Field Circuit Resistance(Ohms) Test Worksheet

This is a test of the field wiring attached to the controller.  This test guides you though the process of measuring the ohms resistance in the field wiring through each zone.  Using the guidelines below determine if each circuit/zone is good or bad.

Step 1.--Disconnect the common field wire(s) from the common terminal on the controller.

Step 2.--Set your multimeter to a Resistance range of 0 to 100 ohms.  

Step 3.--Hold one lead against the bare wire on the common wire.  With the other lead touch the terminals of the controller one by one.  Mark down on this sheet the Resistance(ohms) with the corresponding zones.

Zone#

Ohms Reading

Zone#

Ohms Reading

Zone#

Ohms Reading

 

 

 

 

 

 

1

______________

17

______________

33

______________

2

______________

18

______________

34

______________

3

______________

19

______________

35

______________

4

______________

20

______________

36

______________

5

______________

21

______________

37

______________

6

______________

22

______________

38

______________

7

______________

23

______________

39

______________

8

______________

24

______________

40

______________

9

______________

25

______________

41

______________

10

______________

26

______________

42

______________

11

______________

27

______________

43

______________

12

______________

28

______________

44

______________

13

______________

29

______________

45

______________

14

______________

30

______________

46

______________

15

______________

31

______________

47

______________

16

______________

32

______________

48

______________

 

Rule of Thumb:

                            0-6 ohms      --  a shorted circuit-bad solenoid or shorted wiring

                            6-12 ohms    -- a slow burn solenoid or Asco solenoid

                            12-20 ohms  -- normal/possible two solenoids on circuit or an Asco solenoid connected on circuit

                            20-60 ohms  --Normal operating range

                            60 ohms +   -- open circuit

Those circuits which fall in the Normal range are good circuits. The rest need to have thesolenoids and field wiring tested separately. Follow the Field Test Flow Chart to find the problem.

Control Tech USA, Inc 2005