Watlow 999 Operating Manual

4 (1)

Series 998

User’s Manual

Dual Channel, 1/8 DIN, Microprocessor-Based

Temperature/Process Controller

User Levels:

 

 

• New User...........................

go to Introduction

 

• Experienced User...................

go to page 4.1

 

• Expert User.............................

go to page 4.1

 

Installers:

 

TOTAL

• Set-up

go to page 1.1

CUSTOMER

• Installation & Wiring

go to page 2.1

SATISFACTION

 

 

 

 

3YearWarranty

 

 

ISO 9001

 

 

Registered Company

 

 

Winona, Minnesota USA

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

0600-0010-000 Rev G

$10.00

February 2000

Made in the U.S.A.

Supersedes: W998-XUMN Rev F

 

NOTE:

Details of a “Note” appear here in the narrow box on the outside of each page.

CAUTION:

Details of a “Caution” appear here in the narrow box on the outside of each page.

WARNING:

Details of a “Warning” appear here in the narrow box on the outside of each page.

Using the Manual

Safety Information

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 safety alert symbol, ç, (an exclamation point in a triangle) precedes a general CAUTION or WARNING 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.

Your Feedback

Your comments or suggestions on this manual are welcome, please send them to: Technical Writer, Watlow Controls, P.O. Box 5580, Winona, MN 55987-5580, Phone: (507) 454-5300, Fax: (507) 452-4507. The Series 998 User’s Manual is copyrighted by Watlow Winona, Inc., © February 2000, with all rights reserved. (1832)

Table of Contents

Introduction

Starting Out with the Watlow Series 998

iThe Series 998

iiDisplay Loop

iiOperation Menus

iiiSetup Menus

iii Factory Menus

Chapter 1

Hardware Setup

1.1DIP Switch Locations and Functions

1.2Input Type DIP Switches

1.3External Power Supply DIP Switches

1.4Setting the Lockout DIP Switch

Chapter 2

Installation and Wiring

2.1Panel Cutout and Dimensions

2.2Installing the Series 998

2.4Wiring the Series 998

2.4Power Wiring

2.4Sensor Installation Guidelines

2.5Event Input 1 Wiring

2.5Wiring 0-20mA and 4-20mA Process Inputs

2.6Wiring Example

2.7Wiring Notes

2.8Channel A Input Wiring

2.9Channel B Input Wiring

2.10Channel A Output Wiring

2.11Channel B Output Wiring

2.12Output 3 Wiring

2.13Output 4 Wiring

Chapter 3

Keys and Displays

3.1Keys and Displays

3.2Display Key and Loop

Chapter 4

The Setup Menus

4.1Navigating the Setup Menus

4.2Input Menu

4.16 Output Menu

4.32 Global Menu

Chapter 5

The Operation Menus

5.1Navigating the Operation Menus

5.2The System Menu

5.3The Set Point Menu

5.3System Prompts

5.8 PID A Menu

5.13 PID B Menu

Chapter 6

The Factory Menus

6.1Navigating the Factory Menus

6.2Panel Lockout Menu

6.8 Diagnostics Menu

6.14 Calibration Menu

Chapter 7

Tuning, Manual Operation, Alarms and

Error Codes

7.1Auto-tuning (Heat and/or Cool)

7.2Manual Tuning

7.3Manual and Automatic Operation

7.4Changing the Output 3 Alarm Jumper

7.4Using Alarms

7.6Error Code E1 and E2 Messages

7.7Error Code Actions

Chapter 8

Applications

8.1Burst Fired, Zero Cross Output

8.2Retransmit

8.3Dead Band

8.3Transmitter Power Supply

Appendix

A.1

Warranty and Returns

A.2

Glossary

A.5

Index

A.7

Prompt Index

A.8

Specifications

A.9

Ordering Information

A.10

Declaration of Conformity

Table of Contents

WATLOW Series 998 User’s Manual

Notes

WATLOW Series 998 User’s Manual

Table of Contents

Introduction

Starting Out With the Watlow Series 998

Figure i -

The Series 998.

Channel A Input

(Input 1)

Channel B Input

(Input 2)

Event Input

 

WATL W

PROCESS

 

1A

2A

1B

2B

CH A

 

DISPLAY

CH B

 

 

 

 

 

 

AUTO

 

 

MAN

 

 

MODE

SERIES 998

 

 

Channel A Control Outputs (Output 1A and 2A)

Channel B Control Outputs (Output 1B and 2B)

Optional Outputs 3 and 4 (alarms, retransmit or PC communications)

Watlow’s Series 998 process controller is capable of two independent channels of process control. Each channel can be configured and tuned separately. Each alarm option (outputs 3 and 4) can be used to trigger an alarm based on either channel. The retransmit option, available on output 3, can be used to retransmit the process or set point value of either channel. The digital communications option can be used to configure and monitor the controller with a personal computer from a remote location.

If you are unfamiliar with general controller operation, it’s a good idea to read through the entire manual. The manual is organized in setup order, with chapters on wiring, menus, operation and applications. If you understand the concept of process/temperature controls and feel comfortable skipping around through the manual, use the black tabs at the top of each page to quickly scan the pages and find the topic needed. The Menu Overview on the next page is a great place to start. Also, refer to Chapter 3 for information on the keys and displays.

The menu map is an overview of all menus and prompts and how to navigate between them. There are three main menu sets: Setup menus [`SEt]; Operation menus [OPEr]; and Factory menus [Fcty]. You can return to the Display Loop from anywhere by pressing the Display key. DIP switch locations and settings are explained later in Chapter 1.

Introduction

WATLOW Series 998 User’s Manual

i

Introduction

Display Loop

Channel A

Channel B

Channel A

 

 

 

Process

 

Process

 

Process

 

 

 

[`75]

 

 

[`80]

 

[`75]

 

 

 

[```]

 

 

 

[100]

 

[125]

 

[`80]

 

 

 

[`°F]

 

 

 

 

 

 

 

 

 

Channel A

Channel B

Channel B

 

 

Process

Set Point

 

Set Point

 

Process

 

 

Units

From the Display Loop, press the Mode key µ to reach the Operation menus.

