Watlow 935B User Manual

Download

Page 1

0600-0015-0001 Rev C $15.00

July 2000 Supersedes: 0600-0015-0001 Rev B

Registered Company

Winona, Minnesota USA

ISO 9001

TOTAL

3 Year Warranty

CUSTOMER

SATISFACTION

Series 935B

Temperature Controller

with Countdown Timer

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

Phone: +1 (507) 454-5300, Fax: +1 (507) 452-4507, http://www.watlow.com

U.S. English

Now with Remote

Timer Start and

Fully DIN-a-mite

Compatible

User Levels:

• New User ...................................... Go to page 2

• Experienced User / Set-Up ........ Go to page 11

• Expert User ................................ Go to page 51

Installers:

• Mounting ..................................... Go to page 40

• Wiring Information .......................Go to page 44

Page 2

Safety Information in this Manual

Note, caution and warning symbols appear throughout this book to draw your attention to important operational and safety information.

A “NOTE” marks a short message to alert you to an important detail.

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

A “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 lightning bolt in a lightning 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 configuration information to verify that your selections are consistent with your application: inputs; outputs; alarms; limits; etc. If the problem persists after checking the above, you can get technical assistance by calling your local Watlow representative (see back cover of this manual), or in the U.S., dial +1 (507) 494-5656. For technical support, ask for an Applications Engineer.

Please have the following information available when you call:

• Complete model number • All configuration information

• User’s Manual • Diagnostic menu readings

Warranty and return information is on the inside back cover of this manual.

Your Comments

Your comments or suggestions on this manual are welcome. Please send them to the Technical Literature Team, Watlow, 1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota, 55987-5580 U.S.; Telephone: +1 (507) 454-5300; fax: +1 (507) 452-4507.

Safety Alert

CAUTION or

WARNING

∫

Electrical Shock Hazard

CAUTION or

WARNING

Page 3

Watlow Series 935B User’s Manual 3

Where to find it…

Table of Contents

Item ............................................................. Page

Introduction ........................................................ 4

How Keys Work ................................................. 6

Begin Controlling ................................................ 8

Set Point Change ............................................... 9

Simple Error / Response ................................. 10

Software Map; Learn ........................................ 11

Operations Menu; Learn .................................. 12

PID Menu; Learn ...............................................14

Configuration Menu; Learn .............................. 18

Lockout Functions ............................................ 20

Setting Up Inputs and Outputs ........................ 22

Using Remote Timer Start Input .......................24

Front Panel Lockout ......................................... 25

Alarms; Learn ................................................... 26

Alarms; Setting and Clearing ........................... 28

Timer; Learn ..................................................... 30

Timer; Setting ................................................... 32

Timer Example ................................................. 33

Auto-tuning ....................................................... 34

PID Fine tuning ................................................ 35

Calibrating ........................................................ 36

Errors and Troubleshooting ............................. 38

Mounting ...........................................................40

Dimensions .......................................................41

Installing ............................................................42

Terminal Block Removal ...................................43

Wiring ............................................................... 44

Wiring Examples .............................................. 45

Glossary ........................................................... 46

Index ................................................................ 47

Specifications ................................................... 48

Ordering Information ........................................ 49

Declaration of Conformity ................................ 50

Advanced Software Map ...................................51

Warranty/Returns ................... Inside Back Cover

How to Reach Us .............................. Back Cover

Table # ..........................................................Page

1 Output Functions ....................................... 5

2 Error Messages & Action ....................... 10

3 Software Organization ............................ 11

4 Operations Menu Overview ................... 13

5 PID Menu Overview ............................... 16

6 Configuration Overview .......................... 18

7 Lockout Options ..................................... 21

8 Setting Inputs & Outputs ........................ 23

9 Using Front Panel Lock .......................... 25

10 Alarm Functions ..................................... 27

11 More Alarm Functions ............................ 29

12 Timer Functions/Settings ........................ 31

13 Possible Error Codes ............................. 39

14 Troubleshoot Outputs ............................... 39

15 Input Range Information ......................... 49

Figure # ........................................................Page

1 Input & Output Overview .......................... 5

2 Front Panel Functions .............................. 7

3 Begin Controlling ...................................... 8

4 Changing the Set Point ............................ 9

5 Front Panel Lock Wiring ......................... 25

6 Auto-tuning ............................................. 34

7 Calibrating .............................................. 36

8 Panel Cut-out Dimensions ..................... 40

9 Knockout Template ................................. 40

10 Dimensions ............................................ 41

11 Case Top View & Collar ......................... 42

12 NEMA 4X/IP65 Seal ............................... 42

13 Terminal Block Removal ........................ 43

14 Wiring ..................................................... 44

15 System Wiring Example ......................... 45

16 Ladder Diagram Example ...................... 45

Page 4

4 Watlow Series 935B User’s Manual

Welcome to the Watlow Series 935B!

General Description

The Series 935B is a temperature controller with countdown timer for industrial, commercial, or scientific applications. It offers 1/32 DIN panel-mounting, digital indication, single temperature sensor input from a thermocouple or RTD, and dual control outputs. Both outputs are fully DIN-a-mite®compatible, and may operate in combinations of heat or cool, and alarm or timer.

Special Features

• Easy to use operator interface and user’s manual

• Compact panel footprint; 1/32 DIN size

• Water and corrosion proof; NEMA 4X / IP65 rated

• Reliable; built to UL, CUL approved safety standards with a three year warranty

• Accuracy with economy

• Universal power supply for worldwide application

Unique Features

The Series 935B is configured with dual dc DIN-a-mite

compatible control outputs and a separate logic input for remote timer start or front panel lock. The Series 935B timer functions include heat/timer or cool/timer countdown modes in hours:minutes or minutes:seconds.

Introduction

Page 5

Watlow Series 935B User’s Manual 5

Output 1

Output 2

RDY

SET

Single Input

Dual Output

Single Input

Type J, K, T, N, S, E Thermocouple, 1° RTD, or 0.1° RTD

Output 1

Switched dc

Heat Cool Alarm

NONE

None

Heat Cool Alarm

15 45

Timer (Hr:Min or Min:Sec)

NONE

None

Output 2

Electromechanical Relay, Switched dc or Solid-state Relay

Table 1 - Valid Output Functions

First select Output 1: Then select Output 2:

Heat None, Cool, Alarm, Timer

Cool None, Heat, Alarm, Timer

Alarm None, Heat, Cool

None Heat, Cool, Alarm

• The function of Output 1 determines the options available for Output 2.

• First select the function of Output 1. Refer to the table (right), then select the function of Output 2.

Figure 1 - Series 935B Input and Output Overview

Page 6

6 Watlow Series 935B User’s Manual

Press & read or press & change

Reading or Changing Information is Easy

You can simply:

• Read the normally displayed actual temperature, or…

• Press and hold ß to read the set point, or…

1. Press and hold . and , simultaneously for three seconds to move to a software menu.

2. Press and hold ß to display a choice or value.

3. While continuing to press ß, press . or , to choose new data or select a new value.

4. Release ß and the arrow key to complete the change.

NOTE: The normally displayed actual temperature and set point can be altered to show different

combinations of actual temperature, set point temperature, or time in hours:minutes or minutes: seconds. See [dISP] p. 18.

Page 7

RDY

SET

Seven-segment alphanumeric display:

• Shows process value, set point information, time, or

• Shows prompt name or value, depending on the key combination pressed.

Set Key: ß

• Configurable to shift between normally-displayed value and set values. See [dISP], p.18.

• Clears a latched alarm.

LED 1:

Lit when Output 1 is active.

LED 2:

Lit when Output 2 is active.

RDY:

Lit when the process temperature is inside the timer ready band.

Up / . (Increment) Down / , (Decrement) Arrow Key:

• Selects new information when Set Key is pressed.

• Steps through software menus and parameters.

• Starts and stops the timer.

• To set up the control, go to the Easy Software Map, p. 11.

Figure 2 - Series 935B Front Panel Functions

Watlow Series 935B User’s Manual 7

Page 8

Begin Controlling

To Begin Controlling:

1. Apply power to the system.

A properly-wired Series 935B will begin controlling the thermal system as soon as you apply power to it.

2. Look at the Series 935B’s display. It is reading actual temperature, set point temperature, or time.

• To change set point, go to p. 9.

• The Series 935B will auto-tune when you tell it to, go to p. 34.

• If you see an error, go to p. 10.

System

Power

RDY

SET

Figure 3 - Begin Controlling

8 Watlow Series 935B User’s Manual

Page 9

Change Set Point

RDY

SET

To Change the Set Point:

Your Series 935B displays the actual process temperature when it comes from the factory. You can change it to normally display the set point or time. Go to p. 18, see [dISP].

1. Press and hold ß.

2. Press one of the arrow keys to alter the set point either upward or downward.

3. Release ß to complete the change.

Figure 4 - Changing the Set Point

Watlow Series 935B User’s Manual 9

Page 10

Respond to a simple error

Display Probable Cause Recommended Action

Reversed thermo- Change the sensor couple connection leads on Terminals + to –. 1 and 2.

Sensor type Go to {`In} prompt, check mismatch selection (see p. 22), or check or open RTD. RTD, replace as necessary.

Sensor type Go to {`In} prompt, mismatch. check selection

(see p. 22).

Open Thermocouple, Check the sensor, bad connection, or replace as broken wire. necessary.

Electrical noise. Cycle power to system. See if error

clears. Check system for electrical interference.

Control is inoperable. Check for line voltage at

terminals 7 and 8.

RDY

SET

• Simply correct the cause.

• Errors are non-latching

and self-clearing.

• For advanced error and troubleshooting information, go to p. 39.

If You See An Error Code:

1. Be aware that most errors are input (sensor) related.

2. Read the table below and follow its recommendations.

Table 2 - Error messages and recommended action

[`Er1]

[`Er2]

[`Er3]

[`Er4]

[`Er5]

[````]

10 Watlow Series 935B User’s Manual

Page 11

Watlow Series 935B User’s Manual 11

Software Organization

• The Series 935B has three primary menus in addition to a normal display.

• The software reverts to the normal display after 60 ± 5 sec. with no key action.

Table 3 - Software Organization

• To access the Operations Menu, press the

. and , keys simultaneously for three seconds.

• At the [`pid] or [Cnfg] prompt, press and hold the ß key, and the . or , key to select [`yes]. Release the keys to move to the new menu.

• Move through each menu with the . or , key.

• Make changes by pressing and holding the ß key, and

then the . or , key to select a new choice or value. Release the keys to complete the change.

• To exit any menu: Press and hold the

. and , keys for three seconds,

or the display will revert to normal display after 60± 5 seconds.

Navigation Example

[Prnc] [Prno [dEnc [dEno

[`Ot2]

[disp]

[Alty]

Learn Easy Software Map

,,,,

Display

Actual Temperature, Set Point, or Time Remaining

Operations, p. 12

Start / Stop:

•Autotune

Set:

•Alarm Ranges

•Countdown Timer

•Idle after Timer

Select Set Point Type:

•Local / Remote

Go to:

PID Menu Configuration Menu

[~yes] [~yes]

PID, p. 14

Set:

•Heat PID Functions

•Dead Band

•Cool PID Functions

•Calibration Offset

Configuration, p. 18

Set:

•Inputs / Functions

•Output Types

•Display Default

•Alarms / Functions

•Timer Functions

•Failure Mode

•Lockout Functions

Page 12

12 Watlow Series 935B User’s Manual

The Series 935B Operations Menu is the first menu you encounter when you press the . and , keys simultaneously for three seconds. The Operations Menu provides a location to initiate the following actions or complete the following tasks:

• Auto-tune [`Aut]: Start or stop the auto-tuning process. Auto-tuning selects a set of viable proportional, integral,

and derivative values for heat and/or cool output.

• Alarm Points, [`ALO] and [`AhI]: Select the values for the high alarm point and the low alarm point. Alarm points,

dependent on sensor type high and low ranges, reside in the Operations Menu for easy access.

• Timer Countdown Time [tMr]: Select a countdown time value between 00:00 and 99:59 hours:minutes or minutes:seconds. Time interval choices [thM] and [tMS] reside in the Configuration Menu for Output 2.

• Idle Set Point [IDLE]: [trAc] or an adjustable value between [``rL] and [``rh]. Choose to have the Idle Set Point track [trAc], or equal, the Primary Set Point; or select an Idle Set Point value in °F or °C between the range low [``rL] and range high [``rh] values. The Idle Set Point is active both before and after the timing sequence. The normal or Primary Set Point controls during the timing sequence.

• Go to the PID Menu [`Pid]: Choose [`YES] to proceed to the PID Menu.

• Go to the Configuration Menu [CnFg]: Choose [`YES] to proceed to the Configuration Menu.

The table on the next page presents this information in graphic form.

NOTE: Not every prompt listed here or on p. 13 in the Operations Menu will appear in your unit. Prompts vary with lockout function and output set-up. Whether or not prompts appear in the Operations Menu depends on two features of the Series 935B:

• Lockout function; the Lockout Tag [`tAg] function masks prompts from view in the various menus. (If you cannot see a prompt, you can make no change.) See Using Lockout Functions, p. 20, for more information.

• Output 1 and 2 Configuration; some outputs are mutually exclusive. For example, if Output 1 is Alarm, then Output 2 cannot be Timer. Therefore, the Operations menu will have no timer-related prompts. See the Valid Output Functions Table, p. 5, or Setting Up Inputs and Outputs, p. 22.

Learn the Operations Menu

Page 13

Watlow Series 935B User’s Manual 13

Table 4 - Operations Menu Overview

To enter the Operations Menu, press the . and , keys simultaneously for three seconds.

Auto-tune - Start the auto-tune action to automatically select a set of viable PID values;

[tunE] will flash during auto-tuning.

