LAC SERIES OVEN WITH PROTOCOL PLUS ™ INSTRUCTION MANUAL C-184 PN 143365 REVISION H 11/2007
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.
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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 unpacking, installing, operating and maintaining the Despatch oven.
Revision B: Corrected Sensor Calibration Page instruction Revision C: Added definitions and sample profile to Program Page description Revision D: Correction to Relay Outputs (optional) table Revision E: Modified per Rev C Protocol Plus software Revision F: Updated drawings. Revision G: Revised Protocol Plus times. Updated Despatch address.
TABLE OF CONTENTS INTRODUCTION .......................................................................................................................... 1 Special Features ....................................................................................................................... 1 Specifications ............................................................................................................................ 2 Dimensions ................................................................
Control Page ................................................................................................................... 32 Communication Page (optional) ...................................................................................... 33 Real Time Clock Page (optional) .................................................................................... 33 Relay Outputs Page (optional) ........................................................................................ 34 Test Page ........
INTRODUCTION This section provides an overview of the Despatch LAC Series forced air oven. The LAC Series Ovens have the most effective heat distribution and the fastest processing time of any lab oven their size. Air is discharged from the left side wall of the oven and circulates through the chamber. Special Features The sturdy construction and three inch insulation of the Despatch LAC Series ovens contribute to excellent temperature uniformity.
Specifications Dimensions LAC Model No. 1-10 1-38A 1-38B 1-67 2-12 2-18 Chamber Size in (cm) W* D H 13.75 (35) 18.75 (48) 18.75 (48) 23.75 (60) 23.75 (60) 35.25 (91) 12 (31) 18 (46) 18 (46) 20 (51) 24 (61) 24 (61) 12 (31) 19 (48) 19 (48) 24 (61) 36 (91) 36 (91) Capacity feet3 (liters) 1 (33) 3.7 (105) 3.7 (105) 6.6 (187) 12 (336) 18 (500) Overall Size in (cm) W D H 23 (58) 28 (71) 28 (71) 36 (91) 36 (91) 48 (122) 19 (48) 25 (64) 25 (64) 27 (69) 31 (79) 31 (79) 29.5 (75) 35.5 (90) 35.5 (90) 40.
Capacities LAC Model Number 1-10 1-38 A & B 1-67 2-12 2-18 Maximum Load Lbs 100 125 150 175 200 Maximum Shelf Load Lbs 50 25 25 25 25 Exhaust CFM Adjustable to 5 Adjustable to 12 Adjustable to 12 Adjustable to 30 Adjustable to 40 Recirculating Fan CFM H.P. 150 1/25 300 ¼ 300 ¼ 600 ¼x2 600 ¼x2 Approx.
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.
THEORY OF OPERATION This section details the function and operation of assemblies and subassemblies on the Despatch LAC 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.
Damper Control The oven is equipped with a manually adjustable damper mechanism. The damper control arm is located on the front panel of the oven. The damper adjustment controls the fresh air opening which, due to pressurization of the oven chamber, controls the flow of exhaust. If the damper is in the full open position, the maximum exhaust rate is achieved. If the damper is in the fully closed position, the minimum exhaust rate is achieved.
Full Open Position When the damper is in the full open position, the chamber will operate at its minimum operating temperature. Friction heat from the air recirculation system builds up in the chamber. This causes chamber temperature to rise slightly even though the heating system is not turned on. After the recirculation motor has been on for an extended period of time, the chamber will reach a thermal equilibrium temperature.
INSTRUCTIONS The INSTRUCTIONS section provides directions for unpacking, installation, operation and maintenance of the LAC Series oven. 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.
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 LAC Series Oven, complete the warranty card and mail it to Despatch within 15 days after receipt of the equipment. Set-up 1. Remove adhesive backing sheet from the rubber feet. 2. Attach rubber feet to the bottom corners of the oven. 3. Place oven on a bench top or an optional cabinet base.
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.
The two shelves are designed to be pulled out about half way without tipping for loading and unloading. 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. Pre-Startup Checklist Know the system. Read this manual carefully.
