Despatch LAD2-24-3 Owner's Manual

P/N 116095
REV. 8/95
C-146
US $75.00
Instruction Manual for the
LAD Series
LAD Series Despatch Ovens are bench ovens to 343°C (650°F) with forced convection airflow.
Model Volts Heater watts Amps Hz* _ Phase
LAD 1-42 240 3,000 15.6 50/60 1
LAD 2-11 208 9,000 29.8 60 3
| 240 9,000 26.1 60 3
480 9,000 13.1 60 3
LAD 2-24 208 16,000 52.4 60 3
- 240 16,000 46.0 60 3
480 16,000 23.0 60 3
* A kit is required for 240V - 1 PH - 50Hz operation. Units will operate on a 220V -1PH - 50Hz
line. Units are modified for 3PH, 50Hz operation
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 612-781-5353.
Thank you for choosing Despatch.
Sincerely,
Despatch Industries
Copyright © August 24, 1995 by Despatch Industries
PREFACE
This manual is your guide to the Despatch oven. It is organized
to give you the information you need quickly and easily.
The INTRODUCTION section provides an overview of the
Despatch oven.
The THEORY OF OPERATION section details the function
and operation of assemblies and subassemblies on the Despatch
oven.
The INSTRUCTIONS section provides directions on un-
packing, installing, operating and maintaining the Despatch
oven. |
The APPENDIX section contains Special Instructions for
operating the control instrument, a Troubleshooting Table, a list
of Accessories and a Warranty.
An efficient way to learn about the oven would be to read the
manual while working with the corresponding oven control
system. This will give you practical hands-on experience with
information in the manual and the oven.
Before operating the equipment, be sure you understand all of the
technical information contained in this manual. 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.
Page i
| PREFACE
HELP-LINE | Despatch LAD Series Instruction Manual
800-473-7373 C-146
Table of Contents
Table of Contents ........00000000000000000000 11
List of Illustrations ......0.0..0000000000000000004 IV
List of Tables .......ceroo0orersccareececar e. IV
INTRODUCTION ......eñeeoeces... I
Special Features .......e.errerreereccaroocaredl
Specifications ......e...eoeresvrrrerrrccarecnr 2
Dimensions Capacities ........eeremeresecared3
Power .......eoreorverecaveracaorreres 3
Temperature ........eerrerserrrrsrcorcare $
THEORY OF OPERATION ................. Cea
Protocol” vse eee ee
Keypad Controls .........ee.eereeereroeaoo
Status Indicator LEDs .. |
Operating Modes . . .
Manual Mode . . .
Timer Mode .... , e...
Program Mode .......reeeesereocorero:
Calibration Zero Offset .................... 10
Tune Setting ........w_.eccereresvereace.. 1
Protocol "* Hi-Limit ........r_eereccoocaccoo 12
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INSTRUCTIONS .........
Unpacking and Inspection .........rre.erreoo.. 13
Setup .....e.eoreorscororrer rear enero. 14
Operating .....0.000000000000 0000000000000 19
Loading the Oven ........... RS
Pre-Startup Checklist ..................... 16
Manual Mode ...........4............18
Startup... 18
Run .....eeo0co8srrrcesecacoo.... 18
Stop.....e.eocorecrrerecroreree. 19
Timer Mode ........re..e.o. Cee 20
Startup .......eooreerercroarearer ZO
Manual Stop ........00.000000000004040 22
Program Mode .......w.ereerreorcaroo 23
Startup ........—ee.ersrrrrererarees 23
Manual Stop ..........ererercsccos 2
Maintenance ........oorrereoecococrerceone. 28
Checklist ..........oreserccorecorecioe. 28
Tests .......0.rcsecaarrorerrerare e... 29
Replacement ......worrrcoorerrccacares. 29
Parts ......r_erceroooorrorococe.. ... 29
Page ii
PREFACE
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Table of Contents (Cont.)
Protocol” Instrument .......eeeeereserro. 30
Heater Unit .....0000000000 00000000000 31
Fan Motor +.0.00000000000 0000000000000 32
APPENDIX 220000000000 0 0 sa 0 0 sa eee 0 eee 006 35
Special Instructions ..........ereeesrerecearo. 35
Control Instrument .........oeooreereconn. 35
Tune Mode .......ereeooceorecocoree. 35
Tuning Outline ...........re.e.r..... 6
Tuning Worksheet .................. 37
Calibration Mode ....... RAA 38
Calibration Instructions . ............. 38
Diagnostics Mode .........wrereeevonoo 44
Power Failure .........eoooccrrorrereeoo 45
Programming Examples and Outline ........... 46
Example 1 - Manual Mode ............e.. 46
Example 2 - Timer Mode .............e.. 47
Program Mode .........e.crercccrocroo 48
Program Worksheet ............—eo.e. 50
Example 3 - Program Mode ........... 51
Example 4 - Program Mode ...... eee 52
Example 5 - Program Mode ........... 53
Troubleshooting ......000000000000 0000010000 54
Accessories ......reoorreccrrevcrrrrecor e. 56
Warranty ......eooorerecrerarararr ererece 57
Despatch Classic” Service Warranty Program .... 57
Immediate Service Response .........re... 57
Field Service Network ....... RARE 57
Best Service Protection in the Industry! ...... 58
Classic’“ Series Warranty .....0.000000000 00060 59
Parts and Material ......0000000000000000 59
Labor and Expenses ..........ee..e.e.... 59
Exclusions/Limitations of Liability .......... 59
Emergency Service ...... _rereererveooo 60
Non-Compliance ......e.o_eeeesesrerer. 60
Despatch Customer Service .....0.00000000000 000 61
Procedures and Customer Responsibilities ....... 61
Attachment A - Sustained Service Support ...... 62
Page iii
PREFACE
HELP-LINE Despatch LAD Series Instruction Manual
C-146
800-473-7373
List of lllustrations
Figure 1 illustrates the precision horizontal airflow. ......... 5
Figure 2 illustrates the control panel. ........e_rrree.... 6
Figure 3 illustrates the CZO function in the tune mode of
Protocol". ........_.e.ceooccoorrrrrrrecare. 10
Figure 4 illustrates the control panel on the LAC Series oven.
Ce eee ee 17
Figure 5 shows the top view of the J type thermocouple inputs on
ProtocOl™. vo tee i eee
Figure 6 shows the top view of the ] type thermocouple inputs on
Protocol ™, ove ie eee 38
Figure 7 illustrates a sample profile. .................. 50
Figure 8 illustrates an example temperature profile. ....... 51
Figure 9 illustrates an example temperature profile. ....... 52
Figure 10 illustrates an example temperature profile. ...... 53
Figure 11 illustrates the Classic ™4 Plus 1 Service Program .. 58
List of Tables
Table 1 Dimensions ...........0r0.r0rec0cecedrror ee. 2
Table 2 Capacities .........ererescrcrorerer ere... 3
Table 3 Power Requirements .......... e anocor coa. 3
Table 4 Temperature ........errereesorercereerare 4
Table 5 Protocol“ Keypad Controls ..........reeressoo> 7
Table 6 Protocol” Touchkeys ......e...oerresescaocan. 7
Table 7 Protocol“ Indicator LEDs ......... eee 8
Table 8 Calibration Zero Offset Examples .............. 11
Table 9 Factory PID Settings ........e.r_e.ereserercoo 11
Table 10 Tuning Outline ........._rre.erororcrerev. 36
Table 11 Tune Mode Parameter Calibration ............. 40.
Table 12 Diagnostics Mode Outline .........w.e.ese—.. 44
Table 13 Manual Mode Example ..........ee.e.eso—m. 46
Table 14 Timer Mode Example ........re.reeseoco—.. 47
Table 15 Program Mode Outline .............eee.... 48
Table 16 Accessories ......rrecorsrrerac ere rece... 56
Page iv
PREFACE
Despatch LAD Series Instruction Manual
C-146
HELP-LINE
800-473-7373
INTRODUCTION
This section provides an overview of the Despatch LAD Series
ovens. The LAD Series Ovens have the most effective heat
distribution and the fastest processing time of any lab oven its size.
Air is discharged from the left side wall of the oven and circulates
through the chamber.
Special Features
The sturdy construction and 4 inch insulation, (5 inches in the
front) of the Despatch LAD Series ovens contribute to excellent
temperature uniformity.
Despatch LAD Series ovens also incorporate a modular
microprocessor based digital control. The Despatch Protocol ™
temperature controller features:
PID tuning,
e programmable up to 48 segments,
e built-in manual reset Hi-Limit control,
+ built-in process timer,
e self-diagnostics,
+ digital display,
e three (3) event outputs,
e recursive profile capability,
+ optional RS-422/RS-485 capability.
HELP-LINE
800-473-7373
Page 1
“INTRODUCTION
Despatch LAD Series Instruction Manual
C-146
Special Features (Cont.)