[``no] [`YES]

NO YES

Alarm Low - Select a low alarm point, adjustable between Off, Range Low and Alarm High.

[`AhI]

Alarm High

Alarm High - Select a high alarm point, adjustable between Alarm Low and Range High, or OFF.

[`ALO]

Alarm Low

Countdown Timer - Select a countdown time duration.

[0)º0] [9959]

00:00 to 99:59 Hrs:Min or Min:Sec

Idle Set Point Type - Choose to track set point, or select a separate idle set point adjustable between Range Low and Range High. When [`Ot1] = [thM] or [tMS], view the idle set point from the set point display with a three second

ßpress.

[trAc] [``rL] [``rh]

Track Range Range Set Low High Point

PID Menu - Go to the PID Menu.

[``no] `YES]

NO YES

Configuration Menu - Go to the Configuration Menu.

[``no] `YES]

NO YES

[`Aut]

[`AhI]

[tmr]

[`Pid]

[CnFg]

[`ALO]

[IDLE]]

Page 14

14 Watlow Series 935B User’s Manual

Choosing a PID Setting Strategy

You may rely solely on the Auto-tune [`Aut] function (p. 34) and factory defaults to determine PID values for your system, or you may use auto-tuning and additional manual adjustments. You must select dead band [``db] and calibration offset [`CAL] values manually.

The Series 935B PID Menu is the first sub-menu you encounter after moving to the Operations Menu. The PID Menu provides a software location to select the individual heat or cool proportional band, hysteresis, and cycle time values; and the dead band, integral, derivative, and calibration offset values.

To go to the PID Menu:

1. Go first to the Operations Menu by pressing

. and , simultaneously for three seconds.

2. Scroll through the Operations Menu with

, until you see the [`Pid] prompt.

3. While pressing ß to display [``no], choose [`YES] with . or

4. Release ß to see the first PID prompt.

NOTE: Access to the PID Menu and the prompts there varies with lockout function and output set-up. The PID Menu is locked out when the 935B leaves the factory.

• Lockout function; the Lockout Tag [`tAg] function masks menus from view (if you cannot see a prompt, you can

make no change). See Using Lockout Functions, p. 20.

• Output set-up; you must choose [hEAt] or [COOL] in either Output 1 or Output 2 to have access to the PID Menu. With a [hEAt] only choice, [COOL] prompts are not visible, and vice versa.

See the Valid Output Functions Table, p. 5, or Setting Up Inputs and Outputs, p. 22.

NOTE: Proportional Band, Integral, Derivative, Dead Band, and Calibration Offset values are adjustable in whole or tenth °F or °C, depending on input type [``In] and [`C_F] Celsius/Fahrenheit Configuration Menu choices.

Learn the PID Menu

Page 15

Setting PID Menu Values

• Proportional Band, Heat and Cool [Pb`h] and [Pb`c]: Select a value (degrees) to set up band on either side (±)

of the Primary Set Point in which the heat and/or cool proportioning function(s) will be active. For on/off control, set [Pb`h] or [Pb`c] = 0.

Range: 0 to 999°F/555°C, or 0.0 to 999.0°F/555.0°C Default: 25°F/17°C, or 25.0°F/17.0°C

• Hysteresis, Heat and Cool [hYSh] and [hYSc]: For use with on/off control only. Select the value (degrees) for the

process variable change required to re-energize the control heat and/or cool output. For ON/off control, set [Pb`h] or [Pb`c] = 0.

Range: 1 to 999°F/555°C, or 0.1 to 999.0°F/555.0°C Default: 3°F/2°C, or 3.0°F/2.0°C

• Cycle Time, [Ct`h] and [Ct`c]: Select the value (seconds) required for the heat and/or cool output(s) to complete

a full ON through off cycle.

Range: Switched dc/Solid State Relay: 0.1 to 60.0 seconds Default: 5.0 seconds Range: Electromechanical Relay: 5.0 to 60.0 seconds Default: 30.0 seconds

• Dead Band [``db]: Dead Band adjusts the effective cool set point above the primary set point by the Dead Band

value in degrees. This creates a band between the heating and cooling proportional bands where only integral and derivative activity will occur. For more information on Dead Band fine tuning, go to p. 35.

Range: 0 to 999°F/555°C, or 0.0 to 999.0°F/555.0°C Default: 0°

• Integral [``It]: Select a value (minutes/repeat) for the integral function. Integral is the inverse of Reset; It(value) =

1/Reset(value).

Range: 0.00 to 99.99 minutes/repeat Default: 5.00 minutes/repeat

• Derivative [``dE]: Select a value (minutes) for the derivative function.

Range: 0.00 to 9.99 minutes Default: 0.00 minutes

• Calibration Offset [`CAL]: Eliminates the difference between the displayed process temperature and the actual

process temperature value.

Range: -999 to 9999°F/C, or -99.9 to 999.9F/C Default: 0°

Watlow Series 935B User’s Manual 15

Page 16

16 Watlow Series 935B User’s Manual

Table 5 - PID Menu Overview

Set-Up Heat

Proportional Band Heat - Select a heat proportional band value.

[```0] [`999] [```0] [`555] [``)0] [99(0] [``)0] [55%0]

0°F to 999°F, or 0°C to 555°C, or 0.0°F to 999.0°F, or 0.0°C to 555.0°C

Hysteresis Heat - Select a heat ON/off control switching hysteresis.

[```1] [`999] [```1] [`555] [``)1] [99(0] [``)1] [55%0]

1°F to 999°F, or 1°C to 555°C, or 0.1°F to 999.0°F, or 0.1°C to 555.0°C

Cycle Time Heat - Select a heat output cycle time.

[``)1] [`6)0] [``%0] [`6)0

0.1 to 60.0 seconds 5.0 to 60.0 seconds (SSR or Switched dc) (Electromechanical Relay)

Dead Band - Select a dead band value.

[```0] [`999] [```0] [`555] [``)0] [99(0] [``)0] [55%0]

0°F to 999°F, or 0°C to 555°C, or 0.0°F to 999.0°F, or 0.0°C to 555.0°C

Set-Up Cool

Proportional Band Cool - Select a cool proportional band value.

[```0] [`999] [```0] [`555] [``)0] [99(0] [``)0] [55%0

0°F to 999°F, or 0°C to 555°C, or 0.0°F to 999.0°F, or 0.0°C to 555.0°C

Hysteresis Cool - Select a cool ON/off control switching hysteresis.

[```1] [`999] [```1] [`555] [``)1] [99(0] [``)1] [55%0

1°F to 999°F, or 1°C to 555°C, or 0.1°F to 999.0°, or 0.1°C to 555.0°C

Cycle Time Cool - Select a cool output cycle time.

[``)1] [`6)0] [``%0] [`6)0

0.1 to 60.0 seconds 5.0 to 60.0 seconds (SSR or Switched dc) (Electromechanical Relay)

[Pb`h]

[hySh]

[Ct`h]

[``db]

[Pb`c]

[hySc]

[Ct`c]

Learn the PID Menu - Details

Page 17

Watlow Series 935B User’s Manual 17

Set-Up General

Integral Function - Select an integral value.

[`)00] [9(99]

0.00 to 99.99 minutes/repeat

Derivative Function - Select a derivative value.

[`)00] [`(99

0.00 to 9.99 minutes

Calibration Offset - Select a calibration offset value.

[-999]] [9999] [-9(9] [99(9

-999° to 9999°F or C or -99.9° to 999.9°F or C

NOTE: Access to the PID Menu and the prompts there varies with lockout function and output set-up. The PID Menu is locked out when the 935B leaves the factory.

• Lockout function; the Lockout Tag [`tAg] function masks menus from view (if you cannot see a prompt, you can

make no change). See Using Lockout Functions, p. 20.

• Output set-up; you must choose [hEAt] or [COOL] in either Output 1 or Output 2 to have access to the PID Menu. With a [hEAt] only choice, [COOL] prompts are not visible, and vice versa. See the Valid Output Functions Table, p. 5, or Setting Up Inputs and Outputs, p. 22.

[``It]

[``dE]

[`CAL]

Page 18

18 Watlow Series 935B User’s Manual

The Configuration Menu is the second sub-menu in the Operations Menu. Use it to set Inputs, Ranges, Output Types, Alarms, Timer, Failure Mode, and Lockouts.

To go to the Configuration Menu:

1. Go first to the Operations Menu by pressing . and , simultaneously for three seconds.

2. Scroll through the Operations Menu with , until you see the [CnFg] prompt.

3. While holding ß to display [``no], choose [`YES] with . or ,.

4. Release ß to see the first [CnFg] prompt, [``In].

5. To leave the Configuration Menu, press . and , for 3 seconds.

Table 6 - Configuration Menu Overview

Input Type - Choose sensor type. See p. 23 for sensor ranges.

[```J] [```H] [```t] [```n] [```E] [```S] [`rtd] [`r†d]

J t/c K t/c T t/c N t/c E t/c S t/c 1.0° RTD 0.1° RTD

Celsius/Fahrenheit - Choose displayed unit of measure.

[``°F] [``°C]

°F °C

Input Range Low - Select lowest displayable set point. Ranges, p. 23.

[``In] [``rh]

Select a value (lowest displayable set point) between Input Type Range Low and Input Range High.

Input Range High - Select highest displayable set point. Ranges, p. 23.

[``Rl [``In]]

Select a value (highest displayable set point) between Input Type Range High and Input Range Low.

Output 1 Function - Choose Output 1 type; see Valid Outputs Table, p. 23

[hEAt] [COOL] [ALM] [nonE]]

Heat Cool Alarm None

Output 2 Function - Choose Output 2 type (dependent on Output 1 choice).

hEAt] [COOL] [ALM] [thM] [tMS] [nonE]

Heat Cool Alarm Timer Timer None

Hr./Min. Min./Sec

Remote Timer Start - Choose remote timer start operation.

[`off] [`fpl] [tmr]

Off Front Panel Countdown

Lock Timer

Display Default -

Choose the primary (last 2 characters) and secondary (first 2 characters) default displays. Press ßto toggle to the

secondary display for 15 seconds.

[``Ac] [AcSP] [Acti] [tiAc] [tiSP]

No secondary Actual temp. Actual temp. Time remaining Time remaining Actual temp. Set pnt temp. Time remaining Actual temp. Set point temperature

Alarm Type - Choose alarm type with output action.

[Prnc] [Prno] [dEnc] [dEno]

Process Process Deviation Deviation normally normally normally normally closed open closed open

[``In]

[`C_F]

[``rL]

[``rh]

[`Ot1]

[`Ot2]

[dISP]

[ALty]

Learn the Configuration Menu

[`rts]

Page 19

Watlow Series 935B User’s Manual 19

NOTE:

Access to Configuration Menu varies with lockout function. See p. 21.

Alarm Hysteresis - Choose alarm switching band.

[```1[ [`999] [```1] [`555] [``)1] [99(0] [``)1] [55%0]

1°F to 999°F, or 1 °C to 555°C, or 0.1°F to 999.0°F, or 0.1°C to 555.0°C

Alarm Latch - Choose latching or non-latching alarms. A latching alarm requires a ß press to clear it after the alarm condition clears.

[``no] [`YES]

NO YES

Alarm Silencing - Choose to silence alarms on startup, or not.

[`SIL] = [`YES] silence an alarm with a ß press.

[``no] [`YES

NO YES

Failure Mode - Choose output action after a sensor failure. Bumpless transfer provides a smooth transition to percent power control without output state change.

[bPLS] [-100] [`100]

Bumpless Percent Power

Timer Output Function - Choose output function for the end of the timer. Delay ON = Turn ON, Delay Off = Turn off, Signal ON = Toggle ON, Signal off = Toggle off

[dLon] [dLoF] [SGon] [SGof]

Delay Delay Signal Signal on Off On Off

Start Timer Function - Choose the start timer conditions:

[IMd] = Immediate start on a , press; [`rdy] =, press and Actual temp. is inside the Ready Band; [rdYA] = , press,

plus Actual temp. is inside the Ready Band, then acknowledge with a ß press;

[PWr] = immediate start on power-up without waiting for Ready Band temp. or a , press.

[IMd] [`rdY] [rdYA] [PWr]

Immediate Ready Ready Power

Acknowledge

Timer Ready Band - If [Strt] = [`rdY] or [rdYA], select ready band high/low values.

[```0] [`999] [```0] [`555] [``)0] [99(0] [``)0] [55%0]

0°F to 999°F, or 0°C to 555°C, or 0.0°F to 999.0°F, or 0.0°C to 555.0°C

Signal Time - If [tIM] = [SGon] or [SGoF], select a Signal ON or Signal off time duration

to trigger an annunciator or other action at completion of countdown time.

[```1] [9959]

1 sec. to 99:59 min:sec.

Set Point Lock - Choose to lock the Primary Set Point from change, not view.

[``no] [`YES]

NO YES

Lockout Tag - Choose undisplayable/unchangeable menus; [PCOA] = all locked.

[PCOA] [PCO`] [PC`A] [PC``] [P`OA] [P`O`] [P``A] [P```] [`COa] [`CO`] [`C`A] [`C``] [``OA] [``O`] [```A] [````]

Choose the menus / function that will not be displayed, and therefore cannot be changed. P = PID Menu, C = Configuration Menu (except [`tAG]), O = Operations Menu (except [CnFG]), A = Auto-tune.

[AhyS]

[`LAt]

[`SIL]

[FAIL]

[tIM]

[Strt]

[`rdy]

[``St]

[SLOC]

[`tAg]

Page 20

20 Watlow Series 935B User’s Manual

Key Lockout Information

The Series 935B offers three different security, or “lockout,” options. Set up one or all three lockout options in the Configuration Menu.

