Veris Technologies MSP EC and pH (1997-2008 CF card drive 1.10M) - Operating Instructions - Manual (Page 54)

Veris Technologies
Pub. #OM MSP03-1
54
Figure 5. Testing continuity of solenoid coil (at weather-pack connector on jumper-wire)
5. Determine if coil is energizing. (This test integrates the previous two steps —if you have 12
volts going to the coil and the coil is functioning (has continuity), the coil should energize.) Touch
a small screwdriver or other metal object to the coil as shown in Figure 6, and activate manual
raise/lower switch. When the coil energizes it will hold the metal magnetically. If one coil doesn’t
energize, swap coils to determine whether it’s a bad coil or power problem.
Figure 6: Using screwdriver to test energizing of coils.
6. Clean solenoid valve. If coils energize and the cylinder doesn’t move, there must be
contamination in the solenoid cartidge. Remove and clean thoroughly with compressed air —be
careful not to damage or lose O-rings.
Additonal Tips…
If your system is equipped with lift hydraulics, you can swap coils or valves to verify the failed
part, before ordering a replacement.
If sampler shoe moves in reverse direction, disconnect solenoid wires (from external controller)
and reverse.