Ad590 And Lm335; Table 7 - Thermistor Constants - Newport 8000 User Manual

58 Chapter 4
The constants C1, C2, and C3 may all be expressed in the form n.nnn simplifying
entry into the 8000.
If high accuracy is not required, the Steinhart-Hart equation may be simplified to a
first order polynomial:
This equation is easier to solve and often provides adequate results. The table also
shows that the use of the simplified equation introduces temperature errors of less
than 0.5°C over the range -20°C to 50°C. Once the constants A' and B' are
determined, the 8000 is programmed with the following values of C1, C2 and C3:
4.5.1.7 Table of Constants
We have listed some common thermistors and included the appropriate calibration
constants for the temperature range -20°C to 50°C in Table 7. The Model 8000, by
default, uses the BetaTHERM 10K3A2 thermistor values.
4.5.2

AD590 and LM335

AD590 and LM335 sensors are not supported on dual or combination TECs.
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Temperature Controller Module Operation
1/T = A' + B' * Ln R
Manufacturer C1
BetaTHERM 10K3 1.129241
BetaTHERM 0.1K1 1.942952
BetaTHERM 0.3K1 1.627660
BetaTHERM 1K2 1.373419
BetaTHERM 1K7 1.446659
BetaTHERM 2K3 1.498872
BetaTHERM 2.2K3 1.471388
BetaTHERM 3K3 1.405027
BetaTHERM 5K3 1.287450
BetaTHERM 10K3 1.129241
BetaTHERM 10K4 1.028444
BetaTHERM 30K5 0.933175
BetaTHERM 30K6 1.068981
BetaTHERM 50K6 0.965715
BetaTHERM 100K6 0.827111
BetaTHERM 1M9 0.740239

Table 7 - Thermistor Constants

+4
C2 = B * 10
+7
C3 = C * 10
+3
C1 = A' * 10
+4
C2 = B' * 10
C3 = 0.000
C2 C3
2.341077 0.877547
2.989769 3.504383
2.933316 2.870016
2.771785 1.999768
2.682454 1.649916
2.379047 1.066953
2.376138 1.051058
2.369386 1.012660
2.357394 0.950520
2.341077 0.877547
2.392435 1.562216
2.213978 1.263817
2.120700 0.901954
2.106840 0.858548
2.088020 0.805620
1.760865 0.686600