• Front Panel Lock [`FPL] uses an input for an external hardware switch; it requires wiring, see p. 25. Choose Front Panel Lock [`FPL] from the

[`rts] choices.

• Choose Set Point Lock [SLOC] as the simplest lockout option. It locks the Primary Set Point from change, but not from view.

• Choose the Security Tag [`tAG] as a means of masking the Series 935B software menus from view. By selecting all or part of the four-digit binary acronym, [PCOA] (Proportional / Configuration / Operation / Autotune), you can choose to mask those items from view, and therefore from change. For example: In the Configuration Menu [`tAG] set-up, if you can see the P, the operator cannot see the PID menu.

• Exceptions to [PCOA] [`tAG] are:

“C” does not lock out [`tAG] . “O” does not lock out [CnFG] .

Configuration Menu

[``In]

Input Type

[`C_F]

Celsius/Fahrenheit

[``rL]

Input Range Low

[``rh]

Input Range High

[`Ot1]

✓

Output 1 Function

[`Ot2]

Output 2 Function

[`rts]

Remote Timer Start

[dISP]

Display Default

[ALty]

Alarm Type

[AhYS]

Alarm Hysteresis

[`LAt]

Alarm Latch

[`SIL]

Alarm Silencing

[FAIL]

Failure Mode

[tIM]

Timer Function

[Strt]

Start Timer

[`rdY]

Timer Ready Band

[``St]

Signal Time

[SLOC]

✓

Set Point Lockout

[`tAG]

✓

Lockout Tag

Using Lockout Functions

Page 21

Watlow Series 935B User’s Manual 21

View Process Yes Yes Yes Ye s Yes Ye s Yes

View Set Point Yes Yes Yes Yes Yes Yes Yes

Change Set Point No Yes No Yes Yes Yes Yes

Auto-tune No Yes Yes Ye s Yes Ye s No

View, Change Operation Menu No Yes Yes Ye s Yes No Yes

View, Change Configuration Menu

(except tag) No Yes Yes Ye s No Yes Yes

View, Change PID No Yes Yes No Yes Yes Yes

= No Lockout

= Fully Locked

= Operator's Perspective

Set Point LockoutFront Panel Lockout Security Tag

Three Lockout Options Detailed

P = PID Menu, C = Configuration Menu

(except [`tag]),

O = Operations Menu

(except

[CnFG]

A = Auto-tune

Table 7 - Series 935B Lockout Options

[`rts] [SLOC] [`tAG]

[`fpl]

[`YES] [P```] [`C``] [``O`]

[[```A]

[``no]

Note: Front Panel Lockout requires an external hardware switch. For

[`FPL] set-up and wiring information, see p. 25.

For more wiring information, see p. 45.

[`fpl]

SET

RDY

[slOC]

[````] [PCOA]

Page 22

22 Watlow Series 935B User’s Manual

Setting Inputs and Outputs

Key Input/Output Set-up Information

• All initial input and output set-up occurs in the Configuration Menu.

• Indication of °C or °F units of measure occurs only in the [`C_F] prompt.

• Sensor input type minimum and maximum range (see p. 53) is further

defined with Range Low [``rL] and Range High [``rh] to set the working span of set points and remote set point scaling.

• Output 1 and Output 2 configure the prime functions of the Series 935B, they are the “golden” prompts.

• Output 1 must be heat or cool to use Output 2 as a timer.

• Front Panel Lock [`FPL] requires a customer-supplied external switch

wired on Terminals 3 and 4. Switch open = unlocked; closed = locked. Select this feature with [`rts] = [`fpl].

• Remote Timer Start requires a customer-supplied switch on Terminals 3 and 4. Switch closed= start. Select this feature with [`rts] = [tmr].

• Output 2 sets timer interval in hours:minutes [thM] or minutes:seconds [tMS].

•

Display Default [dISP] lets you choose the primary (last 2 characters) and secondary (first 2 characters) default displays. Press

to toggle to the

secondary display for 15 seconds.

[``Ac] = Normal Display: Actual Temperature

Secondary: None

[AcSP] = Normal Display: Set Point Temperature

Secondary: Actual Temperature

[Acti] = Normal Display: Time Remaining

Secondary: Actual Temperature

[TiAc] = Normal Display: Actual Temperature

Secondary: Time Remaining

[tiSP] = Normal Display: Set Point Temperature

Secondary: Time Remaining

Configuration Menu

[``In]

✓

Input Type

[`C_F]

✓

Celsius/Fahrenheit

[``rL]

✓

Input Range Low

[``rh]

✓

Input Range High

[`Ot1]

✓

Output 1 Function

[`Ot2]

✓

Output 2 Function

[`rts]

✓

Remote Timer Start

[dISP]

✓

Display Default

[ALty]

Alarm Type

[AhYs]

Alarm Hysteresis

[`LAt]

Alarm Latch

[`SIL]

Alarm Silencing

[FAIL]

Failure Mode

[tIM]

Timer Function

[Strt]

Start Timer

[`rdY]

Timer Ready Band

[``St]

Signal Time

[SLOC]

Set Point Lockout

[`tAG]

Lockout Tag

Page 23

Watlow Series 935B User’s Manual 23

Table 8 - Setting Inputs and Outputs

NOTE:

Access to Configuration Menu varies with lockout function. See p. 21.

Input Type - Choose sensor type.

[```J] [```H] [```t] [```n] [```E] [```S] [`rtd] [`r†d]

J t/c K t/c T t/c N t/c E t/c S t/c 1.0° RTD 0.1° RTD

Celsius/Fahrenheit - Choose displayed unit of measure.

[``°F] [``°C]

°F °C

Input Range Low - Select lowest displayable Set Point, dependent on [``In].

[``In] [``rh] Select a value (lowest displayable set point) between

Input Type Range Low and Input Range High.

Input Range High - Select highest displayable Set Point, dependent on [``In].

[``rL] [``In] Select a value (highest displayable set point) between

Input Type Range High and Input Range Low.

Output 1 Function - Choose Output 1 type.

[hEAt] [COOL] [ALM] [nonE]

Heat Cool Alarm None

Output 2 Function - Choose Output 2 type (dependent on Output 1 choice).

[hEAt] [COOL] [ALM] [thM] [tMS] [nonE]

Heat Cool Alarm Timer Timer None

Hr./Min. Min./Sec

Remote Timer Start - Choose Off, Front Panel Lock, or Timer (Hrs:Min).

[`off] [`fpl] [tmr]

Off Front Panel Timer

Lock

Display Default -

Choose the primary (last 2 characters) and secondary (first 2 characters) default displays. Press

ß to toggle to the secondary display for 15 seconds.

[``Ac] [[AcSP]] [Acti] [tiAc] [tiSP]

No secondary Actual temp. Actual temp. Time remaining Time remaining Actual temp. Set pnt temp. Time remaining Actual temp. Set point temperature

Input Range Information

J t/c: 32 to 1382°F or 0 to 750°C K t/c: -328 to 2282°F or -200 to 1250°C T t/c: -328 to 662°F or -200 to 350°C N t/c: 32 to 2282°F or 0 to 1250°C S t/c: 32 to 2642°F or 0 to 1450°C E t/c: -328 to 1470°F or -200 to 799°C 1° RTD (DIN): -328 to 1292°F or -200 to 700°C

0.1° RTD: -99.9 to 999.9°F or -99.9 to 700.0°C

Valid Output Functions

First select Output 1: Then select Output 2: Heat None, Cool, Alarm, Timer Cool None, Heat, Alarm, Timer Alarm None, Heat, Cool None Heat, Cool, Alarm

• The function of Output 1 determines the options available for Output 2.

• First select the function of Output 1. Refer to the table (right), then select the function of Output 2.

[``In]

[`C_F]

[``rL]

[``rh]

[`rts]

[`Ot2]

[dISP]

Configuration Menu

[`Ot1]

Page 24

(Closed switch = Starts Timer)

Figure 5 - Remote Timer Start Wiring

See p. 45 for more wiring information.

24 Watlow Series 935B User’s Manual

To Set Up Remote Timer Start…

1. Wire the control per the example below and the information on p. 44-45.

2. Make [``In] and [`C_F] choices, then

3. Select [`tmr] at the [`rts] prompt.

4. Close switch to remotely start the timer.

WARNING: All wiring and fusing must conform to local and national electric codes. Contact local authorities for further information. Failure to comply with electric codes could result in injury or death, or damage to property.

Configuration Menu

[``In]

✓

Input Type

[`C-F]

✓

Celsius/Fahrenheit

[``rL]

Input Range Low

[``rh]

Input Range High

[`Ot1]

✓

Output 1 Function

[`Ot2]

Output 2 Function

[`rts]

✓

Remote Timer Start

[dISP]

Display Default

•

[FAIL]

Failure Mode

[SLOC]

Set Point Lockout

[`TAG]

Lockout Tag

Operations Menu

[`Aut]

Auto-tune

[`L-r]

Local / Remote

[`Pid]

PID

[CnFG]

Configuration

Using Remote Timer Start Input

Note:

Note: Customer -supplied N.O. momentary switch.

O T S

Load 1

Load 2

O M

–1+

Page 25

Watlow Series 935B User’s Manual 25

(Closed switch = locked panel)

To Set Up Front Panel Lock…

1. Install an external switch.

2. Wire the control per the example below and the information on p. 44-45.

3. Go to [CnFG] menu, then [`rts] prompt, and choose [`FPL].

Figure 6 - Front Panel Lock Wiring

See p. 44 and 45 for more wiring information.

[`rts] = [`FPL]

View Process Yes View Set Point Yes Change Set Point No Auto-tune No Reset Alarm Yes View or Change Operation No

Menu (Except Config. Menu) View or Change Configuration No

Menu (Except Tag) View or Change PID Menu No

Table 9 - Using Front Panel Lock

Configuration Menu

[``In]

Input Type

[`C_F]

Celsius/Fahrenheit

[``rL]

Input Range Low

[``rh]

Input Range High

[`Ot1]

Output 1 Function

[`Ot2]

Output 2 Function

[`rts]

✓

Remote Timer Start

[dISP]

Display Default

•

[FAIL]

Failure Mode

[tIM

Timer Function

[Strt]

Start Timer

[`rdY]

Timer Ready Band

[``St]

Signal Time

[SLOC]

Set Point Lockout

[`tAG]

Lockout Tag

[`rts] [`FPL]

Using Front Panel Lockout

Note: Customer-supplied two-position switch.

Note:

Load 1

Load 2

RDY

[`fpl]

SET

C O

–1+

Page 26

26 Watlow Series 935B User’s Manual

Configuration Menu

[``In]

Input Type

[`C_F]

Celsius/Fahrenheit

[``rL]

Input Range Low

[``rh]

Input Range High

[`Ot1]

Output 1 Function

[`Ot2]

Output 2 Function

[`rts]

Remote Timer Start

[dISP]

Display Default

[ALtY]

✓

Alarm Type

[AhYS]

✓

Alarm Hysteresis

[`LAt]

✓

Alarm Latch

[`SIL]

✓

Alarm Silencing

[FAIL]

Failure Mode

Operations Menu

[`Aut]

Auto-tune

[`ALO]

✓

Alarm Range Low

[`AhI]

✓

Alarm Range High

[`Pid]

PID

[CnFG]

Configuration

Key Alarm Information

Alarms signal an excursion from normal operating conditions. In general, audible alarms or lights connected to alarm outputs will signal a problem. In the 935B the front panel LED “1” or “2” indicates an alarm with [``hI] or

[``LO] flashing on the main display.

• Process alarms use absolute high and low values to trigger an alarm. Use this alarm type if your process may be subject to temperatures that it must not exceed. Use [`AhI] and [`ALO] to set alarm points at or near these values. See Table 10: [ALtY], next page.

• Deviation alarms are triggered by a deviation from the set point. The alarm high value [`AhI] is the deviation above set point, and the low value [`ALO] is the deviation below set point. Whenever the set point is adjusted, the alarm settings are relative to that value. Deviation alarms use the currently controlling set point, whether primary, remote, idle, or 90% of primary, during auto-tuning. See Table 10: [ALtY], next page.

• Normally Open, [dEno] or [Prno], Alarms energize

the alarm output when an alarm condition occurs, and de-energize it when cleared. Use this type to activate external devices such as audible alarms or lights. See Table 10: [ALtY, next page.

• Normally Closed, [dEnc] or [Prnc], Alarms de-energize

the alarm output when an alarm condition occurs, and energize it when the alarm is cleared. Use this type as a “deadman” switch where system continuity is required for operation. See Table 10: [ALtY], next page.

For example, by running the control output through the alarm output, you can set a normally closed process alarm to disable the process when the process exceeds the alarm set point. The alarm output will be off when power is off.

• Alarm Hysteresis sets a point the process must pass on a return (from

an alarm condition excursion) to the [`ALO] and [`AhI] points before the alarm can clear. This prevents the alarm output from “chattering” if the process is hovering around the alarm set point. See Table 10: [AhYS], next page.

• Latching Alarms require the operator to clear them with a ß press

after the process returns to a safe, or non-alarm condition. Non-latching alarms self-clear. See Table 11: [`LAt], p. 29.

• Silenced Alarms provide a means to clear the alarm output with a ß press even if the alarm condition still exists. The flashing [``hI] or

[``LO] message will persist until the alarm condition ceases. See Table

11: [`SIL], p. 29. If [`SIL] = [`YES], alarms are disabled (no message or output) on startup until the safe area is reached.

• Alarm High and Low Points, [`AhI] and [`ALO], in the Operations menu determine where alarms will trigger. Alarm hysteresis [AhYS] determines where an alarm condition clears. See Table 11, page 29.