To return to the Display Loop from any point in any menu, press the

Display key .

From the Display Loop, press both the Up-arrow and Down-arrow keys > and < for three seconds to reach the Setup menus. Hold them down for another three seconds to reach the Factory menus.

Operation Menus

[`998]

[SP2A] Set Point 2A

[`998]

[SP2b] Set Point 2B

>

 

 

[`SyS]System Menu

 

>

 

 

[PiDA] PID A Menu

 

>

 

 

 

[PiDb] PID B Menu

 

 

 

 

 

 

 

[OPEr] Operation Menus

[Oper Operation Menus

 

 

 

 

[OPEr] Operation Menus

 

 

[Ei1S] Event Input 1 Status

[PB1A] Output 1 Proportional Band A

 

 

[Pb1b] Output 1 Proportional Band B

µ

 

 

 

[Ot3S] Output 3 Status

 

µ

 

[rE1A] Output 1 Reset A

 

 

µ

[rE1b] Output 1 Reset B

 

 

 

 

 

 

 

 

[Ot4S] Output 4 Status

 

 

 

 

 

[It1A] Output 1 Integral A

 

 

 

 

[It1b] Output 1 Integral B

 

 

[A3LO] Alarm 3

Low

 

 

 

 

 

[rA1A] Output 1 Rate A

 

 

 

 

[RA1b] Output 1 Rate B

 

 

[A3HI] Alarm 3

High

 

 

 

 

 

[dE1A] Output 1 Derivative A

 

 

 

 

[dE1b] Output 1 Derivative B

 

 

[A4LO] Alarm 4

Low

 

 

 

 

 

[Ct1A] Output 1 Cycle Time A

 

 

 

 

[Ct1b] Output 1 Cycle Time B

 

 

[A4HI] Alarm 4

High

 

 

 

 

 

[Pb2A] Output 2 Proportional Band A

 

 

[Pb2b] Output 2 Proportional Band B

 

 

[`AUt] Auto-tune

 

 

 

 

 

[rE2A] Output 2 Reset A

 

 

 

 

[rE2b] Output 2 Reset B

 

 

 

 

 

 

 

 

 

 

[It2A] Output 2

Integral A

 

 

 

 

[It2b] Output 2

Integral B

 

 

 

 

 

 

 

 

 

 

[rA2A] Output 2

Rate A

 

 

 

 

[rA2b] Output 2

Rate B

 

 

 

 

 

 

 

 

 

 

[dE2A] Output 2

Derivative A

 

 

 

 

[dE2b] Output 2

Derivative B

 

 

 

 

 

 

 

 

 

 

[Ct2A] Output 2

Cycle Time A

 

 

 

 

[Ct2b] Output 2

Cycle Time B

 

 

 

 

 

 

 

 

 

 

[db`A] Dead Band A

 

 

 

 

[db`b] Dead Band B

ii

WATLOW Series 998 User’s Manual

Introduction

Introduction

From the Setup menus, press both the Up-arrow and Down-arrow keys > and < for three seconds to reach the Factory menus.

To return to the Display Loop from any point in any menu, press the Display key

.

Setup Menus

 

[InPt] Input Menu

>

 

 

 

[`SEt] Setup Menus

 

 

 

 

 

 

 

µ

[`In1] Input 1

 

 

µ

 

[dEC1] Decimal 1

 

 

 

 

[`rL1] Range Low 1

 

 

 

 

[`rH1] Range High 1

 

 

 

 

[CAL1] Calibration Offset 1

 

[rtd1] RTD Calibration Curve 1

 

[Ftr1] Input 1 Software Filter

 

[`In2] Input 2

 

 

 

 

 

[dEC2] Decimal 2

 

 

 

 

[`rL2] Range Low 2

 

 

 

 

[`rH2] Range High 2

 

 

 

 

[CAL2] Calibration Offset 2

 

[rtd2] RTD Calibration Curve 2

 

[Ftr2] Input 2

Software Filter

 

[Lin2] Input 2

Linearization

[`Alt] Altitude

>

[OtPt]Output Menu >[gLbl]Global Menu >

[`SEt] Setup Menus

 

[`Set] Setup Menus

[Ot1A] Output 1A

 

 

µ

[`C_F] Celsius-Fahrenheit

µ

[HY1A] Hysteresis 1A

 

[FAIL] Failure Mode

[Ot2A] Output 2A

 

[`err] Error Latching

[HY2A] Hysteresis 2A

 

[`Ei1] Event Input 1

[PrcA] Process A

 

[Anun] Annunciator

[Ot1b] Output 1B

 

[AtSP] Auto-tune Set Point

[HY1b] Hysteresis 1B

 

[rP`A] Ramping Channel A

[Ot2b] Output 2B

 

[rt`A] Ramp Rate Channel A

[HY2b] Hysteresis 2B

 

[rP`b] Ramping Channel B

[Prcb] Process B

 

[rt`b] Ramp Rate Channel B

[`Ot3] Output 3

 

 

 

[`Al3] Alarm 3

 

 

 

[HYS3] Hysteresis 3

 

 

 

[LAt3] Latching 3

 

 

 

[SIL3] Silencing 3

 

 

 

[`Ot4] Output 4

 

 

 

[`AL4] Alarm 4

 

 

 

[HYS4] Hysteresis 4

 

 

 

[LAt4] Latching 4

 

 

 

[SIL4] Silencing 4

 

 

 

[Aout] Analog Output

 

 

 

[Prc3] Process 3

 

 

 

[`ArL] Retransmit Low Limit [`ArH] Retransmit High Limit [ACAL] Retransmit Calibration Offset

[COM] Communications Menu

[`SEt] Setup Menus

[bAUd] Baud Rate

[dAtA] Data Bits and Parity [Prot] Protocol Type [Addr] Address

[IntF] Interface Type

Factory Menus

>

 

