Veris-technologies Quad 2800 Soil EC Mapping System - Operating Instr Manuel d'utilisateur télécharger pdf (Page 29)

OM17-Quad2800

6-7

Figure 3.5

2. If ohms jump over 2 ohms when the blade is rotated, and you were careful to maintain good

contact between the lead and the blade, the problem is likely inside the hub. Because

electrical signals cannot be sent consistently through the disk bearing, Veris has designed a

more reliable path for the EC signal to travel. A special hub with a spring plunger presses

against the bolt through the bearing, serving as a commutator. Shown below in Figure 3.6

is a view of the hubcap and plunger assembly. When ohm readings jump during blade

rotation, it is due to the balls on the bearing making intermittent and inconsistent contact.

See Maintenance and Service procedure #4: Spring Plunger adjustment and replacement

on adjusting and replacing spring plungers.

Figure 3.6

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Veris-technologies Quad 2800 Soil EC Mapping System - Operating Instr Manuel d'utilisateur Page 29