West-control-solutions MRC 5000 Controller Manual Manual de usuario descargar pdf (Pagina 10)

TABLE 1

Temperature error in °C per 1000 feet of Lead wire

AWG Thermocouple Type:

No. J K T R S

10 0.03 0.09 0.04 0.10 0.11

12 0.05 0.13 0.06 0.16 0.16

14 0.09 0.21 0.10 0.27 0.26

16 0.14 0.34 0.15 0.41 0.42

18 0.22 0.55 0.25 0.68 0.68

20 0.36 0.86 0.39 1.08 1.09

24 0.88 2.19 0.99 2.72 2.73

TABLE 2

Temperature Error in °F per 1000 feet of Lead wire

AWG Thermocouple Type:

No. J K T R S

10 0.06 0.15 0.07 0.18 0.19

12 0.10 0.24 0.11 0.30 0.30

14 0.16 0.39 0.18 0.48 0.48

16 0.25 0.61 0.28 0.75 0.75

18 0.40 0.99 0.45 1.22 1.23

20 0.64 1.55 0.71 1.94 1.96

24 1.58 3.94 1.78 4.89 4.91

For 3 wire RTDs, the instrument can virtually eliminate all lead wire resistance error.

Two wire RTDs should be used only with lead lengths less than 10 feet, unless special input calibration is performed using the

iCor (Input Correction) capability. (See Section 4 for setting iCor.) To determine the temperature error resulting from the lead

length resistance, use the following equation:

Terr = TRe x L where; TRe = temperature error in °C or °F per 1000 feet

L = length of lead wire in thousands of feet

TABLE 3 2 Wire RTD

AWG No. Error °C Error °F

10 +/-5.32 +/-9.31

12 +/-9.31 +/-14.6

14 +/-13.3 +/-23.9

16 +/-21.3 +/-38.6

18 +/-34.6 +/-61.2

20 +/-54.5 +/-97.1

24 +/-86.5 +/-155.6

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West-control-solutions MRC 5000 Controller Manual Manual de usuario Pagina 10