Acromet WG-602 Manual
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Contents
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27Electrical Installation1) Install the Turbidity Module (electronics card) on the inside, bottom of the control panel door using thesupplied screws.2) Connect the turbidity module to the I/O module using the supplied ribbon cable and any openconnector (the connectors on both boards operate in parallel).3) Pass the sensor cable through an open glad on the bottom of the analyzer.4) Connect the wires from the sensor cable to the terminal block on the lower left corner of the TurbidityModule, following the color order indicated on the module.Figure 6: Connecting Turbidity Sensor to Turbidity ModuleThe sensor cable may be cut or extended up to a maximum distance of 650 feet (200m) as needed.If the turbidity relay is not going to be connected to any external equipment, the installation is complete. Ifthe relay will be used to operate equipment based on the turbidity set point, the following steps will needto be followed:5.2.2 Relay Wiring and UseWiring of the Turbidity Relay (NTU relay) is identical to wiring of all other relays and should be connectedto a dependent (interlocked) power supply to prevent operation of equipment when the water supply is notactive. Likewise, it operates based on closed-loop control.The line (live) wire of the pump-dependent power source connects to the connection labeled Common (C)on the NTU relay. The line wire of the controlled external turbidity equipment is connected to the normallyopen (NO) or normally closed (NC) connection of each relay as appropriate. Normally Open means thatthe relay will be open (i.e. no power from the relay) until the analyzer calls for power; Normally Closedmeans that the relay will be closed (i.e. power from the relay) until the analyzer calls to stop power.1) Turn OFF all power sources to the analyzer.2) Connect the earth ground wire of the power supply to the ground return wire from the controlledexternal turbidity equipment.3) Connect the neutral wire of the power supply to the neutral wire from the controlled external turbidityequipment.4) Connect the line (live) wire of the power supply to the connector marked ‘C’ (common) on the NTUterminal block. |
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