Other special features include the following.
e Unique Despatch design to combine higher fan volume of
forced recirculated air with a system of perforated stainless
steel walls for the ultimate in temperature uniformity.
o Welded double wall construction and fiberglass insulation to
reduce heat loss. Silicone rubber gaskets further minimize
heat leakage.
e Rapid response heater with a 5 year warranty.
e Scratch-resistant Silver-Clay® baked enamel exterior and
stainless steel interior for easy cleaning.
e Space-saving, stackable design on the LAD 1-42 model
only.
Specifications
Table 1 Dimensions
LAD 1-42 20 18 20 4,2 33 34 45 9
(50) | (46) | (51) (120) (84) (86) (114)
LAD 2-11 38 20 26 11.0 54 34 69 6
96) | (50) | (66) (310) (137) (86) (175)
LAD 2-24 48 24 36 24.0 66 38 81 9
(122) | (61) | (91) (680) (168) (97) (206)
Page 2
INTRODUCTION
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Dimensions Capacities
Table 2 Capacities
Maximum Load Lbs 150 180 300
Maximum Shelf Load Lbs 30 60 100
Exhaust СЕМ Adjustable Adjustable Adjustable
to 12 to 19 to 80
Recirculating Fan CFM 300 1,000 1,5
H.P Ya 1 2
Approximate Weight Net Lbs. 350 745 1,015
KG 159 339 461
Approximate Shipping Weight Lbs. 480 | 1,045 1,415
° КС 218 475 643
Power
Line voltages may vary in some geographical locations. If your
line voltage is much lower than the oven voltage rating, warm up
time will be longer and motors may overload or run hot. If your
line voltage is higher than name plate rating, the motor may run
hot and draw excessive amps.
If the line voltage varies more than 10% from the oven voltage
rating, some electrical components such as relays, temperature
controls, etc. may operate erratically.
LAD 142 240 15.6 50/60 1 3
LAD 2-11 208 29.8 ‚ 60 3 9
240 26.1 60 3 9
480 13.1 60 3 9
LAD 2-24 208 52.4 60 3 16
240 46.0 60 3 16
480 23.0 60 3 16
* A kit is required for 240V - 1PH - 50Hz operation. Units will operate on
a 220V - 1 PH - 50 Hz line. Units are modified for 3 PH, 50Hz operation.
Page 3
| INTRODUCTION
HELP-LINE Despatch LAD Series Instruction Manual
800-473-7373 C-146
Temperature
Table 4 Temperature
Time to Temperature 25°C -100°C 6 5 3
(approximate minutes with 25°C - 200°C 21 14 12
no load) 25°C - 343°C 56 32 30
Recovery Time Door Open 1 Min. 100°C <1 <1 <1
(approximate minutes with 200°C 3 2 2
no load) 343°C 10 7 4
Temperature Uniformity at 100°C* | 1°C +1°C +1°C
200%C* | +2°C +2°C +2°C
343°C*| x3°C +3°C +3°C
Minimum Operating Temperature dampers open | 40°C 30°C 30°C
(Approximate w/20°C ambient) dampers closed | 50°C 40°C 55°C
Control Stability +0.3°C | +0.3°С +0.3°C
Repeatability +0.5°C +0,5°C +0.5°C
Cooldown Time 343 - 50°C dampers open 108 56 26
(approximate 343 - 75°C dampers closed 130 150 200
minutes with no load)
—* Figures are based on actual tests in an empty oven.
Uniformity can vary slightly depending on unit and
operating conditions.
Page 4
INTRODUCTION
Despatch LAD Series Instruction Manual
C-146
HELP-LINE
800-473-7373
THEORY OF OPERATION
This section details the function and operation of assemblies and
subassemblies on the Despatch LAD Series Ovens. These ovens
have the most effective heat distribution system and the fastest
processing time of any lab oven its size. They are especially useful
for testing, preheating, sterilizing, drying, aging and curing as well
as other production applications. Horizontal airflow with
precision digital control delivers uniform, fast processing. The
overall result is efficient productivity under strenuous conditions.
Fresh Air
Figure 1 illustrates the precision horizontal airflow.
The unique Despatch computerized design, moves forced
convected heat through perforated stainless steel walls. The air is
recirculated with a high volume fan. Despatch LAD Series
Ovens employ higher volume fans than any competitive model.
The chamber can be densely loaded without interfering with the
process. Air delivery temperature is within 1°C of the number
appearing on the digital display. Also, fresh air intake is regulated
by a panel-mounted damper control, while the exhaust rate is
fixed. The exhaust rate is regulated by an adjustable control on
the exhaust stack (LAD 2-11 and LAD 2-24). The exhaust rate
is fixed in the LAD 1-42. The exhaust port, on the back of the
LAD 1-42, is covered by a hat bracket. Do not remove the hat
bracket.
HELP-LINE
800-473-7373
Page 5
THEORY OF OPERATION
Despatch LAD Series Instruction Manual
C-146
Protocol™
The ovens are equipped with a modular microprocessor based
digital temperature controller.
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Figure 2 illustrates the control panel.
The Despatch Protocol ™ temperature controller is a dual
functioning controller/high limit instrument. The control portion
of Protocol™ incorporates a microprocessor to digitally control
process variables with minimal temperature fluctuations.
The high limit portion of Protocol™ protects the product and/or
the oven itself. If the product being processed has a critical high
temperature limit, the Hi-Limit parameter should be set to a
temperature somewhat below the temperature at which the
product could be damaged. If the product does not have a
critical high temperature limit, the Hi-Limit parameter should be
set to a value slightly higher than the highest programmed
setpoint to protect the oven equipment.
Page 6
THEORY OF OPERATION
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Keypad Controls
The Despatch Protocol™ temperature controller has six keys that
provide the six operating modes. °
Table 5 Protocol™ Keypad Controls
Mode Display Code | Function Description
Manual MANUAL Operation Single setpoint control
Timer TIMER Operation Single setpoint control with process timer
Program PROGRAM Operation Programmable control with three event outputs
Tune TUNE Configure Set instrument parameters
Calibrate | CALMODE Service Performs instrument calibration
Diagnostics | DIAGNOSE | Service Performs instrument thermocouple tests, SSR
power level and event output tests.
The Despatch Protocol™ temperature controller also has ten
(10) touch-keys so that the user can easily operate the controller.
Table 6 Protocol™ Touchkeys
Key Description
A To move up through any mode
v To move down through any mode
+ To increase a setpoint or parameter
- To decrease a setpoint or parameter
Home To move to the beginning of any mode or segment
Reset To reset the control when an error has been corrected or to view the profile number,
segment number and the number of loops (repeat times) remaining.
Heater On To initiate heater relay
Heater Off To disengage heater relay
Start To start an operating mode
Stop To stop an operating mode
— Page?
THEORY OF OPERATION
HELP-LINE Despatch LAD Series Instruction Manual
800-473-1373 C-146
Status Indicator LEDs
Protocol™ has seven indicator LEDs that provide the following
relevant information to the user.
Table 7 Protocol™ Indicator LEDs
LED Function
|| Power on Lights when the power on pushbutton is pressed.
Heater relay Lights when a mode is ready for operation and the heater on key is pressed.
Soak Deviation Lights when the process temperature is not held within the user specified soak
deviation limits. The light turns off when the temperature is within the soak
deviation limit.
Over Temp Lights when the process temperature exceeds the high limit value. The over
temperature light remains lit until the Reset key is pressed.
Control T/C Error Lights when Protocol ™ receives a control thermocouple error.
Heater on Lights when the heater is activated by the control circuits.
Hi-Limit T/C Error | Lights when Protocol™ receives a Hi-Limit thermocouple error.
The Despatch Protocol ™ temperature controller has been
designed for ease of use while maintaining elaborate and versatile
control capabilities. :
Operating Modes
Protocol™ has three primary modes of operation: the Manual
mode, the Timer mode and the Program mode.
Manual Mode
The manual mode is a single setpoint control mode that controls
the process at the user specified setpoint for an indefinite period
of time. The manual mode controls the oven temperature within
close limits as specified by the PID tuning parameters.
Whenever the instrument is powered by the Power on
pushbutton, Protocol™ starts at the manual mode.
Page 8
THEORY OF OPERATION
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Timer Mode
The timer mode is a single setpoint control mode with a built-in
process timer that starts timing either at the beginning of the
process or at a user specified temperature. As in the manual
mode, the timer mode uses the PID parameters set in the tune
mode.
Program Mode
The program mode is a programmable ramp and soak control
consisting of up to eight profiles. Each profile consists of up to six
segments for a total of 48 segments (8 x 6 = 48). Any one profile
may be run recursively from two to 99 cycles or even
continuously if it is desired.
