Owner's manual

Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 79
Module Data, Status, and Channel Configuration Chapter 4
Effects of Autocalibration
on Accuracy
The module performs autocalibration to correct for drift errors over
temperature. Autocalibration occurs immediately following configuration of a
previously unselected channel, during power cycle of enable channels and
every 5 minutes if so configured. The table below shows module accuracy with
and without calibration.
Table 21 - Module Accuracy
Input Type
(1) (2)
With Autocalibration Without Autocalibration
Maximum Error at
25 °C (77 °F)
Maximum Error at
60 °C (140 °F)
Temperature Drift (0…60 °C)
(32…140 °F)
100 Ω Platinum 385
±0.5 °C (±0.9 °F) ±0.9 °C (±1.62 °F) ±0.026 °C/°C (±0.026 °F/°F)
200 Ω Platinum 385
±0.5 °C (±0.9 °F) ±0.9 °C (±1.62 °F) ±0.026 °C/°C (±0.026 °F/°F)
500 Ω Platinum 385
±0.5 °C (±0.9 °F) ±0.9 °C (±1.62 °F) ±0.026 °C/°C (±0.026 °F/°F)
1000 Ω Platinum 385
±0.5 °C (±0.9 °F) ±0.9 °C (±1.62 °F) ±0.026 °C/°C (±0.026 °F/°F)
100 Ω Platinum 3916
±0.4 °C (±0.72 °F) ±0.8 °C (±1.44 °F) ±0.023 °C/°C (±0.023 °F/°F)
200 Ω Platinum 3916
±0.4 °C (±0.72 °F) ±0.8 °C (±1.44 °F) ±0.023 °C/°C (±0.023 °F/°F)
500 Ω Platinum 3916
±0.4 °C (±0.72 °F) ±0.8 °C (±1.44 °F) ±0.023 °C/°C (±0.023 °F/°F)
1000 Ω Platinum 3916
±0.4 °C (±0.72 °F) ±0.8 °C (±1.44 °F) ±0.023 °C/°C (±0.023 °F/°F)
10 Ω Copper 426
±0.8 °C (±1.44 °F) ±1.1 °C (±1.98 °F) ±0.032 °C/°C (±0.032 °F/°F)
120 Ω Nickel 618
±0.3 °C (±0.54 °F) ±0.5 °C (±0.9 °F) ±0.012 °C/°C (±0.012 °F/°F)
120 Ω Nickel 672
±0.3 °C (±0.54 °F) ±0.5 °C (±0.9 °F) ±0.012 °C/°C (±0.012 °F/°F)
604Ω Nickel-Iron 518
±0.3 °C (±0.54 °F) ±0.5 °C (±0.9 °F) ±0.015 °C/°C (±0.015 °F/°F)
150 Ω
±0.15 Ω ±0.25 Ω ±0.007 Ω/°C (±0.012 Ω/°F)
500 Ω
±0.5 Ω ±0.8 Ω ±0.023 Ω/°C (±0.041 Ω/°F)
1000 Ω
±1.0 Ω ±1.5 Ω ±0.043 Ω/°C (±0.077 Ω/°F)
3000 Ω
±1.5 Ω ±2.5 Ω ±0.07 Ω/°C (±0.130 Ω/°F)
(1) The accuracy values apply to both current sources.
(2) Above ratings apply when a 50/60 Hz filter is used.