Despatch 1500 User Manual

Instruction Manual for the

Despatch/Watlow 1500 Control

P/N 260786

Rev. 8/96

E-87

U.S. $45.00

Notice

Users of this equipment must comply with operating procedures and training of
operation personnel as required by the Occupational Safety and Health Act (OSHA)
of 1970, Section 6 and relevant safety standards, as well as other safety rules and
regulations of state and local governments. Refer to the relevant safety standards
in OSHA and National Fire Protection Association (NFPA), section 86 of 1990.

Caution

Setup and maintenance of the equipment should be performed by qualified
personnel who are experienced in handling all facets of this type of system.
Improper setup and operation of this equipment could cause an explosion that may
result in equipment damage, personal injury or possible death.

Dear Customer,
Thank you for choosing Despatch Industries. We appreciate the

opportunity to work with you and to meet your heat processing
needs. We believe that you have selected the finest equipment
available in the heat processing industry.

At Despatch, our service does not end after the purchase and
delivery of our equipment. For this reason we have created the
Service Products Division within Despatch. The Service Products
Division features our Response Center for customer service. The
Response Center will direct and track your service call to ensure
satisfaction.

Whenever you need service or replacement parts, contact the
Response Center at 1-800-473-7373: FAX [phone].

Thank you for choosing Despatch.
Sincerely,
Despatch Industries

Copyright © October 24, 2001 by Despatch Industries

PREFACE

This manual is your guide to the Watlow 1500 control. It is
organized to give you the information you need quickly and
easily.

The INTRODUCTION section provides an overview of the
control.

The THEORY OF OPERATION section details the function
and operation of the control.

The INSTRUCTIONS section provides directions on
unpacking, installing, operating and maintaining the control.

The APPENDIX section contains Special Instructions for
operating the control instrument and a Troubleshooting
Table.

An efficient way to learn about the control would be to
read the manual while working with the control. This will
give you practical hands-on experience with information in
the manual and the control.

While reading this manual, if a term or section of
information is not fully understood, look up that item in the
appropriate section to familiarize yourself with that item.
Then go back and reread that section again. Information
skipped, not understood or misunderstood could create the
possibility of operating the equipment in an unsafe manner.
This can cause damage to the oven or personnel, or reduce
the efficiency of the equipment.

NOTE:
Read the entire
INTRODUCTION and
THEORY OF OPERATION
before operating the control.

WARNING:
Failure to head warnings in
this instruction manual and
on the oven could result in
death, personal injury or
property damage.

Despatch/Watlow 1500 Control Instruction Manual Page i

Page ii Despatch/Watlow 1500 Control Instruction Manual

Table of Contents

PREFACE ............................................................i

Table of Contents .................................................iii

List of Figures ....................................................iv

List of Tables .....................................................iv

INTRODUCTION ..................................................... 1

INSTRUCTIONS ...................................................... 3

Operating ........................................................ 3

Watlow 1500 Control ............................................... 4

Manual Set Point Controller ....................................... 6

Guarded Access Programming ..................................... 8

Setting the Clock ............................................. 9

GA0001 and 0002 PID Tuning ................................. 10

GA0000 Alarms ............................................. 10

GA0006 Setting Options ...................................... 11

ECOSPHERE/16000 Series Guarded Access Chart ................ 12

LPB Series Guarded Access Chart .............................. 13

Profile Mode .................................................. 14

Change Data Mode ............................................ 14

Halt Conditions ................................................ 14

Blank Step ................................................... 15

Set Point Step ................................................. 15

Creating Files/Profiles .......................................... 16

Wait Steps ................................................... 20

Next Step .................................................... 21

Recycle Option ................................................ 21

Write Your Program ............................................ 22

WORKSHEETS ..................................................... 23

Programming Work Sheet .......................................... 23

Sample HAST Profile for LPB Chambers ............................ 24

Procedure for Programming HAST Profile ........................... 25

HAST Chamber Programming Instructions and Definitions .............. 31

Ecosphere Sample Program ...................................... 32

Ecosphere Sample Profile Worksheet .............................. 33

Clearing a Program ............................................ 34

Tuning/Programming Worksheet ..................................... 35

Guarded Access Chart .......................................... 35

Warm/Cold Start ................................................. 36

Changing the Position of a Switch ................................. 37

Despatch/Watlow 1500 Control Instruction Manual Page iii

List of Figures

Figure 1 illustrates the Watlow 1500 installed on the Series 16000 environmental

chamber control panel. ............................................. 4

Figure 2 DIP Switch Location and Orientation .............................. 36

List of Tables

Table 1 Watlow 1500 Displays ........................................... 4

Table 2 Watlow 1500 Keys .............................................. 5

Table 3 Watlow 1500 LEDs ............................................. 5

Table 4 GA0001 and 0002 PID Tuning Parameters .......................... 10

Table 5 GA0000 Alarms ............................................... 10

Table 6 Setting Options ............................................... 11

Table 7 Set Point Step Programming Detail ................................ 19

Table 8 Wait Steps ................................................... 20

Table 9 Despatch Sample Program ...................................... 32

Table 10 DIP Switch Selection .......................................... 37

Page iv Despatch/Watlow 1500 Control Instruction Manual

INTRODUCTION

This INTRODUCTION section provides an overview of the
Watlow 1500 controller. The microprocessor based
controller is capable of measuring, displaying and
controlling temperature and humidity from a variety of
inputs.

The controller is easy to use. Control functions, alarm
settings and other parameters are easily entered through
the front keypad. Limited data can be protected from
unauthorized changes with its guarded access mode
security system. Battery back-up protects against data
loss during AC power outages.

In this application the controller has been factory
configured to control temperature and humidity conditions
in your Despatch chamber. Under normal conditions, you
should not have to reprogram this controller. We have,
however, included reprogramming instructions in this
manual to help guide you through that process if it should
become necessary.