[PLOC] Panel Lockout Menu

>

 

[diAg] Diagnostics Menu

>

 

[`CAL] Calibration Menu

 

[Fcty] Factory Menus

 

 

 

 

[Fcty Factory Menus

 

 

 

[Fcty] Factory Menus

 

 

 

 

 

 

 

µ

[`LOC] User Lockout

 

µ

 

[dAtE] Factory Ship Date

 

µ

[A`50]

 

 

 

[`SYS] System Menu Lockout

 

 

 

 

[SOFt] Software Revision

 

 

 

[A`00]

 

[b380]

 

[PidA] PID A Menu Lockout

 

 

 

 

[Sn--] Serial Number

 

 

 

 

 

 

 

 

 

 

 

 

 

[``tc]

µ

[b10U]

 

[Pidb] PID B Menu Lockout

 

 

 

 

[AMb] Ambient Temperature

 

 

 

[a`OH]

 

[b`OU]

 

[InPt] Input Menu Lockout

 

 

 

 

[`gnd] Ground A/D Count

 

 

 

[A`20]

 

[b`4A]

 

[OtPt] Output Menu Lockout

 

 

 

 

[`rEF] Ambient A/D Count

 

 

 

[A`15]

 

[b`Ou]

 

[gLbL] Global Menu Lockout

 

 

 

 

[cnt1] Input 1 A/D Count

 

 

 

[A380]

 

[b100]

 

[COM] Communications Menu Lockout

[cnt2] Input 2 A/D Count

 

 

 

[A10U]

[1`4`]

 

[diAg] Diagnostics Menu Lockout

[itY1] Input 1 Module

 

 

 

[A`OU]

[1`20]

 

[`CAL] Calibration Menu Lockout

 

 

 

 

[ity2] Input 2 Module

 

 

 

[A20A]

[1`10]

 

 

 

 

 

 

[OtY1] Output 1 Module

 

 

 

[A`4A]

[110`]

 

 

 

 

 

 

[OtY2] Output 2 Module

 

 

 

[A`Ou]

[2`4`]

 

 

 

 

 

 

[OtY3] Output 3 Module

 

 

 

[A100]

[2`20]

 

 

 

 

 

 

[OtY4] Output 4 Module

 

 

 

[b`50]

[2`0`]

 

 

 

 

 

 

[dISP] Test Displays

 

 

 

[b`00]

[2`10]

 

 

 

 

 

 

[tout] Test Outputs

 

 

 

[b`OH]

 

[3`LO]

 

 

 

 

 

 

 

 

 

 

[b`20]

 

[3`HI]

 

 

 

 

 

 

 

 

 

 

[b`15]

 

[`rSt] Restore Factory Values

 

 

 

 

 

 

 

 

 

 

 

 

[`dFL] Default Prompts

Introduction

WATLOW Series 998 User’s Manual

iii

Notes

iv

WATLOW Series 998 User’s Manual

Introduction

Chapter 1 Hardware Setup

DIP Switch Locations and Functions

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

The Watlow Series 998 has at least one and as many as six dual in-line package (DIP) switches inside the controller, depending on the model number. They allow users to configure the controller for a variety of input sensors, to provide power for external signal conditioners 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.

 

 

WATL W

 

 

PROCESS

 

 

Release

1A

2A

1B

2B

Release

Tabs

Tabs

CH A

 

 

 

 

 

DISPLAY

 

 

CH B

 

 

 

 

 

 

 

 

 

 

AUTO

 

 

 

 

MAN

 

 

 

 

MODE

 

 

SERIES 998

 

 

 

Release

Tabs

WATLW

DSPY

MODE

PROCESS

 

CH A

AUTO

CH B

MAN

1A 2A 1B 2B

SERIES 998

Release

Tabs

Hardware Setup, Chapter 1

WATLOW Series 998 User’s Manual

1.1

DIP Switches

˜

NOTE:

The input 2 DIP switch is mounted upside down.

˜

NOTE:

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

Figure 1.2 -

Input DIP switches.

1 - Set the input DIP switches to match the sensors you are using in your application. Only controllers with model number 99__- 22__-____ have input DIP switches.

Input 2 DIP

(Channel B)

DIP

Input 1 DIP

(Channel A)

DIP

ON

ON

Controller Chassis

Rear View

 

Input 1 (Channel A)

Input 2 (Channel B)

 

(99__-2___-____)

(99__-_2__-____)

 

 

O 1

2

3

 

 

 

 

 

N

 

 

 

 

 

 

N

 

 

 

 

 

 

 

 

O

RTD

 

 

 

 

3

2

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O

1

2

3

 

 

 

 

 

 

 

 

 

 

 

N

 

 

N

 

 

 

3

2

1

O

thermocouple: R, S or B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O

1

2

3

 

 

 

 

 

 

 

 

 

 

 

N

 

 

N

 

 

 

3

2

1

O

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O

1

2

3

 

 

 

 

 

 

 

 

 

 

 

N

 

 

N

 

 

 

3

2

1

O

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.2

WATLOW Series 998 User’s Manual

Hardware Setup, Chapter 1

NOTE:

For other voltages or current settings contact the factory.

NOTE:

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

Figure 1.3 - External signal conditioner power supply DIPs.

DIP Switches

2 - Set DIP switches for outputs equipped with an external signal conditioner power supply. Only controllers with model number 99__-____-T___ or 99__-____-_T__ have an external signal conditioner power supply.

 

 

ON

Lockout

 

 

DIP

 

 

 

 

OFF

OFF

ON

Output 4

Option Board and Dip

Output 3

 

Option Board and Dip OFF

ON

Control Chassis

Top View (996 & 998)

Left-side View (997 & 999)

 

Output 3

Output 4

 

(99__-____-T___)

(99__-____-_T__)

 

O 1

2

O 1

2

 

N

 

N

 

20V ± 5% @ 30mA

 

 

 

 

 

 

 

O 1

2

O 1

2

 

N

 

N

 

12V ± 5% @ 30mA

 

 

 

 

 

 

 

O 1

2

O 1

2

 

N

 

N

 

5V ± 5% @ 30mA

 

 

 

 

 

 

3 - When the DIP switches are set, gently insert the controller chassis into the case and push it firmly into place until all four tabs snap into place.