Each segment consists of a ramp and soak period. During the
ramp period, the control will track oven temperature. For
example, a ramp is entered to heat from 100°C to 150°C in 50
minutes. Protocol™ will track the temperature 1°C every minute
for 50 minutes. During the soak period, temperature is
maintained as specified by the tuning and soak deviation
parameters.
Protocol™ will not allow a soak time to begin until the actual
oven temperature is within the soak deviation limit. This process
is called assured soak. The ramp and soak periods are adjustable
from O to 99 hours, 59 minutes. Within each ramp and soak
period, up to three event outputs can be programmed either on
or off.
The event relay is used for factory installed modifications, then
disconnected before shipping. Please consult the factory for
information on connecting the event outputs. When the events
are connected, the user has the capability of controlling relays,
solenoid valves, etc., throughout the programming cycle.
HELP-LINE
800-473-7373
Page 9
THEORY OF OPERATION
Despatch LAD Series Instruction Manual
C-146
Calibration Zero Offset
The Calibration Zero Offset (CZO) of Protocol ™ has been preset
and tested for the specified operating conditions. Special
instructions for accessing the tune mode to change the CZO are
referred to in the Appendix of this manual.
CZO 0.0
Figure 3 illustrates the CZO function in the tune mode of Protocol™.
The CZO may be useful to make the following small temperature
corrections to the control system.
e Correction of known sensor calibration errors.
e Correction of any known steady temperature offset between
the heated work-piece (load) and sensor. This is useful for
applications where the sensor cannot be located exactly at
the work-piece.
e Alignment of temperature indications in a multi-zone/multi-
controller application, e.g, at ambient temperature.
Note that the CZO changes the value of the controlled
temperature when used in closed loop control. The CZO
function can be represented by the equations:
Temp Indication (°F) = Sensor Temp (°F) - CZO% [100 (°F) - Sensor Temp (°F)]
Temp Indication (°C) = Sensor Temp (°C) - CZO% [38 (°C) - Sensor Temp (°C)]
The CZO function is a straight line pivoted around 100°F
(38°C). Thus, the CZO functions as an offset and has the ability
to change the slope of a temperature range.
Page 10
THEORY OF OPERATION |
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Calibration Zero Offset (Cont.)
Table 8 Calibration Zero Offset Examples
CZO Temperature Offset °F | Temperature
Display | measured by sensor | Indication
0.0 10.0 20.0 100°F
100°F | 200°F 0° 0°
20° 100°F 100°F 180°F
A more useful formula is one that the user can use to calibrate
Protocol™ to match the center of the chamber. This requires the
use of a temperature measuring device with its thermocouple
junction located at the center of the chamber. CZO can be
directly calculated by:
CZO = 100 Center Temp (°F) - Protocol™ Display (°F)
Center Temp (°F) - 100 (°F)
CZO = 100 | Center Temp (°C) - Protocol" Display (*C)
Center Temp (°C) - 38 (°C)
Tune Setting
The Protocol™ has been preset and tested for normal operating
conditions. Special instructions for changing the tune setting are
referenced in the Appendix of this manual.
The Protocol™ on the oven can be manually tuned. For your
convenience the factory has tested and preset the PID action to
its optimum values. These values need not be changed under
. normal operating conditions.
Table 9 Factory PID Settings }
| Proportional Band Reset Time Rate Time |
5°C 30 seconds/repeat | O degrees/second |
Page 11
THEORY OF OPERATION
HELP-LINE Despatch LAD Series Instruction Manual
800-473-7373 C-146
Protocol™ Hi-Limit
Protocol™ will not let the high limit value drop below the
setpoint value. In certain situations, it may be necessary to
change the setpoint first and then adjust the high limit value.
It will be necessary to reset the Hi-Limit whenever it has tripped.
The Hi- Limit may be reset by first allowing the oven chamber to
cool slightly (or increasing the parameter by several degrees) and
pushing the Reset key. During a high limit condition the Over
Temp LED will turn on thus deactivating the heater.
Page 12
THEORY OF OPERATION
Despatch LAD Series Instruction Manual
C-146
HELP-LINE
- 800-473-7313
INSTRUCTIONS
This section provides directions on unpacking, installing,
operating and maintaining the Despatch LAD Series Ovens.
Unpacking and Inspection
Remove all packing materials and thoroughly inspect the oven for
damage of any kind that could have occurred during shipment.
See whether the carton and plastic cover sheet inside carton
are still in good condition.
Look at all outside surfaces and corners of the oven for
scratches and dents.
Check the oven controls and indicators for normal
movement, bent shafts, cracks, chips or missing parts such as
knobs and lenses.
Check the door and latch for smooth operation.
If there is damage, and it could have happened during shipment
follow these instructions.
1. Contact the shipper immediately and file a written damage
claim.
2. Contact Despatch Industries to report your findings and to
order replacement parts for those that were damaged or
missing.
3. Please send a copy of your filed damage claims to Despatch.
HELP-LINE
800-473-7373
Page 13
INSTRUCTION
Despatch LAD Series Instruction Manual
C-146
Unpacking and Inspection (Cont.)
4. Next, check to make sure you have received all the required
materials. Your shipment should include:
e One (1) Despatch oven,
e One (1) Instruction manual,
e One (1) Warranty card,
* Two (2) Shelves
5. If any of these items are missing from the packaged
contents, contact Despatch Industries to have the
appropriate materials forwarded to you.
6. Finally, to protect the warranty on your new oven, complete
the warranty card and mail it to Despatch within 15 days
after receipt of the equipment.
Set-up
1. Place oven on a bench top or an optional cabinet base.
The oven must have a minimum 2 inch clearance in the
rear to provide proper ventilation. When placed next to
another cabinet, or next to another oven, a 3 inch clearance
is required. The doors will still open.
2. Make sure oven is level and plumb; this will assure proper
heat distribution and operation of all mechanical
components.
3, Identify correct power source indicated on the specification
plate.
4. Plugor hardwire oven directly to the electric supply.
Page 14
INSTRUCTIONS
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Operating
Users and operators of this oven must comply with operating
procedures and training of operating personnel as required by the
Occupational Safety and Health Act (OSHA) of 1970, Section 5
and relevant safety standards, and 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.
Loading the Oven
Despatch Industries cannot be responsible for either the process
or process temperature used, or for the quality of the product
being processed. It is the responsibility of the purchaser and
operator to see that the product undergoing processing in a
Despatch oven is adequately protected from damage.
Carefully following the instructions in this manual will help the
purchaser and operator in fulfilling that responsibility.
When loading the oven avoid spills of anything onto the heater
elements or onto the floor of the oven. Do not place the load on
the oven floor plate. This may cause the load to heat unevenly
and the weight may cause shorting out of the heater elements.
Use the shelves provided.
The two shelves are designed to be pulled out about half way
without tipping. The support capacity of the shelves is listed in
the Capacities Table in the Specifications section in this manual,
Do not overload the shelves.
Distribute the workload evenly so that airflow is not restricted.
Do not overfill your oven. The workload should not take up
more than two-thirds of any dimension of the inside cavity.
Page 15
INSTRUCTION
HELP-LINE Despatch LAD Series Instruction Manual
800-473-7373 C-146
Pre-Startup Checklist
7 Know the system. Read this manual carefully. Make use of
its instructions and explanations. The know how of safe,
continuous, satisfactory, trouble-free operation depends
primarily on the degree of your understanding of the system
and of your willingness to keep all parts in proper operating
condition.
v Check line voltage. Voltage must correspond to nameplate
requirements of motors and controls. Refer to the section
on power connections in the INTRODUCTION of this
manual.
/ Fresh air and exhaust. Do not be careless about restrictions
in and around the fresh air and exhaust openings and stacks.
Under no condition permit them to become so filled with
dirt that they appreciably reduce the air quantity. The
proper ventilation clearances should be fulfilled at all times.
Refer to the Set-up instructions in this manual.
/ Ventilation There is an exhaust opening in the rear of the
unit that is covered by a hat bracket. Do not remove the
hat bracket as it protects the exhaust opening from being
completely covered.
7 Helpful hints
For drying ovens, open vent to prevent buildup of moisture.
For sample heating, close the vent when no ventilation is
required.
Page 16
INSTRUCTIONS
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Startup
For fastest oven heat-up time, close the fresh-air vent. After the
desired temperature is reached, the vent may be adjusted as
needed. An outline and examples for the Manual mode, Timer
mode and Program mode are referenced in the Appendix. A
completed typical program worksheet accompanies all
programmable event outputs installed at the factory.
1. Start the fan.
a. Open the oven door.
b. Press the Power on pushbutton. You will hear the .
recirculating fan start.
c. Shut the oven door.
d. Check that the green Power on LED is on.
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5. Vila ar eig Cor ie Saale, Pr STOP Se nav cma =. 7 7 as ©
nino ¿mentre nta OOOO =
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Figure 4 illustrates the control panel on the LAC Series oven.
