Watlow-electric Micro-Based Autotuning Control SERIES 980/985 Manual de usuario descargar pdf (Pagina 4)

Chapter 1

Flgure

Series

980/985

Input

and

Output

Overview

Starting Out With The

Watlow Series 9801985,

A Microprocessor-Based

Control

Single Input

Type

N or

Pt2

Dual

Outputs-

PID

or ON/OFF

User Selectable

Heat, Cool or Alarm

Output

or 2

Percent Power

Output

Heating

Auto-tuning

General Description

Welcome to the Watlow Series

980/985,

a dual output, single input, micropro-

cessor-based,

1/8

DIN, auto-tuning temperature control, featuring the Auto-

matic/Manual capability with

bumpless

transfer. In the Auto mode, the control

has closed loop control with sensory feedback, while the Manual mode has

open loop control with user defined output power level.

The

980/985

accepts

a Type

N, or Platinel2 thermocouple,

RTD,

or process input. The

primary output is Heating or Cooling, while the secondary output can be Heat,

Cool or Alarm.

With the Series

980/985

you can select either

PID

or ON/OFF for Output 1 or

Output 2. You may input a complete set of

PID

parameters for both outputs,

and select automatic tuning for Output 1 from the front panel. This includes

proportional band, reset, rate and cycle

time.

By setting either output’s propor-

tional band to zero, the Series 9801985 becomes a simple ON/OFF control with

3°F

1.7°C

switching differential,

0.3°F

0.17°C

for 0.1

RTD.

Operator-friendly features include automatic LED indicators to aid in monitoring

and set-up, as well as a calibration offset at the front panel. The Watlow

Series

980/985

automatically stores all information in a non-volatile memory.

WATLOW Series

980/985

User’s Manual

Getting Started,

Chapter

1 2 3 4 5 6 7 8 9 ... 46 47

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Watlow-electric Micro-Based Autotuning Control SERIES 980/985 Manual de usuario Pagina 4

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