Owner manual

Publication 1762-UM003A-EN-P - February 2003
Module Data, Status, and Channel Configuration 3-33
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 3.17 Module Accuracy
Input Type
(1)
With Autocalibration Without Autocalibration
Maximum Error at 25°C (77°F) Maximum Error at 60° C
(140°F)
Temperature Drift (0°C to 60°C)
(32°F to 140°F)
100Ω Platinum 385
±0.5°C (±0.9°F) ±0.9°C (±1.62°F) ±0.026°C/°C (±0.026°F/°F)
200Ω Platinum 385
±0.5°C (±0.9°F) ±0.9°C (±1.62°F) ±0.026°C/°C (±0.026°F/°F)
500Ω Platinum 385
±0.5°C (±0.9°F) ±0.9°C (±1.62°F) ±0.026°C/°C (±0.026°F/°F)
1000Ω Platinum 385
±0.5°C (±0.9°F) ±0.9°C (±1.62°F) ±0.026°C/°C (±0.026°F/°F)
100Ω Platinum 3916
±0.4°C (±0.72°F) ±0.8°C (±1.44°F) ±0.023°C/°C (±0.023°F/°F)
200Ω Platinum 3916
±0.4°C (±0.72°F) ±0.8°C (±1.44°F) ±0.023°C/°C (±0.023°F/°F)
500Ω Platinum 3916
±0.4°C (±0.72°F) ±0.8°C (±1.44°F) ±0.023°C/°C (±0.023°F/°F)
1000Ω Platinum 3916
±0.4°C (±0.72°F) ±0.8°C (±1.44°F) ±0.023°C/°C (±0.023°F/°F)
10Ω Copper 426
±0.6°C (±1.08°F) ±1.1°C (±1.98°F) ±0.032°C/°C (±0.032°F/°F)
120Ω Nickel 618
±0.2°C (±0.36°F) ±0.4°C (±0.72°F) ±0.012°C/°C (±0.012°F/°F)
120Ω Nickel 672
±0.2°C (±0.36°F) ±0.4°C (±0.72°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)
150Ω
±0.15Ω ±0.25Ω ±0.007Ω/° C (±0.012Ω/°F)
500Ω
±0.5Ω ±0.8Ω ±0.023Ω/°C (±0.041Ω/°F)
1000Ω
±1.0Ω ±1.5Ω ±0.043Ω/° C (±0.077Ω/°F)
3000Ω
±1.5Ω ±2.5Ω ±0.072Ω/° C (±0.130Ω/°F)
(1) The accuracy values apply to both current sources.