Watlow 989LF Operating Manual

Download

Series 988LF

1/8 DIN Microprocessor-Based Temperature/Process Controller

0600-0009-0000 Rev C

October 1999 Supersedes: 0600-0009-0000 Rev B

$10.00

Made in the U.S.A.

Printed on Recycled Paper 10% Postconsumer Waste

User’s Manual

Includes 986L, 987L, 988L, and 989L

User Level Targeted:

• New User .............................. go to page i

• Experienced User................... go to page 2.1

• Expert User............................. go to page A.8

Installers:

• Setup ..................................... go to page 4.1

• Wiring & Installation................ go to page 2.1

Watlow Controls

1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota USA 55987-5580

Phone: (507) 454-5300, Fax: (507) 452-4507 http://www.watlow.com

CUS

CTI

SATISFACTI

TOTAL

CUS

TOMER

3 Y ear W arranty

ISO 9001

Registered Company

Winona, Minnesota USA

Introduction to the Watlow Series 988LF Controllers

ii Using this Manual

ii Document Every Step iii Notes, Cautions and Warnings iii Technical Assistance iii We Value Your Feedback

Chapter 1 Hardware Setup

1.1 Dip Switch Locations and Functions

Chapter 2 Installation and Wiring

2.1 Panel Cutout and Dimensions

2.2 Installing the Series 988LF

2.3 Wiring the Series 988LF

2.3 Input-to-output Isolation

2.3 Power Wiring

2.3 Sensor Installation Guidelines

2.4 Wiring 0-20mA and 4-20mA Process Inputs

2.5 Wiring Example

2.7 Input 1 Wiring

2.8 Remote Set Point Option Wiring

2.9 Output 1 Wiring

2.10 Output 2 Wiring

Chapter 3

Front Panel and Display Loop

3.1 Keys and Displays

3.2 Display Loop

Chapter 4

The Setup Menus

4.1 Navigating the Setup Menus

4.2 Setup Prompts

Chapter 5

The Operation Menus

5.1 Navigating the Operation Menus

5.2 Display Prompts

Chapter 6

The Factory Menus

6.1 Reaching the Diagnostics Menu

6.5 Reaching the Calibration Menu

Chapter 7 Tuning, Manual Operation, Alarms and Error Codes

7.1 Auto-tuning (Heat and/or Cool)

7.2 Manual Tuning

7.3 Manual and Automatic Operation

7.4 Using Alarms

7.5 Error Code E1 and E2 Messages

7.6 Error Code Actions

Appendix

A.1 Warranty and Returns A.2 Glossary A.4 Index A.6 Specifications A.7 Model Number A.8 Menu Overview A.9 Declaration of Conformity

Table of Contents WATLOW Series 988LF User’s Manual

WATLOW Series 988LF User’s Manual i

Introduction

Introduction To The Watlow

Series 988LF Controllers

Figure Int.1 The Series 988LF Features.

Welcome to the Watlow Series 988LF, a dual output, single input, microprocessor-based, 1/8 DIN, auto-tuning temperature control, featuring automatic/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 988LF accepts a wide range of thermocouple sensors, along with RTD, and process inputs. The primary output is Heating or Cooling, while the secondary output can be Heating, Cooling, or Alarm.

With the Series 988LF, 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, or select automatic tuning for both heat and cool from the front panel. This includes proportional band, reset, rate, and cycle time. By setting either output’s proportional band to zero, the Series 988LF becomes a simple ON/OFF control with a 3°F or 1.7°C switching differential, 0.3°F or 0.17°C for 0.1° RTD.

Operator-friendly features include automatic LED indicators to aid in monitoring and setup, as well as a calibration offset at the front panel. The Watlow Series 988LF automatically stores all information in a nonvolatile memory.

PROCESS

L1 L2

DEV

% OUT

DISPLAY

SERIES 988LF

MODE

AUTO

MAN

Output 1

Control Heat/Cool

Output 2

Control Heat/Cool Alarm

Input 1

Sensor Input

Input 2

Remote Set Point Option

Auto-Tune

Heat/Cool

Process Deviation

from Set Point

Percent Power

ii WATLOW Series 988LF User’s Manual

Introduction

Using this Manual

This manual provides the information you will need to install and operate a Series 988LF controller.

If you need information about Series 988LF configurations and model numbers, refer to the Appendix of this manual.

This manual explains the five steps of setting up a Series 988LF controller:

1. Set and document all of the DIP switches, if applicable: Chapter 1.

2. Mount the controller: Chapter 2.

3. Wire and document the controller wiring: Chapter 2.

4. Configure and document the controller software: Chapters 3-6.

5. Run, test and adjust your application. Update documentation.

The Appendix provides definitions and specifications, along with application examples to help you optimize the safety and performance of your application. Use the Table of Contents and Index to find specific information.

Document Every Step

The Series 988LF provides powerful control features. Carefully document each step of the setup and any subsequent changes. This will make it much easier to change, adjust and troubleshoot your application.

Make the configuration documentation available to engineers and technicians, on all shifts, who may need to work with the Series 988LF. We provide space in this manual to record configurations. You may prefer to photocopy the blank forms and keep them in a separate binder. However, you maintain your documentation; be sure to replace all old copies of the documentation with updated versions whenever the controller configuration is changed.

NOTE: The Menu Overview in the Appendix shows all of the menus and prompts.

NOTE: The 12-digit number is printed on the top of the stickers on each side of the controller’s case and on the righthand or top circuit board.

Introduction

WATLOW Series 988LF User’s Manual iii

Introduction

Notes, Cautions and Warnings

We use note, caution and warning symbols throughout this book to draw your attention to important operational and safety information.

A bold text “NOTE” marks a short message in the margin to alert you to an important detail.

A bold text “CAUTION” safety alert appears with information that is important for protecting your equipment and performance. Be especially

careful to read and follow all cautions that apply to your application.

A bold text “WARNING” safety alert appears with information that is important for protecting you, others and equipment from damage. Pay

very close attention to all warnings that apply to your application.

The ç symbol (an exclamation point in a triangle) precedes a general CAUTION or WARNING statement.

The Ó symbol (a lightening bolt in a triangle) precedes an electric shock hazard CAUTION or WARNING safety statement.

Technical Assistance

If you encounter a problem with your Watlow controller, review all of your configuration information for each step of the setup to verify that your selections are consistent with your applications.

If the problem persists, an Application Engineer can discuss your application with you.

Before calling, please have the complete model number and user’s manual available. You can get technical support by dialing 507/494-5656, 7 a.m. to 7 p.m. Central Standard Time, or e-mail to wintechsupport@watlow.com.

We Value Your Feedback

Your comments and suggestions on this manual are welcome. Please send them to, Technical Writer, Watlow Controls, P.O. Box 5580, Winona, MN 55987-5580, or call (507) 454-5300, or fax (507) 452-4507. The Series 988LF User’s Manual is copyrighted by Watlow Winona, Inc., © October 1999, with all rights reserved. (1831)

iv WATLOW Series 988LF User’s Manual

Introduction

Notes

WATLOW Series 988LF User’s Manual 1.1

Hardware Setup, Chapter 1

Chapter 1 Hardware Setup

DIP Switch Locations and Functions

The Watlow Series 988LF has at least one and as many as three dual inline package (DIP) switches inside the controller, depending on the model number. They allow users to configure the controller for a variety of

input sensors, or to lockout front panel access to some functions.

To set any DIP switch:

• Remove the controller from the case by pressing firmly on the two release tabs on one side or the top of the bezel until they unsnap. Then firmly press the two release tabs on the opposite side or the bottom of the control until they unsnap. You will need to gently rock the bezel back and forth to release it from the chassis.

• Use the illustrations on the following pages to locate and set each DIP switch.

Figure 1.1 - Press the release tabs to remove the controller chassis.

Release

Tabs

PROCESS

L1 L2

DEV

% OUT

SERIES 988LF

DISPLAY

AUTO

MODE

MAN

Release

Tabs

Release

Tabs

MODE

DSPY

PROCESS

AUTO

DEV

% OUT

L1 L2

MAN

SERIES 989LF

Release

Tabs

1.2 WATLOW Series 988LF User’s Manual

Hardware Setup, Chapter 1

DIP Switches

Figure 1.2 Input DIP switches.

Input 1 Input 2

(Remote Set Point)

(98_L-2___-AA__) (98_L-_2__-AA__)

RTD

thermocouple: R, S or B

thermocouple: J, K, T, N, E, C, D, Pt2

or 0-50mV (high impedance)

0-20 or 4-20mA; 0-5, 1-5 or 0-10V

❶ Set the input DIP switches to match the sen-

sors you are using in your application. Only controllers with model number 98_L-2___-AA__ or 98_L-_2__-AA__ have an input DIP switch.

NOTE: The Input 2 DIP switch is mounted upside down.

NOTE: Only controllers with the indicated model numbers have these DIP switches.

Input 2 DIP

Input 1 DIP

Controller Chassis

Rear View

123

O N

↑

123

O N

↑

N O

123

↑

N O

123

O N

↑

123

O N

↑

N O

123

↑

N O

123

WATLOW Series 988LF User’s Manual 1.3

Hardware Setup, Chapter 1

DIP Switches

Figure 1.3 Lockout DIP switch.

no hardware lockout or (Switch 1 has no effect.)

lockout Setup and Factory menus or (Switch 1 has no effect.)

Control Chassis

Top View (986LF & 988LF)

Left-side View (987LF & 989LF)

Lockout DIP

OFF

❷ The lockout DIP switch hides the Setup Menu and the

Factory Menus (Diagnostics and Calibration). All units have a lockout DIP switch.

CAUTION: The lockout DIP switch makes the Setup and Factory menus unavailable. Configure all the Setup and Factory menus before locking them out. Failure to do so could result in damage to equipment in the event of a setup error.

O N

↑

O N

↑

O N

↑

O N

↑

1.4 WATLOW Series 988LF User’s Manual

Hardware Setup, Chapter 1

Notes

WATLOW Series 988LF User’s Manual 2.1

Installation and Wiring, Chapter 2

Chapter 2 Installation and Wiring

Figure 2.1 Series 988LF and Series 989LF dimensions.

NOTE: Adjustable mounting brackets can be side-mounted.

NOTE: Space panel cutouts at least 1.66 inches (42.2mm) apart.

NOTE: Holes can be cut in the panel using a Greenlee 1/8 DIN Hydraulic Kit #60068 (punch #60069, die #60070).

PROCESS

L1 L2

DEV

% OUT

SERIES 988LF

(55 mm)

2.18"

DISPLAY

AUTO

MAN

MODE

4.03"

(102mm)

PROCESS

L1 L2

4.03"

(102mm)

DSPY

DEV

% OUT

MODE

AUTO

MAN

SERIES 989LF

2.18"

(55 mm)

Panel Cutout

Maximum Panel

Thickness

0.38" (9.65mm)

3.62" + 0.03 -0.00 (92mm + 0.8)

1.77 + 0.02 -0.00 (45mm + 0.6)

0.68"

(17 mm)

Panel

4.06"

(103 mm)

Adjustable

Mounting Bracket

2.2 WATLOW Series 988LF User’s Manual

Installation and Wiring, Chapter 2

Installation

Installing the Series 988LF

Installing and mounting requires access to the back of the panel.

1. Make a panel cutout.

2. To remove the controller chassis from its case, press in firmly on the two tabs on one side or the top of the bezel until they unsnap, then unsnap the two tabs on the opposite side or the bottom. Pull the chassis out of the case by gently rocking it.

3. Slide the case into the panel cutout. Check to see that the gasket is not twisted, and is seated within the case bezel flush with the panel. Slide the mounting collar over the back of the control.

Panel

Adjustable

Mounting Bracket

Bezel

External Gasket

Mounting Collar

Release Tabs

Top and Bottom (986LF or 988LF) or Side (987LF or 989LF) View

Mounting Slots

Side (986LF or 988LF) or Top and Bottom (987LF or 989LF) View

4. Loosen the mounting bracket screws enough to allow for the mounting collar and panel thickness. Place each mounting bracket into the mounting slots (head of the screw facing the back of the controller). Push each bracket backward then down to secure it to the control case. To guarantee a proper NEMA 4X seal, Series 986LF and

988LF units (vertical) must have the mounting brackets located on either side of the unit. When installing Series 987LF and 989LF units (horizontal) the brackets must be on the top and bottom of the unit.

5. Make sure the case is seated properly. Tighten the installation screws firmly against the mounting collar to secure the unit. To ensure a

NEMA 4X seal, there should be no space between the bezel and panel. Overtightening the screws will distort the case and make it dif-

ficult to remove or replace the controller.

6. Insert the controller chassis into its case and press the bezel until all four tabs snap. Make sure the inside gasket is seated properly and not twisted.

7. To release the mounting brackets, loosen the mounting bracket screws and push the brackets forward, then pull it up and out.

NOTE: Removing the controller chassis from its case makes mounting easier.

Figure 2.2 Side and top view.

CAUTION: Follow the installation procedure exactly to guarantee a proper NEMA 4X seal. Make sure the gasket between the panel and the rim of the case is not twisted and is seated properly. Failure to do so could result in damage to equipment.

WATLOW Series 988LF User’s Manual 2.3

Installation and Wiring, Chapter 2

Wiring

Wiring the Series 988LF

Wiring options depend on the model number and DIP switch settings. Check the terminal designation stickers on either side of the controller and compare your model number to those shown here and with the model number breakdown on the inside back cover of this manual.

Input-to-output Isolation

The Series 988LF uses optical isolation between the analog inputs and the controller outputs. This isolation provides a 500V~ (ac) barrier to prevent ground loops when using grounded sensors and/or peripheral equipment.

Here is a breakdown of the isolation barriers:

• Analog inputs 1 and 2 are grouped together.

• Outputs 1 and 2 are grouped together.

Power Wiring

100 to 240 V~ (ac), nominal (85 to 264 actual)

Vertical Package 98 8

L - _ _ _ _ - A A _ _

Horizontal Package 98 9 L - _ _ _ _ - A A _ _

24 to 28 V‡‡(ac/dc), nominal (20 to 30 actual) Vertical Package 98 6

L - _ _ _ _ - A A _ _

Horizontal Package 98 7 L - _ _ _ _ - A A _ _

Sensor Installation Guidelines

Thermocouple input: Extension wire for thermocouples must be of the same alloy as the thermocouple itself to limit errors.

Using grounded thermocouples for both input 1 and remote set point option may create ground loop problems. To correct this problem, replace at least one of the grounded thermocouples with an ungrounded thermocouple. If the application requires grounded thermocouples, use an isolated transmitter, such as a Watlow Gordon 5702 isolated transmitter.

