Nivetec Thermo Scientific AquaSensors AquaClear AQT Series User Manual
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Contents
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Thermo Scientific AquaSensors™ AquaClear ™ Low Range Turbidimeter User Guide 3410. Relay (Option)Relay A and Relay B are optional features on the AV38. Relays are Form C with normally open and normallyclosed contacts – 120 Volts, 3 Amps. Connections are made with the optional terminal block on the left sideof the back panel.When installed, configuration of relay action is accessed through the “Relay A” and “Relay B” in the mainmenu.Top-level configuration of the relays is as follows:• Set Function: Sets the relay function for alarm, control or wash operation.• Parameter: Assigns either sensor (turbidity) or temperature to the relay function.• Activation: Configures the relay activation setpoints, deadbands and on/off delays settings.The activation parameters depend on which function is selected.• When set for ALARM the relays will activate based on the settings of low and high limits.• When set for CONTROL the relays will activate based on the settings of phase and a single setpoint.• When set for WASH the relay will activate based on programmed interval, duration and off-delay.Alarm and Control settings allow fine-tuning of activation criteria with deadband and delay functions.Activation parameters for Alarm, Control and Wash functions are listed in the Table 9.1ALARM CONTROL WASHSet Low Alarm Set Phase Set IntervalSet High Alarm Set Setpoint Set DurationSet Low Deadband Set Deadband Set Off-DelaySet High Deadband Set Off-Delay ExitSet Off-Delay Set On-DelaySet On-Delay ExitExitRefer to the AV38 Manual for detailed relay operation and setup. |
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