2. Program the Protocol” for the desired operating mode.
Refer to the following instructions for the Manual mode, the
Timer mode and the Program mode.
Page 17
— INSTRUCTIÓON
HELP-LINE Despatch LAD Series Instruction Manual
C-146
800-473-1373
Manual Mode
Startup
The following are startup instructions for the Manual mode.
1. Select the Manual mode. Press the Power on key or the
Manual key. MANUAL will be displayed.
2. Enter the high limit temperature.
a. Press the v key. HI-LIMIT will be displayed.
b. Press the v key.
c. Use the + or - keys to enter the high limit temperature
to a value slightly higher than the intended setpoint.
3. Enter the setpoint.
a. Press the y key. SETPOINT will be displayed.
b. Press the v key.
c. Use the + or - keys to enter the setpoint to the desired
operating temperature.
Run
The following are run instructions for the Manual mode.
1. Press the y key. READY will be displayed.
2. Press the Heater on key. The Heater Relay LED will
illuminate.
3. Press the Start key. The Heater on LED will illuminate
and the setpoint and actual temperature will be displayed.
As oven temperature approaches setpoint, the Heater on _
LED will cycle on and off.
Page 18
INSTRUCTIONS
Despatch LAD Series Instruction Manual | HELP-LINE
— C-146 800-473-7373
Stop
The following are stop instructions for the Manual mode.
1.
4.
5.
An example of the Manual mode is referenced in the Appendix.
Press the Heater off key. The Heater Relay LED will
shut off.
Wait for oven temperature to fall below 100°C (212).
When the Manual mode is complete, press the Reset key
to display the final process temperatures.
Press the Stop key.
Press the Power on pushbutton to turn power off.
HELP-LINE
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Page 19
INSTRUCTION
Despatch LAD Series Instruction Manual
C-146
Timer Mode
Startup
The following are startup instructions for the Timer mode.
1. Select the Timer mode. Press the Timer key. TIMER will
be displayed.
2. Enter the high limit temperature.
a. Press the v key. HI-LIMIT will be displayed.
b. Press the v key.
c. Use the + or - keys to enter the high limit temperature
to a value slightly higher than the intended setpoint.
3. Enter the setpoint.
a. Press the v key. SETPOINT will be displayed.
b. Press the v key.
c. Use the + or - keys to enter the setpoint to the desired
operating temperature.
4. Enter the process time.
a. Press the v key. TIME will be displayed.
b. Use the + or - keys to enter the time of the process.
(HHMM (hours/minutes) or MMSS (minutes/
seconds) selected in the tune mode.)
Page 20
INSTRUCTIONS
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Startup (Cont.)
5. Enter timer starting temperature.
a. Press the y key. TEMP YES/NO will be displayed.
b. Use the + or - keys to select either YES or NO.
o Press the - key to display NO and begin timing at
ambient.
o Press the + key to display YES and begin timing at
the following input temperature.
c. Press the y key. TEMP and the begin timing
temperature will be displayed.
d. If YES was selected in step b, use the + or - keys to
enter the temperature at which the process timer begins
timing.
If NO was selected in step b, this setpoint has no
bearing on oven operation.
Run
The following are run instructions for the Timer mode.
1, Press the y key. READY will be displayed.
2. Press the Heater on key. The Heater Relay LED will
illuminate.
3. Press the Start key. The Heater on LED will illuminate -
and the setpoint and the actual temperature will be
displayed. As the oven temperature approaches the
setpoint, the Heater on LED will cycle on and off.
Page 21
| INSTRUCTION
HELP-LINE Despatch LAD Series Instruction Manual
800-473-7373 | C-146
Manual Stop
The following are manual stop instructions for the Timer mode.
1. Press the Heater off key.
2. Wait for oven temperature to fall below 100°C (212°F).
3. When the Timer mode is complete, press the Reset key to
display the final process temperatures.
4. Press the Stop key.
5. Press the Power on pushbutton to turn power off.
An example of the Timer mode is referenced in the Appendix of
this manual.
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INSTRUCTIONS
Despatch LAD Series Instruction Manual
C-146
HELP-LINE
800-473-7373
Program Mode
Startup
The following are startup instructions for the Program mode. In
any one segment, if the ramp and soak times are zero, Protocol ™
ignores the remaining segments of the profile. A soak period will
not begin until the actual oven temperature is within the soak
deviation limit. During any segment of a profile, if the actual
oven temperature falls outside of the soak deviation limit, the
Soak Deviation LED will be illuminated.
1. Select the Program mode. Press the Program key.
PROGRAM will be displayed.
2. Enter the high limit temperature.
a. Press the v key. HI-LIMIT will be displayed.
b. Press the v key. The high limit temperature will be
displayed.
c. Use the + or - keys to enter the high limit temperature
to a value higher than the intended setpoints.
3. Enter the profile number.
a. Press the v key. PROFILES will be displayed.
b. Press the v key. PRO - 1 will be displayed.
c. Use the + or - keys to enter the profile number to
program.
Page 23
INSTRUCTION
HELP-LINE Despatch LAD Series Instruction Manual
800-473-7373 C-146
Startup (Cont.)
4. Program the profile.
a. Press the v key. SEG - 1 will be displayed.
b. Program the ramp rate.
i. Press the y key. RAMPO001 will be displayed.
ii. Use the + or - keys to enter the ramp time.
c. Program the events desired during the ramp time.
i. Press the v key. EVENTS will be displayed.
ii. Press the v key for each event.
iii. Use the + or - keys to program the event outputs
ON or OFF for the ramp period.
d. Program the ramp ending temperature.
i. Press the v key. TEMP and the ramp ending
temperature will be displayed.
ii. Use the + or - keys to enter the desired ramp
ending temperature.
e. Program the soak time.
i. Press the ¥ key. SOAK and the soak time will be
displayed.
ii. Use the + or - keys to enter the soak time.
f Program the events desired during the soak time.
i. Press the y key. EVENTS will be displayed.
ii. Press the v for each event.
iii, Use the + or - keys to program the event ON or
OFF for the soak period.
Page 24 |
INSTRUCTIONS |
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Startup (Cont.)
g. Enter the remaining segments 2-6 by following steps a
through f.
5. Enter the Soak-Deviation.
a. Press the v key until SOAK-DEV is displayed.
b. Press the v key. The symbol + will be displayed.
c. Use the + or - keys to enter the soak deviation limit.
6. Enter the next profile.
a. Press the y key. GOTO will be displayed.
b. Use the + or - keys to enter the profile number to
continue to.
Options include END and 1 through 8. Select End to
stop at the end of this profile. For continuous profiles
enter the same number of the profile that is currently
being programmed.
7. Enter the number of profile recursions.
a. Press the v key. REPEAT will be displayed.
b. Press the v key. TIMES will be displayed.
c. Use the + or - keys to enter the number of times to
complete the profile being programmed (1 - 99).
Page 25
| INSTRUCTION
HELP-LINE | Despatch LAD Series Instruction Manual
800-473-1373 C146
Startup (Cont.)
8. Enter the profile end condition. The hold command is
contingent on the final segment of the last profile to be run -
only.
a. Press the v key, HOLD will be displayed.
b. Use the + or - keys to select YES or NO.
Selecting YES will hold at last setpoint. The event
outputs will be held at their last value.
Selecting NO will not hold at last setpoint. The event
outputs will be turned off.
Run
The following are run instructions for the Program mode.
1. Press the Home key until PROGRAM is displayed.
2. Press the ¥ key until PRO - 1 is displayed.
3. Make sure the correct starting profile is entered by pressing
+ or -.
4. Press the a key until READY is displayed.
5. Press the Heater on key. The Heater Relay LED will
illuminate.
6. Press the Start key. The Heater on LED will illuminate.
As the oven temperature approaches the setpoint, the
Heater on LED will cycle on and off. During processing,
the display shows the setpoint on the left and the actual
oven temperature on the right.
Page 26
INSTRUCTIONS
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Manual Stop
The following are manual stop instructions for the Program
mode.
1. Press Heater off key.
2. Whit for oven temperature to fall below 100°C (212°F).
3. Press the Reset key to display the final process tempera-
ture.
4. Press Stop key.
5. Press Power on pushbutton to turn power off.
Examples of the Program mode are referenced in the Appendix
of this manual.
Page 27
INSTRUCTION
HELP-LINE | Despatch LAD Series Instruction Manual
800-473-7373 - C-146
Maintenance
Do not attempt any service on this oven before opening the main
power disconnect switch.
Checklist
/ Keep equipment clean. Gradual dirt accumulation retards
air flow. A dirty oven can result in unsatisfactory operation
such as unbalanced temperature in the work chamber,
reduced heating capacity, reduced production, overheated
components, etc. Keep the walls, floor and ceiling of the
oven work chamber free of dirt and dust. Floating dust or
accumulated dirt may produce unsatisfactory work results.