Hardware Setup, Chapter 1

WATLOW Series 998 User’s Manual

1.3

DIP Switches

ç

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.

4 - The lockout DIP switch hides the Setup Menus (Input, Output, Global and Communications) and the Factory Menus (Panel Lockout, Diagnostics and Calibration). All units have a lockout DIP switch.

All controllers leave the factory with both switches set to off.

ON

Lockout

DIP

OFF

Control Chassis

Top View (996 & 998)

Left-side View (997 & 999)

Figure 1.4 - Lockout DIP switch.

 

 

O 1

2

 

O 1

2

 

 

N

 

 

N

 

no hardware lockout

 

 

or

 

 

 

 

 

 

(Switch 1 has no effect.)

 

 

 

 

 

 

 

 

O 1

2

 

O 1

2

 

 

N

 

 

N

 

lockout Setup and Factory menus

 

or

 

 

 

 

 

(Switch 1 has no effect.)

 

 

 

 

 

 

Input

Output

Global

Commu-

 

 

nications

 

 

 

 

 

 

 

 

Panel

Diagnostics

Calibration

 

 

 

Lockout

 

 

 

 

 

 

 

 

 

1.4

WATLOW Series 998 User’s Manual

Hardware Setup, Chapter 1

Chapter 2 Installation and Wiring

NOTE:

 

 

A minimum of 1.66”

 

 

 

 

(42.2mm) spacing

 

 

between panel

Panel Cutout

 

cutouts is recom-

Maximum Panel

 

mended.

 

 

Thickness

 

 

0.38" (9.65mm)

 

 

 

 

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

Figure 2.1a -

Series 998

Panel Cutout

Dimensions. 1.77 + 0.02 -0.00

(45mm + 0.6)

NOTE:

Adjustable mounting brackets can also be side mounted.

Figure 2.1b -

Series 998

Dimensions.

 

 

WATL W

 

 

 

 

 

 

 

PROCESS

 

 

 

 

 

 

 

 

 

 

 

 

WATL W

 

 

 

 

 

 

 

 

 

DSPY

MODE

4.03"

1A

2A

1B

2B

 

PROCESS

 

2.18"

(102mm)

 

 

CH A

 

 

 

 

 

 

(55mm)

 

DISPLAY

 

 

 

CH A

 

CH B

 

 

 

AUTO

 

 

 

 

 

 

CH B

MAN

 

 

 

 

 

 

 

 

 

 

 

AUTO

1A

2A

1B

2B

SERIES 998

 

 

 

MAN

 

 

 

 

 

 

 

 

MODE

 

 

 

4.03"

 

 

 

 

 

 

 

 

 

 

 

SERIES 998

 

 

 

 

 

(102mm)

 

 

 

2.18"

 

 

 

 

 

 

 

 

(55mm)

 

 

 

 

 

 

 

 

 

 

 

Panel

 

 

Adjustable

 

 

 

 

 

 

 

Mounting Bracket

 

 

 

 

 

 

 

 

 

 

 

 

0.68"

 

4.06"

 

 

 

 

 

 

 

(17 mm)

(103 mm)

 

 

 

Installation and Wiring, Chapter 2

WATLOW Series 998 User’s Manual

2.1

Installing

˜

NOTE:

Removing the controller chassis from its case makes mounting easier.

Installing the Series 998

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.

Figure 2.2 -

Side and top view.

Side (996 or 998)

 

or Top and Bottom (997 or 999) View

 

Panel

Adjustable

Top and Bottom (996 or 998)

or Side (997 or 999) View

 

Mounting Bracket

 

 

Release Tabs

 

 

 

 

Mounting Slots

Bezel

 

 

External Gasket

Mounting Collar

 

 

 

2.2

WATLOW Series 998 User’s Manual

Installation and Wiring, Chapter 2

Installing

4.Loosen the mounting bracket screws enough to allow for the mounting

çcollar and panel thickness. Place each mounting bracket into the

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.

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 996 and 998 units (vertical) must have the mounting brackets located on either side of the unit. When installing Series 997 and 999 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 difficult 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.

Installation and Wiring, Chapter 2

WATLOW Series 998 User’s Manual

2.3

Wiring

ç

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.

NOTE: Input-to-output isolation is defeated when the external signal conditioner power supply is used to power a transmitter connected to input 1 or input 2.

Figure 2.4 -

Power wiring.

ç

CAUTION:

The Series 998 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 the Series 998

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 998 uses optical isolation between the analog inputs and the controller outputs/digital input. This isolation provides a 500VÅ (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 through 4 and the standard event input are grouped together. This does not apply to Output 4 when configured as communications.

The digital communications output (4) is separate from the above groups.

Power Wiring

 

L1

L2

 

 

 

 

 

 

 

 

 

 

100 to 240VÅ (ac) nominal, (85 to 264 actual)

Fuse

 

 

22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21

 

 

11

 

 

 

 

 

 

 

 

 

 

Vertical Package

99 8 _ - _ _ _ _ - _ _ _ _

 

 

 

 

Earth Ground

 

 

 

 

 

 

 

 

Horizontal Package

99 9 _ - _ _ _ _ - _ _ _ _

 

 

 

 

 

 

 

 

24 to 28 V(ac/dc) nominal, (20 to 30 actual)

 

 

 

 

 

 

 

 

Vertical Package

99 6 _ - _ _ _ _ - _ _ _ _

 

 

 

 

 

 

 

 

Horizontal Package

99 7 _ - _ _ _ _ - _ _ _ _

 

 

 

 

 

 

 

 

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 input 2 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 1of 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).

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.

Process input: Isolation must be maintained between input 1 and input 2. If both input 1 and input 2 are used as process inputs, a separate power supply and transmitter must be used for each input. Output option T (external signal conditioner power supply) can be used to supply power for only one input.

