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Newport LDT-5500B Series User Manual

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User's Guide
Temperature Controller
LDT-5500B Series
70019907 November 2017

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  • Page 1 User’s Guide Temperature Controller LDT-5500B Series 70019907 November 2017...

  • Page 3: Table Of Contents

      Rack Mounting ........................ 13  Power Up Sequence ....................13   USB .......................... 14   Introduction to the LDT-5500B Series Front Panel ........... 14   Adjustments ........................14  Display ..........................14  Parameters ........................15  Parameter Setup ......................16  Thermistor Sensor Cal ....................16 ...
  • Page 4 Command Timing and Completion ................. 24  Error Messages ......................24   Chapter 4 : Command Reference .............. 25   LDT-5500B Series Device-Dependent Commands ..........27   Chapter 5 : Maintenance and Troubleshooting .......... 35   Calibration Overview ....................35  ...
  • Page 5 List of Figures LDT-5500B Series Front Panel ............14 Figure 2.1 LDT-5500B Series Back Panel............18 Figure 2.2 Back Panel TEC Connector ..............19 Figure 2.3 Thermistor Temperature Range ............50 Figure B.1 AD590 Nonlinearity ................54 Figure C.1 November 2017...
  • Page 6 List of Tables Accessories List .................. 10 Table 1.1 Specifications ..................11 Table 1.2 SENSOR SELECT Switch Positions ........... 18 Table 2.1 Remote Command Summary Reference List ........25 Table 4.1 Recommended Calibration Equipment List ......... 36 Table 5.1 Troubleshooting Reference List ............45 Table 5.2 Thermistor Sensitivity ................

  • Page 7: Safety And Warranty Information

    Safety and Warranty Information The Safety and Warranty Information section provides details about cautionary symbols used in the manual, safety markings used on the instrument, and the information about the Warranty including Customer Service contact information. Safety Information and the Manual Throughout this manual, the words Caution and Warning indicate potentially dangerous or hazardous situations which, if not avoided, could result in death, serious or minor injury, or damage to the product.

  • Page 8: Safety Symbols

    Safety Symbols This section describes the safety symbols and classifications. Technical specifications including electrical ratings and weight are included within the manual. See the Table of Contents to locate the specifications and other product information. The following classifications are standard across all ILX Lightwave products: ...
  • Page 9 Warranty ILX Lightwave warrants this instrument to be free from defects in material and workmanship for a period of one year from the date of shipment. During the warranty period, ILX Lightwave will repair or replace the unit, at our option, without charge. Limitations This warranty does not apply to fuses, lamps, defects cause by abuse, modifications, or use of the product for which it was not intended.
  • Page 10 Comments, Suggestions, and Problems To ensure getting the most out of ILX Lightwave products, direct any product operation, service related questions, or comments to ILX Lightwave Customer Support. Contact ILX Lightwave in whatever way is most convenient: Phone (800) 459-9459 or (406) 586-1244 (406) 586-9405 Email sales@ilxlightwave.com...

  • Page 11: Chapter 1 : Introduction And Specifications

    LDT-5500B Series and performs the non-linear conversion of thermistor resistance to temperature based on user-defined constants. The LDT-5500B Series can be configured to operate with a wide variety of thermistor temperature sensors and TE modules, as well as AD590 series and LM335 series temperature sensors.

  • Page 12: Available Options And Accessories

    Available Options and Accessories Options and accessories available for the LDT-5500B Series Temperature Controller include the following: Accessories List Table 1.1 DESCRIPTION MODEL NUMBER Single Rack Mount Kit, LDX-3500 Series & LDT-5500 Series RM-134 Dual Rack Mount Kit, LDX-3500 Series & LDT-5500 Series...

  • Page 13: Specifications

    Specifications Specifications Table 1.2 LDT-5525B LDT-5545B TEMPERATURE CONTROL OUTPUT Temperature Control Range C to 199.9 Temperature Setpoint Resolution Temperature Setpoint Accuracy Thermistor ±0.2 AD590 ±0.2 LM335 ±0.2 Short Term Stability (1 hour) <±0.006 Long Term Stability (24 hours) <±0.01 Temperature Coefficient TEC OUTPUT Type Bipolar current source...
  • Page 14 Temperature Resolution 10 A thermistor 100 A thermistor AD590 LM335 Accuracy ±0.5 C typical Thermistor Resistance Range 10 A thermistor 2.5 to 450k 100 A thermistor 0.25 to 45.0k Thermistor Resistance Resolution 10 A thermistor 0.1 k 100 A thermistor 0.01 k...