RTD input: Each 1Ω of lead wire resistance can cause a +2°F error when using a two-wire RTD. A three-wire RTD sensor overcomes this problem. All three wires must have the same electrical resistance (i.e., same gauge, same length, multi-stranded or solid, same metal).

Process input: Maintain isolation between input 1 and input 2 to prevent a ground loop. A ground loop may cause incorrect readings, dashes across the upper display or the display of error codes.

fuse

earth ground

L2L1

∫

WARNING: To avoid potential electric shock, use National Electric Code (NEC) safety practices when wiring and connecting this unit to a power source and to electrical sensors or peripheral devices. Failure to do so could result in injury or death.

Figure 2.3 Power wiring.

CAUTION: The Series 988LF will not function with two grounded thermocouple inputs. Avoid using a grounded thermocouple for both input 1 and input 2. Failure to follow this guideline could result in damage to equipment.

Wiring 0-20 and 4-20mA Process Inputs

Certain “transmitters” used in process input applications are producing internal resistor failures in the Watlow Series 988 family of controllers. This is only apparent with the Series 988 family 1/8 DIN units with Process Inputs selected (0-20mA or 4-20mA dc only).

We are noticing that an external resistor is required to prevent a high in-rush current which burns out the Series 988 family controllers’ 7-ohm internal resistor. This high in-rush current occurs initially on “power-up.” If the transmitter turns full on for a split second during power-up, the available current weakens or damages the internal resistor.

Example: 20V / 7 ohms = 2,857mA (too much!). The wiring diagram example below shows an application where a customer

is using a 4-20mA dc transmitter and power supply to feed the input of a Series 988 controller. The Rx range (100 to 400 ohms) for the external resistor is recommended. We suggest starting with 250 ohms.

Example: Customer is using a 24VÎ (dc) power supply to power up the 4-20mA dc transmitter that inputs to the Series 988 terminals 8 (-) and 10 (+). To figure out what the internal Series 988’s handling current is for the 0-20mA or 4-20mA dc input to the Series 988 controllers, we need to apply Ohm’s Law: The square root of Watts divided by Resistance equals Current. Applying that formula to the example below produces the following: Square Root of (0.125 Watts / 7 ohms) = 134 mA dc (handling input current). This is the acceptable input current for the Series 988 universal input board.

Reminder, the input impedance of 7 ohms handles the majority of our customer applications; the external resistor (Rx) is only for certain transducers/transmitters that spike on power-up or power-down. Please make sure your customer’s transmitter / transducer fall within our Series 988 family (1/8 DIN) of controllers’ Process Input specification of 7 ohms input impedance.

Figure 2.4 Process wiring example.

2.4 WATLOW Series 988LF User’s Manual

Wiring

988 Process

Input Control

4-20mA dc

Internal

Resistor

7Ω

1/8 Watt

—

100 to 400

ohms

Transmitter

—

24VÎ (dc)

Power Supply

—

WATLOW Series 988LF User’s Manual 2.5

Installation and Wiring, Chapter 2

Wiring Example

Figure 2.5 System wiring example.

∫

WARNING: Install high or low temperature limit control protection in systems where an over temperature fault condition could present a fire hazard or other hazard. Failure to install temperature limit control protection where a potential hazard exists could result in damage to equipment, property and injury to personnel.

WARNING: To avoid damage to property and equipment, and/or injury of loss of life, use National Electric Code (NEC) standard wiring practices to install and operate the Series 988LF. Failure to do so could result in such damage, and/or injury or death.

120 VÅ (ac)

earth ground

(+)

(-)

red

120VÅ (ac)

2 3

6 7 8

12 13

high limit

mechanical

fuse

2221

(+)

(-)

988L-10CA-AARR

rear view

1 2

process sensor limit sensor

(+)

(-)

1 CR-1

coil

contactor

SSR-240-10A-DC1 solid state relay

21 22

910

(+)

(-)

Series 988LF

988L-10CA-AARR

Temperature Control

12 + 13 -

3-32VÎ (dc)

(+)

48-260VÅ (ac)

146D-1J1F-1100

Temperature Limit

heater

out

Series 146

SSR-240-10A-DC1 Solid State Relay

(-)

high temperature light

fuse

heater

fuse

C NO NC

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17

(+)

(-)

normally open

momentary switch

1CR

optional

high

temp limit

light

Series 146 limit control 146D-1J1F-1100

Wiring Notes

Figure 2.6 Wiring notes.

NOTE: Sketch in your application on this page or a copy of it. See wiring examples in this chapter and in the Appendix.

2.6 WATLOW Series 988LF User’s Manual

Installation and Wiring, Chapter 2

L1 L2

earth ground

21 22

power

WATLOW Series 988LF User’s Manual 2.7

Installation and Wiring, Chapter 2

Figure

2.7c — 0-5V

ÎÎ

, 1-5VÎÎor 0-10VÎÎ(dc) Process

Universal signal conditioner

98 _ L - 2 _ _ _ - A A _ _ Input impedance: 10KΩ

Figure 2.7a — Thermocouple or 0-50mV (high impedance)

Thermocouple only

98 _ L - 1 _ _ _ - A A _ _ (no DIP switches)

Universal signal conditioner

98 _ L - 2 _ _ _ - A A _ _ Input impedance: 20MΩ

Figure 2.7

b — RTD (2 or 3 Wire) 100Ω

Universal signal conditioner

98 _ L - 2 _ _ _ - A A _ _

0-50mV

Figure 2.7d — 0-20mA or 4-20mA Process

Universal signal conditioner

98 _ L - 2 _ _ _ - A A _ _ Input impedance: 7Ω

DIP Switch

Setting

R, S, B

DIP Settings

J, K, T, N, C, E, D, Pt2,

0-50mV DIP Settings

DIP Switch

Setting

DIP Switch

Setting

NOTE: Successful installation requires five steps:

• Model number and software choice (Appendix);

• DIP switch settings (Chapter 1);

• Sensor match (Chapter 2 and Appendix);

• Sensor installation (Chapter 2); and

• Wiring (Chapter 2).

Jumper #9 to #10 for 2 wire

RTD

Input 1 Wiring

CAUTION: An external resistor is required for 0-20mA and 4-20mA process wiring to prevent a high inrush current which could burn out the controller’s 7-ohm resistor. See page

2.4 for recommendations.

123

O N

↑

123

O N

↑

S1 S2

O N

↑

8 9

123

O N

↑

123

O N

↑

9-+

2.8 WATLOW Series 988LF User’s Manual

Installation and Wiring, Chapter 2

Figure 2.8d —

0-20mA or 4-20mA Process

Universal signal conditioner

98 _ L - _ 2 _ _ - A A _ _

Input impedance: 7Ω

Remote Set Point Option

Figure 2.8c —

0-5VÎÎ, 1-5VÎÎor 0-10VÎÎ(dc) Process

Universal signal conditioner

98 _ L - _ 2 _ _ - A A _ _

Input impedance: 10KΩ

Remote Set Point Option

Figure 2.8b — RTD (2 or 3 Wire) 100Ω

Universal signal conditioner

98 _ L - _ 2 _ _ - A A _ _

Remote Set Point Option

19-+

Figure 2.8a —

Thermocouple or 0-50mV (high impedance)

Universal signal conditioner

98 _ L - _ 2 _ _ - A A _ _ Input impedance: 20MΩ

Remote Set Point Option

Jumper

#19 to #20

for 2 wire

RTD

DIP Switch

Setting

R, S, B

DIP Settings

J, K, T, N, C, E, D, Pt2,

0-50mV DIP Settings

DIP Switch

Setting

19 20

18S2S1

DIP Switch

Setting

NOTE: Successful installation requires five steps:

• Model number and software choice (Appendix);

• DIP switch settings (Chapter 1);

• Sensor match (Chapter 2 and Appendix);

• Sensor installation (Chapter 2); and

• Wiring (Chapter 2).

Input 2 Wiring

CAUTION: An external resistor is required for 0-20mA and 4-20mA process wiring to prevent a high inrush current which could burn out the controller’s 7-ohm resistor. See page

2.4 for recommendations.

↑

N O

123

↑

N O

123

↑

N O

123

0-50mV

↑

N O

123

↑

N O

123

WATLOW Series 988LF User’s Manual 2.9

Installation and Wiring, Chapter 2

Figure 2.9a — AC Outputs

Solid-state Relay with Contact Suppression

98 _ L - _ _ B _ - A A _ _

0.5 amps, minimum off-state impedance: 20KΩ

Electromechanical Relay with Contact Suppression

(NO and COM contacts only)

98 _ L - _ _ D _ - A A _ _

Form C, 5 amps, minimum off-state impedance: 20KΩ

Electromechanical Relay without Contact Suppression

98 _ L - _ _ E _ - A A _ _

Form C, 5 amps off-state impedance: 31MΩ

Solid-state Relay without Contact Suppression

98 _ L - _ _ K _ - A A _ _

0.5 amps, off-state impedance: 31MΩ

Output 1 Wiring

Figure 2.9b — Switched DC, Open Collector

98 _ L - _ _ C _ - A A _ _

Minimum load resistance: 500Ω

Figure 2.9d — 0-5V

ÎÎ

, 1-5VÎÎand 0-10VÎÎ(dc) Process

98 _ L - _ _ F _ - A A _ _

Minimum load impedance: 1KΩ

Figure 2.9c — 0-20mA and 4-20mA Process

98 _ L - _ _ F _ - A A _ _

Maximum load impedance: 800Ω

12 14

NOTE: Successful installation requires five steps:

• Model number and software choice (Appendix);

• DIP switch settings (Chapter 1);

• Sensor match (Chapter 2 and Appendix);

• Sensor installation (Chapter 2); and

• Wiring (Chapter 2).

External

Load

12 13

COM

(#14 for D & E outputs only)

Fuse

L2 L1

19 to 32VÎ (VDC)

+ VDC

790Ω

Internal Circuitry

12 13 14

External

13 14

Load

COM

Figure 2.10a — AC Outputs

Solid-state Relay with Contact Suppression

98 _ L - _ _ _ B

- A A _ _

0.5 amps, minimum off-state impedance: 20KΩ

Electromechanical Relay with Contact Suppression

(NO and COM contacts only)

98 _ L - _ _ _ D - A A _ _

Form C, 5 amps, minimum off-state impedance: 20KΩ

Electromechanical Relay without Contact Suppression

98 _ L - _ _ _ E - A A _ _

Form C, 5 amps off-state impedance: 31MΩ

Solid-state Relay without Contact Suppression

98 _ L - _ _ _ K - A A _ _

0.5 amps, off-state impedance: 31MΩ

2.10 WATLOW Series 988LF User’s Manual

Installation and Wiring, Chapter 2

Figure 2.10b —

Switched DC, Open Collector

98 _ L - _ _ _ C - A A _ _

Minimum load resistance: 500Ω

NOTE: Successful installation requires five steps:

• Model number and software choice (Appendix);

• DIP switch settings (Chapter 1);

• Sensor match (Chapter 2 and Appendix);

• Sensor installation (Chapter 2); and

• Wiring (Chapter 2).

Output 2 Wiring

19 to 32VÎ (VDC)

+ VDC

Internal Circuitry

790Ω

15 16 17

External

COM

Load

Fuse

15 16

(#17 for D & E outputs only)

15 16

External

Load

L2 L1

WATLOW Series 988LF User’s Manual 3.1

Front Panel and Display Loop, Chapter 3

Upper Display

Indicates the actual process value, prompt parameter value or error code.

DEV LED

When lit, the lower display shows the current deviation from the set point.

% OUT LED

When lit, the lower display shows the current percent output.

Up-arrow Key

Increases the value or changes the parameter in the upper display (except for set point changes in the Display Loop, which occur in the lower display). Hold the key down to increase the value rapidly. New data takes effect in five seconds or when the Mode key or Display key is pressed.

Up + Down Keys

Press simultaneously for three seconds to go to the Setup Menu. Continue to press both keys for another three seconds to go to the Factory Menu. Access to the Setup and Factory menus can be disabled with lockout DIP switch.

Lower Display

Indicates the set point, deviation, percent power, temperature unit, menu prompt name or alarm code.

L1, L2

These LED’s indicate when output 1 or 2 are active. Outputs can be configured as: Ot1 Control Ot2 Control or Alarm

Display Key

Pressing this key enters the Display Loop. Press the Display key at any time to return to this loop. The next page has more information on the Display Loop.

Auto/Man Key

In Manual mode the lower display shows percent output. Pressed once, it clears a latched alarms. If pressed again within five seconds it will toggle between Auto and Manual mode.

Auto/Man LED

Lit when the control is in Manual operation. Press the Auto/Man key twice to enter Automatic operation. When blinking, press the Auto/Man key to toggle between Auto and Manual. After five seconds without pressing the Auto/Man key, the LED stops blinking and returns to its previous state.

Mode Key

Enters new data and steps to the next prompt in the current menu.

Mode + Up-arrow Keys

Hold the Mode key then press the Up-arrow key to move backwards through the current menu. Scrolling stops when you reach the top of the menu.

Figure 3.1 Series 988LF Keys and Displays

Down-arrow Key

Decreases the value or changes the parameter in the upper display (except for set point changes in the Display Loop, which occur in the lower display). Hold the key down to decrease the value rapidly. New data takes effect in five seconds or when the Mode key or Display key is pressed.

Chapter 3 Front Panel and Display Loop

Keys and Displays

PROCESS

L1 L2

DEV

% OUT

DISPLAY

AUTO

MAN

MODE

SERIES 988LF

3.2 WATLOW Series 988LF User’s Manual

Front Panel and Display Loop, Chapter 3

Display Loop

The Display Loop is the “home” state of the Series 988LF controller. Pressing the Display key ∂ returns the controller to the Display Loop from any prompt in any menu. The controller automatically returns to the Display Loop from any menu when a minute passes without any keys being pressed.

Figure 3.2 The Display Loop

NOTE: For information on input 1 [`In1] ranges, refer to Chapter 4.

DISPLAY

[`988]

[`100]

[`988]

[``°C]

current input 1 reading set point 1 (change with Up-arrow > or Down-arrow < key)

current input 1 reading deviation from set point, process 1 minus set point 1 (DEV light on)

current input 1 reading percent output (%OUT light on)

current input 1 reading units selected (units, °F or °C)

Chapter 4 The Setup Menu

Navigating the Setup Menu

The Setup Menu displays the parameters that configure the Series 988LF’s features to your application.