Keep all equipment accessible. Do not permit other
materials to be stored or piled against it.
/ Protect controls against excessive heat. This is particularly
true of controls, motors or other equipment containing
electronic components. Temperatures greater than 51.5°C
(125°F) should be avoided.
/ Establish maintenance & checkup schedules. Do this
promptly and follow the schedules faithfully. Careful
operation and maintenance will be more than paid for in
continuous, safe and economical operation.
v Maintain equipment in good repair, Make repairs
immediately. Delays may be costly in added expense for
labor and materials and in prolonged shut down.
/ Practice safety. Make it a prime policy to know what you
are doing before you do it. Make CAUTION, PATIENCE,
and GOOD JUDGEMENT the safety watchwords for the
operation of your oven.
/ Lubrication, Fan motor bearings are permanently lubricated.
All door latches, hinges, door operating mechanisms,
bearing or wear surfaces should be lubricated to ensure easy
operation.
Page 28
INSTRUCTIONS
Despatch LAD Series Instruction Manual
C-146
HELP-LINE
800-473-7373
Tests
Tests should be performed carefully and regularly. The safety of
personnel as well as the condition of equipment may depend
upon the proper operation of any one of the functions of the
Protocol™. Test the Protocol™ every 40 hours. Check that the
heater LED is cycling on and off, indicating that the heater is
working, In the manual mode, enter the HI-LIMIT to the same
value as the setpoint. Run manual mode. |
When the oven temperature reaches setpoint, the Hi-limit
should shut down the system. The HI-LIMIT must be manually
reset by pushing the Reset key.
Replacement
Parts
To order or return parts, contact the Service Products Division at
Despatch. The Service Products features our Response Center
for customer service. When returning parts, a Despatch
representative will provide you with an MRA (Material Return
Authorization) number. The MRA number must be attached to
the returned part for identification. When you are ordering parts,
be sure to give the model number, serial number and the part
number. This will expedite the process of obtaining a
replacement part. |
When you have a service need, contact the Response Center at
1-800-473-7373: FAX 612-781-5353.
Page 29
INSTRUCTION
HELP-LINE Despatch LAD Series Instruction Manual
800-473-7373 C-146
Protocol™ Instrument
(Tools needed: one quarter (74) inch socket set)
1. Disconnect the power.
2. Remove the screws from the face of the control panel and
slide it forward.
3. Disconnect the thermocouple wires and the ground wire.
4. Disconnect any event output wires, noting the proper
connections.
5, Disconnect the control panel from the oven by unplugging
the quick disconnect plug,
ОТО
Figure 5 shows the top view of the J type thermocouple inputs on
Protocol".
6. Connect the new control panel to the quick disconnect
plug.
7. Connect the thermocouple wires and ground wire.
8. Connect the event output wires (if applicable).
9. Replace the control panel.
Page 30
INSTRUCTIONS
Despatch LAD Series Instruction Manual
C-146
HELP-LINE
800-473-7373
Heater Unit
(Tools needed: Crescent wrench, screwdriver, one quarter (V4)
inch socket set)
1. Remove the floor plate.
a. Remove the screws from the floor plate.
b. Lift the floor plate out of the oven.
7. Disconnect the heater leads from heater element with a
wrench. Note which wires go on which terminals.
3. Unscrew the screws holding the heater frame to the oven
body.
4. Remove the heater and discard.
5, Screw down the new heater frame.
6. Attach the heater leads to appropriate terminals.
7. Replace the interior floor and screws.
HELP-LINE
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Page 31
INSTRUCTION
Despatch LAD Series Instruction Manual
C-146
Fan Motor
(Tools needed: Screwdriver, 5/32 inch Allen wrench, one
quarter (74) inch socket set)
1. Remove the floor plate.
a. Remove the screws from the floor plate.
b. Lift the floor plate out of the oven.
2. Remove the left side wall.
3. Remove the fan inlet plate.
4. Loosen the set screws (2) on fan wheel in middle of oven
bottom. You can reach the fan wheel by going through the
heater or by disconnecting and removing the heater. Refer
to the Heater Unit instructions.
5. Place the oven on its back.
6. Remove the bottom plate. This will reveal the fan motor.
7. Remove the fan motor.
a. Unscrew the screws (4) holding motor mounts to the
body.
b. Disconnect the motor leads from the terminal strip on
the power panel.
c. Lift the fan motor from the oven body.
After the fan wheel has run at temperature for awhile, it will
stick to the shaft. Some force may be required to separate
the fan wheel from the fan motor shaft.
8. Take the motor mounts off old motor.
0, Put the motor mounts onto new motor.
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INSTRUCTIONS
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C-146
HELP-LINE
800-473-7373
Fan Motor (Cont.)
10. Replace the fan motor.
11.
12.
13.
14.
15.
16.
a. Insert the shaft into shaft collar. Put the fan wheel onto
shaft from inside oven.
b. Reattach the motor mounts to the oven body, making
sure grommets are in place.
c. Reattach the motor lead wires to the terminal strip.
Replace the oven bottom.
Turn the oven right side up.
Adjust the fan wheel for 3/16 inch clearance between the
wheel and the inlet ring.
Tighten the set screws on the fan wheel.
Check that the set screws hit the flats machined into the
motor shaft.
Replace the floor plate.
HELP-LINE
800-473-7373
Page 33
INSTRUCTION
Despatch LAD Series Instruction Manual
C-146
Page 34
APPENDIX | |
Despatch LAD Series Instruction Manual - HELP-LINE
800-473-7373
C-146
APPENDIX
Special Instructions
The Protocol™ has been preset and tested at the factory for
normal operating conditions. In most applications, it will not be
necessary to alter oven settings. This section contains additional
information and reference for special operating conditions.
Control Instrument
Tune Mode
Various functions of the control instrument are set by parameters
in the tune mode. To access the tune mode, it is necessary to
enter the proper code.
1. Press Tune key. The display reads TUNE.
2. Press y key. CODE *** will be displayed.
3. Enter + - - + - +. PID TUNE will be displayed.
The PID tuning parameters may be entered. The units are listed
below.
P = degrees
[ = seconds/repeat
D = degrees/second
HELP-LINE
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Page 35
APPENDIX
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C-146
Tuning Outline
Table 1
TUNE Selects tune mode.
CODE **+ Enter + - - + - +
PID TUNE Enter tuning parameters.
P-1 Proportional band in degrees (+ or - keys).
I-1 Reset in seconds/repeat (+ or - keys).
D-1 Rate in degrees/second (+ or - keys).
DEG - Select °C or °F (+ or - keys).
SPL - Setpoint limit, set to maximum temperature of oven (+ or - keys).
CZO - Calibration zero offset -99.9 t0 99.9 (+ or - keys).
DIS Time set in MMSS (minutes/seconds) or HHMM (hours/minutes).
BEEP Select beep on or off (+ or - keys).
PF-RECVR Power failure recovery mode. Use + or - keys to select from STOR RESUME or HOLD.
STOP Program terminates. Must restart from the beginning of the program.
RESUME When power is restored, program resumes at the point where power failure occurred.
HOLD Program waits for the operator. The operator has a choice of terminating or resuming the
program.
DIG COMM Digital communications option. Disregard unless Protocol™ is supplied with optional digital communica-
tions interface. For proper setting, refer to the Protocol“ software manual or the Digital Communication
User Guide. Select from NO COMM, CPIF or ASCII (+ or - keys). Select from RS232C or RS422A
(+ or - keys). Select address (ADDR) from 1 to 999 (+ or - keys).
RECONFIG For saving changes to DIG COMM options in memory.
PROF CLR Entering code clears all profiles to default values.
VARS CLR Entering code clears the SRAM in Protocol™. All parameters must be reset. Should be done in
EXTREME circumstances only. Recalibration is essential.
CODE *E* For factory installed modifications. Do not change the code setting
Experience and experimentation with tuning parameters will
guide the user in determining the proper settings when normal
conditions are not present.
Page 36
APPENDIX
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C-146
800-473-7373
HELP-LINE
Tuning Worksheet
In most applications it is not necessary to alter tuning parameters.
To enter the tune mode, press Tune. TUNE will be displayed.
Press Y and enter + - - + - +. Using the v key and the + or -
keys, enter the desired settings. Press the Home key when
finished.
Display Setting — Factory Setting — Units
P-1 5 degrees
L1 30 seconds/repeat
D-1 0 degrees/second
DEG - C °F (°C)
SPL - 343 °F (°C)
CO - 1 varies % degrees - calibrated to
center chamber at
300°C
DIS - HHMM minutes/seconds
(hours/minutes)
BEEP _ —— On off (on)
Notes:
1. The alternate is listed in ().
2. See Table 10, Tuning Outline, for further information
regarding display codes.
