Watlow Series 988 Enhanced Manual de usuario

Series 9881/8 DIN Microprocessor-Based Temperature/Process ControllerEnhanced Software Features Includes 986, 987, 988 and 989Watlow Controls1241 Bund

10 WATLOW Series 988 Enhanced Software FeaturesSample ApplicationA test engineer needs to control the temperature in a test chamber thatcan be operate

WATLOW Series 988 Enhanced Software Features 11DuplexRequirementsThe duplex control feature requires enhanced software and a process out-put. Overview

12 WATLOW Series 988 Enhanced Software FeaturesRatioRequirementsRatio control requires enhanced software. Two analog inputs are requiredto monitor the

2 WATLOW Series 988 Enhanced Software FeaturesTable of ContentsCascade . . . . . . . . . . . . . . . . . . . . . . . .3Differential . . . . . . . .

WATLOW Series 988 Enhanced Software Features 3CascadeRequirementsCascade control requires enhanced software and two analog inputs, input1 to monitor t

4 WATLOW Series 988 Enhanced Software Featuresdifference between the set point and the process temperature generates aninternal percent output value f

WATLOW Series 988 Enhanced Software Features 5The outer loop can be auto-tuned by setting [`AUt] to [PidA]. While auto-tuning, the outer loop will be

6 WATLOW Series 988 Enhanced Software FeaturesSample ApplicationA Series 988 controller is used to heat lube oil to 125°F with a screw-plug-style heat

WATLOW Series 988 Enhanced Software Features 7DifferentialRequirementsTwo inputs and the enhanced software option are required.OverviewDifferential co

8 WATLOW Series 988 Enhanced Software FeaturesSample ApplicationAn application using differential control is to maintain glass temperatureof a freezer

WATLOW Series 988 Enhanced Software Features 9Dual PID SetsRequirementsThe Series 988 controller needs the enhanced software option to use dualPID set