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. 1. 2. Start Fan. a. Open oven door. b. Press Power switch to the On position. You will hear the recirculating fan start. c. Shut oven door. d. Check that the control display turns on. Operate the temperature control as desired by following the control operation instructions that follow.
CONTROL The special features of the Protocol PlusTM control include: PID tuning Ramp/Soak programming of up to 64 segments Segment looping and profile linking Built-in manual reset high limit control Built-in process timer Dedicated LED display for process temperature Multi-purpose two-line LCD display with backlight Auto-tuning Security access Process temperature retransmission signal Digital inputs for remote profile control Optional relay outputs for events, alarms, or end-of-cycle signal Optional real-t
Protocol Plus Faceplate and Wiring Diagram 14
Operating Modes The Protocol Plus control has five modes of operation available: Stopped Mode: All control and relay outputs are off. Stopped Mode is integrated into each of the following four modes of operation. Manual Mode: Control operates as a single setpoint control until Stopped mode is accessed Timer Mode: Control operates as a single setpoint control until preset time period has expired. Profile Mode: Control operates as a ramp/soak profiling control until the end of the profile.
High Limit The control has an integrated high limit function which will disable the heater output when tripped. If the high limit does trip, the relay will need to be manually reset. When the high limit relay is tripped, the Hi-Limit indicator will be lit. Allow the oven to cool several degrees (or increase the high limit setpoint) and then press the Reset key. The indicator will turn off. The control will not allow the high limit setpoint to be set below the current setpoint value.
Displays The Protocol Plus control has two displays. A dedicated LED upper display shows the oven temperature. A two-line LCD lower display provides information on control status and allows changes to be made to the control settings. Key Functions The Protocol Plus control has seven keys that provide operation. Select key: Press to select mode of operation. In Setup Mode, to select profile number or relay. In Profile/Run Mode, press simultaneously with the UP key to advance a segment.
Outputs The Protocol Plus control has seven different outputs available. Heating output: The control output is a DC voltage open-collector output which is time-proportioned and designed to control a heat control device such as a solid state relay. High limit: The high limit output is a form C relay which is energized under normal operating conditions.
Relay (Continued) Use the Relay Card Optional Ay p/n 144562 to add relays to the standard controller. Each relay card contains two relays (maximum of two cards Ay’s allowed). Communication The Protocol Plus control has optional MODBUS communication available which can communicate via RS232, RS422, or RS485 to a computer. See communications option assembly p/n 141877 for board and cable assembly. Please refer to the MODBUS communications manual which comes with this option.
Instructions Start-Up These instructions are provided as a quick reference for operating the Protocol Plus control. If the Profile Mode is to be used, or the configuration of the control needs to be changed, please refer to the Setup Mode instructions before operating the control. For more detailed operating instructions refer to the Operation instructions for the mode you wish to use. Upon initial power-up the control is in Manual/Stopped Mode (unless the Autostart or Fast Start Modes are active).
Operation Manual Mode Press the Select key until Manual is displayed (note you can press the Run key at any time to activate Manual Mode). 1. Press the Menu key to display the Process Temperature Setpoint (setpt). You can change the Setpoint with the keys. Note: If the SPChange parameter on the Enable page in Setup Mode has been set to DISABLED, it must be changed to ENABLED before any changes to the process temperature and high limit setpoints can be made. 2.
Timer Mode 1. Press the Select key until Timer is displayed (note you can press the Run key at any time to activate Timer Mode). 2. Press the Menu key to display the Process Temperature Setpoint (Setpt). You can change the Setpoint with the keys. Note that if the SPChange parameter on the Enable page in Setup Mode has been set to DISABLED, it must be changed to ENABLED before any changes to the process temperature and high limit setpoints can be made. 3.
Profile Mode 1. Press the Select key until Profile is displayed. “None” may be displayed if a profile has not been selected or no profiles entered. 2. Press the 3. To start Profile Mode, press the Run key. key to display the desired profile to run. The display will change from Stop to Run and the segment time remaining, Temperature Setpoint, Profile #, along with the current segment number, will be displayed. To return to Stopped Mode, press the Stop key.
