Raypak LONMARK Y-200 - Manual (Page 37)

37
Sensor Resistance at Various
Temperatures
If a sensor error is suspected, perform the following:
1. Examine the wiring, ensuring continuity from con-
troller to sensor(s).
2. Using a multimeter, measure resistance of sen-
sor(s) and compare the value with the Table M
below.
3. If all okay, replace main control board.
Table M: Sensor Resistance at Various Temperatures
Temperature (°F) Resistance (K Ohms)
-20 1666.3
-10 1193.1
0 863.6
10 631.7
20 466.7
30 348.0
40 262.0
50 199.0
60 153.6
70 119.4
80 93.5
90 73.8
100 58.6
110 46.9
120 37.7
130 30.5
140 24.9
150 20.5
160 16.9
170 14.1
180 11.7
190 9.9
200 8.3
210 7.0
220 6.0