[```0]

[`LOC]

[```1]

[`LOC]

[```2]

[`LOC]

❷ Press the Up-arrow > or the Down-arrow < key to select one of the prompt values

Figure 4.1 The Setup Menu

[```3]

[`LOC]

L1 L2

DEV

% OUT

SERIES 988LF

PROCESS

DISPLAY

AUTO

MAN

MODE

❶ To enter the Setup Menu, press the Up-arrow > and Down-arrow < keys for three seconds. The lower display shows the LOC [`LOC] prompt, and the upper displays shows its current level. All keys are inactive until you release both keys.

[`LOC]

MODE

[`In1]

MODE

[`rL1]

MODE

[`rH1]

MODE

[`rtd]

MODE

[`dEC]

MODE

[`rSp]

MODE

[`rL2]

MODE

[`rH2]

MODE

[`C_F]

MODE

[`Ot1]

MODE

[Prc1]

MODE

[`Ot2]

MODE

[`ALt]

MODE

[`Lat]

MODE

[`SIL]

Lock

Input 1

Range Low 1

Range High 1

RTD Calibration Curve

Decimal

Remote Set Point

Range Low 2

Range High 2

C or F

Output 1

Process 1

Output 2

Alarm Type

Latching

Silencing

Setup

Enter your settings, from the controller's upper display.

Setup Menu, Chapter 4 WATLOW Series 988LF Users Manual 4.1

Setup

Setup Prompts

NOTE: Decimal points may not always be in the position specified depending on the settings in the Decimal [`dEC] parameters in the Setup Menu.

❸ Use the Mode key µ to advance through the Setup Menu. You will not see every prompt in the Setup menu; the unit’s configuration and model number determine which prompts appear.

L1 L2

DEV

% OUT

SERIES 988LF

PROCESS

DISPLAY

AUTO

MAN

MODE

❹ Use the Up-arrow > and Down-arrow < keys to change the prompt setting. To move backwards through the menu hold the Mode key µ down and press the Up-arrow key >. Refer to the Appendix for model number options.

L1 L2

DEV

% OUT

SERIES 988LF

PROCESS

DISPLAY

AUTO

MAN

MODE

[`LOC]

Caution: Setting [`LOC] to [```2] or [```3] disables the Auto/Man

å and will force

key the controller into manual mode if an open sensor occurs. Verify that the controller is operating in the desired mode (auto or manual) before setting the lockout level. Failure to do so could result in damage to equipment and/or property.

Front Panel Lockout

Sets the lockout level for the front panel. This allows you to disable keys on the front of the controller.

• [```0] enables all keys.

• [```1] disables the Mode key µ.

• [```2] disables the Mode key µ and the Auto/Man key å.

• [```3] disables all keys.

[`LOC] This prompt always appears.

Default

↓

[```O] [```1] [```2] [```3]

[`LOC] [`LOC] [`LOC] [`LOC]

4.2 WATLOW Series 988LF Users Manual Setup Menu, Chapter 4

Setup

[`In1] ç

Caution: Changing the value of [`In1] changes most other prompts to the factory default values. Verify the correct sensor type before making a change. Failure to follow this guideline could result in damage to equipment or property.

Input 1

Select sensor input type. This selection must match the sensor type connected to terminals 8, 9 and 10. See Appendix for more information about sensors.

• Changing the value of [`In1] changes all other prompts to the

factory default values, [`LOC] Lock prompt and the [`C_F] prompt in the Setup Menu. If you change the value, the default warning

[[

[dFLt] will flash in the upper display.

[[

• Changes do not take effect automatically after five seconds; you must press the Mode key µ to enter the selector type change and advance to the next prompt.

[`In1] This prompt always appears.

If Default

↓↓

98_L-1___-AA__

no DIP J K T N E W5 W3 Pt2 0-50mV

[``J] [``H] [``t] [``n] [``E] [``C] [``d] [`Pt2] [0-50]

thermocouple [``n] [`In1] [`In1] [`In1] [`In1] [`In1] [`In1] [`In1] [`In1]

only

98_L-2___-AA__

Input 1 DIP J K T N E W5 W3 Pt2 0-50mV

thermocouple [``J] [``H] [``t] [``n] [``E] [``C] [``d] [`Pt2] [0-50]

123

O N

↑

[``n] [`In1] [`In1] [`In1] [`In1] [`In1] [`In1] [`In1] [`In1]

Input 1 DIP R S B

thermocouple [``r] [``S] [``b]

123

O N

↑

[`In1] [`In1] [`In1]

Input 1 DIP RTD RTD(0.1°)

RTD [`rtd] [`r†d]

123

O N

↑

[[`In1] [`In1]

Input 1 DIP 4-20mA 0-20mA 0-5VÎ 1-5VÎ 0-10VÎ (dc)

process [4-20] [0-20] [`0-5] [`1-5] [0-10]

123

O N

↑

[`In1] [`In1] [`In1] [`In1] [`In1]

Setup Menu, Chapter 4 WATLOW Series 988LF Users Manual 4.3

Setup

[`rL1] [`rH1]

NOTE: These values do not affect the low or the high set point limit for process alarms.

Range Low and Range High

Select the low and high range for input 1. These prompts limit the adjustment range for the set points. The default values are the same as the limits of the sensor you selected by setting the input DIP switch and selecting a value for Input [`In1].

• Process inputs are scaled by these values. Range high is the value displayed when the maximum process signal is present at the input. Range low is the value displayed when the minimum process signal is present at the input.

Example: Set [`In1] to [4-20] mA.

Set [`rL1] to [`100]. Set [`rH1] to [`500]. A 4mA input will display [`100]. A 12mA input will display [`300]. A 20mA input will display [`500].

• The low and high values of each sensor type are listed on the specifications page of the Appendix.

• Choose between Fahrenheit and Celsius at the [`C_F] prompt in the Setup Menu.

NOTE: When high impedance [`0-50] is selected for Input 1, the range high for both [``°C] and [``°F] can be extended to [9999]. The range low, when [``°C] is selected, can be extended to [-999]

[`rL1] [`rH1]

Range Low and Range High continued on next page.

[`rL1] [`rH1] These prompts always appear.

Default Default Default Default

↓↓ ↓↓

``°F] [`°C]

[`rL1] [`rH1] [`rL1] [`rH1]

[```J] [``32]…[1500] [```0]…`816] 98_L-1__-AA__ or [`in2] [`rL1] [`rH1] [`rL1] [`rH1] 98_L-2__-AA__

(K)

[```H] [-328]…[2500] [-200]…[1371]

[```t] [-328]…[`750] [-200]…[`399]

[```n] ``32]…[2372] [```0]…[1300]

[```E] [-328]…[1470] [-200]…[`799]

(W5)

[```C] [``32]…[4200] [```0]]]…[2316]

(W3)

[```d] [``32]…[4200] [```0]]]…[2316]

[`Pt2] [``32]…[2543 [```0]]…[1395]

high impedance

[0-50] [-999]…[[`999] [-573]…[`573]

[```r] [``32]…[3200] [```0]]…[1760] 98_L-2__-AA__ only

[```S] [``32]…[3200] [```0]…[1760]

4.4 WATLOW Series 988LF Users Manual Setup Menu, Chapter 4

Setup

[`rL1] [`rH1]

Range Low and Range High continued from previous page.

NOTE: The range high [`rH1] value for process inputs can be extended to [9999].

Default Default Default Default

↓↓ ↓↓

``°F] [`°C]

[`rL1] [`rH1] [`rL1] [`rH1]

[```b] [``32]…[3300] [```0]…[1816]

[`rtd] [-328]…[1472] [-200]…[`800]

[`r†d] [-9(9]…[99(9] [-7#3]…[53&7]

process

[4-20] [-999]…[`999] units

[0-20] [-999]…[`999] units

[`0-5] [-999]…[`999] units

[`1-5] [-999]…[`999] units

[0-10] [-999]…[`999] units

[0-50] [-999]…[`999] units

[`rtd]

RTD Calibration Curve

Select the RTD calibration curve. The RTD input uses either the European (DIN, 0.003850 ohms/ohms/°C) or Japanese (JIS, 0.003916 ohms/ohms/°C) linearization standard.

[`rtd] This prompt appears only if you have set [`In1] to [`rtd] or [`r†d].

Default

↓

[`din] [`J15]

[`rtd [`rtd

Setup Menu, Chapter 4 WATLOW Series 988LF Users Manual 4.5

Setup

[`dEC]

[`rSP]

Decimal

Select the decimal point location for process type input 1 data. This prompt, in conjunction with the Range Low and Range High prompts, allows you to format and limit units of measure for process 1.

• All prompts with units of measure related to input 1 will display in the selected decimal format.

• This affects propbands, alarm set points, process set points, calibration offsets, deadbands and ranges.

[`dEC] This prompt appears only if you have set input 1 [`In1] to a process input or a thermocouple input set to [0-50] mV.

Default

↓

[```)] [``)0] [`)00} [)000]

[`dEC] [`dEC] [`dEC] [`dEC]

Remote Set Point Input

[`rSP]

Remote Set Point Input continued on next page.

Enable a remote set point signal. The remote set point input selection switches are set to process at the factory.

[`rSP] This prompt appears only on controllers equipped with Remote Set Point Input hardware (98 _ L-_ 2__-AA__).

If Default

↓↓

RSP Input DIP J K T N E W3 W5 Pt2 0-50mV

123

O N

↑

[`OFF] [``J] [``H] [``t] [``n] [``E] [``C] [``d] [`Pt2] [0-50

[`rSP] [`rSP] [`rSP] [`rSP] [`rSP] [`rSP] [`rSP] [`rSP] [`rSP] [`rSP

thermocouple

RSP Input DIP RSB

123

O N

↑

[`OFF] [```r] [```S] [``b]

[`rSP] [`rSP] [`rSP] [`rSP]

thermocouple

RSP Input DIP RTD RTD(0.1°)

123

O N

↑

[`OFF] [`rtd] [`r†d]

[`rSP] [`rSP] [`rSP]

RTD

4.6 WATLOW Series 988LF Users Manual Setup Menu, Chapter 4

Setup

[`rSP]

Remote Set Point Input continued from previous page.

[`rL2] [`rH2]

If Default

↓↓

RSP Input DIP 4-20mA 0-20mA 0-5VÎ 1-5VÎ 0-10VÎ(VDC)

123

O N

↑

[`OFF] [4-20] [0-20] [`0-5] [`1-5] [0-10]

[`rSP] [`rSP] [`rSP] [`rSP] [`rSP] [`rSP]

process

(Factory Preset)

RSP Input DIP 4-20mA 0-20mA 0-5VÎ 1-5VÎ 0-10VÎ(VDC)

123

O N

↑

[`OFF] [4-20] [0-20] [`0-5] [`1-5] [0-10]

[`rSP] [`rSP] [`rSP] [`rSP] [`rSP] [`rSP]]

mV process

Range Low 2 and Range High 2

Select the low and high range for Remote Set Point Input. These prompts limit the adjustment range for the set points. The default values are the same as the limits of the sensor you selected by setting the input 2 DIP switch and selecting a value for Input 2 [`In2].

[`rL2] [`rH2]

Range Low 2 and Range High 2 continued on next page.

[`rL2] [`rH2] These prompts appear only on controllers equipped with Remote Set Point Input hardware (98 _ L-_ 2__-AA__).

present at the input.

Example: Set [`rSP] to [4-20]mA.

Set [`rL2] to [`100]. Set [`rH2] to [`500]. A 4mA input will display [`100]. A 12mA input will display [`300]. A 20mA input will display [`500].

• The low and high values of each sensor type are listed on the specifications page of the Appendix.

• Choose between Fahrenheit and Celsius at the [`C_F] prompt in the Setup Menu.

[`rL2] [`rH2] These prompts appear only if the controller is equipped with Remote Set Point Input hardware and with Remote Set Point Input [`rSP] not set to [`OFF].

Default DefaultDefault Default

↓↓ ↓↓

``°F] [`°C]

[`rL2] [`rH2] [`rL2] [`rH2]

[```J] [``32]…[1500] [```0]…`816] 98_L-1__-AA__ or [`in2] [`rL2] [`rH2] [`rL2] [`rH2] 98_L-2__-AA__

Setup Menu, Chapter 4 WATLOW Series 988LF Users Manual 4.7

Setup

[`rL2] [`rH2]

Range Low 2 and Range High 2 continued from previous page.

NOTE: These values do not affect the low or the high set point limit for process alarms.

NOTE: When high impedance [`0-50] is selected for Input 1, the range high for both [``°C] and [``°F] can be extended to [9999]. The range low, when [``°C] is selected, can be extended to [-999]

Default Default Default

↓↓ ↓↓

(K) ``°F] [`°C]

[```H] [-328]…[2500] [-200]…[1371]

[```t] [-328]…[`750] [-200]…[`399]

[```n] ``32]…[2372] [```0]…[1300]

[```E] [-328]…[1470] [-200]…[`799]

(W5)

[```C] [``32]…[4200] [```0]]]…[2316]

(W3)

[```d] [``32]…[4200] [```0]]]…[2316]

[`Pt2] [``32]…[2543 [```0]]…[1395]

high impedance

[0-50] [-999]…[[`999] [-573]…[`573]

[```r] [``32]…[3200] [```0]]…[1760] 98_L-2__-AA__ only

[```S] [``32]…[3200] [```0]…[1760]

[```b] [``32]…[3300] [```0]…[1816]

[`rtd] [-328]…[1472] [-200]…[`800]

NOTE: The range high [`rH2] value for process inputs can be extended to [9999].

[`C_F]

[`r†d] [-9(9]…[99(9] [-7#3]…[53&7]

process

[4-20] [-999]…[`999] units

[0-20] [-999]…[`999] units

[`0-5] [-999]…[`999] units

[`1-5] [-999]…[`999] units

[0-10] [-999]…[`999] units

[0-50] [-999]…[`999] units

[0=00] [-999]…[`999] units

Celsius-Fahrenheit

Select which temperature scale the controller will use.

[`C_F] This prompt appears only on controllers with either Input 1 set to something other than a process input.

Default

↓

[``°f] [``°C]

4.8 WATLOW Series 988LF Users Manual Setup Menu, Chapter 4

[`C_F] [`C_F]

Setup

[`Ot1]

[Prc1]

Output 1

Set the way that output 1 will respond to a difference between the set point and an input variable.

• [``Ht](Heat) select reverse action, so that output 1 responds when the input signal is less than the setpoint.

• [``CL](Cool) select direct action, so that output 1 responds when the input signal is more than the setpoint.