2.4

WATLOW Series 998 User’s Manual

Installation and Wiring, Chapter 2

Figure 2.5 - Process wiring example.

Event Input 1

Standard on all units

14 - 36VÎ (dc) Event Input 1 off (open) 0 - 3VÎ (dc) Event Input 1 on (closed)

23

24

OR 23

24

 

 

 

 

+

-

Wiring

 

OPTO

 

 

ISOLATOR

4.99KΩ

 

.01µ f

+24VÎ (dc)

 

750Ω

10KΩ

4.99KΩ

Internal Circuitry

 

 

23

24

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.

988 Process

Input Control

 

 

4-20mA dc

 

 

 

Transmitter

 

Internal

+

R x

 

Resistor

 

+

+ 24VÎ (dc)

7

 

100 to 400

Power Supply

1/8 Watt

 

ohms

 

 

 

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.

Installation and Wiring, Chapter 2

WATLOW Series 998 User’s Manual

2.5

Wiring Example

Figure 2.6 -

System Wiring

Examples.

ç

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.

ç

CAUTION:

To avoid damage to property and equipment, use National Electric Code (NEC) standard wiring practices to install and operate the series 998. Failure to do so could result in such damage.

L1

 

 

 

 

 

 

 

 

 

 

 

L1

L2

 

 

 

 

 

 

 

 

 

 

 

L2

Fuse

 

 

Mercury

 

 

 

 

 

 

 

 

High-

 

 

Relay

 

 

 

 

 

 

 

 

Temperature

 

 

Earthground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fuse

Light

21 22

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

 

 

 

 

 

 

 

 

 

 

 

 

13

 

L1

 

 

 

 

 

 

 

 

 

 

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

Humidify

L2

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

 

 

 

 

 

 

 

 

L1

 

 

 

 

 

 

 

 

 

 

17

 

 

 

 

 

 

 

 

 

 

8

Dehumidify

L2

 

 

 

 

 

 

 

 

 

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

19

 

Coil

 

 

 

 

 

 

 

 

 

10

20

 

 

 

 

 

 

 

 

 

 

 

 

 

High-Limit

 

 

 

 

 

C NO NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mechanical

1

2

3

4

5

6

7

8

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

Environmental

 

 

 

 

 

 

 

 

 

 

 

 

Chamber

 

 

 

 

 

 

 

 

 

 

Cooling

Wet Bulb

 

Fan

 

 

 

RTD Sensor

 

L2

 

 

 

 

10 11 12 13 14 15 16 17

 

 

 

 

Dry Temp

 

 

RTD Sensor

 

 

 

 

Reset Series 146

 

 

Heater

Limit Control

 

 

146E-1601-3000

L2

 

 

 

 

 

 

 

Limit Sensor

 

2.6

WATLOW Series 998 User’s Manual

Installation and Wiring, Chapter 2

ç

WARNING:

To avoid damage to property and equipment, and/or injury or loss of life, use National Electric Code (NEC) standard wiring practices to install and operate the Series 998. Failure to do so could result in such damage, and/or injury or death.

NOTE:

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

Figure 2.7 -

Wiring notes.

 

 

Wiring Notes

L1

 

L2

 

earth ground

21

11

22

power

 

 

Installation and Wiring, Chapter 2

WATLOW Series 998 User’s Manual

2.7

Channel A Input Wiring

NOTE:

Using a grounded thermocouple for both input 1 and input 2 can cause ground loop problems.

NOTE:

Model number

99_ _-1 _ _ _-_ _ _ _

has no input 1 DIP switch.

ç

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.

Figure 2.8a — Thermocouple

Thermocouple only

O 1 2 3

 

N

99 _ _ - 1 _ _ _ - _ _ _ _

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

Universal signal conditioner Dip Switch Setting

99 _ _ - 2 _ _ _ - _ _ _ _

O 1 2 3

N

 

R, S, B

 

+

9

 

 

-

10

 

Dip Switch Setting

 

 

Figure 2.8b — RTD, 2- or 3-wire

 

 

Universal signal conditioner

 

 

 

 

99 _ _ - 2 _ _ _ - _ _ _ _

 

 

 

 

O 1 2 3

 

 

 

 

N

 

 

 

 

 

 

 

 

Dip Switch Setting

S1

8

S1

8

 

Jumper 9 to 10

S2

9

S2

9

 

 

S3

10

for 2-wire RTD

 

10

 

 

 

Figure 2.8c — 0-5VÎ, 1-5VÎ or 0-10VÎ (dc) Process

Universal signal conditioner 99 _ _ - 2 _ _ _ - _ _ _ _

Input impedance: 10K

O 1 2 3

N

 

Dip Switch Setting

 

+

9

V DC

-

10

Figure 2.8d — 0-20mA or 4-20mA Process

Universal signal conditioner 99 _ _ - 2 _ _ _ - _ _ _ _

Input impedance: 7

O 1 2 3

 

-

8

N

 

 

 

 

 

 

Dip Switch Setting

mA

+

10

 

 

 

 

2.8

WATLOW Series 998 User’s Manual

Installation and Wiring, Chapter 2

Watlow 999 Operating Manual

NOTE:

Using a grounded thermocouple for both input 1 and input 2 can cause ground loop problems.

NOTE:

Model number

99_ _-_ 1 _ _-_ _ _ _

has no In1 DIP switch.

ç

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.