Learning Alarms

Page 27

Set Point

Deviation normally closed

Deviation normally open

Process normally closed

Process normally open

Non-Alarm State

LED off Alarm Output:

Alarm State

LED on Alarm Output Status:

Function

A deviation alarm tracks set point.

A process alarm is a fixed value, independent of set point.

Alarm High Region

Alarm Low Region

Safe Area

Alarm Type

Alarm Hysteresis is the change in the process variable (actual) required to clear the alarm relay after an alarm occurs.

Alarm High Region

Alarm Low Region

Silenced-Alarm State

LED off Alarm Output Status:

Power-Off State

LED off Alarm Output Status:

Deviation Alarm Process Alarm

Watlow Series 935B User’s Manual 27

Table 10 - Alarm Functions

Note: With no power connected to the unit, the alarm output will be in an open state.

• To Clear an Alarm that is latched or “silence-able’ requires the operator to press the ß key after

the process returns to a safe, or non-alarm condition. Non-latching alarms self-clear. See Table 11:

[`LAt] and [`SIL], p. 29.

Table 10 (below) and Table 11 (p. 29) illustrate the Series 935B alarm features.

[denc]

[deno] [prnc]

[prno]

[ahy5]

[alty]

[ahty]

[ahy5]

[`al0]

[`ah1]

Page 28

28 Watlow Series 935B User’s Manual

To Set Up Series 935B Alarms…

1. Plan an alarm strategy. What do you

want to happen when an alarm occurs?

2. Wire the appropriate control output, Output 1 or Output 2, and associ-

ated switching and annunciators. See p. 44-45 for wiring information.

3. Go to the 935B’s Configuration Menu

[CnFG]. See p. 18.

4. Set either Output 1

[`Ot1] or Output 2 [`Ot2] as the [ALM] output.

5. Set Alarm Type

[ALty].

6. Set alarm hysteresis

[AhYS].

7. Set alarm latching

[`LAt].

8. Set alarm silencing

[`SIL].

9. Set a failure mode

[FAIL]. See p. 38-39.

10. Go to the 935B’s Operation Menu. See p.12.

11. Set the alarm high and low

[`ALO] and [`AhI] points.

12. Test and adjust the alarm system.

13. Document the alarm settings and system.

CAUTION: Verify, in Table 10, p. 27, the alarm state / alarm output condition you want before making the Alarm Type

[ALty] choice.

Failure to do so could result in damage to equipment and property.

WARNING: Do not rely on the Series 935B alarms to provide redundant temperature limit control. Use correctly specified, properly installed temperature limit controls instead. Failure to do so could result in injury, death or damage to equipment and property. (See accompanying Watlow Bulletin 89.4.3.)

To Clear a Series 935B Alarm…

In general, press the ß key to clear a latched or ‘silence-able’ ([`sil] =

[yes]) alarm.

Ultimately, the system process value must return within the safe area for the alarm to remain clear. Non-latching alarms self-clear.

Configuration Menu

[``In]

Input Type

[`C_F]

Celsius/Fahrenheit

[``rL]

Input Range Low

[``rh]

Input Range High

[`Ot1]

Output 1 Function

[`Ot2]

Output 2 Function

[`rts]

Remote Timer Start

[dISP]

Display Default

[AltY]

✓

Alarm Type

[AhYS]

✓

Alarm Hysteresis

[`LAt]

✓

Alarm Latch

[`SIL]

✓

Alarm Silencing

[FAIL]

Failure Mode

Operations Menu

[`Aut]

Auto-tune

[`ALO]

✓

Alarm Range Low

[`AhI]

✓

Alarm Range High

[`Pid]

PID

[CnFG]

Configuration

Setting and Clearing Alarms

Page 29

Watlow Series 935B User’s Manual 29

Table 11 (below) and Table 10 (p. 27) illustrate the Series 935B alarm features.

Table 11 - Alarm FunctionsTable 11 - Alarm Functions

[`lat]

Latching alarm

[`sIl]

Silence alarm

[`alO]

Alarm Low

[``no]

An unlatched alarm self-clears when actual temperature returns to within the safe area.

[``no]

With this selection, an alarm cannot be silenced at the 935B front panel (unless the alarm is latched [[~LAt]=[yes] ], and the alarm condition no longer exists).

A value from input Range Low to [`AhI].

At the Range Low value, a

displays [`off] and [`ahi] disables.

, press

[`yes]

A latched alarm requires the operator to press the ß key to clear after the actual temperature returns to within the safe area.

[`yes]

With this selection, an alarm can be silenced by pressing the

ß] key. [yes] provides automatic

alarm silencing on start up.

SET

[`ahI]

Alarm High

A value from [`alo] to input Range High

At the Range High value, a . press

displays [`off] and [`ahi] disables.

Page 30

30 Watlow Series 935B User’s Manual

Configuration Menu

[``In]

Input Type

[`C_F]

Celsius/Fahrenheit

[``rL]

Input Range Low

[``rH]

Input Range High

[`Ot1]

Output 1 Function

[`Ot2]

✓

Output 2 Function

[`rts]

✓

Remote Timer Start

[dISP]

✓

Display Default

[ALtY]

Alarm Type

[AhYS]

Alarm Hysteresis

•

[tIM]

✓

Timer Function

[Strt]

✓

Start Timer

[`rdY]

✓

Timer Ready Band

[``St]

✓

Signal Time

Operations Menu

[`Aut]

Auto-tune

[tMr]

✓

Countdown Timer

[IdLE]

✓

Idle

Key Timer Information

• The timer requires Output 1 to work as either a heat or as a cool output.

• The 935B timer is a function of Output 2, a switched dc output.

• Hours: minutes (hh:mm) or minutes:seconds (mm:ss)

choices reside in Output 2 [`Ot2].

• Timer set-up occurs in two locations, in the Configuration Menu and the Operations Menu.

• , starts the timer.

• . stops the timer.

• [dISP] choices set up the timer display (see p. 18).

• LED colon flashes when timer runs.

LED colon ON steadily when timer is not running.

Configuration Menu set-up includes: (see p. 18)

• Output 1 [`Ot1]; heat [hEAt] or cool [COOL]

• Output 2 [`Ot2]; timing interval,

hours:minutes [thM], or minutes:seconds [tMS]

• Remote Timer Start [`rts] choices:

1. Manual start [`off]

2. Remote Timer Start [tmr]

3. Front Panel Lockout [`fpl]

• Timer (Output 2) function [tIM] hours: minutes or minutes:seconds ([thm] or [tms]) can perform one of four possible actions after timing:

1. Turn ON, also called, “delay ON” [dLon]

2. Turn off, also called, “delay off” [dLof]

3. Toggle ON, also called, “signal ON” [sgon]

4. Toggle off, also called, “signal off” [sgof]

• Start timer function [Strt] choices:

1. Immediate start [IMd]

2. Start once inside a ready band [`rdy]

3. Start once inside a ready band,

acknowledging [rdya] with a ß press

4. Start immediately on control power up [PWr] without waiting for

Ready Band temp. or , press.

• Ready band width [`rdy] above and below set point: degrees

• Signal time [``St] (if applicable) duration: seconds

Operations Menu set-up includes: (see p. 12)

• Countdown Time [tMr]: hours:minutes or minutes:seconds

• Idle Set Point Type [IdLE], two choices:

1. Track primary set point

2. Set an idle set point

The next page presents this information in graphic format with additional detail.

15 45

Learn the Countdown Timer

Page 31

Watlow Series 935B User’s Manual 31

Table 12 - Series 935B Timer Functions/Settings

• When [Ot2] = [thm] or [tms], a 3 second

ß press will display

the [idle] set point.

Choose time in hr:min or min:sec.

Timer set-up available only when

Output 2 Timer Output Function;

Choose one of four possible output actions for the end of the timer / time periods.

Start Timer Function

Remote Start Timer

Timer Ready Band

Delay ON

Output 2 is ON before timing; OFF during timing; ON after timing.

Timer starts immediately on a key press at the normal display.

Timer only runs in the Ready Band. key starts timer sequence.

Ready Acknowledge. key starts timer sequence. must be pressed once inside the Ready Band to start timer at the normal display.

Timer starts immediately on control Power up. See p.57.

No remote timer start or front panel lock feature.

Front panel lock with a customer-supplied switch on Terminals 3 and 4; a closed switch=locked front panel.

Start timer via an external, cusomer-supplied switch on Terminals 3 and 4 closed switch=start.

Signal Time

Delay OFF Signal ON Signal OFF

Output 2 is OFF before timing; ON during timing; OFF after timing.

RDY

Output 2 is OFF before & during timing; ON after timing; then OFF.

• = 0, Disables Ready feature

• The RDY front panel LED is lit

RDY

inside Ready Band

Sets the signal time from 00:01 to 99:59 min:sec to run after Timer.

Output 2 is ON before & during timing; OFF after timing; then ON.

SET

Operations Menu

Idle Set Point

Timer Function OFF.

Idle

• Idle is set point used when not timing.

• If Trac selected Idle is the same as Set Point.

• The Set Point value controls the process during the Timer sequence.

Countdown Time

Page 32

32 Watlow Series 935B User’s Manual

15 45

To Set Up the 935B Timer…

1. Plan a timer strategy.

2. Wire the Output 2 control output, associated

switching devices and annunciators. See p. 44-45.

3. Go to the 935B’s Configuration Menu [CnFG].

4. Choose the Output 2 [`Ot2] function as time;

hrs:min [thM], or time; min:sec [tMS].

5. Choose Remote Timer Start [`rts] to function as; manual [`off], or remote timer start [tMr].

6. Choose a display default [dISP] (see page 18):

• Actual Temperature only [``Ac]

• Actual; Set Point [AcSP]

• Actual; Time [Acti]

• Time; Actual [tiAc]

• Time; Set Point [tiSP]

7. Choose a Timer Output Function [tIM]:

• Delay ON [dLon]

• Delay off [dLoF]

• Signal ON [sgon]

• Signal off [sgoF]

8. Choose a start timer [Strt] function; either immediate [IMd], ready band [`rdY], Ready Acknowledge [rdYA], or Power [PWr].

9. If you chose [`rdY] or [rdya], then select a ready band [`rdy] value.

10. If you chose [SGon] or [sgof], then select a signal time [``St] value.

11. Go to the 935B’s Operation Menu.

12. Set the countdown time [tMr].

13. Choose the idle set point [IdLE] to track [trAc]

the primary set point, or select a separate idle set point value between the range high [``rh] and range low [``rL] values.

14. Run the system, and test the timer start with a , press or [`rts] signal.

15. Document the timer settings and system.

Configuration Menu

[``In]

Input Type

[`C_F]

Celsius/Fahrenheit

[``rL]

Input Range Low

[``rh]

Input Range High

[`Ot1]

Output 1 Function

[`Ot2]

✓

Output 2 Function

[`rts]

✓

Remote Timer Start

[dISP]

✓

Display Default

[ALty]

Alarm Type

[AhYS]

Alarm Hysteresis

•

[tIM]

✓

Timer Function

[Strt]

✓

Start Timer

[`rdY]

✓

Timer Ready Band

[``St]

✓

Signal Time

Operations Menu

[`Aut]

Auto-tune

[tMr]

✓

Countdown Timer

[IdLE]

✓

Idle

Setting the Countdown Timer

Page 33

Watlow Series 935B User’s Manual 33

15 45

Convection Oven Application

Scenario

A master chef bakes bread at 350°F for 30 minutes. He wants the oven at the proper temperature with an indication when it is ready to begin baking. He isn't concerned if the oven is 10° cool at first. After he loads the oven, the chef wants to start the countdown time by pressing a key. When the baking time is complete, he wants a 10 second audible indication that the bread is done.

Recommended Control

A Series 935B-1CCX

-000X control.

• Switched dc Output 1 wired to a dc input solid state relay (SSR) switches the heaters.

• Switched dc Output 2 wired to a DC SSR-T0 SSR-240-10A-DC1 or A External Mechanical Relay audible indicator provides “done” indication.

Configuration Menu Set-up

[`C_F] = [``°f] °F [dIsp] = [Acti] After a ß press, actual temperature appears for 15 seconds. [`Ot1] = [hEAt] Heating output [`Ot2] = [tMS] Time; minutes:seconds [`rts] = [`off] RTS must be set to OFF in this application [tIM] = [SGon] Output 2 turns ON briefly at the end of the timing cycle. [Strt] = [rdYA] Timer waits to countdown until temperature deviation

from set point <

[`rdy] value and the ß key is pressed.

[`rdY] = [``10] Ready band; 10°F [``St] = [``10] Output 2 turns ON for 10 sec. at the end of the timing cycle.

Operations Menu Set-up

[tMr] = [3000] Bake time; 30 minutes [IdLE] = [``75] The set point temperature before a timing cycle starts and

after a timing cycle completes.

Set Point = [`350°F

Operator/Control Actions

• With the oven "idling" at 75°F, the chef starts the preheat cycle with a , press. The display immediately shows 30:00 with the colon ON steadily. The RDY LED is off. Series 935B begins to control to the 350°F bake set point.

• As the actual oven temperature increases to within the Ready Band at 350°F ±10°F, the RDY LED turns on. The chef loads the oven and presses ß to acknowledge the Ready Band and thereby start the bake cycle.

• Time starts counting down. Actual temperature displays for 15 seconds after the ß key is press. Then time displays with the colon flashing.

• If temperature deviates out of the Ready Band (less than 340°F or more than 360°F), timer countdown will pause, but will continue as soon as temperature re-enters the ready band.

• When time reaches 00:00, Output 2 turns on for 10 seconds sounding the audible indicator. The chef can stop the audible indicator by pressing .. The Series 935B then automatically shifts to the 75°F idle set point.

Timer Example Application

Page 34

34 Watlow Series 935B User’s Manual

Auto-tuning

Manual Tuning

For optimum performance, tune the Series 935B to your thermal system. The settings here are for a broad spectrum of applications; your system may have different requirements.