  • Page 15: Chapter 2 : Operation

    Installation Procedures AC Power Considerations The LDT-5500B Series Controllers can be configured to operate at nominal line voltages of 100, 120, and 230 VAC (±10%). This can only be done at the factory and need not be changed before operating the instrument. Before operating the instrument, verify that the voltage indicated on the back panel of the instrument matches the power-line voltage used in the operating environment.

  • Page 16: Usb

    Temperature Controller hardware. Each of the labeled areas on the front panel is described in this chapter. Refer to Figure 2.1 for the following discussions of the LDT-5500B Series Temperature Controller front panel sections. The key words are in CAPITAL LETTERS for quick identification.

  • Page 17: Parameters

    (TE current limit), LIM T (temperature limit), GAIN (sensor feedback amplifier gain) and CONST (sensor calibration values). The LDT-5500B Series will limit the ITE output to the LIM I value, regardless of the set point or control mode. The temperature is limited (via the sensor feedback) to the LIM T value. If the sensor reads a temperature which is greater than LIM T, the output will be disabled.

  • Page 18: Parameter Setup

    Parameter Setup The parameter SELECT button is used to view parameters. Repeatedly pressing the parameter SELECT switch will cycle through the parameters. When a parameter is selected for viewing, its value will remain on the display for three seconds. The parameter value can be changed by pressing the SET button and turning the adjust knob.

  • Page 19: Output And Control Mode

    Output and Control Mode The MODE section contains the mode SELECT button, which is used to select the instrument control mode. Repeatedly pressing the mode SELECT button cycles through the current (I TE), sensor reference (R), or temperature (T) control modes. The LED indicators show the selected mode. The MODE section also contains the OUTPUT button and indicator.

  • Page 20: Back Panel Controls And Connections

    Figure 2.2 LDT-5500B Series Back Panel Back Panel Controls and Connections Refer to Figure 2.2 for the following discussions of back panel controls and connectors. There are no user serviceable parts in the instrument, including the external fuses in the AC power entry module.

  • Page 21: Tec Connector

    See Chapter 3 for driver installation information. TEC Grounding Considerations The TEC outputs of the LDT-5500B Series are isolated from chassis ground, allowing either output terminal to be grounded at the user's option. Note: For the TEC connector, if any one terminal pin is grounded, then no other terminal pin should be grounded;...

  • Page 22: General Operating Procedures

    Operate the LDT-5500B Series Temperature Controller at an ambient temperature in the range of 0 to +40°C. Storage temperatures should be in the range of -40 to +70°C. To achieve rated accuracy, let the LDT-5500B Series Temperature Controller warm up for about 1 hour before use.

  • Page 23: Resistance Mode Operation

    Resistance Mode Operation a. Plug the LDT-5500B Series Temperature Controller into an AC power source supplying the correct voltage and frequency for the unit under operation (refer to the back panel for the correct ratings). b. Turn on the LDT-5500B Series Temperature Controller. The OUTPUT stage will be disabled at power up and the unit will automatically configure its parameters to the state which existed when the power was last shut off.
  • Page 24 November 2017 70019907 LDT-5500B Manual...

  • Page 25: Chapter 3 : Remote Operation

     Command Syntax To begin using the USB port on the LDT-5500B Series Temperature Controller, please install the Virtual Com Port Driver which is available on the companion CD or from our website. A standard USB A/B cable is necessary to connect the instrument to a PC and is included in the shipping kit.

  • Page 26: Command Termination

    Command Termination Each USB command or query must always be terminated with the new line character: '\n' or 0x0A. Boolean Parameter Values Boolean values (0 and 1) are used to represent On/Off or True/False. Command Timing and Completion All commands are executed in a sequential manner. Error Messages Error messages are reported using the available commands to query for individual errors such as TEMPERATURE LIMIT, SENSOR OPEN, TE CURRENT LIMIT, and TE OPEN.

  • Page 27: Chapter 4 : Command Reference

    Chapter 4 : Command Reference This chapter is a guide to all the commands for the LDT-5500B Series Temperature Controller.  Overview of Remote Commands  List of Commands in Alphabetical Order Table 4.1 shows the format for the device command descriptions in this chapter. The commands that emulate local (front panel) operation are denoted by “FRONT PANEL”...
  • Page 28 Sets the constant sensor resistance; only available in constant R mode TEC:R NONE Returns the measured temperature sensor value TEC:R? NONE Returns the position of the SENSOR SELECT switch TEC:SEN? NONE Returns the constant ITE (TEC current) set point TEC:SET:ITE? Returns the constant R (temperature sensor value) set point NONE TEC:SET:R?