[`Ot1] This prompt always appears.

Default

↓

[``Ht] [``CL]

[`Ot1] [`Ot1]

Process 1

Select the process range for output 1.

• [Prc1] This prompt appears only on controllers equipped with output 1 process hardware (98__-__F_-___).

[`Ot2]

Default

↓

4-20mA 0-20mA 0-5VÎ 1-5VÎ 0-10VÎ (dc)

[4-20] [0-20] [`0-5] [`1-5] [0-10]

[Prc1] [Prc1] [Prc1] [Prc1] [Prc1]

Output 2

Selects the secondary output action

• [``AL] de-energizes output 2 in an alarm condition.

• [`ALn] energizes output 2 in an alarm condition.

• [``Ht](Heat) selects reverse action, so that output 2 responds when the input signal is less than the set point.

• [``CL](Cool) selects direct action, so that output 2 responds when the input signal is more than the set point.

[`Ot2] This prompt appears only on controllers equipped with output 2 hardware (not 98_L-___A-AA__).

Default

↓

[``no] [``AL] [`Aln] [``Ht] [``CL]

[`Ot2] [`Ot2] [`Ot2] [`Ot2] [`Ot2]

Setup Menu, Chapter 4 WATLOW Series 988LF Users Manual 4.9

Setup

[`ALt]

[`LAt]

Alarm Type

Selects the alarm type when Output 2 has been selected as an alarm.

• [``Pr] uses the process signal from input 1.

• [``de] uses a deviation from the input 1 signal.

[`ALt This prompt appears only on controllers equipped with output 2 hardware (not 98_L-___A-AA__). and with [`Ot2] set to [``AL] or [`ALn].

Default

↓

[``Pr] [``de]

[`ALt] [`ALt]

Latching

Select whether alarm for output 2 will be latching or non-latching. A latching alarm [`LAt] must be turned off manually. A non-latching alarm

[`nLA] turns off when an alarm condition no longer exists.

[`SIL]

[`LAt] This prompt appears only on controllers equipped with output 2

hardware (not 98_L-___A-AA__) and with [`Ot2] set to [``AL] or [`ALn].

Default

↓

[`nLA] [`LAt]

[`LAt] [`LAt]

Silencing

Select silencing to inhibit alarm for Output 2 on startup and to allow the operator to reset the alarm output, not the visual display.

• Silencing disables the alarm until the signal is between [A2LO] and [`AHI].

[`AL2] This prompt appears only on controllers equipped with output 2

hardware (not 98_L-___A-AA__) and with [`Ot2] set to [``AL] or [[`ALn].

Default

↓

[`OFF] [``On]

[[`SIL] [[`SIL]

4.10 WATLOW Series 988LF Users Manual Setup Menu, Chapter 4

Chapter 5 The Operation Menu

Navigating the Operation Menus

Operations

NOTE: Press the Display Key

∂

to return to the Display Loop from any point in any menu.

❷ Use the Up-arrow > or the Down-arrow < key to select one of the prompt values.

Figure 5.1 Navigating the Operations Menu.

PROCESS

L1 L2

DEV

% OUT

SERIES 988LF

DISPLAY

AUTO

MAN

MODE

❶ To reach the Operation Menus, begin in the Display Loop and press the Mode key µ. Depending on the controller configuration, either the Set Point 2 prompt [`SP2], or the Proportional Band, Output 1 prompt [`Pb1] will appear in the lower display. You will not see every prompt in the Operation Menu; the unit’s configuration and model number determine which prompts appear.

Enter your settings, from the controller's upper display.

MODE

[`SP2]

[`Pb1]

[`rE1]

[`rA1]

[`Ct1]

[`Pb2]

[`rE2]

[`rA2]

[`CT2]

[``dB]

[`ALO]

[`AHI]

[`CAL]

[`AUT]

[`L-r]

Set Point 2

Proportional Band 1

Reset 1

Rate 1

Cycle Time 1

Proportional Band 2

Reset 2

Rate 2

Cycle Time 2

Deadband

Alarm Lo

Alarm Hi

Calibration Offset

Auto-tune

Local-remote

Operations Menu, Chapter 5 WATLOW Series 988LF Users Manual 5.1

Operations

TLTL

PROCESS

L1 L2

DEV

% OUT

DISPLAY

SERIES 988LF

MODE

AUTO

MAN

NOTE: Decimal points may not always be in the position specified below depending on the settings in the Decimal

dECdEC

dEC

parameters in the

dECdEC

Setup Menu.

Display Prompts

❸ Use the Mode key µ to advance through the Operations Menu. You will not see every prompt in the Operations menu; the unit’s configuration and model number determine which prompts appear.

L1 L2

DEV

% OUT

SERIES 988LF

PROCESS

DISPLAY

AUTO

MAN

MODE

[`SP2]

[`Pb1]

Set Point 2

Select a second set point that will activate output 2. This allows you to boost the heating (reverse acting) or cooling (direct acting) action of the output 1 device.

• The range and default settings depend on the [`In1], [`rL1], and [`rH1] settings (Setup Menu).

[`SP2] This prompt appears only if [`Ot1] and [`Ot2] (Setup Menu) are both set to [`Ht] or [`CL].

[`rL1] … [`rH1]

[`SP2] [`SP2]

Proportional Band, Output 1

Select the proportional band for PID output 1. If set to [```0] it functions as an on/off control with a 3°F or 1.7°C switching differential for ranges displayed in whole degrees, and 0.3°F or 0.17°C for ranges displayed on 0.1°. The default is 25°F/17°C.

[`Pb1] This prompt always appears.

If Default

↓↓

[``°F] [```0] … [``25] … [9999]

[`C_F] [`Pb1] [`Pb1] [`Pb1]

(Setup Menu)

[`r†d] [``)0] [[``25] [99(9]

Input 1 [`Pb1] [`Pb1] [`Pb1]

(Setup Menu)

[``°C] [```0] … [``14] … [9999]

[`C_F] [`Pb1] [`Pb1] [`Pb1]

(Setup Menu)

[`r†d] [``)0] … ``14] … [99(9]

Input 1 [`Pb1] [`Pb1] [`Pb1]

Setup Menu)

5.2 WATLOW Series 988LF Users Manual Operations Menu, Chapter 5

Operations

[`rE1]

[`rA1]

Reset, Output 1

Tune the control action to eliminate the offset or droop between the set point and the actual process value for PID output 1.

[`rE1] This prompt appears only if [`Pb1] is set to greater than [```0].

Default

↓

[`0)0] … [99(9] repeats/min.

[`rE1] [`rE1]

Rate, Output 1

Tune the rate to eliminate overshoot on startup or after the set point changes for Output 1. The rate setting will not influence the percent

power if the process value is more than twice the proportional band from the set point.

[`RA1] This prompt appears only if [`Pb1] is set to greater than [```0].

[`Ct1]

Default

↓

[`)00] … [`(99] min.

[`rA1] [`rA1]

Cycle Time, Output 1

Select the time, in seconds, of a complete on/off cycle.

[`Ct1] This prompt appears only if [`Pb1] is set to greater than [```0]. This prompt does not appear if Output 1 is a process output.

If Default

↓↓

mechanical [``%0] … [`1)0] … [99(9] min.

relay [`Ct1] [`Ct1] [`Ct1]

outputs

open collector [brSt] [``)1] … [``!0] … [99(9] min.

or solid-state [`Ct1] [`Ct1] [`Ct1] [`Ct1]

relay outputs

Operations Menu, Chapter 5 WATLOW Series 988LF Users Manual 5.3

Operations

[`Pb2]

Proportional Band, Output 2

Select the proportional band for PID output 2. If set to [```0] it functions as an on/off control. If set to [```0] it functions as an on/off control with a 3°F or 1.7°C switching differential for ranges displayed in whole degrees, and 0.3°F or 0.17°C for ranges displayed on 0.1°. The default is 25°F/17°C.

[`Pb2] This prompt appears if Output 2 [`Ot2] (Setup Menu) is set to [``Ht] or [``CL].

If Default

↓↓

[``°F] [```0] … [``25] … [9999]

[`C_F] [`Pb2] [`Pb2] [`Pb2]

(Setup Menu)

[`r†d] [``)0] [[``25] [99(9]

Input 1 [`Pb2] [`Pb2] [`Pb2]

(Setup Menu)

[``°C] [```0] … [``17] … [9999]

[`C_F] [`Pb2] [`Pb2] [`Pb2]

(Setup Menu)

[`r†d] [``)0] … [``17] … [99(9]

Input 1 [`Pb2] [`Pb2] [`Pb2]

(Setup Menu)

[`rE2]

[`rA2]

Reset, Output 2

Tune the control action to eliminate the offset or droop between the set point and the actual process value for PID output 2.

[`rE2] This prompt appears only if [`Pb2] is set to greater than [```0].

Default

↓

[`0)0] … [99(9] repeats/min.

[`rE2] [`rE2]

Rate, Output 2

Tune the rate to eliminate overshoot on startup or after the set point changes for Output 2. The rate setting will not influence the percent

power if the process value is more than twice the proportional band from the set point.

[`RA2] This prompt appears only if [`Pb2] is set to greater than [```0].

Default

↓

[`)00] … [`(99] min.

[`rA2] [`rA2]

5.4 WATLOW Series 988LF Users Manual Operations Menu, Chapter 5

Operations

[`Ct2]

[``db]

Cycle Time, Output 2

Select the time, in seconds, of a complete on/off cycle.

[`Ct2] This prompt appears if Output 2 [`Ot2] (Setup Menu) is set to [``Ht] or [``CL], and if [`Pb2] is set to greater than [```0].

If Default

↓↓

mechanical [``%0] … [`1)0] … [99(9] min.

relay [`Ct2] [`Ct2] [`Ct2]

outputs

open collector [brSt] [``)1] … [``!0] … [99(9] min.

or solid-state

relay outputs

[`Ct2] [`Ct2] [`Ct2] [`Ct2]

Dead Band

Select the width of the zone between the action of the heating (reverse acting) output and the cooling (direct acting) output. This

shifts the cool setpoint by the dead band value entered. If you select a positive value the heat and cool outputs cannot be energized at the same time. If you select a negative value, both outputs can be energized at the same time.

If Default

↓↓

[``°F] [-999] … [```0] … [`999]

[`C_F] [``db] [``db] [``db]

(Setup Menu)

[``°C] [-555] … [```0] … [`555]

[`C_F] [``db] [``db] [``db]

a process [-999] … [```0] … [`999] units

input is selected [``db] [``db] [``db]

Operations Menu, Chapter 5 WATLOW Series 988LF Users Manual 5.5

Operations

[`AL0

Alarm Lo

Select the low trigger value for the output 2 alarm. Represents the low

process alarm or low deviation alarm.

[`ALO] This prompt appears only if [`Ot2] parameter is set to [``AL] or [`ALn].

If Default

↓↓

lowest value of

[`Pr1] value of … [`rL1] (or [`rL2])… [`AHI]

[`AL0] sensor in Setup Menu [`ALO]

range

[`dE1] [-999] … [```0]

`AL0] [`ALO] [`ALO]

[`AHI]

Alarm Hi

Select the high trigger value for the output 2 alarm. Represents the

high process alarm or high deviation alarm.

[`AHI] This prompt appears only if [`Ot2] parameter is set to [``AL] or [`ALn].

If Default

↓↓

[``Pr] [`ALO] … [`rH1] (or [`rH2]) … value of

[`AL0] [`AHI] in Setup Menu sensor

[``dE] [```0] … [`999] … [9999]

[`AL0] [[`AHI] [[`AH]1 [`AH1]

value of highest

range

5.6 WATLOW Series 988LF Users Manual Operations Menu, Chapter 5

Operations

[`CAL]

[`AUt]

NOTE: For more information on auto-tune, see Chapter

Calibration Offset

Add or subtract degrees from the input signal. This allows you to compensate for lead resistance, sensor errors, or other factors.

[`CAL] This prompt always appears.

If Default

↓↓

[-999] [```0] [9999]

[`CAL] [`CAL] [`CAL]

[`r†d] [-9(9] [```0] [99(9]

[``In] [`CAL] [`CAL] [`CAL]

Auto-tune

Initiate an auto-tune.

[`AUt] This prompt always appears.

Default

↓

[`L-r]

[`OFF] [``On]

[`CAL] [`AUt]

Local-remote

Selects a local or remote set point. With [```r] selected the controller displays the remote set point rather than the internal (local) set point, and the set point cannot be changed with the Up-arrow > or Down-arrow < key.

[`L-r] This prompt appears if [`rSP] (Setup Menu) is not equal to [`OFF].

Default

↓

[```L] [```r]

[`L-r] [`L-r]

Operations Menu, Chapter 5 WATLOW Series 988LF Users Manual 5.7

Operations

Notes

5.8 WATLOW Series 988LF Users Manual Operations Menu, Chapter 5

Chapter 6 The Factory Menus

[

Reaching the Diagnostics Menu

❶ Press the Up-arrow > and Down-arrow < keys together and hold until the [`LOC] prompt appears in the lower display. Press and hold again until the [Fcty] prompt appears in the lower display.

[diAg][`CAL]

[Fcty] [Fcty]

Diagnostics Calibration

Menu Menu p. 6.1 p 6.5

❷ Use the Up-arrow > key to step from the Calibration Menu

[`CAL] to the Diagnostics Menu [diag].

❸ Press the Mode key µ to step through the prompts.

[``no][`YES]

[diSP] [diSP]

`OFF][out1][out2]

[tout] [tout] [tout]

❹ Press the Up-arrow key > or the Down-arrow key < to select one of the prompt values.

In the Diagnostics Menu only the values of [dISP], [tout], and [OPLP] can be changed.

MODE

[Diag]

[Fcty]

[date]

[SOft]

[Sn--]

[AMB]

[Acnt]

[`gnd]

[cnt1]

[cnt2]

[ity1]

[ity2]

[Oty1]

[Oty2]

[dISP]

[tout]

[OPLP]

Factory Prompt

Factory Ship Date

Software Revision

Serial Number

Ambient Temperature

Ambient A/D count

Ground A/D count

Input 1 A/D count

Input 2 A/D count

Input 1 Module Type

Input 2 Module Type

Output 1 Module Type

Output 2 Module Type

Test Display

Test Outputs

Open Loop

Document your settings, from the controller's upper display.

