Look in your manual and determine which two screws control the output for the alarm - whether its alarm one or alarm two etc. Those screws are connected to a relay that opens or closes when the alarm is triggered. There will be three screws associated with the alarm. One is "NO" normally open, One is a common or neutral, One is "NC" normally closed. When the alarm is triggered the NO and NC change. disconnect the wires connected to the alarms. Put an electrical conductivity meter between the common and either the NO or NC. One should have current going through it the other shouldn't. When the alarm is triggered by the setpoint of the alarm the circuit should open or close. The alarm is simply a relay that opens up in the controller when it reaches the setting and allows current to flow through or shut down.