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Thermo Neslab RTE 140 Instruction And Operation Manual

Bath/circulator with microprocessor controller
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Enlarged version
RTE 140 Bath/Circulator
with Microprocessor Controller
Thermo NESLAB Manual P/N 000018
Rev. 09/20/00
Instruction and Operation Manual

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Summary of Contents for Thermo Neslab RTE 140

  • Page 1 RTE 140 Bath/Circulator with Microprocessor Controller Thermo NESLAB Manual P/N 000018 Rev. 09/20/00 Instruction and Operation Manual...

  • Page 2: Table Of Contents

    R R R R R TE-140 Refrig TE-140 Refrig TE-140 Refrigerated Bath/Cir TE-140 Refrig erated Bath/Cir erated Bath/Cir erated Bath/Circulator culator culator culator TE-140 Refrig erated Bath/Cir culator Instruction and Operation Man Instruction and Operation Man Instruction and Operation Man Instruction and Operation Man Instruction and Operation Manual T T T T T ab...

  • Page 3: Preface

    After-sale Support After-sale Support Thermo NESLAB is committed to customer service both during and after the sale. If you have questions concerning the operation of your unit, contact our Sales Department. If your unit fails to operate properly, or if you have questions concerning spare parts or Service Contracts, contact our Cus- tomer Service Department.

  • Page 4: Warnings

    Section I Saf Section I Saf Section I Saf Section I Saf Section I Safety Warnings Warnings Warnings Warnings Warnings Make sure you read and understand all instructions and safety precautions listed in this manual before installing or operating your unit. If you have any questions concerning the operation of your unit or the information in this manual, contact our Sales Department.

  • Page 5: Description

    Description Description Description Description The RTE 140 Refrigerated Bath/Circulators are designed to provide tempera- ture control for applications requiring a fluid work area or pumping to an external system. Units consists of a non-CFC air-cooled refrigeration system, circulation pump, seamless stainless steel bath, work area cover, and a microprocessor temperature controller.

  • Page 6: Site

    Section III Installation Section III Installation Section III Installation Section III Installation Section III Installation Site Site Site Site Site The indentations on the sides of the unit are designed to function as handles. Lift the unit by the handles and locate it on a sturdy table or bench top. Ambient temperatures should be inside the range of +50°F to +104°F (+10°C to +40°C).

  • Page 7: Plumbing Requirements

    If substantial lengths of tubing are necessary, insulation may be required to prevent loss of cooling capacity. Tubing and insulation are available from Thermo NESLAB. Contact our Sales Department for more information (see Preface, After-sale Support).
  • Page 8 Circulating to an open container Circulating to an open container Circulating to an open container Circulating to an open container Circulating to an open container Levelling Device Outlet Inlet Bath (Rear View) Open Container A stainless steel leveling device is available to aid circulation to an open vessel.

  • Page 9: Fluids

    Drain Drain Drain Drain Drain Ensure the temperature of the bath fluid is safe before draining the unit. Ensure the temperature of the bath fluid is safe before draining the unit. Ensure the temperature of the bath fluid is safe before draining the unit. Ensure the temperature of the bath fluid is safe before draining the unit.

  • Page 10: Controllers

    Controller Mounting Controller Mounting Controller Mounting The controller can be removed from the bath and placed in a remote loca- tion. Extension cables are available from Thermo NESLAB. Contact our Sales Department for more information. Controller Connection Controller Connection Controller Connection...
  • Page 11 LED Indicators LED Indicators LED Indicators LED Indicators LED Indicators The following table explains the controller LED indicators. The LEDs can be on, off or flashing. STATUS INDICATION SENSOR All controller functions are operating from the unit's internal probe. All controller functions are operating from remote sensor input.

  • Page 12: Start Up

    Start Up Start Up Start Up Start Up Start Up Before starting the unit, check all electrical and plumbing connections and make sure the work area has been properly filled with bath fluid. NOTE: NOTE: NOTE: The fluid level should be between the two lateral slots at the rear of NOTE: NOTE: the reservoir.

