Rockwell-automation 1746-NR4 SLC 500 RTD/Resistance Input Module/ Inst Bedienungsanleitung PDF herunterladen (Seite 22)

22 SLC 500™ RTD/Resistance Input Module

Publication 1746-IN012B-EN-P - May 2001

RTD Accuracy and Temperature Drift Specifications

When you are using 100Ω or 200Ω platinum RTDs with 0.5 mA excitation current,

refer to the important note on the next page about module accuracy.

RTD Type

Accuracy

(4)

(0.5 mA

Excitation)

(4) 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

(4)

(2.0 mA

Excitation)

Temperature

Drift

(6)

(0.5 mA Excitation)

(6) Temperature drift specifications apply to a module that has not been calibrated.

Temperature

Drift

(6)

(2.0 mA Excitation)

Platinum

(385)

(1)

(1) 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.

100Ω ± 1.0 °C

(±2.0 °F)

± 0.5 °C

(± 0.9 °F)

± 0.034 °C/°C

(± 0.061 °F/°F)

± 0.014 °C/°C

(± 0.025 °F/°F)

200

Ω ± 1.0 °C

(± 2.0 °F)

± 0.5 °C

(± 0.9 °F)

± 0.034 °C/°C

(± 0.061 °F/°F)

± 0.014 °C/°C

(± 0.025 °F/°F)

500

Ω ± 0.6 °C

(± 1.1 °F)

± 0.5 °C

(± 0.9 °F)

± 0.017 °C/°C

(± 0.031 °F/°F)

± 0.014 °C/°C

(± 0.025 °F/°F)

1000

Ω ± 0.6 °C

(± 1.1 °F)

± 0.5 °C

(± 0.9 °F)

± 0.017 °C/°C

(± 0.031 °F/°F)

± 0.014 °C/°C

(± 0.025 °F/°F)

Platinum

(3916)

(1)

100Ω ± 1.0 °C

(± 2.0 °F)

± 0.4 °C

(± 0.7 °F)

± 0.034 °C/°C

(± 0.061 °F/°F)

± 0.011 °C/°C

(± 0.020 °F/°F)

200

Ω ± 1.0 °C

(±2.0 °F)

± 0.4 °C

(± 0.7 °F)

± 0.034 °C/°C

(± 0.061 °F/°F)

± 0.011 °C/°C

(± 0.020 °F/°F)

500

Ω ± 0.5 °C

(± 0.9 °F)

± 0.4 °C

(± 0.7 °F)

± 0.014 °C/°C

(± 0.025 °F/°F)

± 0.011 °C/°C

(± 0.020 °F/°F)

1000

Ω ± 0.5 °C

(± 0.9 °F)

± 0.4 °C

(± 0.7 °F)

± 0.014 °C/°C

(± 0.025 °F/°F)

± 0.011 °C/°C

(± 0.020 °F/°F)

Copper

(426)

(1)(2)

(2) Actual value at 0°C is 9.042Ω per SAMA standard RC21-4-1966.

10Ω

Not allowed.

(5)

(5) To maximize the relatively small RTD signal, only 2 mA excitation current is allowed.

± 0.6 °C

(± 1.1 °F)

Not allowed.

(5)

± 0.017 °C/°C

(± 0.031 °F/°F)

Nickel

(618)

(1)(3)

(3) Actual value at 0°C is 100Ω per DIN standard.

120Ω ± 0.2 °C

(± 0.4 °F)

± 0.2 °C

(± 0.4 °F)

± 0.008 °C/°C

(± 0.014 °F/°F)

± 0.008 °C/°C

(± 0.014 °F/°F)

Nickel

(672)

(1)

120Ω ± 0.2 °C

(± 0.4 °F)

± 0.2 °C

(± 0.4 °F)

± 0.008 °C/°C

(± 0.014 °F/°F)

± 0.008 °C/°C

(± 0.014 °F/°F)

Nickel Iron

(518)

(1)

604Ω ± 0.3 °C

(± 0.5 °F)

± 0.3 °C

(± 0.5 °F)

± 0.010 °C/°C

(± 0.018 °F/°F)

± 0.010 °C/°C

(± 0.018 °F/°F)

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