Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual - Manual (Page 81)

Publication 1746-UM614B-EN-P - September 2007
Module Specifications 81
Overall Accuracy
We define overall accuracy to include variances in cold-junction
compensation, calibration, non-linearity, and resolution.
Temperature scale
(selectable) °C or °F and 0.1 °C or 0.1 °F
Millivolt scale, dc
(selectable) 0.1 mV or 0.01 mV
Open-circuit detection
leakage current 20 nA typical
Open-circuit detection
(selectable) Upscale, downscale, or zero
Time to detect open-circuit 5 s, typical
Input step response 0…99.9% in 600 ms (worst case)
Input resolution See Input Resolution Graphs on following pages. They show
the smallest measurable value based on combined
hardware and software tolerances.
Display resolution See Channel Data Word Resolution table on page 51.
Overall module accuracy @
25 °C (77 °F) See Module Accuracy Table below.
Overall module accuracy
(0… 60 °C, 32…140 °F) See Module Accuracy Table below.
Overall module drift See Module Accuracy Table below.
Module update time Less than 500 ms
Channel turn-off time Up to one module update time
Input Type
Max Error
(1)
@ 25 °C
Max Error
(1)
@ 77 °F
Temperature Drift
(1)
(0… 60 °C)
J ±1.60 °C ±2.88 °F ±0.042 °C/°C, °F/°F
K ±3.80 °C ±6.84 °F ±0.096 °C/°C, °F/°F
T ±2.05 °C ±3.69 °F ±0.025 °C/°C, °F/°F
E ±2.40 °C ±4.32 °F ±0.058 °C/°C, °F/°F
S ±2.38 °C ±4.29 °F ±0.131 °C/°C, °F/°F
R ±2.23 °C ±4.02 °F ±0.130 °C/°C, °F/°F
B ±3.83 °C ±6.90 °F ±0.109 °C/°C, °F/°F
Attribute Value