Thermocouple/millivolt input module accuracy – Rockwell Automation 1771-IXE/D Thermocouple/Millivolt Input Module User Manual User Manual
Page 56
Specifications
A–2
Publication 1771-6.5.130 Ć May 1999
The accuracy of your thermocouple readings depends on:
•
module accuracy
•
lead resistance effect
•
accuracy of the thermocouple
The accuracy of the module is shown in NO TAG and NO TAG at
ambient temperature (25
o
C) and over the temperature range
(0–60
o
C).
Use the calibration procedure in Chapter 6 to adjust your module to
compensate for your specific environment.
Table A.A
Thermocouple Range Accuracy Based on Temperatures
Above 0
o
C
Thermocouple
Type
Temperature
Range
o
C
Max Error @
Calibration
Temperature (25
o
C)
1
Temperature Drift
o
C/
o
C (0-60
o
C)
or
o
F/
o
F (32-140
o
F)
E
-270 to 1000
+0.74
o
C/+1.08
o
F
+0.0400
J
-210 to 1200
+0.78
o
C/+1.10
o
F
+0.0423
K
-270 to 1380
+0.77
o
C/+1.15
o
F
+0.0640
T
-270 to 400
+0.77
o
C/+1.17
o
F
+0.0183
R
-50 to 1770
+1.50
o
C/+2.11
o
F
+0.0914
S
-50 to 1770
+1.50
o
C/+2.31
o
F
+0.0926
1
Error is specified from 0
o
C (32
o
F) to the maximum range of the thermocouple. Error does
not include thermocouple error (see appendix F).
Table A.B
Millivolt Range Accuracy
Millivolt
Range
Max Error
@ Calibration
Temperature (25
o
C)
Millivolt Drift
-100 to 100
+8.85uV
+3.856uV/
o
C
Table A.C
Radiated Noise Susceptibility
Radiated Noise
Susceptibility Error
300-1000MHz Circular Wave, Field Strength = 10V/M
< +1%
Thermocouple/Millivolt
Input Module Accuracy