  • Page 29: Ldt-5500B Series Device-Dependent Commands

    LDT-5500B Series Device-Dependent Commands The following pages contain a reference for the commands of the LDT-5500B Temperature Controller. This reference contains useful information for both local and remote operation of the LDT-5500B series. In some references, parentheses are used to signify the labeled area for a particular switch or LED indicator on the front panel.
  • Page 30 SENSOR_OPEN? RONT ANEL EMOTE Description Returns the status of the sensor open error. Parameters None. Notes This error will disable the output and occurs if the connection for the thermistor or linear temperature sensor is open. Examples Query: SENSOR_OPEN? Response: Temperature sensing connections are connected.
  • Page 31 Parameters None. Notes Query can be used to poll the LDT-5500B Series Temperature Controller after the unit has entered into remote calibration mode. If the response is 1, the LDT-5500B is ready to receive a calibration value. Examples...
  • Page 32 TEC:GAIN RONT ANEL EMOTE TEC:GAIN? Description Sets/returns the value of the control loop gain. Parameters 1, 3, 10, 30, 100, or 300. Notes If the user enters a gain value which does not equal 1, 3, 10, 30, 100, or 300, the instrument will ignore the command.
  • Page 33 TEC:LIM:THI RONT ANEL EMOTE TEC:LIM:THI? Description Sets/returns the temperature limit value. Parameters A value which represents the upper bound of the load temperature, in °C. Notes Temperature limit value must be in the range -99.9°C to 199.9°C. This value also becomes the maximum temperature set point. This value will force the TEC output to be shut off if the temperature limit is reached.
  • Page 34 TEC:MODE:T RONT ANEL EMOTE Description Sets constant temperature control mode. Parameters None. Notes Since the load temperature is derived from sensor resistance, constant R and T modes are related. In T mode, the set point is converted to a resistance for reference using the appropriate constants and conversion model.
  • Page 35 TEC:SEN? RONT ANEL EMOTE Description Returns the position of the SENSOR SELECT switch. 1 = 100A thermistor; 2 = 10A thermistor; 3 = LM335; 4 = AD590. Parameters None. Notes The sensor code is displayed on the TEC display whenever the back panel SENSOR SELECT switch position is changed.
  • Page 36 TEC:T RONT ANEL EMOTE TEC:T? Description Sets/returns the TECs constant temperature set point. Parameters A value which represents the temperature set point, in °C. Notes The TEC temperature is controlled to this set point only when the TEC is operated in T mode. If the maximum temperature limit is set (see TEC:LIM:T), this limit becomes the maximum set point value as well.

  • Page 37: Chapter 5 : Maintenance And Troubleshooting

    To avoid electric shock, the user should not perform any of the procedures described in this chapter unless qualified to do so. High voltages are present on and around the printed circuit boards of the LDT-5500B Series Temperature Controller. Calibration Overview The LDT-5500B Series Temperature Controller should be calibrated every 12 months or whenever performance verification indicates that calibration is necessary.

  • Page 38: Recommended Equipment

    0 to 40°C. Warm Up The LDT-5500B Series Temperature Controller should be allowed to warm up for at least 1 hour before calibration. November 2017...

  • Page 39: Calibration Adjustments

    Calibration Adjustments There are two calibration adjustments that need to be made for the LDT-5500B Series Temperature Controller. They are calibration of sensor measurement and calibration of the ITE current measurement and limit circuits. If a problem arises during calibration which prevents its normal completion, the calibration may be aborted with no ill effects by simply pressing the OUTPUT switch.

  • Page 40: Remote Thermistor Calibration

    Connect the 4k (for 100A) or 40k (for 10A) metal film resistor to the sensor input of the LDT-5500B Series Temperature Controller (pins 7 and 8). d. Enter the sensor calibration mode by sending the command TEC:CAL:SEN. After this, the display will indicate the sensor resistance in kΩ.

  • Page 41: Ad590 Sensor Calibration

    Connect a precision 20k metal film resistor and a precision ammeter in series at the sensor input of the LDT-5500B Series Temperature Controller (pins 7 and 8). c. Enter the sensor calibration mode by pushing the display SELECT and parameter SET buttons at the same time.

  • Page 42: Remote Ad590 Sensor Calibration

    Connect a precision 20k metal film resistor and a precision ammeter in series at the sensor input of the LDT-5500B Series Temperature Controller (pins 7 and 8). c. Enter the sensor calibration mode by sending the command “TEC:CAL:SEN”. After this, the TEC display will indicate sensor reference current in A.