3, Tuning parameters may change from those set at the
factory. Load mass, fresh air and exhaust damper settings
will affect tuning parameters. Some experimentation is
required to determine optimum settings.
Reset times greater than 35 seconds/repeat are not
recommended.
HELP-LINE
800-473-7373
Page 37
APPENDIX
Despatch LAD Series Instruction Manual
C-146
Calibration Mode
Protocol™ has been tested and calibrated at the factory. Under
normal operating conditions recalibration should not be
necessary. However, if the instrument does not comply with
known standards recalibration may be necessary.
Calibration Instructions
We recommend using a certified analog thermocouple
simulator/calibration source with less than = 1°F noise. We have
experienced signal stability problems with some micro-processor
based thermocouple simulator/calibrators which induce an error
during the calibration procedure. This error generally results in a
non-linear shift in the controller's indicated temperature.
1. Disconnect AC power to the oven.
2. Remove Protocol"“ controller to expose thermocouple
input terminals.
3. Disconnect control and Hi-Limit thermocouples from
controller thermocouple input terminals (Control T/C, and
Hi-Limit T/C).
SENS HIL
OSO
TF 6 - + ©
Figure 6 shows the top view of the J type thermocouple inputs on
Protocol ™.
4. Mark thermocouple leads if not labeled.
5, Connect a 6 foot piece of type ] thermocouple lead wire to
each of the Control T/C and Hi-Limit T/C terminals.
Page 38
APPENDIX
Despatch LAD Series Instruction Manual HELP-LINE
C-146 | 800-473-7373
Calibration Instructions (Cont.)
6. Twist together or jumper the lead wire end not connected
to the Control T/C and Hi-Limit T/C terminals. This
creates a junction and prevents a control sensor error [S-
T/C ERR] and Hi-Limit sensor error [H-T/C ERR]
caused by an open thermocouple.
7. Loosely fasten the Protocol™ controller to the oven.
8. Re-connect AC power to the oven.
9. Press the Power on pushbutton to energize oven,
10. Press the Tune key. The display reads [TUNE |.
11. Use the y and a keys to scroll through the tune mode
configuration. The controller must be configured to operate
in °F (Fahrenheit) and CZO should be set to zero (0.0).
a. Record initial tune mode parameters prior to making any
changes.
b. Press the y key. The display reads [CODE ***].
c. Press the following key sequence: +, -, -, +, -, +.
The display reads [PID TUNE]. Protocol™ is in the
tune mode.
Page 39
APPENDIX
HELP-LINE Despatch LAD Series Instruction Manual
800-473-7373 C-146
Calibration Instructions (Cont.)
d. Use the following table to change the tune mode
parameters.
Table 11 Tune Mode Parameter Calibration
) =
32°F to 932°F
v key |L1 ### 30 + or - keys 0 to 999 seconds/repeat
vkey |D-1 ### 0 + or - keys 0 to 999 degrees/second
y key |DEG - C C + key for C or - key for E
v key |SPL ### |maximum + or - keys OC to 500°C
designed operating 32°F to 932°F
temperature?
v key |{CZO##.# can vary + or - keys to change 99.9 t0 99.9 degrees
parameter to 0.0
v key |DIS HHMM + key for HHMM (hours
HHMM and minutes) or the - key
for MMSS (minutes and
seconds).
v key |BEEP ON ON + key for ON or the - key
for OFE
1 204°C/400°E 260°C/500°E 343°C/650° F
e. Press the Manual key. The display reads
[MANUAL |].
f Allow the controller a thirty (30) minute warm up time
before proceeding to the step #13 - CAL MODE.
12. Press the Cal key. The display reads [CAL--MODE].
13. Press the v key. The display reads [CODE ***].
Page 40
APPENDIX
Despatch LAD Series Instruction Manual HELP-LINE
C-146 800-473-7373
Calibration Instructions (Cont.)
14. Press the following key sequence: +, -, -, +, -, +.
The display reads [HCAL ~~ ###].
15. To calibrate the control, press the y key. The display reads
— ISCAL ###1].
a.
Connect the piece of type J thermocouple lead wire to
the Control T/C terminals, to a thermocouple simulator.
Set the simulator to output a type J thermocouple signal.
Twist together or jumper the piece of type J
thermocouple lead wire, wired to the Hi-Limit T/C
terminals. This creates a junction and prevents a Hi-
Limit sensor error [H-T/C ERR] caused by an open
thermocouple. Press the Reset key to clear a Hi-Limit
sensor error [H-T/C ERR] caused by an open
thermocouple.
Adjust the simulator to supply a 250* F signal.
Press and hold the - key for approximately three (3)
seconds until display indicates 250. If display indicates
932, continue to step £ However, you should verify that
the display indicates 250 on step h.
Adjust the simulator to supply a 450°F signal.
Press and hold the + key for approximately three (3)
seconds until display indicates 450.
. Repeat steps d through g.
HELP-LINE
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Page 41
APPENDIX
Despatch LAD Series Instruction Manual
C-146
Calibration Instructions (Cont.)
16. To calibrate the Hi-Limit control, press the 4 key. The
display reads [HCAL ###].
а.
Connect the piece of type J thermocouple lead wire,
wired to the Hi-Limit T/C terminals, to a thermocouple
simulator.
The simulator should be set to output a type J
thermocouple signal.
Twist together or jumper the piece of type ]
thermocouple lead wire to the Control T/C terminals.
This creates a junction and prevents a control sensor
error [S-T/C ERR] caused by an open thermocouple.
Press the Reset key to clear a control sensor error [S-
T/C ERR] caused by an open thermocouple.
Adjust the simulator to supply a 250°F signal.
Press and hold the - key for approximately three (3)
seconds until display indicates 250. If display indicates
932, continue to step f. However, you should verify that
the display indicates 250 on step h.
Adjust the simulator to supply a 450°F signal.
Press and hold the + key for approximately three (3)
seconds until display indicates 450.
. Repeat steps d through g.
Press the Manual key. The display reads
[MANUAL].
17. Press the Power on pushbutton to de-energize oven.
18. Disconnect AC power to the oven.
19. Remove Protocol™ controller to expose thermocouple
inputs terminals.
Page 42
APPENDIX
Despatch LAD Series Instruction Manual
C-146
HELP-LINE
800-473-7373
Calibration Instructions (Cont.)
20.
21.
22.
23.
24.
25.
26.
27.
Disconnect the two pieces of type J thermocouple lead wite
connected to the Control T/C and Hi-limit T/C terminals.
Re-connect control and Hi-Limit thermocouples to the
controller thermocouple terminals (Control T/C, and
Hi-limit T/C).
Re-install the Protocol™ controller onto the oven.
Re-connect AC power to the oven.
Press the Power on pushbutton to energize oven.
Press the Tune key. The display reads [TUNE |.
Reset any tune mode parameters that were changed in step
11 to perform calibration (examples: DEG = F and CZ0 =
0.0).
When changes have been completed, press the Manual
key. The display reads [MANUAL |].
The calibration procedure is complete.
HELP-LINE
800-473-7373
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Diagnostics Mode
The diagnostics mode is provided to give certain relative
information about Protocol™. The following gives an outline of
the diagnostics mode.
Table 12 Diagnostics Mode Outline
DIAGNOSE | Select Diagnostics mode.
SSR Protocol™ SSR output level
EVENTS Events 1-3 follow
E-1 Event 1 output
E-2 Event 2 output
E-3 Event 3 output
SENS T/C Control thermocouple display follows
GOOD Control thermocouple test and input reading
HL - T/C Hi-Limit thermocouple display follows
GOOD Hi-Limit thermocouple test and input reading
PWR % output
SEN AD conversion code for control thermocouple
HIL AD conversion code for Hi-Limit thermocouple
Items that can be adjusted by the user include SSR (ON or
OFF), Events E-1, E-2 and E-3 (ON or OFF) and PWR. The
SSR and PWR items can be used to test the solid state relay for
proper operation. The SSR item allows the SSR to output 100%
(ON) or 0% (OFF). The PWR item allows for adjustable output
from 0% to 100%. To implement, adjust the PWR level with the
+/- keys and turn on the heater relay.
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HELP-LINE
800-473-7373
Power Failure
In the event that the power supplied to Protocol™ is insufficient
at any point during a running mode, the display will read PWR-
FAIL. In the tune mode the user can choose the Power Fail
Recovery mode from Stop, Resume and Hold. To restart after a
power failure in the hold mode, press the Start key to resume
oven operation. Otherwise, press the Reset key to clear the
PWR-FAIL display. Do not shut off the power during a running
mode. This creates an error condition and PWR-FAIL will be
displayed the next time Protocol™ is powered up. Instead, press
the Stop key and the Heater Off key. This will power off
Protocol" without creating an error condition.
