Error Due To Open Circuit Current Through Loop Resistance; Worst Case Repeatability For The Thermocouple/Mv Input Module - Allen-Bradley 1794-IT8 User Manual

Error Due to Open Circuit Current Through Loop Resistance

Worst Case Repeatability for the Thermocouple/mV Input Module

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