Hycontrol capacitive switches with this option have an additional pair of terminals provided in the switch head that simply require a push button switch to connect these two terminals together and this is usually mounted at ground level local to the silo fill point.

After pushing this button the capacitive circuit is then loaded as if a product has touched the active part of the probe and the electronics (if working correctly!) will detect this change in capacitance and activate the relay to change its state. Any audio or visual alarms wired to this relay will then be activated and will continue until the ground level test button is released. If the test is successful then the operator can then proceed to fill the silo, confident that the high alarm will operate if required to do so.

Hycontrol provide a complete alarm and test panel solution for single or multipoint applications however a simple push button can easily be retrofitted to existing panel installations with little or no disruption to the plant operations providing the alarms and sirens already exist!

This ground level test facility is offered as an option on Hycontrol's range of capacitive, admittance and vibrating level switches.