HELP-LINE
800-473-7373
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Programming Examples and Outline
The following examples show a step by step procedure for
programming Protocol" in the Manual, Timer and Program
modes. Example 1 covers the Manual mode and example 2
covers the Timer mode. A detailed outline covers the Program
mode with a programming worksheet and examples 3-5 following
the outline.
Example 1 - Manual Mode
Control the process at 250°E
Table 13 Manual Mode Example
Manual MANUAL | Select Manual mode
v Hi-Limit Enter the high limit temperature
v | HL 200 High limit temperature currently set at 200°F
+ — |HL 275 Increase high limit temperature to 275°F
v SETPOINT | Enter the setpoint
v 180 75 Setpoint at 180°F actual oven temperature at 75°F
+ 250 75 Increase setpoint to 250°F
v READY Protocol™ is ready to run Manual mode
Heater On | READY Heater relay initiated, heater ready for power
Start 250 75 Setpoint = 250°F, actual oven temperature = 75°F
Stop READY Stop Manual mode
Heater Off | READY Heater relay LED is off, heater secured off
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Example 2 - Timer Mode
Control the process at 200°C for three hours and 15 minutes
with the timer beginning at 195°C. Protocol™ will stop
automatically when run in Timer mode.
Table 14 Timer Mode Example
800-473-1373
Timer TIMER Select timer mode
y Hi-Limit Enter the high limit temperature
v HL 225 Hi-Limit currently set at 225°C
- HL 215 Decrease high limit to 215°C
y SETPOINT | Enter the setpoint
y 210 25 Setpoint at 210°C, actual oven temperature at 25°C
200 25 Decrease setpoint to 200°C
v TIMEO010 Timer currently set for ten minutes
+ TIMEO315 Increase timer to three hours and 15 minutes
v TEMP NO Timer currently set to begin timing at ambient
+ TEMP YES Timer set to begin timing at the following temperature
v TEMP 79 Timer currently set to begin timing at 79°C
+ TEMP 195 Timer set to begin timing at 195°C
v READY Protocol™ is ready to run Timer mode
Heater On | READY Heater relay LED on, heater ready for power
Start 200 25 Setpoint = 200°C, actual oven temperature = 25°C
Stop READY Stop Timer mode
Heater Off | READY Heater relay LED is off, heater secured off
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Program Mode
PROGRAM Select Program mode.
Hi-Limit Hi-Limit for Program mode
HL Enter high limit temperature (+ or - keys).
PROFILES Enter profile number (1-8).
PRO- |
SEG- Segment number of profile (1-6)
RAMP Ramp time entered -
EVENTS Event status for ramp time
E-1 Event 1 status (ON or OFF
E-2 Event 2 status (ON or OF
E-3 Event 3 status (ON or OF
TEMP Ramp ending temperature
SOAK Soak period of ramp ending temperature
EVENTS Event status for soak period
E-1 Event 1 status (ON or OFF
E-2 Event 2 status (ON or OFF
E-3 Event 3 status (ON or OF
SOAK-DEV Soak-Deviation limit for profile (Also assured soak limit)
+/- Enter soak-deviation limit.
GOTO Enter profile to GOTO
End = Move to REPEAT TIMES command
1 = GOTO profile 1
2 = GOTO profile 2
8 = GOTO profile 8
REPEAT Enter number of recursions (1-99)
TIMES 1 = Execute profile 1 times
2 = Execute profile 2 times
99 = Execute profile 99 times
HOLD Hold at last setpoint?
YES Hold at last setpoint indefinitely.
Holds event outputs at last value.
NO No hold at last setpoint.
Event outputs turn OFE
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HELP-LINE
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Program Mode (Cont.)
Notes on the Program mode.
The profile number is manually entered using the + or -
keys.
Six segments exist for each profile.
If the ramp time and soak time for any one segment is zero,
Protocol ™ ignores the remaining segments.
The REPEAT TIMES command is the number of times to
execute the profile being programmed.
The HOLD command is contingent on the final segment of
the last profile to be run only.
A soak time will not begin until the actual temperature is
within the soak-deviation limit. (Assured soak limit).
Make sure the proper starting profile number is displayed in
the PRO- prompt before executing the profile to be run.
While a program is being executed, pressing the Reset key will
display the profile number, segment number and the number of
loops (REPEAT TIMES) remaining. Pressing the Start key will
display the appropriate ramp or soak time remaining (IR.)
If Protocol ™ is in a HOLD condition, pressing the Reset key
will display that the control is in segment 7 (HOLD.
HELP-LINE
800-473-7373
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| APPENDIX
Despatch LAD Series Instruction Manual
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Program Worksheet
The program worksheet serves as a guide to the input parameters
for the program mode.
Temperature (°C)
0 1 2 3 4 5 6
Time (minutes)
Figure 7 illustrates a sample profile.
Display Setting(s)
HL
PRO-
SEG- 1 2 3 4 5 6
RAMP
E-1
E-2
E-3
TEMP
SOAK
E-1
E-2
E-3
SOAK-DEV
GOTO
REPEAT TIMES
HOLD
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HELP-LINE
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Example 3 - Program Mode
130 I
O Hold
2 110 -
E 100
=
E 9-
---
80 -
10 20 30 40 50 60
Time (minutes)
Figure 8 illustrates an example temperature profile.
Follow the characteristic curve listed below.
Display Setting(s)
HL 150
PRO- 1
SEG- 1 2 3 4
RAMP 0020 0010 0010 0000
E-1 |
E-2
E-3
TEMP 100 130 120 120
SOAK 0010 0010 0001 0000
E-1
E-2
E-3
SOAK-DEV 7
GOTO End
REPEAT TIMES 1
HOLD Yes
HELP-LINE
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Example 4 - Program Mode
Autostart the oven after two hours and follow the characteristic
curve below.
Cool time to cool oven to
below 212 °F before shutdown
250 -
12
Oo
O
Temperature (FF)
с
©
|
100
50
0 | | — |
O 1 2 3 4 5 6 7 8 9 10 11
Time (minutes)
Figure 9 illustrates an example temperature profile.
Display Setting(s)
HL 2900
PRO- 1
SEG- 1 2 3 4 5 6
RAMP 0001 0100 0030 0100 0100 0030
E-1 OFF ON ON ON ON ON
E-2 |
E-3
TEMP 10 130 160 130 220 100
SOAK 0200 0030 0100 0100 0200 0000
E-1 OFF ON ON ON ON OFF
E-2 -
E-3
SOAK-DEV 5
GOTO End
REPEAT TIMES 1
HOLD NO _
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HELP-LINE
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Example 5 - Program Mode
Complete characteristic curve five times.
100
90 -
80 -
70 +
60 -
50
Temperature CC)
0 1 2 3 4
Time (hours)
Figure 10 illustrates an example temperature profile.
Display Setting (s)
HL 115
PRO- 1
SEG- 1 2 3 4 5 6
RAMP 0100 0200 0000 |
E-1
E-2
E-3
TEMP 100 50 50
SOAK 0100 0001 0000
E-1
E-2
E-3
SOAK-DEV 10
GOTO End
REPEAT TIMES 5 _
HOLD NO
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HELP-LINE Despatch LAD Series Instruction Manual
800-473-7373 C-146
Troubleshooting
Equipment which operates for long periods of time may develop
problems. Below are possible problems and suggested solutions.
If you have a problem not listed and do not know what to do,
contact Despatch Industries at our toll free Help Line
800-473-7373.
Difficulty Probable Cause Suggested Remedy
Failure to heat No power Check power source and/or oven and wall fuses.
Broken or frayed cord Replace with new cord.
Burned out heater Replace heater (see warranty.)
Protocol™ malfunction Replace controller.
Loose wire connections Disconnect power and check connections behind
control panel.
Slow heat up Improperly loaded Reduce load or redistribute load in chamber.
Low line voltage Supply sufficient power and proper
connections. Check for circuit overload.
Heating element(s) are Replace burned out element (see
burned out warranty statement, back page.)
240 volt oven is connected Raise line voltage to a 240 volt line.
to a 208V line
Fan motor failure Replace fan motor,
Frequent heater Harmful fumes generated by Increase vent opening or discontinue process.
element out load
Spillage or splattering of Disconnect power and clean oven
material on heater elements chamber and elements.
Overheating oven Check the Hi-Limit.
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HELP-LINE
800-473-7373
Troubleshooting (Cont.)
Difficulty Probable Cause Suggested Remedy
Erratic temp. Protocol ™ malfunction — Replace Protocol".
Inaccurate temp.
Improper tuning parameters Check tuning parameters.
Protocol” miscalibration Recalibrate Protocol“ (see section on Calibration
mode.)
Hi-Limit setting Hi-Limit should be 10-25°C higher than setpoint.
Improper offset Check calibration zero offset.
Excess surface Door seal Replace door seal.
or door temp. deterioration
— Improper airflow Fan motor failure Replace fan motor.