Figure 6.1 The Diagnostics Menu

Factory Menus, Chapter 6 WATLOW Series 988LF Users Manual 6.1

Factory-Diagnostics

[dAtE]

[SOFt]

[Sn--]

Factory Ship Date

Shows the date that the final factory control test was performed. The first two digits represent the week as numbered from [01``] to [52``]. The second two digits represent the year [``97], [``98], etc…

[dAtE] This prompt always appears.

Software Revision

Shows the controller’s software revision code. This letter indicates the software revision of your controller; [50`d].

[SOFt] This prompt always appears.

Serial Number

Shows the controller’s serial number. The first two letters in the upper display are to indicate that the controller is in serial number mode. The right half of the upper display shows the first two digits of the serial number. The lower display shows the last four digits of the serial number.

[AMb]

[Acnt] [`gnd]

[Sn34] [5678]

This is what the controller with the serial number 0988345678 would display.

[Sn``] This prompt always appears.

Ambient Temperature

Shows the ambient temperature at the Input 1 terminals. The temperature is shown in °F in the form [00)0] regardless of the settings of

[deC1], [deC2], [`dfL], or [`C_F]. [AMb] This prompt always appears.

Factory Use Only

These prompts are used only at the factory.

[Acnt] [`gnd] [cnt1] [cnt2] These prompts always appear.

[cnt1] [cnt2]

6.2 WATLOW Series 988LF Users Manual Factory Menus, Chapter 6

Factory-Diagnostics

[ity1] [ity2]

[Oty1] [Oty2]

Inputs 1 and 2 Module Types

Displays which input module is installed in the controller. Please document this value before contacting the factory for technical assistance.

Input Types

• [none] No input module

• [``tc] Thermocouple only module

• [UOFF] Universal off

• [Urtd] Universal rtd

• [Utch] Universal high-gain thermocouple

• [UtcL] Universal low-gain thermocouple

• [UMu] Universal millivolts

• [UPrc] Universal process

[ity1] [ity2] These prompts always appear.

Outputs 1 and 2 Module Types

Displays which output module is installed in the controller. Please document this value before contacting the factory for technical assistance.

[diSP]

Output Types

• [none] no output module

• [SSr1] 0.5A solid-state relay

• [SS1S] 0.5A solid-state relay with suppression

• [``dc] switched DC output

• [rLcS] form C relay with suppression

• [Proc] process output (Output 1 only)

[Oty1] [Oty2][Oty1] [Oty2]

[Oty1] [Oty2] These prompts always appear.

[Oty1] [Oty2][Oty1] [Oty2]

Test Displays

Runs a brief test of the controller’s displays and LEDs. To run the test, scroll through the Diagnostics Menu until [disp] is shown in the lower display. Use the Up-arrow key > or Down-arrow key < to select [`YES] from the upper display and press the mode key µ.

The controller will run pattern tests, blink all the LEDs on and off, and end with the model number in both displays.

[diSP] This prompt always appears.

Default

↓

[``no] [`yes] [disp] [disp]

Factory Menus, Chapter 6 WATLOW Series 988LF Users Manual 6.3

Factory-Diagnostics

[tout]

[OPLP]

Test Outputs

This prompt tests each output. To run the test, scroll through the Diagnostics Menu until [tout] is shown in the lower display. Use the Uparrow key > or Down-arrow key < to select an output [out1] or [out2]. The LED for that output should light after a second or two indicating that the output has been successfully energized. Do not press the mode key µ to activate the test; it starts automatically when anything other than [`OFF] is selected.

If any of the LEDs fail to light contact the factory. [tout] This prompt always appears.

Default

↓

[`OFF] [out1] [out2] [tout] [tout] [tout]

Open Loop

Checks the control loop, consisting of the controller output, power control, heater and sensor. With open loop enabled, the controller moni-

tors the output power level and checks for a change in the process input value. If the output power is at maximum for a period of time equal to the reset time and the process input has not changed by at least ±5°F, the controller will switch to manual mode at 0% output power and [OPLP] will be displayed in the lower display.

To clear this error, enter the Setup Menu and press the display key ∂. To get back into auto mode, press the Auto/Man key å.

[OPLP] This prompt always appears.

Default

↓

[`OFF] [``On] [OPLP] [OPLP]

6.4 WATLOW Series 988LF Users Manual Factory Menus, Chapter 6

]

Factory-Calibration

[`CAL]]

Reaching the Calibration Menu

❶ Press the Up-arrow > and Down-arrow < keys together and hold until the [`LOC]

prompt appears in the lower display. Press and hold again until the [Fcty] prompt appears in the lower display. ❷ Use the Up-arrow key > to select the Calibration Menu [`CAL] in the upper display.

[diAg][`CAL]

[Fcty] [Fcty]

Diagnostics Calibration

Menu Menu

p. 6.1 p 6.5

❸ Press the Mode key µ to step through the prompts.

[``no][`YES

[`rSt] [`rSt]

❹ Press the Up-arrow key > or the Down- arrow key < to select one of the prompt values.

Refer to Calibrating Watlow Process Controls for information about the Calibration Menu.

CAUTION: Before attempting to calibrate, make sure you have the proper equipment called for in each procedure. The Series 988LF is calibrated and tested before it leaves the factory. Attempting to calibrate the controller without the proper equipment could result in damage to property and/or equipment.

Diagnostics Prompt

[Fcty]

MODE

[A`50]

MODE

[A`00]

MODE

[``tc]

MODE

[a`0H]

MODE

[A`20]

MODE

[A`15]

MODE

[A380]

MODE

[A10U]

MODE

[A`0U]

MODE

[A20A]

[A`4A]

[A`OU]

[A100]

[b`50]

[b`00]

MODE

Document your set from the controller' upper display.

[[b`0H]

MODE

[b`20]

MODE

[b`15]

MODE

b380]

MODE

[b10U]

MODE

[b`0U

MODE

[b20A]

MODE

[b`4A]

MODE

[b`0U]

MODE

[b100]

MODE

[1`4`]

MODE

[1`20]

MODE

[1`0`]

MODE

[1`10]

MODE

[`rSt]

Restore

Figure 6.5 The Calibration Menu

[`rSt]

Restore

Restores the original factory calibration values. This is a simple way to recover from a mistake made while calibrating the controller.

[`rSt] This prompt always appears.

Default

↓

[``no] [`yes] [`rSt] [`rSt]

Factory Menus, Chapter 6 WATLOW Series 988LF Users Manual 6.5

Notes

6.6 WATLOW Series 988LF Users Manual Factory Menus, Chapter 6

Chapter 7 Tuning, Manual Operation,

Alarms and Error Codes

Auto-tuning (Heat and/or Cool)

NOTE: A useful reference on tuning is Tuning of Industrial Control Systems by Armando B. Corripio, published by the Instrument Society of America.

Figure 7.1 Auto-tuning example

The Series 988LF can automatically tune the PID parameters to fit the characteristics of your particular thermal system.

Once the auto-tune sequence has begun, all PID values for both heat and cool are set to [```0] and the control goes into an on/off mode of control at 90% of the established set point. The displayed set point remains unchanged.

Auto-tuning at a set point of 200°F

200°

180°

Temperature

100°

auto-tune

begins

process

90% of

set point

Time

auto-tune complete

set point

CAUTION: If a mechanical relay or contactor is switching power to the load, a longer cycle time may be desirable to minimize wear on the mechanical components. The typical life of a mechanical relay is 100,000 cycles. Verify that the cycle time selected is appropriate for the output device type. Failure to do so could result in damage to equipment and/or property.

When the control finishes “learning” the system, it resumes standard PID control using the PID values established by the auto-tuning process. Changing the set point during an auto-tune restarts the auto-tune procedure.

During auto-tuning the process must cross the set point four times within an 80-minute time span for the Series 988LF to successfully complete the auto-tune. If this does not happen within the 80-minute time limit, the Series 988LF chooses PID values based on the 80-minute tuning cycle performed.

To start auto-tuning:

1. Press the Mode key µ to advance through the Operations menu until the [`AUt] prompt appears in the lower display.

2. Use the Up-arrow > or Down-arrow < key to select [``On] or [`OFF].

3. Press the Display key ¥. While the control is in the tuning mode the lower display alternates every second between the normal information and the [tunE] prompt.

Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7 WATLOW Series 988LF Users Manual 7.1

T uning

4. When tuning is complete, the displays return to their previous state and [`AUt] reverts to [`OFF]. The Series 988LF installs the PID tuning parameters it has calculated and saves them in non-volatile memory.

To abort auto-tuning either reset the [`AUt] prompt to off, press the Auto/ Man key å twice, or cycle power off and on. In all cases, aborting autotune restores all values to their state before auto-tuning began.

Manual Tuning

For optimum control performance, tune the Series 988LF to your thermal system. The tuning settings here are for a broad spectrum of applications; your system may have somewhat different requirements. NOTE: This is a slow procedure that may take hours to obtain optimum values.

NOTE: Tune heating outputs at a set point above the ambient process value. Tune cooling outputs at a set point below the ambient process value.

1. Apply power to the Series 988LF and enter a set point. Begin with

[``Pb] set to [```1]; [``rE] or [``It] set to [`0)0]; [``rA] or [``dE] set to [`0)0]; [``Ct] set to [``%0]; [`CAL] set to [```0]; and [`AUt] set to [`OFF].

2. Proportional Band Adjustment: Gradually increase [``Pb] until the upper display process value stabilizes at a constant value. The process value will not be right on set point because the initial reset value is 0.00 repeats per minute. (If [``Pb] is set to [```0] then [``rE], [``It], [``rA] and [``dE] are inoperative, and the Series 988 functions as a simple on/off control.) The [`HYS] prompt determines the switching differential value.

3. Reset/Integral Adjustment: Gradually increase [``rE] or [``It] until the upper display process value begins to oscillate or “hunt.” Then slowly decrease [``rE] or [``It] until the upper display stabilizes again near set point.

4. Cycle Time Adjustment: Set [``Ct] as required. Faster cycle times sometimes achieve the best system control. However, if a mechanical contactor or solenoid is switching power to the load, a longer cycle time may be desirable to minimize wear on the mechanical compo nents. Experiment until the cycle time is consistent with the quality of control you want. [``Ct] will not appear on units with a process output (98__-__F_-____ or 98__-___F-____).

5. Rate/Derivative Adjustment: Increase [``rA] or [``dE] to 0.10 minute. Then raise set point by 20° to 30°F, or 11° to 17°C. Observe the system’s approach to the set point. If the load process value over shoots the set point, increase [``rA] or [``dE] to 0.50 minutes.

7.2 WATLOW Series 988LF Users Manual Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7

Tuning

Raise the set point by 20° to 30°F, or 11° to 17°C and watch the ap proach to the new set point. If you increase [``rA] or [``dE] too much, the approach to set point will be very sluggish. Repeat as necessary until the system rises to the new set point without over shooting or approaching the set point too slowly.

6. Calibration Offset Adjustment: You may want your system to control to a process value other than the value coming from the input sensor. If so, measure the difference between that process value (perhaps at another point in the system) and the process value showing in the upper display. Then enter the [`CAL] offset value you want. Calibra tion offset adds or subtracts degrees from the value of the input signal.

Manual and Automatic Operation

To change from auto to manual operation, press the Auto/Man key å twice.

Manual operation provides open-loop control of the outputs from a range of

-100% to 100% output. The Series 988LF allows a negative output value only when [`Ot1] or [`Ot2] (Output Menu) is set to [``CL] (cool). Automatic operation provides closed-loop on/off or PID control. When the operator transfers from a closed loop to an open loop, the Series 988LF retains the power level from the closed loop control. When the Series 988LF returns to closed-loop control, it restores the previous set-point value.

The Auto/Man LED (located on the Auto/Man key å) indicates whether the controller is in automatic or manual operation. When the LED is lit, the control is in manual operation. When the LED is off, it is in automatic operation. When the LED flashes, press the key again within five seconds to complete the change in operation.

When a sensor opens, the controller switches from automatic to manual operation.

• If the process has stabilized at a power level less than 75% ( ± 5%) for a two-minute period prior to the sensor break, then the Series 988LF switches to manual operation at the last automatic power level. If these conditions are not met, the output goes to 0% power (output disabled).

When transferring from automatic to manual operation, the control output, or outputs, remain stable — a bumpless, or smooth, transition. When transferring from automatic to manual operation, the output value appears in the lower display. In automatic operation, the set point appears.

Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7 WATLOW Series 988LF Users Manual 7.3

Alarms

NOTE: An alarm display will be masked by an error condition or when the control is in the Calibration or Setup menus.

Using Alarms

Output 2 of the Series 988LF can function as an alarm. This is accomplished with the [`Ot2] prompt (Setup Menu). If [``Al] is selected, the output is energized in the non-alarm condition and de-energizes the output in the alarm condition. Selecting [`ALn] reverses this action: de-energizing the output in a non-alarm condition and energizing it in an alarm condition.

If the L2 LED on the front panel is lit, this indicates an alarm condition for output 2.

Once you’ve configured [`Ot2] as an alarm, select the [`ALt] prompt. At this prompt, you can select the type of alarm: process or deviation.

A process alarm sets an absolute temperature range or process value range. When the temperature or process leaves the range an alarm occurs. A process alarm is not tied to the set point.

Example: If your set point is 100°F and a process alarm high limit is set to 150°F and the low limit is set to 50°F, the high limit trips at 150°F, and the low alarm at 50°F. If you change the set point, the process alarm limits remain the same.

A deviation alarm alerts the operator when the process strays too far from the set point. The operator can enter independent high and low alarm settings. The reference for the deviation alarm is the set point. Any change in set point causes a corresponding shift in the deviation alarm. Low alarms are usually set at a negative deviation while high alarms are a positive deviation.

Example: If your set point is 100°F, a deviation alarm high limit is set to +7°F and the low limit is set to -5°F, then the high alarm trips at 107°F, and the low alarm at 95°F. If you change the set point to 130°F, the alarms follow the set point and trip at 137°F and 125°F.

Alarms can be latching or non-latching. When the alarm condition is removed, a non-latching alarm automatically clears the alarm output and alarm message, if one is present. You must manually clear a latching alarm before it will disappear.

The alarm output is indicated by the corresponding LED on the front panel: L2. There may be an alarm message flashing in the lower display. When an alarm message is displayed, it alternately flashes with the current prompt at a one-second interval in the lower display.

To clear a latching alarm, first correct the condition then press the Auto/ Man key å once.

Alarm silencing is available with all alarms. This function overrides the alarm on initial power up. On power up, the alarm message will not appear and the L2 LED and output will reflect a non-alarm condition. Silencing is active until the process has entered the safe region located between the lowand high-alarm settings. Then deviation outside this safe zone triggers an alarm. If an alarm occurs at this point, the output can be silenced by pressing the Auto/Man key å once, but the controller still displays the alarm message.

