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A-3
Accuracy
When using a Pt 100 (
α = 0.00385) sensor input with a 75 to 150 °C
range, the accuracy will be 0.05% of span + 0.15 °C or 0.20 °C,
whichever is greater. Sample Calculation:[0.0005 (150-75) + 0.15] =
0.19 °C, which is less than 0.20 °C, so the accuracy equals 0.20 °C.
TABLE A-2. Model 244E Input Options and Accuracy.
Sensor
Options
Sensor
Reference
Input
Ranges
Recommended
Min. Span
(1)
Accuracy (whichever is greater)
2-, 3-, 4-wire RTDs °C °F °C °F
Pt 100 IEC 751, 1995 (α = 0.00385) –200 to 850 –328 to 1562 10 18 0.05% of span + 0.15 °C or 0.2 °C
Pt 100 JIS 1604, 1981 (α = 0.003916) –200 to 645 –328 to 1093 10 18 0.05% of span + 0.15 °C or 0.2 °C
Pt 200 IEC 751, 1995 (α = 0.00385) –200 to 850 –328 to 1562 10 18 0.01% of span or 0.4 °C
PT 500 IEC 751, 1995 (α = 0.00385) –200 to 850 –328 to 1562 10 18 0.01% of span or 0.3 °C
Pt 1000 IEC 751, 1995 (α = 0.00385) –200 to 300 –328 to 572 10 18 0.01% of span or 0.3 °C
Ni 120 Edison Curve No. 7 –70to300 –94 to 572 10 18 0.01% of span or 0.2 °C
Cu 10 Edison Copper Winding No. 1 –50to250 –58 to 482 10 18 0.5% of span or 1.5 °C
Thermocouples
(2)
Type B
(3)
NIST Monograph 175, IEC 584 100 to 1820 212 to 3308 25 40 0.2% of span or 1.0 °C
Type E NIST Monograph 175, IEC 584 –50 to 1000 –58 to 1832 25 40 0.1% of span or 0.5 °C
Type jJ NIST Monograph 175, IEC 584 –180 to 760 –292 to 1400 25 40 0.1% of span or 0.5 °C
Type K NIST Monograph 175, IEC 584 –180 to 1372 –292 to 2502 25 40 0.1% of span or 1.0 °C
Type N NIST Monograph 175, IEC 584 –200 to 1300 –328 to 2372 25 40 0.1% of span or 1.0 °C
Type R NIST Monograph 175, IEC 584 0 to 1768 32 to 3214 25 40 0.1% of span or 1.0 °C
Type S NIST Monograph 175, IEC 584 0 to 1768 32 to 3214 25 40 0.1% of span or 1.0°C
Type T NIST Monograph 175, IEC 584 –200 to 400 –328 to 752 25 40 0.1% of span or 0.5 °C
DIN Type L DIN 43710 –200 to 900 –328 to 1652 25 40 0.1% of span or 0.5 °C
DIN Type U DIN 43710 –200 to 600 –328 to 1112 25 40 0.1% of span or 0.5 °C
Type
W5Re/W26Re
ASTME 988-96 0 to 2000 32 to 3632 25 40 0.1% of span or 1.0 °C
Millivolt Input –10 to 100 mV 3mV 0.025 mV + 0.003% of span
2-, 3-, 4-wire Ohm Input 0 to 2000 ohms 20 ohm 0.75 Ω + 0.03% of span
(1) No minimum or maximum span restrictions within the input ranges. Recommended minimum span willhold noise within accuracy specification withdamping
at zero seconds.
(2) Total digital accuracy for thermocouple measurement: sum of digital accuracy +0.5 °C (cold junction accuracy)
(3) Accuracy for NIST Type B thermocouple is ±3.0 °C from 100 to 300 °C.