Setup Mode Configuration of the control and programming of the ramp/soak profiles must be done in the Setup Mode. To access Setup Mode, the control must first be in Stopped Mode. 1. Press the Select key until Setup is displayed. 2. Press the Page key and Security will be displayed. 3. Press the Menu key and Password will also be displayed. Use the enter the proper password. 4. Once the proper password is displayed, press the Page key twice to enter the Setup Mode.
Instructions for Setup Mode Pages Program Page Programming of the profiles is provided on the Program Page. Eight profiles are available with up to eight ramp and soak segments per profile. If the optional relay outputs are installed, they must be configured as alarms or events on the Relay Outputs Page before they can be utilized. If configured as event outputs, these relays can be used as time or temperature events.
Menu Item Display Description Ramp Time Seg 1 Pro-1 Seg-1 Ramp Time Ramp time for segment 1 of profile Event 1 Set Value* Pro-1 Seg-1 Ramp Event 1 Event 1 setting for segment 1 ramp of profile Event 2 Set Value* Pro-1 Seg-1 Ramp Event 2 Event 2 setting for segment 1 ramp of profile Event 3 Set Value* Pro-1 Seg-1 Ramp Event 3 Event 3 setting for segment 1 ramp of profile Event 4 Set Value* Pro-1 Seg-1 Ramp Event 4 Event 4 setting for segment 1 ramp of profile Soak Temp Seg 1 Pro-1 Seg 1 So
Profile # There are eight profiles available. Segment# Recipe segments 1 through 8 may be programmed, each with its own set of events, ramp and soak times, and soak temperature. Ramp Time The time required to ramp from one setpoint up to another setpoint. Values between 0 and 99:59 are allowable. In the Protocol Plus controller, the profile ramp and soak times are stored without units. Units are set as either hours and minutes (HH:MM) or minutes and seconds (MM:SS).
Sample Profile Programming Table Profile Number____1______ Profile Name__________ Ramp Segment Soak Events Temperature Time 1 2 3 4 Events Time 1 1 01h00 100 01h00 2 02h00 50 00h01 3 00h00 4 5 6 7 8 High Limit Setpoint 115 Loop From Seq No Loop To Seq No Loop Number 0 Link To Pro No Guar Soak Band 10 28 2 3 4
Auto Start Page (optional) If the optional real time clock has been installed, the Auto Start Page can be configured to automatically start Manual, Timer or Profile Mode at a specified time and day. Note that if Auto Start Enable is set to Yes in the Setup Mode, the Auto Start feature is not turned on - it is available to the operator to be activated in Stopped Mode. To configure the Auto Start feature: 1. Access the Setup Mode. 2. Press the Page key until Auto Start is displayed. 3.
Menu Item Display Description Range Enable Autostart Auto Start Enable Enable (yes) or disable (no) the Autostart function No, Yes Sunday mode Auto Start Sun Mode Set mode on Sunday to activate Off, Manual, Timer, Pro-1 to Pro-8 Sunday time Auto Start Sun Time Set time on Sunday for mode to activate 00:00 to 23:59 Monday mode Auto Start Mon Mode Set mode on Monday to activate Off, Manual, Timer, Pro-1 to Pro-8 Monday time Auto Start Mon Time Set time on Monday for mode to activate 00:
PID Page The PID Page contains parameters which control the response to the setpoint and process variable input. To access the PID Page, enter the Setup Mode (see Page 11). Press the Page key until PID is displayed. Press the Menu key. Each parameter can be changed by pressing the Menu key until the desired parameter is displayed, and then pressing the keys to change the value.
Control Page The Control Page contains various parameters which control miscellaneous functions. To access the Control Page, enter the Setup Mode. Press the Page key until Control is displayed. Press the Menu key. Each parameter can be changed by pressing the Menu key until the desired parameter is displayed, and then pressing the keys to change the value.