Tune heating outputs at a set point above ambient temperature. Tune cooling outputs at a set point below ambient temp.

1. Apply power to the 935B and enter a set point.

In the Operations Menu, [`Aut] must = [``no]. Begin with these Configuration Menu settings:

[Pb`h = [```1], [``1t] = [`000], [``dE] = [`000], [Ct`h] = [``50], [`CAL] = [```0].

2. Proportional Band Adjustment: Gradually increase [Pb`h] until the upper

display temp. stabilizes at a constant value.

3. Integral Adjustment: Gradually decrease [``It] from 30.00 until the dis-

play temperature begins to oscillate or “hunt.” Then slowly increase

[``It] until the upper display stabilizes again near set point.

4. Cycle Time Adjustment: Set [Ct`h] as required. Faster cycle times some-

times achieve the best system control. However, if a mechanical contactor or solenoid is switching power to the load, a longer cycle time will minimize wear on relays.

5. Derivative Adjustment: Increase [``dE] to 0.10 minute. Then raise set

point by 20° to 30°F, or 11° to 17°C. Observe approach to set point. If load temperature overshoots, increase [``dE] by 0.50 minute. Raise set point by 20 to 30°F, or 11 to 17°C and watch approach again. Repeat until system rises to new set point appropriately.

6. Calibration Offset Adjustment: Enter the [`CAL] offset value you want.

Calibration offset adds or subtracts degrees from the value of the input signal.

Auto-tuning the Series 935B

Auto-tune automatically sets PID parameters for your system.

1. Press . and , for three seconds.

2. You'll see [`Aut

3. Press and hold ß, then select [`YES] with . or ,.

[tune]

will

flash to indicate auto-tuning. Display reverts to normal after auto-tuning.

4. [`Aut] = [``no] stops auto-tuning.

NOTE:

[`Aut] is

not visible at factory default.

CAUTION: Successful Series 935B auto-tuning requires 3 oscillations thru the 90% set point in 85 min. or less. If the system cannot perform the oscillations in that time, the control will revert to the previous PID values.

NOTE: Manual tuning is a slow

procedure, taking from minutes to hours to obtain optimum value.

Figure 7 - Auto-tuning the Series 935B

Temperature

Time

90%

Set Point

Operations Menu

[`Aut]

✓

Auto-tune

[`ALO]

Alarm Range Low

[`Ah1]

Alarm Range High

[tMr]

Countdown Timer

[IdLE]

Idle

[`L-r]

Local / Remote

[`Pid]

PID

[CnFg]

Configuration

Auto-tuning occurs at 90% of set point in less than or

equal to 85 minutes ç

Page 35

Watlow Series 935B User’s Manual 35

Tweaking PID Settings

1. Set [Pb`h] and [Ct`h] in degrees.

2. If Proportional Band Heat [Pb`h] = 0, Set Hysteresis Heat [HySh]. The Series 935B will

provide on/off control with the hysteresis value selected, and no proportioning action.

3. Proportional Bands should be decreased for tighter control but increased to eliminate oscillations.

4. Cycle Time Heat [Ct`h] is limited to a minimum of 5.0 seconds for the electromechanical relay to help reduce wear. The electromechanical relay (D, Output 2) is not recommended for PID control. It is warranted to 100,000 contact closures only. Alarm or on/off control are appropriate applications for the Series 935B's electromechanical relay output.

5. Set Dead Band [``db] to adjust the effective cool set point above the primary set point by the dead band value in degrees. In cool/heat applications, dead band prevents continuous cool output action by creating a buffer between heating and cooling output action.

6. Set [Pb`c] and [Ct`c] in degrees.

7. If Proportional Band Cool [Pb`c] = 0, Set Hysteresis Heat [HYSc]. The Series 935B will

provide on/off control with the hysteresis value selected, and no proportioning action.

8. Proportional Bands should be decreased for tighter control but increased to eliminate oscillations.

9. Cycle Time Heat [Ct`h] is limited to a minimum of 5.0 seconds for the electromechanical relay to help reduce wear. The electromechanical relay (D, Output 2) is not recommended for PID control. It is warranted to 100,000 contact closures only. Alarm or on/off control are appropriate applications for the Series 935B's electromechanical relay output.

10. Set Integral [``It] to eliminate droop in the system. Lower the value for more droop reduction. Adjustable from 0 to 99.9 minutes / repeat.

11. Set Derivative [``dE] to prevent overshoot. Increasing the value slows the approach to set point. Adjustable from 0 to 9.99 minutes.

12. Calibration Offset [`Cal] eliminates the difference between the displayed process temperature and the actual process temperature value.

PID Menu

Set up Heat:

[Pb`h]

✓

Proportional Band

[hySh]

✓

Hysteresis

[Ct`h]

✓

Cycle Time

[``db]

✓

Dead Band

Set up Cool:

[Pb`c]

✓

Proportional Band

[hySc]

✓

Hysteresis

[Ct`c]

✓

Cycle Time

Set up General:

[``It]

✓

Integral

[``dE]

✓

Derivative

[`CAL]

✓

Calibration Offset

Page 36

36 Watlow Series 935B User’s Manual

Calibrating the 935B

Quick Calibration Restore:

Press all three keys simultaneously until

[tc50] appears in the

display, press . once and [`rSt] will appear in the display. Press and hold ß, the display will show

[``no], press . to

change display to

[`YES]. Press and

hold . and , for 3 seconds to exit the [`CAL] menu.

NOTE: Restore Factory Calibration

[`rSt] = [`YES]

restores factory calibration values to all calibration prompts.

Calibration Menu

[tc50]

✓

tc50

[tc00]

✓

tc00

[``tc]

✓

[r`15]

✓

r15

[r380]

✓

r380

[`rSt]

✓

rst

Calibration Key Information

Calibration requires a precision millivolt source with thermocouple compensation, an adjustable 0-10 volt source, and a decade resistance box.

• [tr50] and [tr00] calibrate the thermocouple span.

• [``tc] calibrates the ambient compensation.

• [r380] and [r`15] calibrate the RTD span.

• When calibrating, calibrate all points for consistency in results.

• Allow the unit to warm up for 15 minutes before calibrating.

Figure 8a Thermocouple Calibration

Figure 8b RTD Calibration

IN OUT

–1+

source

mV source = 50.000mV

• Store TC counts at 50.000mV

mV source = 0.000mV

• Store TC counts at 0.000mV

–

POWER

IN OUT

–1+

Decade

Box

Decade Box = 15.00 ohms

• Store low end RTD counts

mV source = 380.00 ohms

• Store high end RTD counts

–

POWER

mV source = Temp. Compensation

• Store ambient counts at 32° F. Type J.

• Restore factory calibration

Page 37

Watlow Series 935B User’s Manual 37

Calibrating the 935B

Thermocouple Input Field Calibration Procedure

Equipment Required:

• Type “J” Reference Compensator with reference junction at 32°F/0°C, or Type “J” Thermocouple Calibrator set at 32°F/0°C.

• Precision millivolt source, 0-50mV min. range, 0.01mV resolution.

Set Up:

1. Connect 100-240VÅ (ac) to Terminal 7 and Terminal 8.

2. Connect the millivolt source to Terminal 1 negative and Terminal 2 positive.

3. Apply power to the unit and allow it to warm up for 15 minutes.

Move to the Calibration Menu:

1. Press . and , simultaneously for 3 seconds.

2. Press . or , until [CnFG] is displayed.

Press and hold ß – press . or , to select [`YES], then release ß.

3. Press . or , until [`TAG] is displayed.

Press and hold ß. Press . or ,8 times (display shall be blank).

Calibration: (Thermocouple)

1. Press and hold ß, ., and , simultaneously for 3 seconds until [TR50] is displayed.

2. Set the mV source to 50.00mVÎ (dc). Allow 10 seconds for sources to stabilize. Press and hold ß. Press . or

, until [`YES] appears. Release ß.

3. Press , - [Tc00] shall be displayed.

4. Set the mV source to 0.00 mVÎ (dc). Allow 10 seconds for sources to stabilize. Press and hold ß. Press . or

, until [`YES] appears. Release ß.

5. Press ,. [``Tc] shall be displayed.

6. Set the MV source to 0.00 mV (if using a temperature compensator). Set calibrator to 32°F/0°C.

Allow 10 seconds for sources to stabilize. Press and hold ß. Press . or , until [`YES] is displayed. Release ß.

Calibration: (RTD) Equipment Required:

• Precision Resistance Box with 0.01Ω Resolution.

1. Remove thermocouple wires from Terminal 1 and Terminal 2.

2. Connect S2 to terminal 1. Connect S1 to Terminal 2.

3. Press ,. [R`15] shall be displayed.

4. Set the Decade box to 15.00Ω (allow 10 seconds for sources to stabilize). Press and hold ß. Press . or ,

until [`YES] appears. Release ß.

5. Press , - [R380] shall be displayed.

6. Set the decade box to 380.00Ω (allow 10 seconds for sources to stabilize). Press and hold ß. Press . or

, until [`YES] appears. Release ß.

7. Press and hold . and , for 3 seconds to Exit calibration menu.

Page 38

38 Watlow Series 935B User’s Manual

Errors and Troubleshooting

Key Error Information

Set up an input failure operation mode at the [FAIL] prompt in the [CnFG] menu; choose bumpless transfer [bPLS] for smooth output action transition to percent power control, or select a percent power output value.

[FAIL} [bPLS]

Bumpless Transfer

when errors occur, the control output will continue at a percent output learned while stable. Default = [bPLS].

[-100] [`100]

Percent Power

(-100% to +100% , depending on heat/cool output configuration). The control will assume a specific output power when input errors occur.

• All except one of the possible displayed error messages are input related.

• If you see [`Er5], cycle power to the controller. If the error persists, call the factory.

• Be aware of the difference between U.S and European thermocouple color/colour codes.

• Reversed polarity input leads is one of the most common errors.

• Incorrect software input choice at the Configuration Menu [CnFG] input [``In] prompt is another

common error.

When calling the factory for help, please have:

1. The model number of the control.

2. A photocopy of pages 51-58 with the settings from your control, if possible.

3. Specifications of devices directly interfaced with the control.

Configuration Menu

[``In]

Input Type

[`C_F]

Celsius/Fahrenheit

[``rL]

Input Range Low

[``rh]

Input Range High

[`Ot1]

Output 1 Function

[`Ot2]

Output 2 Function

[dISP]

Display Default

[ALtY]

Alarm Type

[AhYS}

Alarm Hysteresis

[`LAt]

Alarm Latch

[`SIL]

Alarm Silencing

[FAIL}

✓

Failure Mode

[tIM]

Timer Function

[Strt]

Start Timer

[`rdY]

Timer Ready Band

[``St]

Signal Time

[SLOC]

Set Point Lockout

[`tAG]

Lockout Tag

Page 39

Watlow Series 935B User’s Manual 39

Table 13 - Possible Displayed Error Codes and Actions

To Troubleshoot Sensor

• Remove sensor wires from Terminals 1 and 2.

• For a thermocouple sensor Series 935B, place a jumper wire on Terminals 1 and 2. Control should display the ambient

temperature at the back of the control.

• For an RTD sensor Series 935B, place a 110 +/- 10Ω resistor on Terminals 1 and 2. The control should read 100Ω = 32°F, 110 Ω = 77°F, 120Ω = 127°F.

• An RTD sensor Series 935B can be configured in software as if it were a thermocouple unit, and then tested as above.

• You can restore factory calibration [`rST], see p. 36-37.

Table 14 - Troubleshoot Control Outputs

When indications such as significant differences between set point and actual temperatures point to no output action, check output configurations as described on p. 23. Check wiring, p. 44.

Measure

Output Terminals Load-on State Load-off State

“C” Output 1 3 & 4 LED 1 on LED 1 off

3.0 to 7.0VÎ (dc) 0.0VÎ (dc)

“C” Output 2 5 & 6 LED 2 on LED 2 off

3.0 to 7.0VÎ (dc) 0.0VÎ (dc)

Control is inoperable. Check for line voltage at

terminals 7 and 8.

[````

Electrical noise. Cycle power to system. See if error clears.

Check system for electrical interference.

[`Er5]

Open Thermocouple, bad Check the sensor, A-D

connection, or broken wire. replace as necessary.

[`Er4]

Sensor type Go to In prompt, Sensor mismatch. check selection (see p. 22). over range

[`Er3]

Sensor type Go to In prompt, check selection (see p. 22), Sensor mismatch or open RTD. or check RTD, replace as necessary. under range

[`Er2]

Reversed thermocouple Change the sensor A-D connection + to –. leads on Terminals 1 and 2. under flow

[`Er1]

Display Probable Cause Recommended Action

Page 40

40 Watlow Series 935B User’s Manual

0.874"

(22.2mm)

+0.012",

-0.000"

(+0.3mm,

-0.0mm)

0.500"

(12.7mm)

0.500"

(12.7mm)

2.272"

(57.7mm)

1.374"

(34.9mm)

1.772" (45.0mm)

+0.024", -0.000"

(+0.6mm, -0.0mm)

Panel Thickness

0.060" to 0.38" (1.5 mm to 9.7 mm)

Layout for

four 1/32 DIN knockouts

with punch and die

Mounting

Figure 9- Panel Cut-out Dimensions

Figure 10- Mounting Layout for Knockouts

Punch and Die Supplier

Greenlee Textron, Inc., Phone: 1-800-435-0786.

Catalog Number: 50740180; Available: 4-6 weeks, Greenlee distributor.

