Resistance Check of Each Station
CAUTION:
TURN CONTROLLER OFF
Remove cover of controller to expose terminal strip.
1)
Touch (insert) one probe to the terminal labeled
COM (for common).
2)
Touch the other probe to the terminal of the station
(or MV) to be checked.
3)
Check the reading on your multimeter.
Acceptable range:
20-60 Ohms
Less than 20 indicates a short or crossed wires, more
than 60 indicates a broken wire, bad splice or bad
solenoid. Note that stations with several valves will have
proportionately lower resistance. For example, a station
with two valves connected will show half the resistance.
- 10 -
SET METER TO
200
PROBE
CONNECTIONS
BLACK
COM
RED
RB.DM200.TGuide.mech 2/3/03 10:18 AM Page 10
