LT-V: controlling a pressure control valve Presentation of the LT-V Data Logger (March 2014) # 1

LT-V: controlling a pressure control valve LT-V Applications  Valve opening / closing Isolate sub-networks to control water circulation  Precise measurement of nighttime flow  More precise leak detection  …  Pressure variation Reduce leaks  Normal pressure during the day / reduced at night  Output objective (> 85%) Increase network longevity  Reduce excess pressure at night

LT-V: controlling a pressure control valve LT-V = LT + 1 solenoid output  Specific product: LT + 1 Latch solenoid output expansion card, 3 wires, 12 V Compatible solenoid: Bermad S-985-3W (model compatible with many different models of valve). Path 1 Path 3 Path 2: Shared LT-V

LT-V: controlling a pressure control valve  The hydraulic cabling determines the behaviour of the valve  Opening / closing  Transfer between two pressure levels pre-set by the operator Opening / closing Operating modes Solenoid Transfer Day pressure / Night pressure Solenoid Day pressure Night Pressure Closure of the valve

LT-V: controlling a pressure control valve  Timed  One time slot per day  Each day, the solenoid switches:  from path 1 to path 3 at xx:xx (day)  from path 3 to path 1 at xx:xx (night)  Remote control by WEB LS  On flow  The solenoid switches when the flow threshold is exceeded Configuration of a threshold for average flow Requires a meter or flow meter  Remote control by WEB LS  Timed and flow  Control according to time slot and flow Overrides timed control if flow is higher than configured threshold (e.g.: intervention of fire brigade at night)  Remote control by WEB LS Control modes