Communication Page (optional) The Communication Page contains parameters for the communications feature. To access the Communications Page, enter the Setup Mode (see description earlier in this manual). Press the Page key until Communication is displayed. Press the Menu key. Each parameter can be changed by pressing the Menu key until the desired parameter is displayed, and then pressing the keys to change the value.
Relay Outputs Page (optional) The Relay Outputs Page configures the four alarm/event outputs. Each output has a dedicated indicator light and can be configured as a temperature alarm, profile event, or end of cycle output. Temperature alarms can be of type process high, process low, deviation high, deviation low, or deviation band. To access the Relay Page, enter the Setup Mode (see description earlier in this manual). Press the Page key until Relay is displayed.
Test Page The Test Page contains parameters which allow manual control of the heat control and optional relay outputs and should be used only for testing the functionality of the control instrument. Do not operate the oven for processes using the Test Page. To access the Test Page, enter the Setup Mode (see description earlier in this manual). Press the Page key until Test is displayed. Press the Menu key.
Zone Calibration Page The Zone Calibration Page allows adjustment of the displayed temperature versus the actual temperature measured by the control thermocouple. This may be desirable in certain conditions where the center of the oven chamber is not the same temperature as the control thermocouple. This may occur when the oven is not allowed to soak at a constant temperature for long periods of time, or the oven is being used at high temperature.
As an example, the control is displaying 400°F with the setpoint being 400°F, but the center of the oven chamber is actually 395°F. This can occur due to oven wall losses and product loading variations. The operator may change the zone calibration so that the center of the oven is 400°F when the display reads 400°F. In this case operate the oven in manual mode with a setpoint of 400°F. Record the center of the chamber (as measured with an independent sensor).
Sensor Calibration Page The Sensor Calibration Page has parameters which can change the internal calibration of the temperature sensor input signal. There is a low and high calibration point for both the control sensor and the high limit sensor. To calibrate the instrument, allow the control to warm up for at least 30 minutes. To access the Sensor Calibration Page, enter the Setup Mode (see description earlier in this manual). Press the Page key until Control Sensor is displayed. Press the Menu key.
19. Connect a calibration instrument with a type J thermocouple output to the control sensor input. 20. Connect a voltage measurement device to the retransmit output terminals. 21. Set the calibration instrument output to the temperature value of the RetOutLo parameter from the Control Page. 22. Adjust the RetCalLo * value using the keys until the voltage measurement device reads 1VDC. 23. Press the Menu key. 24.
Enable Page The Enable Page controls access to the other Setup Pages. The setpoint minimum and maximum values, and the security passwords are also set on the Enable Page. To access the Enable Page, enter the Setup Mode using a level 2 access code (see description earlier in this manual). Press the Page key until Enable is displayed. Press the Menu key. Each parameter can be changed by pressing the Menu key until the desired parameter is displayed, and then pressing the keys to change the value.
Digital Inputs (optional) The Protocol Plus control can be run by external inputs wired to the control from an external source such as a PLC or control panel switches. The external run operation can Run, Hold or Stop profiles 1 through 7 (profile 8 can not be operated externally). Refer to the table below for the inputs required for the desired operation. NOTE: A profile must be created in the program page before trying to run a profile number.
Error Messages and Alarms The Alarm Status Hi-limit LED is flashing. This indicates a problem with the thermocouple, or the Hi-limit setpoint has been exceeded. Once the problem has corrected, press the Reset pushbutton. The Alarm Status Soak LED is flashing. This indicates that the oven temperature has not entered or dropped out of the soak band and the soak timer has stopped. The top LED Display reads OPEN. This indicates that either the Control or the Hi-limit thermocouple is disconnected or broken.
