Duct Temperature Sensor - Temperature and Resistance Data
Figure 601 (Sheet 2)

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E37011
A 737-300/400/500MAINTENANCE MANUAL
TEMPERATURE (`F)  RESISTANCE (OHMS) 
-40  36,820-52,340 
-35  31,650 44,260-
-30  27,290 37,540-
-25  23,570 31,960-
-20  20,440 27,270-
-15  17,750 23,350-
-10  15,460 20,050-
-5  13,500 17,260-
0  11,830 14,880-
5  10,380 12,880-
10  9,130 11,170-
15  8,050 9,710-
20  7,110-8,460 
25  6,280-7,410 
30  5,580-6,470 
35  4,960-5,680 
40  4,410-5,000 
45  3,940-4,400 
50  3,520-3,890 
55  3,150-3,440 
60  2,830-3,050 

TEMPERATURE (`F)  RESISTANCE (OHMS) 
65  2,540-2,710 
70  2,280-2,410 
75  2,050-2,160 
80  1,840-1,930 
85  1,650-1,750 
90  1,470-1,590 
95  1,320-1,440 
100  1,180-1,310 
105  1,060-1,190 
110  964-1,090 
115  870-986 
120  787-901 
125  713-823 
130  646-754 
135  587-691 
140  534-634 
145  486-584 
150  443-537 
155  445 453-
160  409-417 

RESISTANCE TABLE

50
40
 30
 20
 10
0
-40

TEMPERATURE (`F)
DUCT ANTICIPATOR TEMPERATURE SENSOR
RESISTANCE VS TEMPERATURE GRAPH

Duct Anticipator Temperature Sensor - Temperature and Resistance Data Figure 601 (Sheet 3)

RESISTANCE (KOHMS)

E37003
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A 737-300/400/500MAINTENANCE MANUAL
 S 016-030
 (3)  
Remove the temperature controller (AMM 21-61-81/401).

 S 866-031

 (4)  
Make sure the pack has been off for 20 minutes or until it has reached ambient temperature.

 E. Resistance Check Procedure
 S 976-032
 (1)  
Measure the temperature adjacent to the applicable duct temperature sensor.

 S 976-033

 (2)  
Write down the temperature.

 S 976-034

 (3)  
For the duct temperature limit sensor for the flight compartment, measure the resistance from pin 21 to pin 22 on connector D454 for the temperature controller (WDM 21-61-01).

 S 976-036

 (4)  
For the duct temperature limit sensor for the passenger cabin, measure the resistance from pin 21 to pin 22 on connector D456 for the temperature controller (WDM 21-61-01).

 S 976-038

 (5)  
For the duct anticipator temperature sensor for the passenger cabin, measure these resistances (WDM 21-61-01):

 (a)  
The resistance from pin 14 to pin 15 on connector D456 for the temperature controller.

 (b)  
The resistance from pin 15 to pin 16 on connector D456 for the temperature controller.

 S 976-040
 (6)  
For the duct anticipator temperature sensor for the flight
 compartment, measure these resistances (WDM 21-61-01):

 (a)  
The resistance from pin 14 to pin 15 on connector D454.

 (b)  
The resistance from pin 15 to pin 16 on connector D454.

 (7)  
Write down the resistance in Ohms that you measure.

 S 976-055

 (8)  
Find the temperature on Figure 601 that is nearest to the
 temperature that you wrote down.

 S 976-054
　
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