7.4 WATLOW Series 988LF Users Manual Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7

NOTE: To view the error code, press the Auto/Man key

once. The upper

display shows the error code for five seconds before returning to the

[----][----]

[----] display.

[----][----]

Error Codes

Error Code E1 and E2 Messages

Four dashes, [----], in the upper display indicate a Series 988LF error. If the control was operating with stable output values (less than 75% power and less than a 5% changeover the past 2 minutes) when the error occurred, it continues to operate at those levels on a percent-power basis ([bplS]). If output values were not stable, or the percent output was greater than 75%, the control outputs drop to 0% power (off).

[E1`1] [E2`1]: A/D underflow error The analog-to-digital (A/D) converter of the input indicated by the first number is under range. An open or reversed polarity sensor is the most likely cause. Check the sensor. Make sure the input prompt is set to the correct sensor.

PROCESS

Figure 7.5 Error Code Display

NOTE: An alarm display will be masked by an error condition or when the control is in the Calibration or Setup menus.

L1 L2 L3 L4

DEV

DISPLAY

% OUT

AUTO

MAN

MODE

SERIES 988

[E1`2] [E2`2]: Sensor under-range error The sensor at the input indicated by the first number generated a value lower than that allowed for the range of the sensor, or the analog-to-digital (A/D) converter malfunctioned. Make sure the setting for the input (Setup Menu) matches the sensor type and that the sensor range falls within the range of the process being controlled.

[E1`3] [E2`3]: Sensor over-range error The sensor at the input indicated by the first number generated a value higher than that allowed for the range of the sensor, or the analog-to-digital (A/D) converter malfunctioned. Make sure the setting for the input (Setup Menu) matches the sensor type and that the sensor range falls within the range of the process being controlled.

[E1`4] [E2`4]: A/D overflow error The analog-to-digital (A/D) converter at the input indicated by the first number is over range. An open or reversed polarity sensor is the most likely cause. Check the sensor. Make sure the input (Setup Menu) is set to the correct sensor type.

The analog-to-digital (A/D) converter input voltage may be too high to convert an A/D signal.

[`Er3]: Ambient temperature error

Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7 WATLOW Series 988LF Users Manual 7.5

Error Codes

The ambient temperature of the Series 988LF has dropped below 32°F/0°C or risen above 149°F/65°C. Calibration errors can also cause this error code. Try setting [`rSt] (Calibration Menu) to [`yES].

[`Er4]: RAM verification error An internal RAM failure has occurred. Contact the factory.

[`Er5]: Non-volatile checksum error An EEPROM checksum error was detected. Turn the power off then back on again. If this does not clear the error, contact the factory.

[OPLP]: Open-loop detect This error is not available while in the on/off mode. It is only active when

[OPLP] is set to [``On] (Diagnostics Menu).

[`Er9

An incorrect module has been installed in the control. Contact the factory.

]]

]: Configuration error

]]

Error Code Actions

• All of the above error codes except [`Er4], [`Er5] and [`Er9] will result in this condition:

• If the control was operating with stable output values (less than

75% power and less than a 5% changeover the past 2 minutes) when the error occurred, it continues to operate at those levels on a percent-power basis ([bplS]). If output values were not stable, or the percent output was greater than 75%, the control outputs drop to 0% power (off).

• To clear an error code…

• If [`Err] is set to [`nLA], the error code should clear once the

problem is corrected.

• If [`Err] is set to [`LAt], correct the problem and cycle power. You

can also clear the error by pressing both the Up-arrow > and Down-arrow < keys to enter the Setup Menu, then press the Display key ¥.

• Error codes [`Er4], [`Er5] and [`Er9] will result in these conditions:

• The control is in automatic operation with both control outputs off.

• The alarm outputs are in their alarm state (de-energized with the

LED lit).

NOTE: An alarm display will be masked by an error condition or when the control is in the Calibration or Setup menus.

7.6 WATLOW Series 988LF Users Manual Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7

• The lower display is blank.

• The upper display indicates the error code.

• All keys are inactive.

• With [`Er5], all Setup Menu prompts return to default values.

Cycle power to the control. If the error is still present contact the factory.

Notes

Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7 WATLOW Series 988LF Users Manual 7.7

Notes

7.8 WATLOW Series 988LF Users Manual Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7

Appendix

Warranty and Returns A.1 Glossary A.2 Index A.4

Warranty/Returns

Specifications A.6 Model Number A.7 Menu Overview A.8 Declaration of Conformity A.9

Total

Customer

Satisfaction

Warranty

The Watlow Series 988LF is warranted to be free of defects in material and workmanship for 36 months after delivery to the first purchaser for use, providing that the units have not been misapplied. Since Watlow has no control over their use, and sometimes misuse, we cannot guarantee against failure. Watlow's obligations hereunder, at Watlow's option, are limited to replacement, repair or refund of purchase price, and parts which upon examination prove to be defective within the warranty period specified. This warranty does not apply to damage resulting from transportation, alteration, misuse or abuse.

Watlow Controls

Returns

1. Call Watlow Customer Service, (507) 454-5300, for a Return Material Authorization (RMA) number before returning any item for repair. We need this information:

• Ship to address • Bill to address

• Contact name • Phone number

• Ship via • Your P.O. number

• Symptoms and/or special instructions

• Name and phone number of person returning

the material.

NOTE: All unit model number stemming from this

user’s manual end in “-INT,” which indicates a CE compliant product.

2. Prior approval and an RMA number, from the Customer Service Department, is needed when returning any unused product for credit. Make sure the RMA number is on the outside of the carton, and on all paperwork returned. Ship on a Freight Prepaid basis.

3. After we receive your return, we will examine it and determine the cause for your action.

Watlow Controls is a division of Watlow Electric Manufacturing Company, St. Louis, Missouri, a manufacturer of industrial electric heating products since 1922. Watlow begins with a full set of specifications and completes an industrial product that is manufactured totally in-house, in the U.S.A. Watlow products include electric heaters, sensors, controls and switching devices. The Winona operation has been designing solid state electronic control devices since 1962, and has earned the reputation as an excellent supplier to original equipment manufacturers. These OEMs depend upon Watlow Controls to provide compatibly engineered controls which they can incorporate into their products with confidence. Watlow Controls resides in a 100,000-square-foot marketing, engineering and manufacturing facility in Winona, Minnesota.

Appendix WATLOW Series 988LF Users Manual A.1

4. In cases of manufacturing defect, we will enter a repair order, replacement order, or issue credit for material. A 20-percent restocking charge is applied for all returned stock controls and accessories.

5. If the unit is unrepairable, it will be returned to you with a letter of explanation. Repair costs will not exceed 50 percent of the original cost.

Shipping Claims

When you receive your Watlow control, examine the package for any signs of external damage it may have sustained enroute. If there is apparent damage either outside the box or to its contents, make a claim with the shipper immediately. Save the original shipping carton and packing material.

Glossary

annunciator — A visual display that uses pilot lights to indicate the former or existing condition of several items in a system.

bumpless transfer — A smooth transition from auto (closed loop) to manual (open loop) operation. The control output(s) does not change during the transfer.

burst fire — A power control method that repeatedly turns on and off full AC cycles. Also called zero-cross fire, it switches close to the zero-voltage point of the AC sine wave. Variabletime-base burst fire selectively holds or transits AC cycles to achieve the desired power level.

calibration offset — An adjustment to eliminate the difference between the indicated value and the actual process value.

cascade — Control algorithm in which the output of one control loop provides the set point for another loop. The second loop, in turn, determines the control action.

closed loop — A control system that uses a sensor to measure a process variable and makes decisions based on that feedback.

cold junction — See junction, cold. cold junction compensation — Electronic means to compen-

sate for the effective temperature at the cold junction. current transformer — A transformer designed for measuring

electrical current. dead band — The range through which a variation of the

input produces no noticeable change in the output. In the dead band, specific conditions can be placed on control output actions. Operators select the dead band. It is usually above the heating proportional band and below the cooling proportional band.

default parameters — The programmed instructions that are permanently stored in the microprocessor software.

derivative — The rate of change in a process variable. Also known as rate. See PID.

DIN (Deutsche Industrial Norm) — A set of technical, scientific and dimensional standards developed in Germany. Many DIN standards have worldwide recognition.

DIN-a-mite — Watlow family of SCR power controls. droop — In proportional controllers, the difference between

set point and actual value after the system stabilizes. duty cycle — The percentage of a cycle time in which the

output is on. external signal conditioner power supply — A dc voltage

source that powers external devices.

filter —

digital filter (DF) — A filter that slows the response

of a system when inputs change unrealistically or too fast. Equivalent to a standard resistor-capacitor (RC) filter.

frequency input signal noise (noise spikes).

digital adaptive filter — A filter that rejects high heat/cool output filter — A filter that slows the

change in the response of the heat or cool output. The output responds to a step change by going to approximately 2/3 its final value within the number of scans that are set.

form A — A single-pole, single-throw relay that uses only the normally open (NO) and common contacts. These contacts close when the relay coil is energized. They open when power is removed from the coil.

form B — A single-pole, single-throw relay that uses only the normally closed (NC) and common contacts. These contacts open when the relay coil is energized. They close when power is removed from the coil.

form C — A single-pole, double-throw relay that uses the normally open (NO), normally closed (NC) and common contacts. The operator can choose to wire for a Form A or Form B contact.

hunting — Oscillation of process temperature between the set point and the process variable.

hysteresis — A change in the process variable required to reenergize the control or alarm output. Sometimes called switching differential.

integral — Control action that automatically eliminates offset, or droop, between set point and actual process temperature. See reset, automatic.

isolation — Electrical separation of sensor from high voltage circuitry. Allows use of grounded or ungrounded sensing element.

JIS (Joint Industrial Standards) — A Japanese agency that establishes and maintains standards for equipment and components. Also known as JISC (Japanese Industrial Standards Committee), its function is similar to Germany’s Deutsche Industrial Norm (DIN).

junction — The point where two dissimilar metal conductors join to form a thermocouple.

cold junction — Connection point between thermocouple metals and the electronic instrument. See reference junction.

grounded junction — Type of thermocouple probe in which the hot, or measuring junction, is an integral part of the sheath material. No electrical isolation is provided.

isolated junction — A form of thermocouple probe construction in which the measuring junction is fully enclosed in a protective sheath and electrically isolated from it. Commonly called an ungrounded junction.

reference junction — The junction in a thermocouple circuit held at a stable, known temperature (cold junction). Standard reference temperature is 32°F (0°C).

thermocouple junction — The point where the two dissimilar metal conductors join. In a typical thermocouple circuit, there is a measuring junction and a reference junction. See reference junction.

ungrounded junction — See isolated junction. linearization, square root — The extraction of a linear signal

from a nonlinear signal corresponding to the measured flow from a flow transmitter. Also called square root extraction.

A.2 WATLOW Series 988LF Users Manual Appendix

Glossary

NEMA 4X — A NEMA specification for determining resistance to moisture infiltration. This rating certifies the controller as washable and corrosion resistant.

on/off — A method of control that turns the output full on until set point is reached, and then off until the process error exceeds the hysteresis.

open loop — A control system with no sensory feedback.

output — Control signal action in response to the difference

between set point and process variable.

overshoot — The amount by which a process variable exceeds the set point before it stabilizes.

P control — Proportioning control.

PD control — Proportioning control with derivative (rate)

action.

PDR control — Proportional derivative control with manual reset, used in fast responding systems where the reset causes instabilities. With PDR control, an operator can enter a manual reset value that eliminates droop in the system.

PI control — Proportioning control with integral (automatic reset) action.

PID — Proportional, integral, derivative. A control mode with three functions: proportional action dampens the system response, integral corrects for droop, and derivative prevents overshoot and undershoot.

controls that does not recognize power outage as a limit

automatic power reset — A feature in latching limit

condition. When power is restored, the output is re-energized automatically, as long as the temperature is within limits.

manual reset — 1) A feature on a limit control that requires human intervention to return the limit to normal operation after a limit condition has occurred. 2) The adjustment of a proportional control to raise the proportional band to compensate for droop.

no key reset — A method for resetting the controller’s memory (for instance, after an EPROM change).

resistance temperature detector (RTD) — A sensor that uses the resistance temperature characteristic to measure temperature. There are two basic types of RTDs: the wire RTD, which is usually made of platinum, and the thermistor, which is made of a semiconductor material. The wire RTD is a positive temperature coefficient sensor only, while the thermistor can have either a negative or positive temperature coefficient.

retransmit output — An analog output signal that may be scaled to represent the process value or set point value.

RTD — See resistance temperature detector.

slidewire feedback — A method of controlling the position of

a valve. It uses a potentiometer to vary resistance ( ) and indicate position of the valve.

switching sensitivity — In on/off control, the temperature change necessary to change the output from full on to full off. See hysteresis.

process variable — The parameter that is controlled or measured. Typical examples are temperature, relative humidity, pressure, flow, fluid level, events, etc. The high process variable is the highest value of the process range, expressed in engineering units. The low process variable is the lowest value of the process range.

proportional band (PB) — A range in which the proportioning function of the control is active. Expressed in units, degrees or percent of span. See PID.

proportional control — A control using only the P (proportional) value of PID control.

rate band — A range in which the rate function of a controller is active. Expressed in multiples of the proportional band. See PID.

ratio — A method by which the controller measures the flow of an uncontrolled variable and uses a proportion of it to control the flow of a second variable.

reference junction — See junction.

reset — Control action that automatically eliminates offset, or

droop, between set point and actual process temperature. Also see integral.

automatic reset — The integral function of a PI or

PID temperature controller that adjusts the process temperature to the set point after the system stabilizes. The inverse of integral.

thermal system — A regulated environment that consists of a heat source, heat transfer medium or load, sensing device and a control instrument.

thermocouple (t/c) — A temperature sensing device made by joining two dissimilar metals. This junction produces an electrical voltage in proportion to the difference in temperature between the hot junction (sensing junction) and the leadwire connection to the instrument (cold junction).

thermocouple break protection — The ability of a control to detect a break in the thermocouple circuit and take a predetermined action.

three-mode control — Proportioning control with integral (reset) and derivative (rate). Also see PID.

time proportioning control — A method of controlling power by varying the on/off duty cycle of an output. This variance is proportional to the difference between the set point and the actual process temperature.

zero cross — Action that provides output switching only at or near the zero-voltage crossing points of the AC sine wave. See burst fire.

zero switching — See zero cross.

