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RLC-SVD03A-EN 17
Temperature Sensor Checkout
.
1. Overall accuracy for any of the sensors is at least + 2 F over the range shown. Accuracy of matched sensors is + 1 F over specific ranges.
2. As you compare a thermistor resistance (or input voltage) reading with the “actual” temperature indicated by the thermometer, be sure to
consider the precision and location of the thermometer when you decide whether or not the thermistor is out of specified accuracy.
3. The thermistor resistances given do not account for the self-heating effects that are present when connected to the UCM. A connected
“operating” thermistor will read a slightly lower (less than 1%) resistance.
Table 3 Sensor Conversion Data: Outdoor Air (6RT3), Entering and Leaving Evap Water Temp Matched
Pairs (6RT7, 6RT8), and Saturated Evap and Comp Suction Refrigeration Temp (6RT9, 3B1RT5; 6RT10, 4B1RT6)
Actual
Te mp.
(F)
Actual
Resistance
(Ohms)
Thermistor
Voltage
(Volts DC)
Actual
Te mp.
(F)
Actual
Resistance
(Ohms)
Thermistor
Voltage
(Volts DC)
Actual
Te m p.
(F)
Actual
Resistance
(Ohms)
Thermistor
Voltage
(Volts DC)
-20.0 170040.3 4.448 30.0 34838.9 3.120 80.0 9297.5 1.533
-19.0 164313.4 4.434 31.0 33833.3 3.086 81.0 9075.9 1.509
-18.0 158796.5 4.414 32.0 32861.4 3.047 82.0 8860.2 1.484
-17.0 153482.9 4.395 33.0 31935.3 3.018 83.0 8650.4 1.460
-16.0 148365.0 4.380 34.0 31038.7 2.983 84.0 8446.2 1.436
-15.0 143432.2 4.360 35.0 30170.5 2.949 85.0 8247.5 1.411
-14.0 138679.6 4.341 36.0 29329.5 2.910 86.0 8054.1 1.387
-13.0 134098.6 4.321 37.0 28515.0 2.876 87.0 7865.8 1.362
-12.0 129684.9 4.302 38.0 27725.9 2.842 88.0 7682.5 1.343
-11.0 125428.5 4.282 39.0 26961.4 2.808 89.0 7504.2 1.318
-10.0 121326.1 4.263 40.0 26220.8 2.773 90.0 7330.5 1.294
-9.0 117369.6 4.238 41.0 25503.0 2.739 91.0 7161.4 1.274
-8.0 113554.9 4.219 42.0 24807.5 2.705 92.0 6996.7 1.250
-7.0 109876.5 4.194 43.0 24133.3 2.671 93.0 6836.3 1.230
-6.0 106328.1 4.175 44.0 23479.7 2.637 94.0 6680.1 1.211
-5.0 102904.9 4.150 45.0 22846.1 2.603 95.0 6528.0 1.187
-4.0 99602.3 4.126 46.0 22231.9 2.568 96.0 6379.8 1.167
-3.0 96416.1 4.106 47.0 21636.2 2.534 97.0 6235.5 1.147
-2.0 93341.6 4.082 48.0 21058.7 2.505 98.0 6094.8 1.128
-1.0 90374.2 4.058 49.0 20498.4 2.471 99.0 5957.8 1.108
0.0 87510.3 4.033 50.0 19955.0 2.437 100.0 5824.3 1.089
1.0 84745.9 4.004 51.0 19427.9 2.402 101.0 5694.2 1.069
2.0 82077.1 3.979 52.0 18916.5 2.368 102.0 5567.4 1.050
3.0 79500.5 3.955 53.0 18420.3 2.334 103.0 5443.8 1.030
4.0 77012.3 3.926 54.0 17938.8 2.305 104.0 5323.3 1.016
5.0 74609.7 3.901 55.0 17471.6 2.271 105.0 5205.9 0.996
6.0 72288.8 3.872 56.0 17018.0 2.236 106.0 5091.5 0.977
7.0 70047.4 3.848 57.0 16577.8 2.207 107.0 4979.9 0.962
8.0 67881.9 3.818 58.0 16150.5 2.173 108.0 4871.1 0.942
9.0 65790.2 3.789 59.0 15735.7 2.144 109.0 4765.0 0.928
10.0 63768.7 3.760 60.0 15332.9 2.109 110.0 4661.5 0.913
11.0 61815.3 3.730 61.0 14941.7 2.080 111.0 4560.6 0.894
12.0 59927.8 3.701 62.0 14561.9 2.046 112.0 4462.2 0.879
13.0 58103.1 3.672 63.0 14193.0 2.017 113.0 4366.3 0.864
14.0 56339.6 3.643 64.0 13834.6 1.987 114.0 4272.6 0.850
15.0 54634.7 3.608 65.0 13486.5 1.958 115.0 4181.3 0.835
16.0 52986.4 3.579 66.0 13148.3 1.924 116.0 4092.2 0.820
17.0 51392.6 3.550 67.0 12819.8 1.895 117.0 4005.3 0.806
18.0 49851.6 3.516 68.0 12500.5 1.865 118.0 3920.5 0.791
19.0 48360.9 3.486 69.0 12190.2 1.836 119.0 3837.7 0.776
20.0 46919.2 3.452 70.0 11888.7 1.807 120.0 3756.9 0.762
21.0 45524.6 3.418 71.0 11595.6 1.777 121.0 3678.1 0.747
22.0 44175.6 3.389 72.0 11310.7 1.753 122.0 3601.1 0.732
23.0 42870.3 3.354 73.0 11033.7 1.724 123.0 3526.5 0.723
24.0 41607.6 3.320 74.0 10764.4 1.694 124.0 3453.6 0.708
25.0 40385.3 3.286 75.0 10502.6 1.670 125.0 3382.4 0.698
26.0 39202.7 3.257 76.0 10248.0 1.641 126.0 3313.0 0.684
27.0 38057.9 3.223 77.0 10000.4 1.616 127.0 3245.1 0.674
28.0 36950.0 3.188 78.0 9759.6 1.587 128.0 3178.9 0.659
29.0 35877.4 3.154 79.0 9525.4 1.563 129.0 3114.2 0.649
130.0 3051.0 0.635