 

 

Channel B Input Wiring

Figure 2.9a — Thermocouple

 

 

 

 

Thermocouple only

O 1

2

3

 

 

 

N

 

 

 

 

 

99 _ _ - _ 1 _ _ - _ _ _ _

 

 

 

 

 

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

 

 

 

 

 

Universal signal conditioner

Dip Switch Setting

 

 

 

 

 

 

 

 

99 _ _ - _ 2 _ _ - _ _ _ _

O 1

2

3

 

 

 

 

N

 

 

 

 

 

 

 

 

 

19

+

 

 

 

 

 

 

R, S, B

 

 

20

-

 

 

 

 

 

Dip Switch Setting

 

 

Figure 2.9b — RTD, 2- or 3-wire

 

 

99 _ _ - _ 2 _ _ - _ _ _ _

 

 

 

Jumper

 

 

 

 

 

 

19 to 20

 

 

 

 

 

 

for 2-wire

 

 

 

 

 

 

RTD

 

 

O 1 2 3

 

 

 

18

S1

 

N

 

 

 

 

 

 

18

S1

 

 

 

 

 

S2

 

Dip Switch Setting

 

 

19

19

 

 

 

S2

S3

 

 

 

 

 

20

 

 

 

 

20

 

 

 

Figure 2.9c — 0-5VÎ , 1-5VÎ , 0-10VÎ (dc) Process

99 _ _ - _ 2 _ _ - _ _ _ _

Input impedance: 10K

O 1 2 3

 

 

 

N

 

 

 

 

 

 

 

19

+

V DC

Dip Switch Setting

20

-

Figure 2.9d — 0-20mA or 4-20mA Process

99 _ _ - _ 2 _ _ - _ _ _ _

Input impedance: 7

O 1 2 3

18

-

N

 

 

 

mA

 

20

 

+

Dip Switch Setting

Installation and Wiring, Chapter 2

WATLOW Series 998 User’s Manual

2.9

Channel A Output Wiring

Figure 2.10a — AC Outputs

Dual Electromechanical Relays without Contact Suppression

Dual Form A, 2 Amps Off-state impedance: 31MΩ

99 _ _ - _ _ E _ - _ _ _ _

Dual Solid-state Relay without Contact Suppression

Dual Form A, 0.5 Amps Off-state impedance: 31MΩ

99 _ _ - _ _ K _ - _ _ _ _

 

 

External

1A

12

NO

Load

L2

13 COM

Fuse

L1

14

NO

L2

 

 

 

External

 

 

 

Load

2A

Figure 2.10b — Dual Switched DC

99 _ _ - _ _ C _ - _ _ _ _

12

+

External

+

External

13

-

-

Load 1A

Load 2A

 

 

 

14

 

 

 

 

23.5 to 30.6VÎ (dc)

+ VÎ

12

 

1500

 

13

1500

 

14

Internal Circuitry

Figure 2.10c — 0-20mA and 4-20mA Process

Load impedance: 800Ω max.

12

+

99 _ _ - _ _ F _ - _ _ _ _

14

-

Figure 2.10d — 0-5VÎ, 1-5VÎ and 0-10VÎ (dc) Process

Load impedance: 500Ω min.

99 _ _ - _ _ F _ - _ _ _ _

13

+

14

-

2.10 WATLOW Series 998 User’s Manual

Installation and Wiring, Chapter 2

Channel B Output Wiring

Figure 2.11a — AC Outputs

Dual Electromechanical Relay without Contact Suppression

Dual Form A, 2 Amps Off-state impedance: 31MΩ

99 _ _ - _ _ _ E - _ _ _ _

Dual Solid-state Relay without Contact Suppression

0.5 Amps

Off-state impedance: 31MΩ

 

 

External

1B

15

NO

Load

L2

 

 

 

 

16

COM

Fuse

L1

17

NO

 

 

L2

 

 

External

 

 

2B

 

 

Load

99 _ _ - _ _ _ K - _ _ _ _

Figure 2.11b — Dual Switched DC

99 _ _ - _ _ _ C - _ _ _ _

+

Load

+

Load

-

1b

-

2b

15

 

 

 

16

 

 

 

17

 

 

 

 

23.5 to 30.6VÎ (dc)

 

+ VÎ

 

15

 

 

 

 

 

1500

16

 

 

 

 

 

1500

17

 

 

 

Internal Circuitry

Figure 2.11c — 0-20mA and 4-20mA Process

Load impedance: 800Ω max.

99 _ _ - _ _ _ F - _ _ _ _

15 +

17 -

Figure 2.11d — 0-5VÎ, 1-5VÎ and 0-10VÎ (dc) Process

Load impedance: 500Ω min.

99 _ _ - _ _ _ F - _ _ _ _

16 +

17

-

Installation and Wiring, Chapter 2

WATLOW Series 998 User’s Manual 2.11

Output 3 Wiring

NOTE: Input-to-output isolation is defeated when the external transmitter power supply is used to power a transmitter connected to input 1 or input 2.

Figure 2.12a — AC Outputs

• Solid-state Relay without

Solid-state Relay with

Contact Suppression

0.5 Amps

Contact Suppression

Off-state impedance: 31MΩ

0.5 Amps

99 _ _ - _ _ _ _ - K _ _ _

Off-state impedance: 20KΩ min.

 

99 _ _ - _ _ _ _ - B _ _ _

 

Electromechanical Relay without

Contact Suppression

Form A or B, 5 Amps Off-state impedance: 31MΩ

99 _ _ - _ _ _ _ - J _ _ _

Form A or B

Alarm Jumper Settings (Top View)

 

 

NC Form B

 

 

External

or

 

L2

Load

NO Form A

1

 

 

 

L1

 

COM

2

 

 

 

Fuse

Form A

Figure 2.12b — Switched DC

External

+

1

 

 

 

 

Minimum load resistance: 500Ω

-

2

 

 

Load

 

 

 

 

 

 

 

 

 

 

99 _ _ - _ _ _ _ - C _ _ _

19 to 32VÎ (dc)

 

 

 

 

 

 

 

 

1

 

 

 

+ VÎ

 

 

 

 

 

 

 

790Ω

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Internal Circuitry

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2.12c — Process Retransmit

0-20mA, 4-20mA

Load impedance: 600Ω max.

99 _ _ - _ _ _ _ - M _ _ _

0-5VÎ, 1-5VÎ or 0-10VÎ (dc)

Load impedance: 500Ω min.

