Sentry SBC Installation, Operation & Maintenance Manual page 21

Model ISOLOK® PARK
1. Energize solenoids, Plunger extends into process stream, Air on ports P6 and P8 . Start sample timer
2. Sample time expires
3. Sample & Park Solenoids de-energized, Plunger retracts to the discharge position . Air on port P5
4. Discharge timer starts
5. Discharge timer expires
6. Energize Park solenoid . Plunger advances to the park position . Air on ports P5 and P8
7. Park timer starts
8. Park timer expires .
9. Go to step 1
Model MG (electric motor)
1. Energize motor, motor rotates sample tube 360 degrees
2. Sensor indicates full motor rotation, de-energize motor, start cycle timer
3. Cycle time expires
4. Go to step 1
Model PR
1. Energize solenoid, air cylinder extends sampler, start sample timer
2. Sample time expires
3. Solenoid de-energized, air cylinder retracts sampler, start cycle timer
4. Cycle time expires
5. Go to step 1
Model R
1. Energize solenoid, air cylinder extends sample tube, start sample timer
2. Sample time expires
3. Solenoid de-energized, air cylinder retracts sample tube, start auger delay timer
4. Auger delay time expires
5. Start motor, start auger run timer
6. Auger run timer expires
7. Stop motor, start cycle timer
8. Cycle time expires
9. Go to step 1
Sentry SBC Controller Original Instructions 21