Page 41

Watlow Series 935B User’s Manual 41

2.09" (53.1mm)

1.14" (29.0mm)

Panel Cutout

1.770" (44.96mm)

4.00" (101.6mm)

0.50" (12.7mm)

Maximum Overall Depth

4.50" (114.3mm)

Panel Thickness

0.060" to 0.38" (1.5mm to 9.7mm)

0.870" (22.10mm)

Dimensions

Figure 11- Series 935B Dimensions

Page 42

42 Watlow Series 935B User’s Manual

Installing the Series 935B

Installation Procedure

1. Make a panel cutout using the tear-out

mounting template, or the dimensions in Figure 9, p. 40.

2. Insert the 935B into the cutout. Check to see that the gasket is not twisted. Make sure the rounded side of the D-shaped external case gasket faces the panel surface, and the gasket is fully seated in its bezel channel. See Figure 12.

3. While pressing the bezel firmly against the panel, slide the mounting collar over the back of the control. The tabs on the collar must line up with the mounting ridges on the case for secure installation. See Figure 12 again.

4. Slide the collar firmly against the back of the panel, getting it as tight as possible. Make sure you cannot move the case within the cutout, if you can, you do not have a NEMA 4X/IP65 seal!

5. Make sure you have a tight seal. Use your thumb to lock the tabs into place while pressing the case from side to side. Don’t be afraid to apply enough pressure to install the control. The tabs on each side of the collar have teeth which latch into the ridges. See Figure 12. Each tooth is staggered at a different depth (from the front) so only one of the tabs on each side is ever locked into the ridges at any time.

6. Look at Figure 13; you see that the tabs on one side of the collar correspond with those on the opposite side. Be sure only the two corresponding tabs are locked in the ridges at the same time. If the matching tabs are not holding the case, no NEMA 4X/IP65 seal exists. Make a visual check, or use your finger nail to pull out on each tab. The space between the bezel and panel must be 0 to 0.019" (0.48 mm).

Collar Removal

To remove the mounting collar:

Slide a thin, wide tool (putty knife) under all three mounting tabs, top then bottom, while pushing forward on the back of the case.

Figure 12- Mounting, Case Top View and Collar Cross Section.

Figure 13- Case Rear View and NEMA 4X/IP65 Seal Example

NOTE: To guarantee a proper NEMA 4X / IP65 seal, make sure the gasket between the panel and the rim of the case is not twisted and is seated properly. Press firmly.

NOTE: Make sure the rounded side of the D-shaped external case gasket faces the panel surface, and the gasket is fully seated in its bezel channel. See Figure 12.

zel

External Gasket

NEMA 4X/IP65 Seal Example

0 to 0.019 space (0 to 0.483 mm)

Panel

Ridges

Tabs

Mounting Collar

Teeth

Page 43

Watlow Series 935B User’s Manual 43

Terminal Block Removal

Figure 14- Terminal Block Removal Procedure

2. Move your grip rearward slightly, then lift the terminal cover straight up.

1. Press in on sides of cover to release the terminal cover hooks.

Page 44

44 Watlow Series 935B User’s Manual

Wiring a 935B

Figure 15 - Wiring the Series 935B

Power Wiring

Remote Timer Start

(Closed switch = Starts Timer)

Front Panel Lock

(Closed switch = locked panel)

Input Wiring

CAUTION: Using grounded thermocouples with non-isolated output switching devices could introduce ground loops into the control system, and possibly damage the controller and product.

Output 1 Wiring Output 2 Wiring

NOTE: Both Output 1 and Output 2 are DIN-a-mite

compatible.

Internal Circuitry

Output 2; Switched DC; "C"

+5V

10Ω

–1+

C O M

– 3

R T S

+ 4

1 +

2 +

IN OUT

POWER

Output 1; Switched DC; "C"

+5V

10Ω

Internal Circuitry

–1+

C O M

–

R T S

+ 4

1 +

2 +

IN OUT

POWER

Thermocouple Input

–1+

C O

–

T S

+ 4

1 +

2 +

IN OUT

POWER

NOTE: Customer-supplied two-position switch.

NOTE: Customer-supplied N.O. momentary switch.

NOTE:

IN OUT

–1+

–

High Voltage

100 to 240V~

+ 4

POWER

IN OUT

–1+

C O

–

2-wire

3-wire

R T S

+ 4

POWER

–1+

C O M

Load 1

Load 2

Load 1

Page 45

Watlow Series 935B User’s Manual 45

System Wiring Examples

WARNING: All electrical wiring and fusing must conform to local and national electric codes. Contact local authorities for further information. Failure to comply with electric codes could result in injury or death, or damage to property.

Figure 16 - Series 935B System Wiring Examples

CAUTION: Using grounded thermocouples with non-isolated output switching devices could introduce ground loops into the control system, and possibly damage the grounder and product.

Figure 17 - Series 935B Ladder Diagram Wiring Example

120VÅ (ac)

Earth Ground

Series 935

935B-1CC0-000G

IN OUT

–1+

–

Coil

High Limit

Mechanical

Contactor

Fuse

POWER

L1 L2

DIN-a-mite

DAIC-1624-C000

High temp. light

Heater

Limit SensorProcess Sensor

92A3-1DJ1-0000

Limit Control

11 (-)

Optional

Normally

(+)

Momentary

Open

Switch

(+)

(-)

120VÅ (ac)

–)

(+)

12 13

IN OUT

–1+

92A3-1DJ1-0000

O M

–

DIN-a-mite

1 S +

+ 4

DAIC-1624-C000

L1 T1

Series 92

Limit Control

POWER

935B-1CC0-000G

Temperature

1089

1CR

Series 935

Controller

Heater

Hi Temp. Light

Branch

Circuit Fuse

1 CR-1

10 11 12

Page 46

46 Watlow Series 935B User’s Manual

Glossary

Alarm

A condition, generated by the controller, indicating that the process has exceeded or fallen below the set or limit point.

Alarm Hysteresis

A change in the process variable required to reenergize the alarm output.

Ambient Temperature

Temperature surrounding the components of a thermal system.

Auto-tune

Automatically sets PID values to fit a particular thermal system.

Bumpless Transfer

When transferring from auto to manual operation, the control output(s) will maintain the same output level.

Calibration

Adjusting an instrument to a known value. Configuration Menu -The second software sub

menu of the Series 935B Operations Menu; provides a location to set inputs, ranges, output types, alarm type, timer function, failure mode, and lockout types.

Control Mode

The method of control, i.e. ON/OFF, time proportioning, PI, PID or manual.

Cycle Time

Time required for a control to complete one ON through OFF cycle.

Dead Band

Adjusts the effective cool set point above the primary set point by the dead band value in degrees. In cool/heat applications, dead band prevents continuous cool output action by creating a buffer between heating and cooling output action.

Delay OFF

A Series 935B timer output (Output 2) choice that turns the output OFF at the end of the countdown timer time.

Delay ON

A Series 935B timer output (Output 2) choice that turns the output ON at the end of the countdown timer time.

Derivative

Limits the rate of change of the process to eliminate overshoot in slow or lagging loads (de=ra).

Deviation Alarm

An offset value which tracks the set point. Process changes beyond this value register an alarm condition.

DIN-a-mite

Watlow family of DIN rail-mounted SCR power controllers.

Droop

The difference between the set point and actual values once the system stabilizes.

Hysteresis

A change in the process variable required to reenergize the control or alarm output.

Idle Set Point

Desired control value before and after timing period.

Integral

Accumulates error to eliminate offset or droop (It=1/re).

Local Set Point

Primary set point, not remote.

ON/OFF

Control by turning the output full ON until set point is reached, and then turning OFF until the process error exceeds the hysteresis.

Operations Menu

Series 935B software menu; provides a location to start auto-tune, set alarm points, set countdown time, choose an idle or normal set point type, choose a local or remote set point input, and to go to the PID or Configuration Menus.

Overshoot

The amount a process variable exceeds set point before stabilizing.

Percent Power Control

Open loop control with output power set at a particular level.

PID

(Proportional, Integral, Derivative). A control mode: proportional action sets the system, integral reduces droop, derivative reduces overshoot and undershoot.

PID Menu

The first software sub menu of the Series 935B Operations Menu; provides a location to manually set values for proportional band, hysteresis, cycle time, integral, derivative, and calibration offset.

Process Alarm

A fixed value independent of set point. Process changes beyond this value register an alarm condition.

Process Error

The difference between the set point and the actual process.

Proportional

Output effort proportional to the error from set point. If the proportional band is 20° and the process is 10° below set point, the heat proportioned effort is 50%. The lower the Pb value, the higher the gain.

Proportional Band

A range in which a control’s proportioning function is active (See PID).

Range

The area between two limits in which a quantity or value is measured. Usually expressed in terms of lower and upper limits.

Ready Acknowledge

A Series 935B countdown timer start choice that pre-initiates the timer with a down key press, and then starts it with a SET press when the actual temperature is within the Ready Band.

Ready Band

Thermal area above and below primary set point in which the timer will count down.

Relay, Electromechanical

A power switching device that completes or interrupts a circuit by physically moving electrical contacts. Not recommended for PID control.

RTD

Resistive Temperature Detector. A sensor whose resistance increases with increasing temperature.

Remote Timer Start

Activation of the timer functions using an external remotely mounted switch connected to the 935B RTS input.

Set Point

The desired process value programmed into a control.

Signal

Any electrical transmittance that conveys information.

Signal OFF

A Series 935B timer output (Output 2) choice that toggles the output OFF, then ON at the end of the countdown timer cycle for a period equal to the signal time.

Signal ON

A Series 935B timer output (Output 2) choice that toggles the output ON, then OFF at the end of the countdown timer cycle for a period equal to the signal time.

Signal Time

Time duration the timer output will turn ON or OFF after a complete timing period.

SCR

Silicon controlled rectifier. A solid state device, or thyristor, with no moving parts, that is used in pairs to control AC voltages within one cycle. SCRs control voltage from a power source to the load by burst firing (also called zero-cross firing) or phase angle firing.

SSR

Solid State Relay. A solid state switching device that switches current ON and OFF. It has no moving parts.

Thermal System

A regulated environment consisting of a heat source, heat transfer medium, sensing device, a control instrument, and a redundant control device (limit).

Thermocouple

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 and lead wire connection to the sensing device (cold junction).

Undershoot

The amount a process variable falls below set point before stabilizing.

Page 47

Watlow Series 935B User’s Manual 47

Auto-tune [`Aut] . . . . . . . . . . . . . . 12, 34

Alarms

Alarm High [`AhI] . . . . . . . . . . 12, 26

Alarm Low [`ALO] . . . . . . . . . . 12, 26

Alarm Type [AltY] . . . . . . . . . . 26, 27

Clearing . . . . . . . . . . . . . . . . . . . 28, 29

Deviation [dEnc] , [dEno] . . . . 26, 27

Hysteresis [AhYS] . . . . . . . . . . 26, 27

Latch [`LAt] . . . . . . . . . . . . . . 26, 29

Learning . . . . . . . . . . . . . . . . . . . . . 26

Process [Prnc] , [Prno] . . . . . 26, 27

Setting . . . . . . . . . . . . . . . . . . . . 28, 29

Silencing [`SIL] . . . . . . . . . . . . 26, 29

Bumpless Transfer [bPLS] . . . . . . . . . .38

Calibration . . . . . . . . . . . . . . . . . . . 36, 37

Factory Restore [`rST] . . . . . . . . . 36

Calibration Offset [`CAL] . . . . . . . 15, 17

Celsius / Fahrenheit [`C_F] . . . . . 22, 23

Clearing Alarms . . . . . . . . . . . . . . . 28, 29

Configuration [CnFG] . . . . . . . . . . . 11, 18

Cycle Time . . . . . . . . . . . . . . . . . . . . . . 15

Heat [Ct`h] . . . . . . . . . . . . . . . . . . 15

Cool [Ct`c] . . . . . . . . . . . . . . . . . . 15

Dead Band [``db] . . . . . . . . . . . . . . . 15

Derivative [``dE] . . . . . . . . . . . . . 15, 17

Dimensions . . . . . . . . . . . . . . . . . . .40, 41

DIN-a-mite

compatibility . . . . . . . . 44, 48

Display Default [dISP] . . . . . . . . . 18, 22

Errors . . . . . . . . . . . . . . . . . . . . . . . 10, 39

Failure Mode [FAIL] . . . . . . . . . . . 19, 38

Front Panel Lock [`FPL] . . . . . . . . 22, 25

Glossary . . . . . . . . . . . . . . . . . . . . . . . . 46

Hours/Minutes [thM] . . . . . . . . . . 30-32

Hysteresis

Alarm [AhYS] . . . . . . . . . . . . . . 19, 26

Heat [hYSh] . . . . . . . . . . . . . . . . . . 15

Cool [hYSc] . . . . . . . . . . . . . . . . . . 15

Idle [IdLE] . . . . . . . . . . . . . . . . . . . . . . 12

Idle Set Point Track [trAc] . . . . . . . . . 12

Input Range Low [``rL] . . . . . . . . 22, 23

Input Range High [``rh] . . . . . . . 22, 23

Input Type [``In] . . . . . . . . . . . . . . . . 23

Integral [`It] . . . . . . . . . . . . . . . . . 15, 17

Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Latch [`LAt] . . . . . . . . . . . . . . 19, 26, 29