Quick Reference and Default Values Program Page Menu Item Display Default Range Ramp Time Seg 1 Pro-1 Seg-1 Ramp Time 00:00 00m00s to 99h59s Event 1 Set Value Pro-1 Seg-1 Ramp Event 1 Off Off, On Event 2 Set Value Pro-1 Seg-1 Ramp Event 2 Off Off, On Event 3 Set Value Pro-1 Seg-1 Ramp Event 3 Off Off, On Event 4 Set Value Pro-1 Seg-1 Ramp Event 4 Off Off, On Soak Temp Seg 1 Pro-1 Seg 1 Soak Temp 68°F SPLowerLim to SPUpperLim * Soak Time Seg 1 Pro-1 Seg 1 Soak Time 00:00 00m00s
Programming Table Profile Number__________ Profile Name__________ Ramp Segment Soak Events Time 1 2 3 4 Temperature 1 2 3 4 5 6 7 8 High Limit Setpoint Loop From Seq Loop To Seq Loop Number Link To Pro Guar Soak Band 44 Events Time 1 2 3 4
Autostart Menu Item Display Default Range Enable Autostart Auto Start Enable No No, Yes Sunday mode Auto Start Sun Mode Off Off, Manual, Timer, Pro-1 to Pro-8 Sunday time Auto Start Sun Time 00:00 00:00 to 23:59 Monday mode Auto Start Mon Mode Off Off, Manual, Timer, Pro-1 to Pro-8 Monday time Auto Start Mon Time 00:00 00:00 to 23:59 Tuesday mode Auto Start Tue Mode Off Off, Manual, Timer, Pro-1 to Pro-8 Tuesday time Auto Start Tue Time 00:00 00:00 to 23:59 Wednesday mode Aut
Control Menu Item Display Default Range Setting Cycle Time Control Cycle Time 1 1 to 60 seconds High limit setpoint Control Hi-Lim SP Max HiLimSP MinHiLimSP - MaxHiLimSP* High limit band Control Hi-Lim Band Off Off, 3°C to 11°C (5°F to 20°F) Power fail recovery Control PwrFRec Stop Stop, Restart, Hold, Resume Recovery time limit Control PwrFTime 00m00s 00m00s to 99m59s Powerup start enable Control EPwrStrt Dis Dis, En Powerup Start Mode Control StrtMode Off Off, Manual, Timer
Real Time Clock Menu Item Display Default Range Setting Day of the week Clock Day Mon Sun, Mon, Tue, Wed, Thu, Fri, Sat Time of day Clock HH:MM 00:00 00:00 to 23:59 Reset clock Clock UP to Reset CLK* Ready Ready, Done * if the key is not pressed, the clock values will retain their original values, the display will change to Done if the clock is reset Relay Outputs (optional) Push Select key to select relay.
Test Menu Item Display Default Range Heater output Test HeatOut Off On High limit relay Test HiLimOut Off On Relay 1 output Test Rly1 Out Off On Relay 2 output Test Rly2 Out Off On Relay 3 output Test Rly3 Out Off On Relay 4 output Test Rly4 Out Off On High Limit Sensor Test HL Temp (sensor reading) Setting Zone Cal Menu Item Display Default Range Zone 1 actual Zone Cal Zone1Act 38°C -73°C to 760°C (-100°F to 1400°F) Zone1 displayed Zone Cal Zone1Dis 38°C -73°C to
Enable Page Menu Item Display Default Range Profiles Enable Profile 1-8 Yes Yes or No Autostart Enable Auto Start No Yes or No PID Enable PID Yes Yes or No Control Enable Control No Yes or No Communication Enable Communication No Yes or No Real Time Clock Enable Clock No Yes or No Relay outputs Enable Relay 1-4 No Yes or No Test Enable Test No Yes or No Zone Calibration Enable Zone Cal No Yes or No Sensor Calibration Enable Sensor Cal No Yes or No Setpoint lower l
Technical Specifications UL, cUL listed: UL file E136675 CE compliance to: EMC Directive 89-366/EEC European Standard EN55011/1991 European Standard EN50082-2/1995 Power supply: 100 to 240 VAC +10% -15%, 50-60Hz, 30VA Maximum 12 to 24 VAC/VDC +/-10%, DC to 60Hz, 30VA Maximum Temperature: Humidity: Storage -20 to 60°C Operating 0 to 50°C 90% or less, non-condensing Sensor inputs: Type J thermocouple -73°C to 760°C (-100°F to 1400°F) Input impedance 1M ohm or greater Common mode noise rejection of 14
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.