NOTE:
Your control has already
been configured at
Despatch. Use this manual
as a guide to typical settings.

CAUTION:
Before making changes to
your control, consult with
Despatch Industries Product
Service at 1-800-473-7373.

Despatch/Watlow 1500 Control Instruction Manual Page 1

Page 2 Despatch/Watlow 1500 Control Instruction Manual

INSTRUCTIONS

Operating

To start the controller, start the oven fans. When you
start the fans the following sequence will automatically
take place.

1. The controller will power up.

2. The controller MNTR DATA LED will light up and the
alarm indicator A1 will be flashing in the FUNCTION
display. Alarm A1 is an indication of power loss.

3. Clear the alarm by pressing the clear button on the
Watlow 1500.

4. The actual temperature and humidity will be shown in
the ACTUAL display located at the top of the control.
Press the SEL key to toggle between temperature
and humidity. Temperature will be displayed on
Channel 1. Humidity will be displayed on Channel 2.

NOTE:
Your control has already
been configured at
Despatch. Use this manual
as a guide to typical settings.

CAUTION:
Before making changes to
your control, consult with
Despatch Industries Product
Service at 1-800-473-7373.

Despatch/Watlow 1500 Control Instruction Manual Page 3

Watlow 1500 Control

The Watlow Series 1500 is a versatile microprocessor­based control; powerful, yet simple to learn.

Figure 1 illustrates the Watlow 1500 installed on the Series 16000
environmental chamber control panel.

Table 1 Watlow 1500 Displays

Display Description

Actual Shows the actual process conditions (dry bulb temp if CH-1 LED is on, RH% if

CH-2 is on.

Event Shows current status of all events. Lowest significant event is left justified

[instead of right justified as when events are shown in data display].
Step Shows which step the programmer is currently pointed to.
Function Describes the function or type of data being displayed in the data display.
Data Shows current value for the function being viewed. This display is effected by

the scroll up and down keys.

Page 4 Despatch/Watlow 1500 Control Instruction Manual

Watlow 1500 Control (Cont.)

Table 2 Watlow 1500 Keys

Key Description

CH SEL Selects either channel 1 or channel 2 for the ACTUAL display.
CLEAR Clears alarm codes from the FUNCTION display in the monitor data mode.

Clears the step in the STEP display in the change data mode when the unit
is in the halt condition. Clears all 51 programmed steps when the unit is in
the halt condition, and in the guarded access area of the change parameter
mode.

RE-START Returns the controller to the initial program step only in the program halt

condition.

RUN/HALT Starts or stops the program. The processor will resume a program where it

was interrupted, unless the RESTART key was pressed, or the step number
or set point data at the current step was changed during the halt condition.

MODE Selects either the monitor data, change data or change parameter mode.
FCTN The FUNCTION key steps through the prompts in each of the three modes.
ENTER Enters the selected data or next step operations in the change data and

change parameter modes.
Increases and decreases the value in the DATA display. A light touch

changes the value by one. Holding the key down causes the DATA display
to increase rapidly.

Table 3 Watlow 1500 LEDs

LED Description

CH-1 CH-2 Indicates the channel in the ACTUAL display.

EEF Indicates the value in the ACTUAL display is temperature in EF.
EEC Indicates the value in the ACTUAL display is temperature in EC.

%RH Indicates the value in the ACTUAL display is per cent relative humidity.
PROG END Indicates that the processor has reached the end of the program.
PROG HALT Indicates that the processor is in the halt condition. This may be caused by

pressing the RUN/HALT key or by a blank step in the program. Flashing
indicates that the processor is in remote-hold condition.

MNTR
DATA

CHG DATA Indicates the processor is in the change data mode.
CHG PARA Indicates the processor is in the change parameter mode.

Indicates the processor is in the monitor data mode. While in this mode the
Watlow 1500 is used as a set point controller or a process profiler.

TIME Indicates that the FUNCTION and DATA displays are showing time.

Despatch/Watlow 1500 Control Instruction Manual Page 5

Manual Set Point Controller

Use the following procedure to enter a dry bulb temperature,
RH%, or change auxiliary event status when the MNTR
DATA LED is on.

1. Press the RUN/HALT key so the PROG HALT LED
lights up.

2. Press the RESTART key.

3. Enter the dry bulb temperature.
a. Press the FCTN key until C1 is signaled in the

FUNCTION display.

b. Update the dry bulb temperature by using up/down

arrow keys.

c. Press enter when the desired set point is signaled in

the data display.
Your set point is now in effect.
If the set point shown in the DATA display is higher than

the value shown in the ACTUAL display for CH-1, then
the heat LED near the Watlow 1500 should be on.

If the set point in the DATA display is lower than the
value in the ACTUAL display for CH-1, then the cool
LED should be on.

Page 6 Despatch/Watlow 1500 Control Instruction Manual

Manual Set Point Controller (Cont.)

4. Enter the %RH. The humidity event must be off when
outside of the range 4EC to 98EC. Humidity beyond
these extremes can result in equipment damage. If a
dry air system and an electronic humidity sensor are
installed in lieu of a wet bulb sensor, the optional dry
air event may be outside the range of 4EC to 98EC.

a. Press the FCTN key. C2 is shown.
b. Update the %RH temperature by using the up/down

keys.

c. Press enter when DATA display shows your desired

set point.

5. Change the auxiliary events.
a. Press the FCTN key. E1 is displayed.
b. Turn the auxiliary event on or off.

NOTE:
In the DATA display the right
most character for Event 11
is shown as 0001.

1 = on
0 = off

Try varying set points and events and watch how each
effects the output LEDs.

Despatch/Watlow 1500 Control Instruction Manual Page 7