  • Page 13: Temperature Adjustment

    Temperature Temperature Temperature Temperature Temperature Adjustment Adjustment Adjustment Adjustment Adjustment To display the temperature setpoint, press SETPT. The Main display will flash the current setpoint. Press ENTER to return the display to the bath's fluid temperature. To adjust the setpoint press SETPT and then press CLEAR, the display will go blank.

  • Page 14: Alarm/External Functions

    The controller has the capability to enable and/or monitor a remote bath's temperature sensor. (Remote sensor probes of various sizes are available from Thermo NESLAB. Contact our Sales Department for more information.) Pressing SENSOR, when a remote sensor is properly connected to the controller's 9-pin SENSOR connector, will display the remote sensor's tem- perature on the Main display.

  • Page 15: Program Functions

    Program Functions Program Functions Program Functions Program Functions Program Functions Programming Programming Programming Programming Programming The microprocessor controller can store up to 8 temperature programs, each one having up to 15 program steps (16 setpoints). You can select, enter or run one program at a time.
  • Page 16 l SENSOR l HT l PROG l HEAT 88.88 l RS232 l LT l HOLD l COOL l MUTE l FAULT EXTERNAL ALARM PROGRAM SENSOR SENSOR SENSOR SENSOR SENSOR HT/LT HT/LT HT/LT HT/LT HT/LT HOLD HOLD HOLD HOLD HOLD SETPT SETPT SETPT SETPT...
  • Page 17 Assured Soak Assured Soak Assured Soak Assured Soak Assured Soak This option is used when you need to ensure the bath temperature will reach the next setpoint (regardless of time) before moving onto the next period. This option is controlled by a DIP switch on the rear of the controller. Turn DIP switch number seven (7) to the ON position to enable this feature.

  • Page 18: Program Control

    Program Control Program Control Program Control Program Control Program Control The following tables show how to use the keypad and Main display to program the controller. If an error message appears see page 20. Use Table 1 to select one of the eight programs to be the current program for either entering or running.
  • Page 19 Use Table 4 to scroll through a two-setpoint stored program. You would use this procedure for scrolling any number of setpoints (up to the 16 setpoint maximum). TABLE 4 TABLE 4 TABLE 4 TABLE 4 TABLE 4 Keypad input Main Display Comments -PROG/STORE -ENTER...
  • Page 20 Use Table 9 to resume a suspended program. TABLE 9 TABLE 9 TABLE 9 TABLE 9 TABLE 9 Keypad input Main Display Comments PROG LED PROG LED -RUN/STOP Current bath PROG LED PROG LED PROG LED flashes. temperature Use Table 10 to clear a stored program. TABLE 10 TABLE 10 TABLE 10...

  • Page 21: Error Messages

    Error Messages Error Messages Error Messages Error Messages Error Messages The Main LED will indicate an error message for eight different conditions. Error1 - Program incomplete or illogical. Re-enter the program. Error2 - Period entered exceeds 6,500 minutes. Reenter a period. Error3 - Entered value exceeds allowable limits.

  • Page 22: Pid Control

    PID Control PID Control PID Control PID Control PID Control PID controllers are best suited for systems that may experience changing heat loads. Proportional control is combined with Integral and Derivative adjustments which allow the controller to automatically compensate for any changes from the setpoint.

  • Page 23: Calibration

    Calibration Calibration Calibration Calibration Calibration The microprocessor controller has three different modes of calibration: Self- Cal, Two-point, and One-point. The controller is shipped from the factory with a Two-point calibration so no additional controller calibration may be re- quired. Both the internal probe and the remote sensor input must be indepen- dently calibrated.
  • Page 24 Two-point Two-point Two-point Two-point Two-point: For high accuracy measurements the controller input can be calibrated at two points. These two points (one high, one low) should be as far apart as practical for good performance. Do not pick points that are outside the safe operating limits of the fluid Do not pick points that are outside the safe operating limits of the fluid Do not pick points that are outside the safe operating limits of the fluid Do not pick points that are outside the safe operating limits of the fluid...

  • Page 25: High Temperature/Low Liquid Level Safety

    High Temperature/ High Temperature/ High Temperature/ High Temperature/ High Temperature/ Low Liquid Low Liquid Low Liquid Low Liquid Low Liquid Level Safety Level Safety Level Safety Level Safety Level Safety To protect your application, the adjustable High Temperature/Low Liquid Level Safety (HIGH TEMP/LOW LEVEL) ensures the heater will not exceed temperatures which can cause serious damage to your unit.

