Rockwell-automation 1746-NR4 SLC 500 RTD/Resistance Input Module/ Inst Manual do Utilizador descarregar pdf (Página 21)

SLC 500™ RTD/Resistance Input Module 21

Publication 1746-IN012B-EN-P - May 2001

RTD Temperature Ranges, Resolution, and Repeatability

RTD Type Temp. Range

(0.5 mA Excitation)

(4)

(4) The temperature range for the 1000Ω RTD is dependent on the excitation current.

Temp. Range

(2.0 mA Excitation)

Resolution Repeatability

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 -200 °C to +850 °C

(-328 °F to +1562 °F)

-200 °C to +850 °C

(-328 °F to +1562 °F)

0.1 °C

(0.2 °F)

±0.2 °C

(± 0.4 °F)

200

Ω -200 °C to +850 °C

(-328 °F to +1562 °F)

-200 °C to +850 °C

(-328 °F to +1562 °F)

0.1 °C

(0.2 °F)

± 0.2 °C

(± 0.4 °F)

500

Ω -200 °C to +850 °C

(-328 °F to +1562 °F)

-200 °C to +850 °C

(-328 °F to +1562 °F)

0.1 °C

(0.2 °F)

± 0.2 °C

(± 0.4 °F)

1000

Ω -200 °C to +850 °C

(-328 °F to +1562 °F)

-200 °C to +240 °C

(-328 °F to +464 °F)

0.1 °C

(0.2 °F)

± 0.2 °C

(±0.4 °F)

Platinum

(3916)

(1)

100Ω -200 °C to +630 °C

(-328 °F to +1166°F)

-200 °C to +630 °C

(-328 °F to +1166 °F)

0.1 °C

(0.2 °F)

± 0.2 °C

(± 0.4 °F)

200

Ω -200 °C to +630 °C

(-328 °F to +1166°F)

-200 °C to +630 °C

(-328 °F to +1166 °F)

0.1 °C

(0.2 °F)

± 0.2 °C

(± 0.4 °F)

500

Ω -200 °C to +630 °C

(-328 °F to +1166°F)

-200 °C to +630 °C

(-328 °F to +1166 °F)

0.1 °C

(0.2 °F)

± 0.2 °C

(± 0.4 °F)

1000

Ω -200 °C to +630 °C

(-328 °F to +1166°F)

-200 °C to +230 °C

(-328 °F to +446 °F)

0.1 °C

(0.2 °F)

± 0.2 °C

(± 0.4 °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.

-100 °C to +260 °C

(-148 °F to +500 °F)

0.1 °C

(0.2 °F)

± 0.2 °C

(± 0.4 °F)

Nickel

(618)

(1)(3)

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

120Ω -100 °C to +260 °C

(-148 °F to +500 °F)

-100 °C to +260 °C

(-148 °F to +500 °F)

0.1 °C

(0.2 °F)

± 0.1 °C

(± 0.2 °F)

Nickel (672) 120

Ω -80 °C to +260 °C

(-112 °F to +500 °F)

-80 °C to +260 °C

(-112 °F to +500 °F)

0.1 °C

(0.2 °F)

± 0.1 °C

(± 0.2 °F)

Nickel Iron

(518)

604

Ω -100 °C to +200 °C

(-148 °F to +392 °F)

-100 °C to +200 °C

(-148 °F to +392 °F)

0.1 °C

(0.2 °F)

± 0.1 °C

(± 0.2 °F)

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