99 _ _ - _ _ _ _ - N _ _ _

+ -

1

2

Figure 2.12d — External Transmitter Power Supply

99 _ _ - _ _ _ _ - T _ _ _

Transmitter

+V

+

1

 

-

2

 

 

 

 

 

4-20mA out

-V

 

 

 

 

 

 

 

 

 

 

See Chapter 1 for DIP switch location and set-

 

 

 

 

 

tings.

 

 

-+

 

 

 

 

Input

 

 

 

 

 

 

 

 

 

 

1 or 2

 

 

 

 

 

 

 

 

2.12 WATLOW Series 998 User’s Manual

Installation and Wiring, Chapter 2

Figure 2.13a — AC Outputs

Solid-state Relay with

Contact Suppression

0.5 Amps

Off-state impedance: 20KΩ min.

99 _ _ - _ _ _ _ - _ B _ _

Solid-state Relay without

Contact Suppression

0.5 Amps

Off-state impedance: 31MΩ

99 _ _ - _ _ _ _ - _ K _ _

Output 4 Wiring

Electromechanical Relay with

Contact Suppression

(On NO and COM contacts only)

Form C, 5 Amps

Off-state impedance: 20KΩ min.

99 _ _ - _ _ _ _ - _ D _ _

Electromechanical Relay without

Contact Suppression

Form C, 5 Amps

Off-state impedance: 31MΩ

99 _ _ - _ _ _ _ - _ E _ _

 

External

 

 

L2

Load

NO

5

 

 

 

L1

 

COM

6

Fuse

 

 

 

 

 

 

 

NC

7

(7 for D & E outputs only)

Figure 2.13b — Switched DC, Open Collector

Minimum load resistance: 500Ω 99 _ _ - _ _ _ _ - _ C _ _

19 to 32VÎ (dc)

 

+ VÎ

 

5

 

790

 

6

 

 

7

 

 

Internal Circuitry

 

External

+

5

-

6

Load

 

 

COM 7

NOTE: Input-to-output isolation is defeated when the external transmitter power supply is used to power a transmitter connected to input 1 or input 2.

Figure 2.13c — External Transmitter Power Supply

99 _ _ - _ _ _ _ - _ T _ _

See Chapter 1 for DIP switch location and settings.

Transmitter

+V

+

5

-

6

-V

4-20mA out

 

 

 

 

 

 

+

-

 

 

Input

 

 

1 or 2

 

For data communications wiring refer to How to Use

Data Communications with the Watlow Series 988 Family Controls.

Installation and Wiring, Chapter 2

WATLOW Series 998 User’s Manual 2.13

Notes

2.14 WATLOW Series 998 User’s Manual

Installation and Wiring, Chapter 2

Chapter 3 Keys and Displays

Upper Display

Indicates either actual process value for channel A or channel B, the operating prompt values, or error codes. When powering up, the display will be blank for 3 seconds. Red or green, 0.4” (10mm) high, seven-segment, four-digit LED display.

CH A Indicator Light

When lit, if the CH B light is not on, the channel A process value is shown in the upper display and the channel A set point value is shown in the lower display. When both CH A and CH B lights are on, the upper display shows the channel A process value and the lower displays shows the channel B process value.

CH B Indicator Light

When lit, if the CH A light is not on, the channel B process value is shown in the upper display and the channel B set point value is shown in the lower display. When both CH A and CH B lights are on, the upper display shows the channel A process value and the lower display shows the channel B process value.

Up-arrow Key >

 

Lower Display

 

Indicates the channel A or

 

channel B set point, or channel

 

B process value, menu

 

prompts, or alarm codes. Red

 

or green, 0.3” (8mm) high,

 

seven-segment, four-digit LED

WATL W

display.

 

 

1A, 2A, 1B, 2B Indicator

 

Lights

PROCESS

These lights indicate when out-

 

put 1A, 2A, 1B or 2B is active.

 

Display Key

 

The Display key is used to

1A 2A 1B 2B

select which channel A and/or

CH A

B parameter to displayed. On

DISPLAY

initial power-up the upper dis-

CH B

play shows the channel A

 

AUTO

process value and the lower

MAN

display shows the channel A set

point value and the CH A light

 

MODE

is on. One press of the Display

key lights CH B and the upper

 

SERIES 998

display shows the channel B

process value and the lower

 

 

display shows the channel B

 

set point value. A second press

 

of the key lights both CH A and

 

CH B, and the upper display

 

shows the channel A process

 

value and the lower display

 

shows the channel B process

 

value. See the next page for

more information on the Display Loop.

Increases the value of the displayed prompt. A light touch increases the value by one. Holding the key down increases the value at a rapid rate. New data does not take effect for five seconds or until the Mode µ or Display key is pressed.

Down-arrow Key <

Decreases the value of the displayed prompt. A light touch decreases the value by one. Holding the key down decreases the displayed value at a rapid rate. New data does not take effect for five seconds or until the Mode µ or Display key is pressed.

Up-arrow + Down-arrow Keys

Press simultaneously for three seconds to enter the Setup Menu. Continue to press both keys for another three seconds to enter the Factory Menu.

Auto/Man Key å

Used to switch from auto to manual control or vice versa. Also used to reset alarms.

Mode Key µ

Steps the control through the menus. New data is entered once the Mode key is pressed.

Mode+Up-arrow Key µ + >

To move backwards through the menus, hold down the Mode key, then press the Up-arrow key to scroll. The Mode key must be pressed first and held before the Up-arrow key will begin scrolling. Scrolling is disabled once the keys are released or you reach the top of the menu.

Figure 3.1 -

Series 998 Keys and

Displays.

Keys and Displays, Chapter 3

WATLOW Series 998 User’s Manual

3.1

Display Loop

NOTE:

Lower display alternately flashes [`rP`] and lower display value when ramping is in process.

Display Key and Loop

On power up, the Series 998 displays the channel A set point value in the lower display and the channel A process value in the upper display and the CH A (channel A) indicator light is on. Press the Display key once to view the channel B set point and process values (CH B will be lit). Press the Display key once again and channel A process value is displayed in the upper display and channel B process value is displayed in the lower display. At this point, both CH A and CH B will be lit. Press the Display key again to display units.

