Veris 3150 MSP3 Operating Instructions Manual page 95

4. Test continuity of coil. With voltmeter set to
ohms (resistance), insert both leads into the
weatherpack connector leading to each solenoid.
Start at the jumper wire (at first connection from
external controller) and move to connector at
solenoid. This tests the continuity of the signal
through the coil. You should have continuity if the
coil is working. Test both solenoids.
Figure 12.4 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 12.5, 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 12.5: 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.
If sampler shoe moves in reverse direction, disconnect solenoid wires (from external controller)
and reverse.
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Pub. # OM20-MSP3-3D