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Watlow Ez-Zone PM8 - Chapter 9: Features; Input, Output, and Control Methods

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Watlow EZ-ZONE
®
PM PID Controller 73 Chapter 9 Features
9
Chapter 9: Features
Saving and Restoring User Settings ..........................74
Programming the Home Page ..............................74
Tuning the PID Parameters ................................74
Manual Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Autotuning with TRU-TUNE+
®
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Calibration Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Filter Time Constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Sensor Selection ..........................................77
Set Point Low Limit and High Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Scale High and Scale Low ..................................77
Range High and Range Low .................................77
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Duplex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
NO-ARC Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Retransmitting a Process Value or Set Point . . . . . . . . . . . . . . . . . . . . 78
Cool Output Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Control Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Auto (closed loop) and Manual (open loop) Control . . . . . . . . . . . . . . 79
On-Off Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Proportional Control .......................................80
Proportional plus Integral (PI) Control .........................80
Proportional plus Integral plus Derivative (PID) Control . . . . . . . . . . . 81
Dead Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Variable Time Base ........................................81
Single Set Point Ramping ...................................82
Alarms ..............................................82
Process and Deviation Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Alarm Set Points .......................................... 82
Alarm Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Alarm Latching ...........................................83
Alarm Silencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Alarm Blocking ...........................................83
Programming the EZ Key/s ................................83

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