Any point in any menu, if no key is pressed for one minute the display returns to displaying the channel A process and set point.

Figure 3.2 -

The Display Loop.

Display Loop

Channel A

Channel B

Channel A

 

 

 

Process

 

Process

 

Process

 

 

 

[`75]

 

 

[`80]

 

[`75]

 

 

 

[```]

 

 

 

[100]

 

[125]

 

[`80]

 

 

 

[`°F]

 

 

 

 

 

 

 

 

 

Channel A

Channel B

Channel B

 

 

Process

Set Point

 

Set Point

 

Process

 

 

Units

Display Loop Parameters

Channel A Process and Set Point: The channel A process value is shown in the upper display. The set point is shown in the lower display, it sets the operating set point for the channel A control outputs. If channel A is in manual mode the set point is in percent output.

Range:

[`rL1] to [`rH1] in auto mode

 

[-100] % to [`100] % in manual mode (heat/cool)

 

[```0] % to [`100] % in manual mode (heat only)

 

[-100] % to [```0] % in manual mode (cool only)

Default:

depends on input 1 range and type

Channel B Process and Set Point: The channel B process value is shown in the upper display. The set point is shown in the lower display, it sets the operating set point for the channel B control outputs. If channel B is in manual mode the set point is in percent output.

Range:

[`rL2] to [`rH2] in auto mode

 

[-100] % to [`100] % in manual mode (heat/cool)

 

[```0] % to [`100] % in manual mode (heat only)

 

[-100] % to [```0] % in manual mode (cool only)

Default:

depends on input 2 range and type

Process A and Process B: The channel A process value is displayed in the upper display with channel B process value displayed in the lower display.

Range:

depends on input types

Default:

none

Units: Shows the units associated with the temperature value. This parameter shows what the [`C-F] (Global Menu) is set to.

Range:

[``°F] or [``°C]

Default:

none

Hidden if:

input 1 and input 2 are process inputs

3.2

WATLOW Series 998 User’s Manual

Keys and Displays, Chapter 3

Chapter 4 The Setup Menus

NOTE:

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

Navigating the Setup Menus

To reach

Setup Menus, begin in the Display Loop and press both the

Up-

> and Down-arrow < keys for three seconds. The Setup

Menu prompt [`SEt] will appear in the lower display, and the Input Menu prompt [InPt] will appear in the upper display. The four Setup Menus are: [InPt]; Output [OtPt]; Global [GLbL]; and Communications [COM]. Use the Up-arrow > or Down-arrow < key to select a menu and the Mode key µ to step through a menu. The Communications Menu appears only on units equipped with the data communications option -____-_R__ or 99__-____-_S__).

You will not see every prompt in any of these menus. The unit’s configuration and model number determine which prompts appear. After stepping through each menu, the Series 998 returns to the Setup Menu prompt.

Use the

arrow or Down-arrow key to select the next menu, or use the

Mode

advance through the same menu again. To move backwards

through the menu hold the Mode key down and press the Up-arrow key.

Use the

arrow or Down-arrow key to change the prompt setting.

Refer to

Appendix for model number options. For additional informa-

tion

communications and the communications prompts, refer to the

supplemental manual Data Communications with the Watlow Series 988 Family Controllers.

TL W

1B

2B

DISPLAY

AUTO

MAN

MODE

Begin in the Display Loop, and press the Up-arrow > and Down-arrow < keys simultaneously to reach the Setup menus.

NOTE:

The lockout DIP switch hides the Setup menus. See Chapter 1.

Navigating the Setup menus.

TL W

1B

2B

DISPLAY

AUTO

MAN

MODE

SERIES 998

 

>> > >

[Inpt] [Otpt] [GLbl] [COM]

[`SEt]

[`SEt]

[`SEt]

[`SEt]

Input

Output

Global

Communications

Menu

Menu

Menu

Menu

p. 4.2

p. 4.16

p. 4.32

p. 4.38

Press the Up-arrow key > to select one of the Setup menus.

Setup Menus, Chapter 4

WATLOW Series 998 User’s Manual

4.1

Setup-Input

Reaching the Input Menu

[InPt] Input Menu

 

 

µ

[`SEt] Setup Menus

Enter your settings,

 

 

 

 

?

from the controller’s

 

upper display.

µ[`In1] Input 1 (page 4.5)

 

WA

?

 

 

µ

[dEC1] *Decimal 1

1A

2A

?

µ

[`rL1] Range Low 1

CH B

 

CH A

 

 

 

 

 

?

SERIES 998

µ

[`rH1] Range High 1

 

 

 

 

?

µ[CAL1] Calibration Offset 1

Select the Input Menu, then

?

press the Mode key µ to step

µ

[rtd1] *RTD Calibration Curve 1

through the prompts.

?

µ[Ftr1] Input 1 Software Filter

?

µ[`In2] *Input 2 (page 4.10)

?

µ[deC2] *Decimal 2

 

 

 

 

 

 

 

 

?

 

 

 

 

 

 

 

 

[`rL2] *Range Low 2

 

>

 

>

 

>

 

>

µ

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

?

 

[`rH2] *Range High 2

[DEC1]

[DEC1]

[DEC1]

[DEC1]

µ

 

 

 

 

 

 

 

 

?

Press the Up-arrow key > or

µ

[CAL2] *Calibration Offset 2

?

the Down-arrow key < to select

 

[rtd2] *RTD Calibration Curve 2

one of the prompt values.

 

 

µ

 

 

 

 

 

 

 

 

?

µ[Ftr2] *Input 2 Software Filter

?

µ[Lin2] *Input 2 Linearization

?

µ [`Alt] *Altitude

Figure 4.2 -

*Prompts may not appear, depending

The Input Menu.

on controller configuration.

4.2

WATLOW Series 998 User’s Manual

Setup Menus, Chapter 4

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