Allen-Bradley 1794-IT8 - Error Due to Open Circuit Current through Loop Resistance; Worst Case Repeatability for the Thermocouple;MV Input Module

Specifications A–9
Publication 1794-6.5.7 – March 1997 T emplate revised June 23, 1995
Error Due to Open Circuit Current Through Loop Resistance
Input Type Error per Ohm of Loop Resistance
B 0.091
o
C 0.164
o
F
E 0.013
o
C 0.023
o
F
J 0.016
o
C 0.029
o
F
K 0.024
o
C 0.043
o
F
R 0.076
o
C 0.137
o
F
S 0.083
o
C 0.149
o
F
T 0.022
o
C 0.040
o
F
N 0.028
o
C 0.050
o
F
C 0.055
o
C 0.099
o
F
L 0.015
o
C 0.028
o
F
mV
0.417µV (2.4Ω = 1 LSB of error)
Worst Case Repeatability for the Thermocouple/mV Input Module
Input Type
Repeatability with Filter
(o
C) (
o
F)
Repeatability without Filter
(
o
C) (
o
F)
B +1.00
o
C +1.80
o
F +2.00
o
C/
o
C +3.60
o
F/
o
F
E +0.16
o
C +0.29
o
F +0.32
o
C/
o
C +0.58
o
F/
o
F
J +0.20
o
C +0.36
o
F +0.40
o
C/
o
C +0.72
o
F/
o
F
K +0.28
o
C +0.50
o
F +0.56
o
C/
o
C +1.00
o
F/
o
F
R +1.10
o
C +1.98
o
F +2.20
o
C/
o
C +3.96
o
F/
o
F
S +1.00
o
C +1.80
o
F +2.00
o
C/
o
C +3.60
o
F/
o
F
T +0.27
o
C +0.54
o
F +0.54
o
C/
o
C +1.08
o
F/
o
F
N +0.34
o
C +0.61
o
F +0.68
o
C/
o
C +01.22
o
F/
o
F
C +0.13
o
C +0.23
o
F +0.26
o
C/
o
C +0.46
o
F/
o
F
L +0.19
o
C +0.30
o
F +0.37
o
C/
o
C +0.62
o
F/
o
F
mV
+12µV +12µV +24µV/
o
C +24µV/
o
F
Note: The filter is enabled by setting bit 02 in write word 0.