Unbalanced fan wheel Replace fan wheel.
Excessive Dirty fan wheel Clean fan.
vibration
Unbalanced fan wheel Replace fan wheel.
Oven will not Hi-Limit set too low Set the Hi-Limit higher.
control at setpoint
Protocol ™ malfunction Replace control.
SSR malfunction Replace SSR and/or check control
output voltage.
Air friction of Open exhaust air vent. Unit will
recirculation fan not control below minimum operating
temperature with vent closed.
Heater doesnot ~~ Protocol™ malfunction Replace Protocol“.
shutdown until
temp. reaches the
Hi-Limit setting SSR malfunction Replace SSR.
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Accessories
The ovens have options that can easily be field installed.
Table 16 Accessories
The round chart recorder follows the temperature changes
and records them for permanent record.
Door switch
Disables heater when the door is opened.
Extra shelves
Stands
This support frame includes one open shelf.
Base cabinets
These steel, 22 inch high cabinets are painted to match the
ovens. The cabinets store supplies and hold workloads. A
magnetic latch secures the door. Standard Despatch shelves
fit in the cabinets. Shelves for base cabinets must be ordered
separately.
Stacking kit
Allows ovens to be stacked to save space. Kit includes angles
mounted on top of the lower oven to stabilize the upper oven.
(LAD 1-42 only) -
The above items can all be field installed. For further information
on these items or other available options, please contact your
Despatch representative.
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Despatch LAD Series Instruction Manual
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HELP-LINE
800-473-7373
Warranty
For years Despatch has delivered an exceptional product backed
by a strong sense of responsibility and drive for long term
customer satisfaction. These business principles enable us to offer
the exclusive and comprehensive "Classic™ Four Plus One
Service Warranty Program".
Despatch Classic" Service Warranty Program
The basis of this outstanding, exclusive service program is a four-
year replacement warranty covering defects in workmanship or
material on all Despatch manufactured components and
assemblies. Add to this a comprehensive 1 year parts warranty on
the entire unit and you have one of the strongest warranties in
the industry.
Immediate Service Response
The key to the Classic" Service Program is response. A toll free
Help-Line connects you to our Customer Service response center
giving you immediate access to specialized assistance. Our
customer service Product Service Technicians have over 200
years experience and access to detail design and manufacturing
documentation specific to your Despatch unit. This exacting
level of service is a benefit only Despatch can provide and means
that you can expect speedy, accurate and the most cost effective
response. |
Field Service Network
A growing network of Service Professionals are available to
support your Despatch equipment. From routine calibration and
preventive maintenance to emergency breakdown response, our
service network is positioned to reach 90 percent of our installed
base within four hours. This is service you can depend on.
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Best Service Protection in the Industry!
Classic™ 4 + 1 Service Program
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6
Four Year (parts replacement) Warranty 5th
YEAR
**
One Year
+ = + +
Upgrades
+
Stand Alone
Service
Agreements
= Years 1 through 4 Years 5 and Beyond
Figure 11 illustrates the Classic “4 Plus 1 Service Program
** Receive 5th year parts replacement warranty free with
purchase of PM+ or Total Service Agreement within the
first two years. |
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Despatch LAD Series Instruction Manual HELP-LINE
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Classic™ Series Warranty
Parts and Material
Despatch warrants all parts and assemblies manufactured by
Despatch for the Classic™ Series oven to be free from defects in
material and workmanship for a period of four (4) years from the
date of shipment or start-up, by Authorized Despatch Service
Representative, whichever is later.
Despatch further warrants all parts and assemblies to be free from
defects in material and workmanship for a period of one (1) year -
from date of shipment or start-up, by Authorized Despatch
Service Representative, whichever is later.
Despatch will repair or replace, at our option, £o.b. Despatch's
factory, parts covered by this warranty. Despatch is not
responsible for parts defects resulting from misuse, abuse, acts of
nature or utility performance not to Despatch specification
including electrical, environmental and fresh air/exhaust
provisions.
Labor and Expenses
Despatch Classic™ Series warranty cover parts replacement or
repair. Labor and other expenses related to the removal and
replacement of such parts are the owners responsibility as is any
necessary reprogramming, calibration and certification.
Exclusions/Limitations of Liability
The foregoing warranty shall be deemed valid and binding upon
Seller if and only if Purchaser loads, operates and maintains the
equipment supplied hereunder in accordance with the instruction
manual provided upon delivery of the equipment. Seller does not
guarantee the process of manufacture by Purchaser or the quality
of product to be produced by subject equipment. This warranty
does not cover expenses to diagnose, repair or replace
components or associated failures.
HELP-LINE
800-473-7373
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Exclusions/Limitations of Liability (Cont.)
Parts failures caused by improper operation, abuse, misuse, acts of
nature, and nonconforming utilities and environments are not
covered by this warranty.
Despatch shall not in any event be liable for indirect, special,
consequential or liquidated damages or penalties, including loss of
‘revenue, profits or business opportunities resulting from
interruption of product production. Despatch shall further be
held blameless for any damages or expenses resulting from delays
in our attempts to diagnose and repair the equipment,
unavailability of spare parts or inaccessibility of the equipment.
Specifically excluded from this warranty is responsibility for
internal and external corrosion damage to the equipment.
Emergency Service
In an emergency situation, Customer agrees to:
1. Immediately shut off fuel or energy supply (gas and
electricity). |
2. Call 911 for emergency assistance if needed.
3. Call Despatch Service Help-Line at 800-473-7373.
Non-Compliance
Despatch reserves the right to suspend and withhold service as
provided under this Warranty in the event of non-compliance by
the Customer to any terms and conditions of this Warranty.
Further, Despatch is held harmless for any loss of production,
incurred expenses, or other inconveniences due to suspension of
service under this non-compliance provision.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL
OTHER EXPRESS AND IMPLIED WARRANTIES WHATSOEVER, AND
SPECIFICALLY THERE ARE NO IMPLIED WARRANTIES OF
MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE.
SEE ATTACHED DESCRIPTION OF DESPATCH CUSTOMER SERVICE
PROCEDURES AND RELATED CUSTOMER RESPONSIBILITIES WHICH
ARE INTEGRAL TO THIS WARRANTY.
THE FOREGOING WARRANTY IS NOT TRANSFERRABLE IN
SITUATIONS WHERE EQUIPMENT OWNERSHIP IS TRANSFERRED TO
ANOTHER PARTY.
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HELP-LINE
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Despatch Customer Service
Procedures and Customer Responsibilities
To provide the most effective service to our customers under this
warranty, all requests for repairs are to be initiated by the
Customer by telephone to the Despatch Service Help Line, 800-
473-7373. The Standard Period of Maintenance (SPM) is defined
as 8 a.m. to 5 p.m. local time, excluding weekends and Despatch
Holidays. Calls placed within the SPM will be handled as follows.
Help Line calls connect the customer with the Despatch
Response Center. The Response Center will record all pertinent
information, including SERIAL and MODEL NUMBER of the
unit(s), the urgency and nature of the problem, and the name and
phone number of the caller or other contact. This information
will be passed to the first available service support technician who —
will research the units serial file so as to be familiar with customer
unit when he calls the customer back. Despatch service
technicians will make every effort to call back within four (4)
working hours, or less, from receipt of the initial call. Despatch
will advise the Customer on suggested steps and/or tests to either
resolve the problem or help to confirm the diagnosis of th
problem.
Customer Agrees to cooperate in performing such tests and
attempting to resolve the problem as quickly as possible.
Customer also agrees to replace minor parts such as fuses, latches,
etc. as instructed by Despatch Service Technicians. This
approach has Despatch and the Customer cooperating to effect
the most expedient and cost effective repair and minimize down
time. If in Despatch's sole judgement, the equipment cannot be
"repaired in this manner, an on-site visit by a Despatch authorized
service representative may be scheduled to repair the equipment.
Customer agrees that, when requested and authorized, such
charges will be paid by the Customer within 30 days from receipt
of invoice.
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Attachment A - Sustained Service Support
At Despatch long term customer satisfaction means more than
responding quickly and effectively to our customers service
requirements, It means offering comprehensive customer support
well beyond the scope of our initial contractual commitment.
Despatch's Service Products Division offers a Total Service
Agreement package or a Preventive Maintenance Plus agreement
(PM +). These service products are unique in the industry and
offer the following benefits to our customer:
e Priority response for minimum production interruption.
e Preventive maintenance for longer product life.
e Discount on parts and services where applicable.
+ Single payment for reduced billing expense.
+ Elimination of need for a separate purchase order for each
service requested.
Because these extra service options are aimed at extending our
new equipment productivity, we will also extend the Despatch
four year manufactured parts warranty for another 12 months.
This bonus warranty is automatically yours when you purchase a
service agreement from Despatch within the first 12 months after
shipment of the equipment. |
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HELP-LINE
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