Lockout Functions . . . . . . . . . . . . . . . . 20

Front Panel [`FPL] . . . . . . . . . 20, 25

Security Tag [`tAG] . . . . . . . . . . . . 20

Set Point [SLOC] . . . . . . . . . . . . . . . 20

Minutes/Seconds [tMS] . . . . . . . 19, 30

Mounting . . . . . . . . . . . . . . . . . . . . . . . .40

Operations, Learning . . . . . . . . . . . . . . 12

Ordering Information . . . . . . . . . . . . . . 49

Output 1 Function [`Ot1] . . . . . 5, 22, 23

Output 2 Function [`Ot2] . . . . . 5, 22, 23

PID Menu, Learning . . . . . . . . . . . . . . . 14

PID Settings, Tweaking . . . . . . . . . 15, 35

Proportional Band

Heat [Pb`h] . . . . . . . . . . . . . . . . . . 15

Cool [Pb`c] . . . . . . . . . . . . . . . . . . 15

Remote Timer Start [`rts] . . . . . . 22, 24

Set Point

Change . . . . . . . . . . . . . . . . . . . . . . . 9

Lock [SLOC] . . . . . . . . . . . . . . . . . . 20

Range High [``rh] . . . . . . . . . . . . 22

Range Low [``rL] . . . . . . . . . . . . . 22

Silencing Alarms . . . . . . . . . . . . . . . . . . 29

Software Maps

Easy . . . . . . . . . . . . . . . . . . . . . . . . . 11

Advanced . . . . . . . . . . . . . . . . . . 51-58

Specifications . . . . . . . . . . . . . . . . . . . . 48

Terminal Block Removal . . . . . . . . . . . 43

Timer

Countdown [tMr] . . . . . . . 12, 30-33

Delay off [dLoF] . . . . . . . . . 19, 30, 31

Delay on [dLon] . . . . . . . . . 19, 30, 31

Function [tIM] . . . . . . . . . 19, 30, 31

Hours/Minutes [thM] . . . . 19, 30, 31

Idle [IdLE] . . . . . . . . . . . . . 19, 30, 31

Minutes/Seconds [tMS] . . 19, 30, 31

Ready Band [`rdY] . . . . . . 19, 30, 31

Signal off [SGof] . . . . . . . . 19, 30, 31

Signal on [SGon] . . . . . . . . 19, 30, 31

Signal Time [``St] . . . . . . 19, 30, 31

Start Timer [Strt] . . . . . . . 19, 30, 31

Immediate [IMd] . . . . . 19, 30, 31

Ready Band [`rDY] . . . . 19, 30, 31

Ready BandAcknowledge [rdYA] . . . 19, 30, 31

Tuning

Auto-tuning . . . . . . . . . . . . . . . . 12, 34

Manual tuning . . . . . . . . . . . . . . 34, 35

Troubleshooting . . . . . . . . . . . . . . . 38, 39

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Wiring Examples . . . . . . . . . . . . . . . . . 45

Index

Page 48

48 Watlow Series 935B User’s Manual

Specifications

• Height

• Length

• Width

Specifications—(1951)

Control Mode

• Auto-tune PID.

• PID, PD, PI, on/off.

• Countdown timer; hours:minutes, minutes:seconds.

• Timer output modes; Delay-off, Delay-on, Signal-off, Signalon.

Agency Approvals

• UL/C-UL 508, File #E102269.

• NEMA 4X

(IP65) rated front panel.

• 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.

Operator Interface

• Single, seven-segment digital display, factory selectable red or green.

• Outputs/operation annunciators, three discrete LEDs.

• Three tactile feedback momentary switches.

• Front panel lock dry contact closure disables front panel operation.

Accuracy

• ±0.25% of span +/- 1 LSD, or

• Types S and T thermocouple @ < 200°C, ±0.32% of span +/- 1 LSD, typical.

Ambient Rejection

• < 0.15°C/°C rise in ambient, or

• Types S and T thermocouple, @ < 0.47°C/°C rise in ambient typical.

Sensors/Inputs

• Sensor input sampling rate: 10 samples/second (10Hz).

• Type E, J, K, N, S and T thermocouple, grounded or ungrounded junction.

• RTD, two-wire 100Ω base (DIN) resistance.

• Dry contact closure on RTS input enables remote timer start function or front panel lock, depending on menu selection.

Input Range

Specified temperature ranges represent the controller's operational span.

Thermocouple

Type E -328 to 1470°F

(-200 to 799°C)

Type J 32 to 1382°F

(0 to 750°C)

Type K -328 to 2282°F

(-200 to 1250°C)

Type N 32 to 2282°F

(0 to 1250°C)

Type S 32 to 2642°F

(0 to 1450°C)

Type T -328 to 662°F

(-200 to 350°C)

RTD Resolution (DIN)

1° -328 to 1292°F

(-200 to 700°C)

0.1° -199.9 to 999.9°F (-128.8 to 537.7°C)

Control Output

• Output update rate: 1/second (1Hz).

1 Output

• Switched dc logic signal, 6VÎ (dc) @ 60mA nominal, short

circuit protected, non-isolated (Watlow DIN-a-mite® power controller compatible).

2 Output

• Switched dc logic signal, 6VÎ (dc) @ 60mA nominal, short

circuit protected, non-isolated (Watlow DIN-a-mite® power controller compatible).

Output Cycle Time

• Switched dc; 5.0 second default, 0.1 second minimum.

Line Voltage/Power

• 100-240V~ (ac) +10%, -15%; (85-264V~ [ac]) 50/60Hz, ±5%.

• Fused internally (factory replaceable only) time-lag type, 2A,

250V.

• Power consumption 6VA maximum.

• Data retention upon power failure via non-volatile memory.

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).

Terminals

• Touch-safe set screw type, accepts 22 to 12-gauge wire.

Controller Weight

• 4.0 oz (113.4 g).

Shipping Weight

• 7.3 oz (208 g).

These specifications are subject to change without prior notice.

Page 49

Ordering Information—(1952) 9 3 5 B - 1 C C 0 - _ _ 0 _

Single thermocouple or RTD (DIN) input, dual output, single display temperature control with time function

Output 1/Remote Input

C = Switched dc, logic signal, non-isolated

Output 2

C = Switched dc, logic signal, non-isolated

Power Supply

0 = 100 to 240VÅ (ac)

Custom Options

00 = None AA-ZZ = Consult factory for options

Display

R=Red Displays G=Green Displays

Table 15 - Input Range Information

0.1° RTD: -99.9 to 999.9°F or -99.9 to 700.0°C

To effect NEMA 4X (IP65) rating requires a minimum mounting panel thickness of 0.06 inch (1.5mm) and a surface finish not rougher than 0.000032 inch (0.000812 mm).

Watlow Series 935B User’s Manual 49

Ordering a 935B

Page 50

50 Watlow Series 935B User’s Manual

CE Compliant Product

Declaration of Conformity

Series 935

WATLOW CONTROLS

1241 Bundy Boulevard Winona, Minnesota 55987 USA

Declares that the following product:

English

Designation: Series 935 Model Number(s): 935A or B - 1C (C D or K) (0 or 1) - (Any four numbers

or letters)

Classification: Control, Installation Category II, Pollution Degree II Rated Voltage: 100 to 240V~ or 24 to 28V‡ Rated Frequency: 50/60 Hz

Rated Power Consumption: 6VA 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

environment

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

environment

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

characteristics of industrial, scientific and medical radio-

frequency equipment (Group 1, Class A) EN 61000-3-2: 1995 Limits for harmonic current emissions EN 61000-3-3: 1995 Limitations of voltage fluctuations and flicker

73/23/EEC Low-Voltage Directive

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

measurement, control, and laboratory use, Part 1:

General requirements

Déclare que les produits suivants :

Français

Désignation : Série 935 Numéro de modèle : 935A or B - 1C (C D ou K) (0 ou 1) - (N’importe

lesquels des quatre chiffres ou lettres)

Classification : Réglage, installation de catégorie II, taux de pollution II Tension nominale : 100 à 240 V ~ ou 24 à 28 V ‡ Fréquence nominale : 50/60 Hz Consommation

d’énergie nominale: 6 volt-ampères maximum Sont conformes aux principales normes des directives de l’Union Européenne au regard de la (des) section(s) pertinente(s) des normes standards et documents apparentés présentés :

89/336/EEC Directive de compatibilité électromagnétique

EN 50082-2 : 1995 Norme générique immunité 2e partie : Environnement

industriel

EN 61000-4-2 : 1995 Décharge électrostatique EN 61000-4-4 : 1995 Transitoires rapides électriques EN 61000-4-3: 1996 Immunité rayonnée EN 61000-4-6 : 1996 Immunité conduite ENV 50204 : 1995 Téléphone cellulaire

EN 50081-2 : 1994 Norme générique émission - 2e partie

EN 55011 : 1991 Limites et méthodes de mesure des caractéristiques des

perturbations radioélectriques des appareils industriels, scientifiques et médicaux (I.S.M.) à fréquence radioélectrique

(Groupe 1, Catégorie A) 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 de basse tension

EN 61010-1 : 1993 Normes de sécurité des équipments électriques de

mesure, de contrôle et à usage laboratoire, section 1:

normes générales

Declara que el producto siguiente:

Español

Designación: Serie 935 Números de modelos: 935A or B - 1C (C D o K) (0 o 1) - (Cualquier

combinación de cuatro números y letras)

Clasificación: Control, Categoría de instalación II, Grado de

Contaminación Ambiental II

Tensión nominal: 100 a 240 V~ o 24 a 28V ‡ Frecuencia nominal: 50/60 Hz Consumo nominal de energía: 6 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:

89/336/EEC - Directiva de Compatibilidad Electromagnética

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

Ambiente industrial

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

industrial

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

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

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

73/23/EEC Directiva de baja tensión

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

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

Requerimientos generales

Erklärt, daß das folgende Produkt:

Deutsch

Beschreibung: Serien 935 Modellnummern: 935A or B - 1C (C D oder K) (0 oder 1) - (4 beliegibe

Buchstaben)

Klassifikation: Regelsystem, Installationskategorie II, Emissionsgrad

Nennspannung: 100 bis 240 V~ oder 24 bis 28 V‡ Nennfrequenz: 50/60 Hz

Stromverbrauch: Max. 6 VA Erfüllt die wichtigsten Normen der folgenden Anweisung der Europäischen Gemeinschaft unter Verwendung des wichtigen Abschnitts der normalisierten Spezifikationen und der untenstehenden einschlägigen Dokumente:

89/336/EEC Elektromagnetische Übereinstimmungsanweisung

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

Umwelt

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

Umgebung

EN 55011: 1991 Beschränkungen und Methoden der Messung von

Funkstörungsmerkmalen industrieller, wissenschaftlicher und

medizinischer Hochfrequenzgeräte (Gruppe 1, Klasse A) 61000-3-2: 1995 Grenzen der Oberwellenstromemissionen EN 61000-3-3: 1995 Grenzen der Spannungsschwankungen und Flimmern

72/23/EEC Niederspannungsrichtlinie zu entsprechen

EN 61010-1: 1993 Grenzwerte und Methoden zur Messung von

Funkstörungseigenschafter von industriellen,

wissenschaftlichen und medizinischen

Hochfrequenzgeräten (Klasse A)

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

General Manager May 14, 1996 Title of Authorized Representative Date of Issue

________________________________________ Signature of Authorized Representative

(1226)

Page 51

Watlow Series 935A User ’s Manual 51

935B Software Map

Operations Menu

Prompt Range Default Hidden if * Your Settings

*NOTE:

All prompts, except

[``SP] and [`tAG],

are hidden if [`Ot1] =

[`FPL].

[`tA9] = [`O``];

or if

[`Ot2] ≠ [thM] or [tMs]

[trAc][trAc] [``rL]

[``rh]

Choose an idle Set Point. Trac is an Idle Set Point equal to the Primary Set Point; or select a value between Input Type Range Low and Input Type Range High.

[idLE]

Idle Set Point Type

[`tA9] = [`O``];

or if

[`Ot2] ≠ [thM] or [tMs]

[0000]

Select a countdown time value, adjustable between 00:00 and 99:59 hrs:mins or min:sec.

[tMr]

Countdown Timer

[`tA9] = [`O``];

or if

[`Ot1] and [`Ot2] ≠ [ALM]

Type J Range High[`RL0]

Select a value, adjustable between Alarm Low and Range High.

[`Ah1]

Alarm High

[`tA9] = [`O``];

or if

[`Ot1] and [`Ot2] ≠ [ALM]

Type J Range Low[`Ah1]

Select a value, adjustable between Range Low and Alarm High.

[`ALO]

Alarm Low

[`tA9] = [```A]no[``no] [`YES]

Choose YES to Autotune the 935A.

[`Aut]

Auto-tune

Appears always

75°F or 23°C[``rL] [``rh]

Select a value, adjustable between Input Type Range Low and Input Type Range High.

[``SP]

Primary Set Point

Page 52

52 Watlow Series 935A User’s Manual

Operations Menu

Prompt Range Default Hidden if * Your Settings

[`tA9] = [P```];

or if

[Pb`h] ≠ 0

3°F or 2°C

[```1] [`999]

[```1] [`555]

[``)1] [99(0]

[``)1] [55%0]

Select a value in whole degrees (1°F to 999°F or 1°C to 555°C) or in tenths of degrees (0.1°F to 999.0°F or 0.1°C to

555.0°C).

[hYSh]

Hysteresis Heat

[`tA9] = [P```];

or if

[`Ot1] and/or [`Ot2]

≠ [hEAt]

25°F or 17°C

[```0] [`999]

[```0] [`555]

[``)0] [99(0]

[``)0] [55%0]

Select a value in whole degrees (0°F to 999°F or 0°C to 555°C) or in tenths of degrees (0.0°F to 999.0°F or 0.0°C to

555.0°C).

[`Pb`h]

Proportional Band Heat

The front panel is locked out.

no[``no] [`YES]

Choose YES to move to the Configuration Menu.

[CnFg]

Configuration Menu

[`tA9] = [P```]no[``no] [`YES]

Choose YES to move to the PID Menu.