Appendix WATLOW Series 988LF Users Manual A.3

Index

%OUT LED 3.1 0-5VÎ (dc) process wiring

input 1 2.7 remote set point option 2.8 output 1 2.9

0-10VÎ (dc) process wiring

input 1 2.7 remote set point option 2.8 output 1 2.9

0-20mA process wiring

input 1 2.7 remote set point option 2.8 output 1 2.9

0-50mV (high impedance) wiring

input 1 2.7 remote set point option 2.8

1-5VÎ (dc) process wiring

input 1 2.7 remote set point option 2.8 output 1 2.9

4-20mA process wiring

input 1 2.7 remote set point option 2.8 output 1 2.9

access to panel back 2.2 AC output wiring

output 1 2.9 output 2 2.10

alarm

deviation 7.4

process 7.4 alarm display, masked 7.5 alarm high 5.6 alarm low 5.6 alarms 7.4 - 7.5 alarms, latching 7.4 alarms, non-latching 7.4 alarm silencing 7.4 ambient temperature 6.2 annunciator A.2 Auto/Manual key 3.1, 7.3 Auto/Manual LED 3.1, 7.3 auto/manual operation 7.3 automatic operation 7.3 auto-tune 5.7 auto-tuning 7.1

brackets 2.1 - 2.2 bumpless transfer 7.3

Calibration Menu 6.5 calibration offset A.2 cautions iii clearing error codes 7.6 closed loop A.2 cold junction A.2 consumer feedback iii controller chassis, removing 1.1 current transformer A.2 cycle time

output 1 5.3

output 2 5.5

date 6.2 dead band 5.5 decimal 4.6 decimal point, location of 4.2 default A.2 derivative A.2 deviation alarm 7.4 DEV LED (set point deviation) 3.1

Diagnostics Menu 6.1 - 6.4 dimensions 2.1 DIN A.2 DIP switch functions 1.1 - 1.3 DIP switch locations 1.1 - 1.3 DIP switch setting

input 1.2

lockout 1.3 display 6.3 Display Key 3.1 Display Loop 3.2 displays 3.1 documentation, maintaining ii, 6.3 Down-arrow Key 3.1 droop A.2 dual in-line package (DIP) switches 1.1 - 1.3 duty cycle A.2

error code messages 7.5 - 7.6 error code results 7.6 error codes, clearing 7.6 external signal conditioner

power supply A.2

Factory Menus 6.1 - 6.5 factory ship date 6.2 feedback iii form A A.2 form B A.2 form C A.2 front panel 3.1 front panel lockout 4.2

Glossary A.2 - A.3 ground loops 2.3

H, I

Input 1 4.3 input 1 wiring 2.7

0-5VÎ (dc) process 2.7

0-10VÎ (dc) process 2.7

0-20mA process 2.4, 2.7

0-50mV (high impedance) 2.7

1-5VÎ (dc) process 2.7

4-20mA process 2.4. 2.7

RTD (2- or 3-wire) 2.7

thermocouple 2.7 input DIP switches 1.2

0-5V 1.2

0-10V 1.2

0-20mA 1.2

0-50mV 1.2

0-50mV (high impedance) 1.2

1-5 1.2

4-20mA 1.2

RTD 1.2

thermocouple 1.2 input module 6.3 input ranges (tables)

input 1 4.4 - 4.5

remote set point option 4.7 - 4.8 input-to-output isolation 2.3 installation 2.1 - 2.2 integral A.2 isolation 2.3, A.2

JIS A.2 junctions A.2

keys 3.1

L1 (output 1) 3.1 L2 (output 2) 3.1 latching alarm 7.3 linearization A.2 local-remote 5.7 locating DIP switches 1.1 - 1.3 Lockout 4.2 lockout DIP switch 1.3 lockout level, setting 4.2 lower display 3.1

maintaining documentation ii, 6.3 manual operation 7.2 manual tuning 7.2 mechanical relay 7.1 menu lockout 4.2 Mode Key 3.1 model number ii, iii, A.7 module types 6.3 mounting 2.1 - 2.2

National Electric Code (NEC) 2.3, 2.5, 2.6 NEMA 4X seal 2.2, A.2 non-latching alarm 7.4 notes iii

on/off control A.2 Operation Menu 5.1 - 5.7 open loop 6.4, A.2 ordering information A.7 output A.2 output 1 4.9 output 1 wiring 2.9

0-5VÎ (dc) process 2.9 0-10VÎ (dc) process 2.9 0-20mA process 2.9 1-5VÎ (dc) process 2.9 4-20mA process 2.9 AC outputs 2.9

switched dc, open collector 2.9 output 2 4.9 output 2 wiring 2.10

AC outputs 2.10

switched dc, open collector 2.10 output configurations

output 1 (control) 3.1

output 2 (control or alarm) 3.1 output module types 6.3 overriding alarms 7.4 overshoot A.3

P control A.3 panel back access 2.2 panel cutouts 2.1 - 2.2 Panel Lockout Menu 4.2 PD control A.3 PDR control A.3 PI control A.3 PID control A.3 power wiring 2.3 process variable A.3 process alarm 7.4 proportional band A.3

output 1 5.2 proportioning control A.3

A.4 WATLOW Series 988LF Users Manual Appendix

Index / Prompts

Q, R

range high 1 4.4 - 4.5 range high 2 4.7 - 4.8 range low 1 4.4 - 4.5 range low 2 4.7 - 4.8 rate

output 1 5.3

output 2 5.4 rate band A.3 reference junction A.2 relay, mechanical 7.1 release tabs 1.1, 2.2 remote set point 4.6 removing controller chassis 1.1, 2.2 reset

output 1 5.3

output 2 5.4 restore 6.5 retransmit A.3 RTD A.3 RTD calibration curve 4.5 RTD input 2.3 RTD wiring

input 1 2.7

remote set point option 2.8

safety practices 2.3, 2.5, 2.6 sensor installation 2.3 sensor type

input 1 4.3 serial number 6.2 set point 2 5.2 setting DIP switches 1.1 - 1.3

input 1.2

lockout 1.3 Setup Menus 4.1 - 4.10 shipping claims A.1 silencing 4.10 silencing alarms 7.3 slidewire feedback A.3 software revision 6.2 specifications A.6 square root extraction (linearization, square root) A.2 switched dc, open collector wiring

output 1 2.9

output 2 2.10 switching sensitivity A.3

technical assistance iii, 6.3 temperature limit control protection 2.5 terminal designation stickers 2.3 test displays 6.3 test output 6.4 thermal system A.3 thermocouple 2.3, A.3 thermocouple break protection A.3 thermocouple wiring

input 1 2.7

remote set point option 2.8 three-mode control A.3 time proportioning control A.3 tuning

automatic 7.1 - 7.2

manual 7.2 Tuning of Industrial Control Systems 7.1

Up-arrow Key 3.1 upper display 3.1 using manual ii - iii

V, W

warnings iii warranty A.1 wiring 2.1, 2.3 - 2.10

input 1 2.7 input 2 2.8 output 1 2.9

output 2 2.10 wiring example 2.5 wiring safety 2.3, 2.5, 2.6

X, Y, Z

zero switching A.3

Prompt Index

[----] (error) 7.5

[Acnt] (Ambient A/D count) 6.2 [`AHI] (alarm high) 5.6 [`ALO] (alarm low) 5.6 [`ALt] (alarm type) 4.10 [AMb] (ambient temperature) 6.2 [`AUt] (auto-tune) 5.7

[bPLS] (bumpless transfer) 7.3, 7.5

[`C_F] (Celsius_Fahrenheit) 4.8 [`CAL] (calibration offset) 5.7 [`CAL] (Calibration Menu) 6.5 [`Ct1] (cycle time, output 1) 5.3 [`Ct2] (cycle time, output 2) 5.5

[DAtE] (factory ship date) 6.2 [``db] (dead band) 5.5 [`dEC] (decimal) 4.6 [dFLt] (default) 4.3 [diAg] (Diagnostics Menu) 6.1 [dISP] (test displays) 6.3

[E1`1] (A/D underflow error) 7.5 [E2`1] (A/D underflow error) 7.5 [E1`2] (sensor under-range error) 7.5 [E2`2] (sensor under-range error) 7.5 [E1`3] (sensor over-range error) 7.5 [E2`3] (sensor over-range error) 7.5 [E1`4] (A/D overflow error) 7.5 [E2`4] (A/D overflow error) 7.5 [`Er3] (ambient temperature error) 7.6 [`Er4] (RAM identification error) 7.6 [`Er5] (non-volatile checksum error) 7.6 [`Er9] (configuration error) 7.6

[Fcty] (Factory Menues) 6.1

G, H, I

[`In1] (input 1) 4.3 [itY1] (input 1 module type) 6.3 [itY2] (input 2 module type) 6.3

J, K, L

[`LAt] (latching) 4.10 [`LOC] front panel lockout) 4.2 [`L-r] (local-remote) 5.7

M, N, O

[OPLP] (open loop) 6.4, 7.6 [`Ot1] (output 1) 4.9 [`Ot2] (output 2) 4.9 [OtY1] (output 1 module type) 6.3 [OtY2] (output 2 module type) 6.3

[`Pb1] (proportional band, output 1) 5.2 [`Pb2] (proportional band, output 2) 5.4

Q, R

[`rA1] (rate, output 1) 5.3 [`rA2] (rate, output 2) 5.4 [`rE1] (reset, output 1, Pid A) 5.3 [`rE2] (reset, output 2, PID A) 5.4 [`rH1] (range high 1) 4.4 - 4.5 [`rH2] (range high 2) 4.7 - 4.8 [`rL1] (range low 1) 4.4 - 4.5 [`rL2] (range low 2) 4.7 - 4.8 [`rSP] (remote set point) 4.6 - 4.7 [`rSt] (restore) 6.5 [`rtd] (RTD calibration curve) 4.5

[`SIL] (silencing) 4.10 [``Sn] (serial number) 6.2 [SOFt] (software revision) 6.2 [`SP2] (set point 2) 5.2

T, U, V, W, X, Y, Z

[tout] (test outputs) 6.4

Appendix WATLOW Series 988LF Users Manual A.5

Specifications

(1064)

Line Voltage/Power

• 100-240Vı(ac/dc) +10%, -15%; 50/60Hz, ±5%

• 24-28Vı(ac/dc) +10%, -15%; 50/60Hz, ±5%

• Power consumption 16VA maximum

Operating Environment

• 32 to 149°F (0 to 65°C)

• 0 to 90% RH, non-condensing

Storage Temperature

• -40 to 185°F (-40 to 85°C).

Agency Approvals

• UL, C-UL File # 43684

• CE: 89/336/EEC Electromagnetic Compatibility Directive. EN 50081-2: 1994 Emissions. EN 50082-2: 1995 Immunity.

• 73/23/EEC Low-Voltage Directive. EN 61010-1: 1993 Safety.

• NEMA 4X

Terminals

• #6 compression universal head screws (tighten to 5 inch/pounds maximum), accepts 20-14 gauge wire.

Accuracy

• Calibration accuracy and sensor conformity: ±0.1% of span, ±1 LSD, 77°F ±5°F (25°C ±3°C) ambient and rated line #voltage ±10%

• Accuracy span: 1000°F (540°C) minimum

• Temperature stability: ±0.2°F/°F (0.1°C/°C) change in ambient

Mechanical

• 1⁄8 DIN panel mount, NEMA 4X (IP65 equivalent) front panel

• Overall width x height x depth

• Horizontal; 4.03" x 2.18" x 4.74", (102 mm x 55 mm x 120 mm)

• Vertical; 2.18" x 4.03" x 4.74", (55 mm x 102 mm x 120 mm)

• Depth behind panel; 4.06"(103 mm)

• Weight less than or equal to 14.0 oz (0.40kg)

Input Range

Specified temperature ranges represent the

controller's operational span.

Thermocouple

(Available with basic or universal signal

conditioner)

Type C Type D Type E -328 to 1470°F or -200 to 799°C Type J 32 to 1500°F or 0 to 816°C Type K -328 to 2500°F or -200 to 1371°C Type N 32 to 2372°F or 0 to 1300°C Type T -328 to 750°F or -200 to 399°C Pt 2

32 to 4200°F or 0 to 2316°C

32 to 2543°F or 0 to 1395°C

(Available with universal signal conditioner)

Type B 1598 to 3300°F or 870 to 1816°C Type R 32 to 3200°F or 0 to 1760°C Type S 32 to 3200°F or 0 to 1760°C

RTD Resolution (DIN or JIS) (Avail. w/universal signal conditioner)

1° (DIN) -328 to 1472°F or -200 to 800°C 1° (JIS) -328 to 1166°F or -200 to 630°C

0.1° (DIN and JIS)

-99.9 to 999.9°F or -73.3 to 537.7°C

Process (Available with universal signal conditioner)

0-50mVÎ(dc) -999 to 9999 units 0-5VÎ(dc) -999 to 9999 units 1-5VÎ(dc) -999 to 9999 units 0-10VÎ(dc) -999 to 9999 units 0-20mAÎ(dc) -999 to 9999 units 4-20mAÎ(dc) -999 to 9999 units

Output Options

• Solid state relay, 0.5A @ 24V~ (ac) min., 253V~ (ac) max., opto isolated, burst fire. With or without contact suppression.

• Open collector, switched dc signal provides a minimum turn-on voltage of 3VÎ(dc) into a minimum 500 load; maximum on voltage not greater than 32VÎ(dc) into an infinite load, isolated.

• Electromechanical relay1, Form C, 5A @ 120/ 240~ (ac), 6A @ 28VÎ(dc), 1/8 hp. @ 120V~ (ac) or 125VA @ 120V~ (ac). With or without contact suppression. Off-state output impedance with RC suppression is 20k .

• Process, 0-20mA (dc), 4-20mA (dc) into 800 maximum, 0-5VÎ(dc), 1-5VÎ(dc), or 0-10VÎ(dc) into 1k minimum1, reverse acting, isolated.

Electromechanical relays are warranted for 100,000 closures only. Solid-state switching devices are recommended for applications requiring fast cycle times or extended service life.

Not an ANSI symbol.

A.6 WATLOW Series 988LF Users Manual Appendix

Electromechanical relays warranted for 100,000 closures only. Solid state switching devices recommended for applications requiring fast cycle times or extended service life.

