift Specifications
Input Type Accuracy (1)
(0.25 mA
Excitation)
(1) The accuracy values assume that the module was calibrated within the specified temperature range of 0°C to +60°C (+32°F
to +140°F).
Accuracy (1)
(1.0 mA
Excitation)
Temperature Drift (2)
(0.25 mA Excitation)
(2) Temperature drift specifications apply to a module that has not been calibrated.
Temperature Drift (2)
(1.0 mA Excitation)
Platinum
(385)
(3)
(3) The digits following the RTD type represent the temperature coefficient of resistance ( α ), which is defined as the resistance
change per ohm per °C. For instance, Platinum 385 refers to a platinum RTD with
α = 0.00385 ohms/ohm - °C or simply 0.00385/°C.
100 Ω ±0.5°C
(±0.9°F) ±0.7°C
(±1.3°F) ±0.012°C/°C
(±0.012°F/°F) ±0.020°C/°C
(±0.020°F/°F)
200
Ω
±0.6°C
(±1.1°F) ±0.7°C
(±1.3°F) ±0.015°C/°C
(±0.015°F/°F) ±0.020°C/°C
(±0.020°F/°F)
500 Ω ±0.7°C
(±1.3°F) ±0.5°C
(±0.9°F) ±0.020°C/°C
(±0.020°F/°F) ±0.012°C/°C
(±0.012°F/°F)
1000
Ω
±1.2°C
(±2.2°F) ±0.4°C
(±0.7°F) ±0.035°C/°C
(±0.035°F/°F) ±0.010°C/°C
(±0.010°F/°F)
Platinum
(3916)
(3)
100 Ω ±0.4°C
(±0.7°F) ±0.6°C
(±1.1°F) ±0.010°C/°C
(±0.010°F/°F) ±0.015°C/°C
(±0.015°F/°F)
200 Ω ±0.5°C
(±0.9°F) ±0.6°C
(±1.1°F) ±0.011°C/°C
(±0.011°F/°F) ±0.015°C/°C
(±0.015°F/°F)
500
Ω
±0.6°C
(±1.1°F) ±0.4°C
(±0.7°F) ±0.015°C/°C
(±0.015°F/°F) ±0.012°C/°C
(±0.012°F/°F)
1000 Ω ±0.9°C
(±1.6°F) ±0.3°C
(±0.6°F) ±0.026°C/°C
(±0.026°F/°F) ±0.010°C/°C
(±0.010°F/°F)
Copper
(426) (3) (4)
(4) Actual value at 0°C is 9.042
Ω
per SAMA standard RC21-4-1966.
10
Ω
±0.5°C
(±0.9°F) ±0.8°C
(±1.4°F) ±0.008°C/°C
(±0.008°F/°F) ±0.008°C/°C
(±0.008°F/°F)
Nickel
(618) (3) (5)
(5) Actual value at 0°C is 100
Ω
per DIN standard.
120
Ω
±0.2°C
(±0.4°F) ±0.2°C
(±0.4°F) ±0.003°C/°C
(±0.003°F/°F) ±0.005°C/°C
(±0.005°F/°F)
Nickel (672)
(3)
120
Ω
±0.2°C
(±0.4°F) ±0.2°C
(±0.4°F) ±0.003°C/°C
(±0.003°F/°F) ±0.005°C/°C
(±0.005°F/°F)
Nickel Iron
(518)
(3)
604 Ω ±0.3°C
(±0.5°F) ±0.3°C
(±0.5°F) ±0.008°C/°C
(±0.008°F/°F) ±0.008°C/°C
(±0.008°F/°F)
Resistance 150 Ω ±0.2 Ω ±0.15 Ω ±0.004 Ω /°C
(0.002
Ω
/°F)
±0.003 Ω /°C
(±0.002
Ω
/°F)
500
Ω
±0.5
Ω
±0.5
Ω
±0.012
Ω
/°C
(±0.007
Ω
/°F)
±0.012
Ω
/°C
(±.0.007
Ω
/°F)
1000 Ω ±1.0 Ω ±1.0 Ω ±0.025 Ω /°C
(±0.014 Ω /°F)
±0.025 Ω /°C
(±0.014 Ω /°F)
3000 Ω ±1.5 Ω ±1.2 Ω ±0.040 Ω /°C
(±0.023
Ω
/°F)
±0.040 Ω /°C
(±0.023
Ω
/°F)