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 temperature control. Test the control every 40 hours. Check that the heater LED is cycling on and off, indicating that the heater is working. Also check the high limit function to make sure it is working properly. To test the high limit: 1.
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.
Protocol Plus™ Instrument (Tools needed: 1/4" socket driver with #1 bit, #2 Phillips screwdriver) 1. Disconnect the power. 2. Remove the screws from the sides of the control panel and slide it forward. 3. Unplug all terminals on the rear of the control, noting the proper connections. 4. Remove the four retaining clips for the control. 5. Remove the control. 6. Insert the new control into the panel. 7. Fasten the four retaining clips. 8. Re-plug all terminals. 9. Fasten the control panel.
Fan Motor (Tools needed: Square recess driver w/#1 bit, 5/32 inch Allen wrench, one quarter (¼) inch socket set) 1. Remove the screws from the sides of the control panel and slide forward. 2. Unplug the motor harness from the circuit board and remove motor and heater ground wires from ground stud. 3. Unplug heater leads from circuit board and thermocouple leads from control. 4. Pull off fresh air damper handle from damper arm. 5. Remove screws holding fresh air damper arm assembly to control panel.
16. Replace and fasten the fan inlet cover. 17. Adjust the fan wheel for 3/16 inch clearance between the wheel and the inlet ring and tighten the set screws on the fan wheel. Check that the set screws hit the flats machined into the motor shaft. 18. Replace and fasten heater. 19. Replace fan and heater plug assembly in oven body. 20. Replace left side wall. 21. Replace and fasten floor plate. 22. Replace fresh air damper arm assembly. 23. Replace fresh air damper handle. 24.
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 Failure to heat Slow heat up Frequent heater element out Erratic temp. or inaccurate temp. Probable Cause Suggested Remedy No power Check power source and/or oven and wall fuses.
Difficulty Probable Cause Suggested Remedy Excess surface or door temp. Door seal deterioration Replace door seal. Improper airflow Fan motor failure Replace fan motor. Fan wheel seated too low on fan shaft Adjust fan wheel for 3/16" clearance between wheel and inlet ring. Unbalanced fan wheel Replace fan wheel. Dirty fan wheel Clean fan. Unbalanced fan wheel Replace fan wheel. Hi-limit set too low Set the Hi-limit higher Protocol malfunction Replace control.
DRAWINGS Excerpt from drawing 141852H1, 8-2000 LAC1-10-5 59
LAC1-10-5 Data 60
LAC1-38A-5 Excerpt from drawing 141853F1,4-2000 61
LAC1-38A-5 Data 62
LAC1-38B-5 Excerpt from drawing 141854G1, 4-2000 63
LAC1-38B-5 Data 64
LAC1-67-5 Excerpt from drawing 141855G1, 4-2000 65
LAC1-67-5 Data 66
LAC2-12-5 Excerpt from drawing 141856G1, 4-2000 67
LAC2-12-5 Data 68
LAC2-18-5 (Excerpt from drawing 141857G1, 4-2000) 69
LAC2-18-5 Data 70
APPENDIX: Temperature Scale Conversion and Optional MRC5000 Setup Temperature Scale Conversion (C/F) The Protocol Plus controller can be operated in either C or F. The default setting for the controller is C. Changing from one to the other is as follows: 1. Go into the Setup Mode on the controller. 2. Press the Select Key until Setup is displayed. 3. Press the Page key and Security will be displayed. 4. Press the Menu Key and Password will be displayed. Use the arrow keys to enter the proper password.
Optional MRC5000 Recorder Setup The temperature is retransmitted to the Recorder from the Controller. Set up the Recorder as follows: 1. Make sure that jumper JU1 is setup for the 5 VDC setting (see MRC Manual). 2. Move the Mode switch to the PROG/TEST/CAL position, and Prog will be displayed. 3. Press the down arrow key twice and Inps will be displayed. Make sure the settings are per the table below. 4. Once all the settings have been changed, move the Mode switch to the RUN position.
