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4.1.1 POWER OFF/ON Switch S-1 & Light
This illuminated selector switch controls electrical power to the controller, valve solenoid coils, vacuum motor relay
coil and the hydraulic motor starter coil. The light is illuminated as long as power is available to the controller and the
POWER switch is set to ON.
4.1.2 VACUUM MOTOR OFF/ON Switch S-2
This switch permits the operator to turn on the vacuum motor when sampling. The motor will need to be turned off
before opening the collection cabinet door.
4.1.3 PROBE MOVEMENT Push-button Switches S-3 thru S-10 (Old Style Control)
The push-button control panel is wired so that only one of the eight valve solenoids can be energized at any given
time. This prevents probe operators from initiating contradictory actions.
4.1.4 PROBE MOVEMENT Joy-stick Switches S-3 & S-4 (Standard JS Control)
Due to the physical arrangement of the switches on the joy-sticks, only one of the four valve solenoids controlled by
each joy-stick can be energized at a given time. As a consequence, two boom/probe motions can be initiated
simultaneously. However, if two boom motions are initiated simultaneously, both will occur at a slower rate because
of the limited pump capacity. It is much harder to accurately control two boom motions simultaneously.
4.1.5 Main Fuse
This fuse, located in a fuse block within the controller enclosure, protects the controller and probe components
against overloads and short circuits.
For 110/120 VAC, 1PH operation use ONLY a Buss Type FNM, 4 Amp, 250 Volt Slo-Blo fuse or equal.
For 220/240 VAC, 1PH operation use ONLY a Buss Type FNM, 2 Amp, 250 Volt Slo-Blo fuse or equal.
4.1.6 Terminal Strip
This 17-position barrier terminal strip is fastened to the sub-plate within the operators control enclosure. It serves as
the controller's interface with and connection point for all external circuits and for the components mounted on the
enclosure's front panel. Refer to the Certified Electrical Drawing(s).
4.1.7 Vacuum Motor(s) Relay
This 25 amp control relay makes and breaks the power to the vacuum motor(s).
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General