14
Temperature vs. Resistance Data
The EasyTouch PL4/PSL4 Control Systems use 10k Ohm thermistor sensors. When the solar
sensor is disconnected from the control system, the sensor will read 10k Ohm at 77º F (25ºC). Refer
to the following table for the resistance at other temperatures. An accurate reading should give a
temperature setting that is accurate
Temperature Resistance Temperature Resistance
°C °F
Ohm °C °F Ohm
-26
-15
139,300 16
60
15,310
-25 -13 130,300
18 65 13,480
-23 -10 118,000
21 70 11,880
-21 -5 100,200 24 75 10,500
-20 -4 97,000
25 25 77 10,000
-18 0 85,350
27 27 80 9,298
-15 5 72,910
29 29 85 8,250
-12 10 62,480
30 30 86 8,056
-9 15 53,640
32 32 90 7,331
-10 14 55,300
35 35 95 6,530
-7 20 46,230
38 38 100 5,826
-5 23 42,300
40 40 104 5,326
-4 25 39,910
41 41 105 5,209
-1 30 34,560
43 43 110 4,663
0 32 32,600
45 45 113 4,367
2 35 30,000
49 49 120 3,757
4.7 40 26,100
50 50 122 3,602
5 41 25,400
52 52 125 3,381
7 45 22,760
54 54 130 3,047
10 50 19,900
55 55 131 2,985
13 55 17,440
57 57 135 2,750
15 59 15,700
3. Run 22 AWG two-conductor cable (included in kit) between the sensor and the enclosure.
Route the cable up through the low voltage raceway to the circuit board. See illustration on
page 5.
4. Cut off the excess conductor and the strip conductors ¼ inch. Use waterproof connectors
(provided) to connect the sensor to cable.
EasyTouch
®
PL4/PSL4 Control Systems:
Insert the conductors into the
AIR
screw
terminals (
J21
) on right side of the EasyTouch PL4/PSL4 Control Systems circuit board. For
sensor circuit board screw terminal location (see illustration below and page 31).
