OPTO 22 PAMUX, User Manual

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TEMPERATURE CONVERSIONS ROUTINES
C-2 Pamux User’s Guide
ALGORITHMS
These algorithms should be used for all Pamux-compatible analog input modules that produce data
to be converted to temperatures. The algorithms are listed by input module.
AD4 ICTD
TEMP = (0.08262 * VALUE%) - 188.4
AD5, AD5T TYPE J THERMOCOUPLE
TEMP = (VALUE% - A0) * A1 + A2
where A0, A1, and A2 depend on VALUE% and can be derived from the following table:
VVAALLUUEE% % AA00 AA11 AA22 TTeem mp p RRaange nge ((°°CC))
< 1 104 0.1923067 20.15 -20 to -1
1 to 161 0 0.1863354 0.10 0 to 30
162 to 354 161 0.1813472 30.19 31 to 65
355 to 551 354 0.1776649 65.10 66 to 100
552 to 867 551 0.1740506 100.15 101 to 155
868 to 1766 867 0.1724137 155.10 156 to 310
1767 to 2546 1766 0.1730769 310.00 311 to 445
2547 to 2895 2546 0.1719197 445.05 446 to 505
2896 to 3191 2895 0.1689189 505.10 506 to 555
3192 to 3464 3191 0.1654411 555.10 556 to 600
3465 to 3743 3464 0.1612903 600.20 601 to 645
3744 to 3901 3743 0.1572327 645.17 646 to 670
> 3901 3901 0.1546391 670.10 > 670
Accurate to ±0.2°C from -20°C to 700°C.