Model Number

Ordering Information–(1319)

To order, complete the code number to the right with the information below:

9 8 _ L - _ _ _ _ - A A _ _

Series 988LF = Single channel 1⁄8 DIN temperature /process controller, vertical or horizontal mount

Hardware

6 = 24-28Vı(ac/dc) vertical mounting 7 = 24-28Vı(ac/dc) horizontal mounting 8 = 100-240Vı(ac/dc) vertical mounting 9 = 100-240Vı(ac/dc) horizontal mounting

Software

L = Standard

#1 Input

1 = Basic thermocouple signal conditioner

(excludes tc types B, R, and S, RTD, Process inputs)

2 = Universal signal conditioner

(All inputs included - see Range Information)

#2 Input

0 = None 2 = Universal signal conditioner (Remote Set Point)

#1 Output

B = Solid state relay, Form A, 0.5A, with RC suppression C = Switched dc or open collector, isolated D = Electromechanical relay1, Form C, 5A, with RC suppression E = Electromechanical relay1, Form C, 5A,

without RC suppression

F = Universal process. 0-5VÎ(dc),

1-5VÎ(dc), 0-10Îdc, 0-20mAÎ(dc), 4-20mAÎ(dc), isolated

K = Solid state relay, Form A, 0.5A, without RC suppression

#2 Output

A = None B = Solid state relay, Form A, 0.5A, with RC suppression C = Switched dc or open collector, isolated D = Electromechanical relay1, Form C, 5A, with RC suppression E = Electromechanical relay1, Form C, 5A, without contact

suppression

K = Solid state relay, Form A, 0.5A, without contact suppression

Display/Overlay

GG = Green/Green display GR = Green/Red display RG = Red/Green display RR = Red/Red display

NOTE: User documentation may be available in French, German, Spanish, Italian and Dutch, as well as English. Check Watlow’ s website (www .watlow .com/) for availability. Specify language at time of order.

Appendix WATLOW Series 988LF Users Manual A.7

Menu Overview

Figure A.8The Series 988LF Map

NOTE: This is a complete listing of all Series 988LF prompts.

Not all prompts will appear on your control. They are dependent on your configuration and model number.

To Navigate:

Press ∂ to return to the Display Loop from any location and to advance through the Display Loop.

Press > or < to move between the menus.

Display Loop (Lower Display)

Operation Menu

SP2 Pb1 rE1 rA1

Ct1 Pb2 rE2 rA2 Ct2 db ALO AHI CAL AUt

L-r

Factory Menus

Press µ to exit any menu and reach the Display Loop at any time.

Press µ to advance to the

75 50 °F0

Set point or Remote set point

Setup Menu

Operation Menu.

(Operation)

( )

Set point 2

( )

Proportional band 1

( )

Reset 1

( )

Rate 1

( )

Cycle time 1

( )

Proportional band

( )

Reset 2

( )

Rate 2

( )

Cycle time 2

( )

Deadband

( )

Alarm Lo

( )

Alarm Hi

( )

Calibration offset

( )

Auto-tune

( )

Local-remote

At the Setup Menu, press > and < another 3 seconds to enter the Factory Menus.

( )

Fcty

Factory

% OUT LED onDEV LED on Process units

Press > and < for 3 seconds to enter the Setup Menu.

(Setup)

LOC

( )

Lock

In1

( )

Input 1

( )

rL1 rH1 rtd dEC rSP rL2 rH2 C_F Ot1 Ot2 ALt LAt SIL

Range low 1

( )

Range high 1

( )

RTD calibration curve

( )

Decimal

( )

Remote set point

( )

Range low 2

( )

Range high 2

( )

C or F

( )

Output 1

( )

Output 2

( )

Alarm type

( )

Latching

( )

Silencing

Press µ to advance through a menu.

Hold µ while pressing > to move backwards through the menus.

Press > or < to select prompt values.

(diAg)

( )

dAtE

( )

SOFt Sn

( ) ( )

AMb Acnt

( )

gnd

( )

cnt1

( ) ( )

cnt2

( )

ity1

( )

ity2

( )

Oty1

( )

Oty2

( )

dISP

( )

tout OPLP ( )

(Diagnostics)

Factory ship date Software revision

Serial number

Ambient temperatur Ambient A/D count Ground A/D count

Input 1 A/D count Input 2 A/D count Input 1 module Input 2 module Output 1 module Output 2 module Test displays Test output Open loop

(CAL)

A 50 A 00 t c A 0H A 20 A 15 A380 A10U

A 0U A20A

A 4A A 0U A100

b 50

(Calibration)

( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )

b 00 b 0H

b 20

b 15 b380 b10U b 0U b20A b 4A b 0U b100 1 4 1 20 1 0 1 10 rSt

( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )

Restore factory values

A.8 WATLOW Series 988LF Users Manual Appendix

Declaration of Conformity

________________________________________

Declaration of Conformity

Series 986, 987, 988, 989

WATLOW CONTROLS 1241 Bundy Boulevard Winona, Minnesota 55987 USA

Declares that the following product:

Designation: Series 986, 987, 988, 989 Model Number(s): 9 8 (6, 7, 8 or 9) (Any letter) - (1 or 2) (0 1 2 3 4 or 5)

Classification: Control, Installation Category II, Polution Degree II Rated Voltage: 100 to 240V~ Rated Frequency: 50/60 Hz

Rated Power Consumption: 16VA maximum Meets the essential requirements of the following European Union Directive(s) using the relevant section(s) of the normalized standards and related documents shown:

89/336/EEC Electromagnetic Compatibility Directive

EN 50082-2: 1995 EMC Generic immunity standard, Part 2: Industrial

EN 61000-4-2: 1995 Electrostatic discharge EN 61000-4-4: 1995 Electical fast transients EN 61000-4-3: 1996 Radiated immunity EN 61000-4-6: 1996 Conducted immunity ENV 50204: 1995 Cellular phone

EN 50081-2: 1994 EMC Generic emission standard, Part 2: Industrial

EN 55011: 1991 Limits and methods of measurement of radio disturbance

EN 61000-3-2: 1995 Limits for harmonic current emissions EN 61000-3-3: 1995 Limitations of voltage fluctuations and flicker

EN 61010-1: 1993 Safety requirements for electrical equipment for

Déclare que le produit suivant :

Désignation : Série 986, 987, 988, 989

Numéro(s) de modèle(s) : 98 (6, 7, 8 ou 9) (lettre quelconque) - (1 ou 2) (0, 1, 2,

Classification : Commande, installation catégorie II, degré de

T ension nominale : 100 à 240 V ~

Fréquence nominale : 50/60 Hz

Consommation

d’alimentation nominale : 16 VA maximum Conforme aux exigences de la (ou des) directive(s) suivantes de l’Union Européenne figurant aux sections correspondantes des normes et documents associés ci-dessous :

89/336/EEC Directive de compatibilité électromagnétique

EN 50082-2 : 1995 Norme générique d’insensibilité électromagnétique,

EN 61000-4-2 : 1995 Décharge électrostatique EN 61000-4-4 : 1995 Courants électriques transitoires rapides EN 61000-4-3: 1996 Insensibilité à l’énergie rayonnée EN 61000-4-6: 1996 Insensibilité à l’énergie par conduction ENV 50204 : 1995 Téléphone cellulaire

EN 50081-2 : 1994 Norme générique sur les émissions électromagnétiques,

EN 55011 : 1991 Limites et méthodes de mesure des caractéristiques

EN 61000-3-2 : 1995 Limites d’émission d’harmoniques EN 61000-3-3 : 1995 Limitations d’écarts de tension et de papillotement

73/23/EEC Directive liée aux basses tensions

EN 61010-1 : 1993 Exigences de sécurité pour le matériel électrique de

(1230)

(B C D E F or K) (A B C D E F K or T) - (A B C J K M N or T) (A B C D E K R S or T) (Any two letters)

24 to 28V‡

environment

characteristics of industrial, scientific and medical radiofrequency equipment (Group 1, Class A)

73/23/EEC Low-Voltage Directive

measurement, control, and laboratory use, Part 1: General requirements

3, 4 ou 5) (B, C, D, E, F ou K) (A, B, C, D, E, F, K ou T) - (A, B, C, J, K, M, N ou T) (A, B, C, D, E, K, R, S, ou T) (deux lettres quelconques)

pollution II

Partie 2 : Environnement industriel

d’interférences du matériel radiofréquence industriel, scientifique et médical (Groupe 1, Classe A)

mesure, commande et de laboratoire, Partie 1 : Exigences générales

24 à 28 V ‡

English

Français

Erklärt, daß das folgende Produkt:

Beschreibung: Serie 986, 987, 988, 989 Modellnummer(n): 9 8 (6 7 8 oder 9) (beliebiger Buchstabe) - (1 oder 2)

Klassifikation: Regelsystem, Installationskategorie II, Emissionsgrad II Nennspannung: 100 bis 240 V~ Nennfrequenz: 50/60 Hz

Stromverbrauch: Max. 16 VA Erfüllt die wichtigsten Normen der folgenden Anweisung(en) der Europäischen Union unter Verwendung der untenstehenden einschlägigen Dokumente:

(0 1 2 3 4 oder 5) (B C D E F oder K) (A B C D E F K oder T) - (A B C J K M N oder T) (A B C D E K R S oder T) (2 beliebige Buchstaben)

oder

24 bis 28 V‡

Deutsch

89/336/EEC Elektromagnetische Übereinstimmungsanweisung

EN 50082-2: 1995 EMC-Rahmennorm für Störsicherheit, Teil 2: Industrielle

EN 61000-4-2: 1995 Elektrostatische Entladung EN 61000-4-4: 1995 Elektrische schnelle Stöße EN 61000-4-3: 1996 Strahlungsimmunität EN 61000-4-6: 1996 Leitungsimmunität ENV 50204: 1995 Mobiltelefon

EN 50081-2: 1994 EMC-Rahmennorm für Emissionen, Teil 2: Industrielle

EN 55011: 1991 Beschränkungen und Methoden der Messung von

EN 61000-3-2: 1995 Grenzen der Oberwellenstromemissionen EN 61000-3-3: 1995 Grenzen der Spannungsschwankungen und Flimmern

Umwelt

Funkstörungsmerkmalen industrieller, wissenschaftlicher und medizinischer Hochfrequenzgeräte (Gruppe 1, Klasse A)

72/23/EEC Niederspannungsrichtlinie zu entsprechen

EN 61010-1: 1993 Sicherheitsrichtlinien für Elektrogeräte zur Messung, zur

Declara que el producto siguiente:

Designación: Series 986, 987, 988, 989

Números de modelo: 9 8 (6 7 8 ó 9)(Cualquier letra) - (1 ó 2)(0 1 2 3 4 ó

Clasificación: Control, categoría de instalación II, grado de

Tensión nominal: 100 a 240 V~

Frecuencia nominal: 50/60 Hz

Consumo nominal

de energía: 16 VA máximo Cumple con los requisitos esenciales de las siguientes directivas de la Unión

Europea, usando las secciones pertinentes de las reglas normalizadas y los documentos relacionados que se muestran:

Steuerung und im Labor, Teil 1: Allgemeine Richtlinien

Español

5)(B C D E F o K)(A B C D E F K o T) - (A B C J K M N o T)(A B C D E K R S o T)(Cualquier combinación de dos letras)

contaminación ambiental II

24 a 28V ‡

89/336/EEC - Directiva de compatibilidad electromagnética

EN 50082-2: 1995 Norma de inmunidad genérica del EMC, parte 2:

EN 61000-4-2: 1995 Descarga electrostática EN 61000-4-4: 1995 Perturbaciones transitorias eléctricas rápidas EN 61000-4-3: 1996 Inmunidad radiada EN 61000-4-6: 1996 Inmunidad conducida ENV 50204: 1995 Teléfono portátil

EN 50081-2: 1994 Norma de emisión genérica del EMC, parte 2: Ambiente

EN 55011: 1991 Límites y métodos de medición de características de

EN 61000-3-2: 1995 Límites para emisiones de corriente armónica EN 61000-3-3: 1995 Limitaciones de fluctuaciones del voltaje

Ambiente industrial

industrial

perturbaciones de radio correspondientes a equipos de radiofrecuencia industriales, científicos y médicos (Grupo 1, Clase A)

73/23/EEC Directiva de baja tensión

EN 61010-1: 1993 Requerimientos de seguridad para equipos eléctricos

Erwin D. Lowell Winona, Minnesota, USA Name of Authorized Representative Place of Issue

General Manager January 9, 1996 Title of Authorized Representative Date of Issue

Signature of Authorized Representative

de medición, control y uso en laboratorios, Parte 1: Requerimientos generales

Watlow Series 988LF User’s Manual

Watlow Controls, 1241 Bundy Boulevard., P.O. Box 5580, Winona, Minnesota USA 55987-5580

Phone: (507) 454-5300, Fax: (507) 452-4507 http://www.watlow.com

Watlow 989LF Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Series 988LF

Table of Contents

Introduction

Using this Manual

Document Every Step

Notes, Cautions and Warnings

Technical Assistance

We Value Your Feedback

Chapter 1 Hardware Setup

DIP Switch Locations and Functions

Chapter 2 Installation and Wiring

Installing the Series 988LF

Wiring the Series 988LF

Wiring 0-20 and 4-20mA Process Inputs

Wiring Example

Wiring Notes

Input 1 Wiring

Input 2 Wiring

Output 1 Wiring

Output 2 Wiring

Chapter 3 Front Panel and Display Loop

Keys and Displays

Display Loop

Chapter 4 The Setup Menu

Navigating the Setup Menu

Setup Prompts

Front Panel Lockout

Input 1

Range Low and Range High

RTD Calibration Curve

Decimal

Remote Set Point Input

Range Low 2 and Range High 2

Celsius-Fahrenheit

Output 1

Process 1

Output 2

Alarm Type

Latching

Silencing

Chapter 5 The Operation Menu

Navigating the Operation Menus

Display Prompts

Set Point 2

Proportional Band, Output 1

Reset, Output 1

Rate, Output 1

Cycle Time, Output 1

Proportional Band, Output 2

Reset, Output 2

Rate, Output 2

Cycle Time, Output 2

Dead Band

Alarm Lo

Alarm Hi

Calibration Offset

Auto-tune

Local-remote

Chapter 6 The Factory Menus

Reaching the Diagnostics Menu

Factory Ship Date

Software Revision

Serial Number

Ambient Temperature

Factory Use Only

Inputs 1 and 2 Module Types

Outputs 1 and 2 Module Types

Test Displays

Test Outputs

Open Loop

Reaching the Calibration Menu

Restore

Chapter 7 Tuning, Manual Operation,

Auto-tuning (Heat and/or Cool)

Manual Tuning

Manual and Automatic Operation