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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.
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