  • Page 43: Lm335 Sensor Calibration

    Connect a precision 4k metal film resistor and a precision voltmeter in parallel at the sensor input of the LDT-5500B Series Temperature Controller (pins 7 and 8). c. Enter the sensor calibration mode by pushing the display SELECT and parameter SET buttons at the same time.

  • Page 44: Remote Lm335 Sensor Calibration

    Connect a precision 4k metal film resistor and a precision voltmeter in parallel at the sensor input of the LDT-5500B Series Temperature Controller (pins 7 and 8). c. Enter the sensor calibration mode by sending the command “TEC:CAL:SEN”. After this, the TEC display will indicate sensor reference current in mV.

  • Page 45: Ite Current Calibration

    Enter the calibration mode by pushing the display SELECT and mode SELECT buttons. This will put the LDT-5500B Series into ITE calibration mode. Wait for three seconds for the output to settle to about 3 Amps (LDT-5525B); 4 Amps (LDT-5545B).

  • Page 46: Remote Ite Current Calibration

    5545B, the set points are 4A, -4A, 4A, 1A, -1A and -4A. After the last set point is entered, the LDT-5500B Series Temperature Controller’s front panel will go blank while the instrument calibrates the ITE set point and current limits.

  • Page 47: Troubleshooting

    Troubleshooting This section is a guide to troubleshooting the LDT-5500B Series Temperature Controller. Some of the more common symptoms are listed here, and the appropriate troubleshooting actions are given. It is recommended that the user start at the beginning of this guide. Read the symptom descriptions, and follow the steps for the corrective actions which apply.
  • Page 48 November 2017 70019907 LDT-5500B Manual...

  • Page 49: Appendix A: Steinhart-Hart Equation

    Appendix A: Steinhart-Hart Equation Reference the ILX Lightwave Application Note “Thermistor Calibration and the Steinhart-Hart Equation” for information on this equation. November 2017 70019907 LDT-5500B Manual...
  • Page 50 November 2017 70019907 LDT-5500B Manual...

  • Page 51: Appendix B: Sensing Current And Thermistor Selection

    In the LDT-5500B Series Temperature Controller, the practical upper temperature limit is the temperature at which the thermistor becomes insensitive to temperature changes. The lower end of the temperature range is limited by the maximum input voltage of the LDT-5500B Series Temperature Controller.

  • Page 52: Temperature Resolution

    Series, the temperature measurement resolution would be reduced to about 0.2°C. If the 100A setting were used instead, the thermistor measurement would change by 14mV from 49 to 50°C, providing the maximum resolution of 0.1°C (with the LDT-5500B Series). November 2017...

  • Page 53: Selecting The Sensing Current

    Therefore, the sensor current chosen may impact the temperature measurement resolution as well as the set point control accuracy. Selecting the Sensing Current To select the current setting for a typical 10kΩ thermistor, determine the lowest temperature needed to sample and set the SENSOR SELECT switch according to the range limits in Table B.2.
  • Page 54 November 2017 70019907 LDT-5500B Manual...

  • Page 55: Appendix C: Ad590 And Lm335 Sensor Calibration

    Appendix C: AD590 and LM335 Sensor Calibration The LDT-5500B Series Temperature Controller uses two constants (C and C ) for calibrating linear thermal sensing devices, such as the AD590, and the LM335. C is used as the linear or zero offset value, and C is used as the slope or gain adjustment.

  • Page 56: Ad590 Sensor

    +150°C). This nominal value can be expressed as: 1μ where i is the nominal current produced by the AD590, and K is in Kelvin. The LDT-5500B Series Temperature Controller uses i to determine the nominal temperature, T by the formula: − 273.15 1μ...

  • Page 57: Lm335 Sensor

    C are the constants stored by the user in the LDT-5500B Series Temperature Controller for the LM335. When the LDT-5500B Series is shipped from the factory, the LM335 measurement system is calibrated, but the sensor (C and C ) is not. Nominally, C = 0, and C = 1.

  • Page 58: One Point Calibration Method

    (slope) is known and is correct. 1. Allow the LDT-5500B Series Temperature Controller to warm up for at least one hour. Set the SENSOR SELECT switch for the desired sensor type, and RECALL the constants for the particular device to be calibrated.

  • Page 59: Two Point Calibration Method

    (slope). 1. Allow the LDT-5500B Series Temperature Controller to warm up for at least one hour. Set the SENSOR SELECT switch for the desired sensor type, and RECALL the constants for the particular device to be calibrated.

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