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Three Inputs Allow GreaterFlexibility To accommodate unique systemconfigurations, the SERIES 988 offers two universal analog inputs and one event (digital) input. The event input allows the operator to select a function at the close of a switch. This can lock out the front panel, switch PID values, go to a remote or second set point, etc. Theinputs are optically isolated from alloutputs, eliminating the need for external isolation circuitry. Use Up To Four Outputs

W A T L O W

The controller can have up to fouroutputs total, including the standard Watlow output options, along with retransmit and communications. Up to three outputs can be defined as a power supply output to power external signal conditioners, eliminating the need for an external power supply. The output types are recognized by the controller tosimplify setup and operation, with noneed for DIP switches.

Temperature and Power Controllers catalog - 7347 Auto-Tuning PIDControllers

SERIES988/989

Enhanced Software Cont. Slidewire Feedback Valve Control Valve positioning feedback (percentopen, percent close) provides precise process control. The SERIES 988 is configurable for a wide variety of valves.•Accepts virtually any valve input•Front panel valve position display•Increased valve life with anti-hunting parameter•Greater process efficiency withprecise control•Easy setup; increased operatorproductivity
W A TL W PROCESS Input 1Input 2 L1L2L3L4 DEV% OUT DISPLAY AUTOMAN MODE SERIES 988 Product Highlights
Slide Wire Feedback / Position Sensor Single-Loop Thermocouple CCW - OpenCW - Close Auto-Tuning PID Easy to Operate The SERIES 988's operator interfacefeatures the simplicity you expect from a Watlow controller. The display key allows the operator to view information pertinent to the process, including, among others, deviation from set point, percent output and units of measurement.The display key also returns theoperator to the process and set point display from anywhere in the menu system. The setup menu is segmented into input, output, global, and communication parameters and you can move forward or backward throughout the parameter sequence. Specifications •EN 50081-2: 1994 Emissions•EN 50082-2: 1994 Immunity •73/23/EEC Low Voltage Directive •EN 61010-1: 1993 Safety •UL Accuracy Control Mode •Calibration accuracy and sensorconformity: ±0.1 percent of span, ±1 LSD, 25°C ±3°C (77°F ±5°F) ambient and rated line voltage ±10 percent•Accuracy span: 540°C (1000°F)minimum•Temperature stability: 0.1°C/°C(±0.2°F/°F) change in ambient •Dual input, quad output, optionalretransmit of set point or process variable•Programmable direct and reverse acting control outputs•One step auto-tuning
® #873, C-UL
® File #43684•NEMA 4X Agency Approvals Operator Interface •CE•89/336/EEC ElectromagneticCompatibility Directive •Local/remote set point capability•Dual, 4 digit LED displays Upper: 10 mm (0.4 in.) Lower: 8 mm (0.3 in.) •MODE, AUTO/MAN, DISPLAY, UP and DOWN keys 41