  • Page 26: Maintenance

    Service Contracts Service Contracts Service Contracts Service Contracts Thermo NESLAB offers on-site Service Contracts that are designed to provide extended life and minimal down-time for your unit. For more infor- mation, contact our Service Department (see Preface, After-sale Support). Condenser...

  • Page 27: Reservoir Cleaning

    This will eliminate the entrance of light required for the growth of most common algae. Thermo NESLAB recommends the use of Chloramine-T, 1 gram per 3.5 liters. - 26 -...

  • Page 28: Checklist

    Section Section Section Section Section VI VI VI VI VI T T T T T r r r r r oub oubleshooting leshooting leshooting leshooting leshooting Checklist Checklist Checklist Checklist Checklist Unit will not start Unit will not start Unit will not start Unit will not start Unit will not start Make sure the voltage of the power source meets the specified voltage,...

  • Page 29: Service Assistance And Technical Support

    No communication between bath's microprocessor and your computer No communication between bath's microprocessor and your computer No communication between bath's microprocessor and your computer No communication between bath's microprocessor and your computer No communication between bath's microprocessor and your computer Ensure the bath's microprocessor parameters (baud rate, parity etc.) match your computer requirements.
  • Page 30 NOTE: Do not use a cable that connects to the unused pins on the bath communications port. This may cause a communication fault. Communica- tion cables are available from Thermo NESLAB. Contact our sales depart- ment for additional information. With a cable properly connected to the controller press RS232, the RS232 LED will start to flash.
  • Page 31 TABLE 1 GENERAL COMMANDS TABLE 1 GENERAL COMMANDS TABLE 1 GENERAL COMMANDS TABLE 1 GENERAL COMMANDS TABLE 1 GENERAL COMMANDS Command Echo SEi[CR] Echo: i = 1, No echo: i = 0 (control returns commands) Set Setpoint SSxxx.xx[CR] -30.00 to +150.00°C or -22.00 to +300.00°F Read Setpoint RS[CR] Read Main Probe Temperature...
  • Page 32 TABLE 4 PROGRAMMING COMMANDS TABLE 4 PROGRAMMING COMMANDS TABLE 4 PROGRAMMING COMMANDS TABLE 4 PROGRAMMING COMMANDS TABLE 4 PROGRAMMING COMMANDS Set Step Setpoint SYn,xxx.xx<[CR] n = step number Read Step Setpoint RYn[CR] Set Step Period SXn,xxx.xx[CR] n = step number Read Step Period RXn[CR] Read Number of Steps...
  • Page 33 Remote Programming Remote Programming Remote Programming Remote Programming Remote Programming The bath can be programmed and controlled by a remote computer. Enter step setpoints using the SYn command, time periods using the SXn com- mand, number of loops using the SKxxxx command and number of periods in the program using the Ssn command.
  • Page 34 Communication Communication Communication Communication Communication Command Protocol Command Protocol Command Protocol Command Protocol Command Protocol The following table lists the communication command protocol for program- ming the controller via a computer.Use the Ctrl - C key combination to clear the controller receiving buffer if an erroneous character is detected. FUNCTION FUNCTION SYNTAX...
  • Page 35 Appendix B Appendix B Appendix B Appendix B Appendix B PROGRAMMING SOFTW OGRAMMING SOFTW OGRAMMING SOFTWARE OGRAMMING SOFTW OGRAMMING SOFTW NEScom Software NEScom Software NEScom Software NEScom Software NEScom Software The NEScom Communications Software is a user friendly software that allows you to automate your temperature control process.
  • Page 36 Thermo NESLAB Repair Depot within the warranty period. The expense of return- ing the unit to the authorized Thermo NESLAB Repair Depot for warranty service will be paid for by the buyer. Thermo NESLAB’s responsibility in respect to warranty claims is limited to performing the required repairs or replacements, and no claim of breach of warranty shall be cause for cancellation or recision of the contract of sales of any unit.With respect to units that qualify for field service repairs, Thermo NESLAB’s...

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