[`Pid]

PID Menu

Page 53

[`tA9] = [P```];

or if

[Pb`c] ≠ 0

3°F or 2°C[```1] [`999]

[```1] [`555]

[``)1] [99(0]

[``)1] [55%0]

Select a value in whole degrees (1°F to 999°F or 1°C to 555°C) or in tenths of degrees (0.1°F to 999.0°F or 0.1°C to

555.0°C).

[hYSc]

Hysteresis Cool

[`tA9] = [P```];

or if

[`Ot1] ≠ [cool]

and/or

[`Ot2] ≠ [cool]

25°F or 17°C

[```0] [`999]

[```0] [`555]

[``)0] [99(0]

[``)0] [55%0]

Select a value in whole degrees (0°F to 999°F or 0°C to 555°C) or in tenths of degrees (0.0°F to 999.0°F or 0.0°C to

555.0°C).

[Pb`c]

Proportional Band Cool

[`tA9] = [P```];

or if

[`Ot1] = [cool] and

[`Ot2] ≠ [hEAt];

or if

[`Ot1] = [hEAt] and

[`Ot2] ≠ [cool]

0°F or 0°C[```0] [`999]

[```0] [`555]

[``)0] [99(0]

[``)0] [55%0]

Select a value in whole degrees (0°F to 999°F or 0°C to 555°C) or in tenths of degrees (0.0°F to 999.0°F or 0.0°C to

555.0°C).

[``db]

Dead Band

[`tA9] = [P```];

or if

[Pb`h] = 0

1.0 second

[``)1] [`6)0]

[``%0] [`6)0]

Select a value between

0.1 and 60.0 seconds (Solid-State Relay or Switched DC) or 5.0 and

60.0 seconds (Electromechanical Relay).

[Ct`h]

Cycle Time Heat

Watlow Series 935A User ’s Manual 53

PID Menu

Prompt Range Default Hidden if * Your Settings

Page 54

[`tA9] = [P```]

0°F or 0°C

[-999] [9999]

[-9(9] [99(9]

Select a value, adjustable between

-999° and 9999°F or C or -99.9° and 999.9°F or C to eliminate a difference between the displayed temperature and the actual temperature.

[`CAL]

Calibration Offset

[`tA9] = [P```];

or if

[Pb`h] = 0;

or if

[Pb`h] is hidden; and if [Pb`c] = 0;

or if

[Pb`c] is hidden

0 minutes

[`)00] [`(99]

Select a value, adjustable between 0.00 and 9.99 minutes.

[``dE]

Derivative Function

[`tA9] = [P```];

or if

[Pb`h] = 0;

or if

[Pb`h] is hidden; and if [Pb`c] = 0;

or if

[Pb`c] is hidden

5.00 minutes/repeat

[``)0] [9(99]

Select a value, adjustable between 0.0 and 99.99 minutes/repeat.

[``It]

Integral Function

[`tA9] = [P```];

or if

[Pb`c] = 0

or if

[Pb`c] is hidden

5.0 seconds

[``)1] [`6)0]

[``%0] [`6)0]

Select a value between

0.1 and 60.0 seconds (Solid-State Relay or Switched DC) or 5.0 and

60.0 seconds (Electromechanical Relay).

[Ct`c]

Cycle Time Cool

54 Watlow Series 935A User’s Manual

PID Menu

Prompt Range Default Hidden if * Your Settings

Page 55

Watlow Series 935A User ’s Manual 55

Configuration Menu

Prompt Range Default Hidden if * Your Settings

[`tA9] = [``C`]

heat

[hEAt] [COOL]

[ALM] [`rSP]

[`FPL] [nonE]

Choose Heat, Cool, Alarm, Remote Set Point, Front Panel Lock or No output action.

[`Ot1]

Output 1 Function

[`tA9] = [``C`]Type J range high value[``rL] [``In]

Select a value between Input Type Range High and Input Range Low.

[``rh]

Range High

[`tA9] = [``C`]Type J range low value[``In] [``rh]

Select a value between Input Type Range Low and Input Range High.

[``rL]

Range Low

[`tA9] = [``C`]F[``°F] [``°C]

Choose to indicate temperature in °Fahrenheit or °Celsius.

[`C_F]

Celsius/Fahrenheit

[`tA9] = [``C`]

[```J] J t/c

[```H] K t/c

[```t] T t/c

[```N] N t/c

[```E] E t/c

[```S] S t/c

[`rtd] 1.0°RTD

[`rtd] 0.1°RTD

[``In]

Input Type

Page 56

[`tA9] = [``C`];

or if

[`Ot1] and/or

[`Ot2] ≠ [ALM]

3°F or 2°C

[```1] [`999]

[```1] [`555]

[``)1] [99(0]

[``)1] [55%0]

Select a value in whole degrees (1°F to 999°F or 1°C to 555°C) or in tenths of degrees (0.1°F to 999.0°F or 0.1°C to

555.0°C).

[AhYS]

Alarm Hysteresis

[`tA9] = [``C`];

or if

[`Ot1] and/or

[`Ot2] ≠ [ALM]

Prnc

[Prnc] [Prno]

[dEnc] [dEno]

Choose an alarm type: Process normally closed, Process normally open, Deviation normally closed or Deviation normally open.

[ALtY]

Alarm Type

[`tA9] = [``C`]

[``Ac] [AcSP]

[Act1] [t1Ac]

[t1SP]

Choose the primary (last 2 characters) and secondary (first 2 characters) Default displays. Press ß to toggle to the secondary display for 15 seconds.

[dISP]

Display Default

[`tA9] = [`0``]Off[`off] [`fpl]]

[tMr]

Choose Off, Front Panel Lock, or Timer (Hrs:Min)

[`rt5]

Remote Timer Start

[`tA9] = [``C`]none[hEAt] [COOL]

[ALM] [`thM]

[tMS] [nonE]

Choose Heat, Cool, Alarm, Timer (Hrs:Min), Timer (Min:Sec) or No output action.

[`Ot2]

Output 2 Function

56 Watlow Series 935A User’s Manual

Configuration Menu

Prompt Range Default Hidden if * Your Settings

Page 57

Watlow Series 935A User ’s Manual 57

Configuration Menu

Prompt Range Default Hidden if * Your Settings

[`tA9] = [``C`];

or if

[`Ot2] ≠ [thM] or [tMS]

0°F or 0°C

[```0] [`999]

[```0] [`555]

[``)0] [99(0]

[``)0] [55%0]

If [Strt] = [rdYA] or [`rdy], then select a

value in whole degrees (0°F to 999°F or 0°C to 555°C) or in tenths of degrees (0.0°F to

999.0°F or 0.0°C to

555.0°C).

[`rdY]

Timer Ready Band

[`tA9] = [``C`];

or if

[`Ot2] ≠ [thM] or [tMS]

Immediate

[IMd] [`rdY]

[rdYA] [PWr]

Choose Immediate, Ready Band, Ready Band Acknowledge, or Power.

[Strt]

Start Timer Function

[`tA9] = [``C`];

or if

[`Ot2] ≠ [thM] or [tMS]

Delay OFF[dLon] [dLoF]

[SGon] [SGoF]

Choose Delay ON, Delay OFF, Signal ON, or Signal OFF.

[tIM]

Timer Output Function

[`tA9] = [``C`];

or if

[`Ot1] and [`Ot2] ≠ [hEAt] or [cooL]

Bumpless[bPLS] [-100]

[`100]

Choose Bumpless Transfer or Percent Power.

[FAIL]

Input Failure Mode

[`tA9] = [``C`];

or if

[`Ot1] and/or

[`Ot2] ≠ [ALM]

no[``no] [`YES]

Choose YES for a Silenced Alarm on startup or silencing during operation.

[`SIL]

Alarm Silencing

[`tA9] = [``C`];

or if

[`Ot1] and/or

[`Ot2] ≠ [ALM]

no[``no] [`YES]

Choose YES for a Latching Alarm.

[`LAt]

Alarm Latch

Page 58

58 Watlow Series 935A User’s Manual

Configuration Menu

Prompt Range Default Hidden if * Your Settings

Always appears

[PCOA] [`COA]

[PCO`] [`CO`]

[PC`A] [`C`A]

[PC``] [`C``]

[P`OA] [``OA]

[P`O`] [``O`]

[P`A`] [```A]

[P```] [````]

Choose the menus/functions that will not be displayed, and therefore cannot be changed.

P = PID Menu

C = Configuration Menu (except tag)

O = Operations Menu

(except [CnFg])

A = Auto-tune

[`tA9]

Lockout Tag

[`tA9] = [``C`]no[``no] [`YES]

Choose YES to Lock the Primary Set Point.

[SLOC]

Set Point Lockout

[`tA9] = [``C`];

or if

[tIM] ≠ [SGon] or [SGof]

00:01[```1] [9(ƒ9]

If [t1M] = [SGon] or [SGof], then select a value between 00:01 and 99:59 min:sec.

[``St]

Signal Time

Page 59

About Watlow Winona

Watlow Winona is a U.S. division of Watlow Electric Manufacturing Company, St. Louis, Missouri, a manufacturer of industrial electric heating products since 1922. Watlow products include electric heaters, sensors, controllers 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 and end users depend upon Watlow Winona to provide compatibly engineered controls that they can incorporate into their products with confidence. Watlow Winona resides in a 100,000-square-foot marketing, engineering and manufacturing facility in Winona, Minnesota.

Warranty

The Watlow Series 935 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.

Returns

• Call or fax your distributor or the nearest Watlow sales office for best information about returns. (See outside back cover.)

• To return directly to Watlow Winona in the U.S., first call or fax Customer Service for a Return Material Authorization (RMA) number (telephone: +1 (507) 454-5300; fax: +1 (507) 452-4507).

• Put the RMA number on the shipping label, along with on a written description of the problem.

• A restocking charge of 20% of the net price is charged for all standard units returned to stock.

Page 60

How to Reach Us

Quality and Mission Statement:

To position Watlow Winona as the world’s best supplier of superior thermal solutions, by exceeding the expectations of our customers, shareholders, and employees.

Europe:

Watlow Electric GmbH Lauchwasenstr. 1, Postfach 1165, Kronau 76709 Germany Telephone: +49 (0) 7253 9400 Fax: +49 (0) 7253 9400 99

Watlow France S.A.R.L. Immeuble Somag,16 Rue Ampère, Cergy Pontoise Cedex 95307 France Telephone: +33 (1) 3073 2425 Fax: +33 (1) 3073 2875

Watlow Italy S.r.l. Via Meucci 14 20094 Corsico, Milano Italy Telephone: +39 (02) 458 8841 Fax: +39 (02) 458 69954

Watlow Limited Robey Close, Linby Industrial Estate, Linby, Nottingham NG15 8AA England Telephone: +44 (0) 115 9640777 Fax: +44 (0) 115 9640071

Asia/Pacific:

Watlow Australia Pty., Ltd. 3 Belmont Place, Gladstone Park, Tullamarine, Victoria 3043 Australia Telephone: +61 (3) 9335 6449 Fax: +61 (3) 9330 3566

Watlow China, Inc. 179, Zhong Shan Hong Qiao Cointek Bldg, Fl. 4, Unit P Shanghai 200051 China Telephone: +86 21-6229-8917 Fax: +86 21-6228-4654

Watlow Japan Ltd. K.K. Azabu Embassy Heights 106, 1-11-12 Akasaka, Minato-ku, Tokyo 107-0052 Japan Telephone: +61 (3) 9335 6449 Fax: +61 (3) 9330 3566

Watlow Korea 3rd Fl. DuJin Bldg. 158 Samsun-dong, Kangnam-ku Seoul, 135-090 Korea Telephone: +82 (02) 563 5777 Fax: +82 (02) 563 5779

Watlow Singapore Pte. Ltd. Blk, 55, Ayer Rajah Crescent, #3-23, Ayer Rajah Industrial Estate, Singapore 139949 Telephone: +65 777 5488 Fax: +65 778 0323

Watlow Electric Taiwan 10F-1 No. 189, Chi-Shen 2nd Road, Kaohsiung, Taiwan Telephone: +886 (0) 7 261 8397 Fax: +886 (0) 7 261 8420

Watlow-Penang 38-B Jalan Tun Dr. Awang Bayan Lepas Penang, Malaysia 11900 Telephone: +60 (4) 641-5977 Fax: +60 (4) 641-5979

Latin America:

Watlow de México Av. Fundición #5, Col. Parques Industriales, Querétaro, Qro. México CP-76130 Telephone: +52 (42) 17 6235 Fax: +52 (42) 17 6403

Your Authorized Watlow Distributor:

For other information:

Watlow FAX REPLY: (908) 885-6344 (outside the U.S.); or (800) 367-0430 (inside the U.S.)

TOTAL

CUSTOMER

SATISFACTION

3 Year Warranty

Watlow 935B User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Information in this Manual

Technical Assistance

Your Comments

Where to find it…

Introduction

Press & read or press & change

Begin Controlling

Change Set Point

Respond to a simple error

Learn Easy Software Map

Learn the Operations Menu

Learn the PID Menu

Setting PID Menu Values

Learn the PID Menu - Details

Set-Up General

Learn the Configuration Menu

Using Lockout Functions

Setting Inputs and Outputs

Configuration Menu

Using Remote Timer Start Input

Using Front Panel Lockout

Learning Alarms

Setting and Clearing Alarms

Learn the Countdown Timer

Setting the Countdown Timer

Timer Example Application

Auto-tuning

Tweaking PID Settings

Calibrating the 935B

Errors and Troubleshooting

Percent Power

To Troubleshoot Sensor

Mounting

Dimensions

Installing the Series 935B

Terminal Block Removal

Wiring a 935B

System Wiring Examples

Glossary

Index

Specifications

Ordering a 935B

CE Compliant Product

Operations Menu

PID Menu

Configuration Menu

About Watlow Winona

Warranty

Returns

How to Reach Us