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
–70 to 300
–94 to 572
10
18
0.01% of span or 0.2 °C
Cu 10
Edison Copper Winding No. 1
–50 to 250
–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
3 mV
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 will hold noise within accuracy specification with damping
at zero seconds.
(2) Total digital accuracy for thermocouple measurement: sum of digital ac0.5 °C (cold junction accuracy)
(3) Accuracy for NIST Type B thermocouple is ±3.0 °C from 100 to 300 °C.
