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Arroyo Instruments TECPak 585 Series User Manual

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  • Page 2: Table Of Contents

    Page 2 · TECPak User’s Manual Table of Contents Introduction ......................3   Safety Terms and Symbols ..................4   Quick Start ....................... 6   Installation ....................... 7   Operating Modes ....................9   Settings ........................10   Arroyo Control ....................... 14  ...

  • Page 3: Introduction

    Computer Interfacing Manual, and USB drivers are included. For USA customers, a power cord is included. For non-USA customers, an IEC-60320- C13 rated AC power cord must be provided. Accessories Arroyo Instruments also sells several accessories designed to work with the TECPak. These include:  1260B...

  • Page 4: Safety Terms And Symbols

    Storage of the unit outside the standard storage temperature or humidity rating, or prolonged storage under harsh conditions;  Failure to operate properly. If needed, contact your distributor or Arroyo Instruments for service or repair to ensure the safety of the product is maintained.
  • Page 5 CAUTION There are no user-serviceable parts inside. All service and repair work shall be done by Arroyo Instruments or personnel authorized by Arroyo Instruments. Modifications done by non-authorized personnel will void the warranty. Please see the Service section later in this manual for instructions on how to obtain service for this instrument.

  • Page 6: Quick Start

    Page 6 · TECPak User’s Manual Quick Start TECPak was designed with ease of use in mind, and you will likely have little need for this manual for almost all of the features the unit offers. This section will show how you can quickly get the unit up and running in almost no time.

  • Page 7: Installation

    TECPak User’s Manual · Page 7 You can use the AutoTune feature to automatically calculate the best PID values, or select from a set of eight factory preset values that typically cover most applications. To use the factory gains, if the temperature is quickly jumping up and down, the Gain will typically need to be reduced.
  • Page 8 Page 8 · TECPak User’s Manual Ventilation TECPak has vent holes on the front and rear of the unit. You must not block these vent holes, or overheating may occur, causing damage to the unit. CAUTION Do not operate the unit above +40°C ambient, and ensure the instrument is properly ventilated, or the unit may overheat and possible damage to the instrument may occur.

  • Page 9: Operating Modes

    TECPak User’s Manual · Page 9 Operating Modes Control Modes TECPak offers three control modes: constant temperature mode (T Mode), constant resistance mode (R Mode), and constant current mode (Ite Mode). Changing the control mode can only be done through the computer interface, either through Arroyo Control, or by sending the appropriate TEC:MODE command.

  • Page 10: Settings

    Page 10 · TECPak User’s Manual Settings All parameters of the TECPak can be viewed and changed over the computer interfaces. In addition, the set point can be changed via the analog interface, if it is enabled. Most parameters can be changed using a standard command, as defined in the Computer Interfacing Manual or through the Settings…...
  • Page 11 TECPak User’s Manual · Page 11 Name Description Factory Computer Default Command PID I The integral term of the PID 0.01 TEC:I loop. Will only be available if Gain is set to PID. PID D The derivative term of the PID TEC:D loop.
  • Page 12 Page 12 · TECPak User’s Manual Name Description Factory Computer Default Command R-Low Lim R-Low Lim is the sensor low 0.01kΩ TEC:LIM:RLO limit. If operating in R Mode and the actual sensor measurement drops below this value, the output will be turned off. R limits are not monitored in Ite Mode.
  • Page 13 TECPak User’s Manual · Page 13 Name Description Factory Computer Default Command Ext Fan This selects the voltage for the TEC:FAN auxiliary fan power supply. See the External Fan Control section below for more information. Ext Fan Pwr When Ext Fan is set to Custom, 12.0 TEC:FAN this sets the specific fan voltage...

  • Page 14: Arroyo Control

    Page 14 · TECPak User’s Manual Name Description Factory Computer Default Command RTD C C term in the RTD equation. 4.00000E-12 TEC:CONST RTD R term in the RTD equation. 100.00 TEC:CONST Communications Settings Baud This sets the baud rate for the 9600 N/A, fixed at 9600...

  • Page 15: Front And Rear Panels

    TECPak User’s Manual · Page 15 Front and Rear Panels TECPak features four connections (in addition to the input power connector). They are: USB, RS-232, analog, and output connectors. The first three are located on the front of the unit, while the output connector is located on the rear of the unit.
  • Page 16 Page 16 · TECPak User’s Manual TEC Output Connector The Output connection is a female DB-15, and has the following pin-out: DB-15 Pin Description 1, 2, & 9 TE (+) 3, 4, & 10 TE (-) 5 & 6 Earth Ground Sensor+ Sensor- Fan+...
  • Page 17 TECPak User’s Manual · Page 17 USB Connector The USB connector is a standard Type B female connector, and can be plugged into any USB 1.1 or USB 2.0 port. For more information on using the USB interface, see the Computer Interfacing Manual which is included on the CD that accompanied this product.

  • Page 18: Connecting To The Tecpak

    The 1260B or 1262B TECSource Cable (not included) is a two meter cable, designed for use with Arroyo Instruments mounts and has DB-15 connectors on both ends, one male and one female. The 1262B is typically only used for applications requiring the 4-wire RTD measurement mode.

  • Page 19: Working With Thermistors

    TECPak User’s Manual · Page 19 Working With Thermistors TECPak is designed to work with negative temperature coefficient (NTC) thermistors, such as the BetaTHERM 10K3A1 thermistor used in the LaserMounts. A thermistor works by translating temperature into resistance, with resistance decreasing as temperature increases (hence the ‘negative coefficient’).
  • Page 20 Page 20 · TECPak User’s Manual TECPak supports operation using a 10μA or 100μA constant current source, which limits the upper control range to 450kΩ and 45kΩ, respectively. To minimize noise and maximize stability, you should select highest current while still allowing you full operation across your required temperature range. The typical setting is 100μA, but your application will determine the actual needs.

  • Page 21: Working With Rtds

    TECPak User’s Manual · Page 21 Working With RTDs Like thermistors, RTDs also function by converting temperature into resistance, but unlike thermistors, RTDs increase in resistance as temperature increases. RTDs are also a fairly linear device, meaning they can be used across a much broader temperature control range.
  • Page 22 Page 22 · TECPak User’s Manual 2-Wire versus 4-Wire Measurements One concern in using RTDs are their relatively low resistance (typically 100Ω at 0°C), and small Ω/°C. Because of these two factors, the resistance of the cable used to connect to the sensor can become a significant error in the sensor measurement.

  • Page 23: User Calibration Of Resistance Sensors

    TECPak User’s Manual · Page 23 User Calibration of Resistance Sensors In some applications, having the ability to compensate, or calibrate, the sensor measurement is desired, such as referencing to an internal standard or to match the readings of another instrument. This is supported on the TECSource using the TEC:USERCAL:PUT command to apply an offset and/or slope compensation to thermistor or RTD readings.

  • Page 24: Controlling The Temperature Rate Of Change

    Page 24 · TECPak User’s Manual Controlling the Temperature Rate of Change Some applications require that temperature is changed at a specific rate to prevent damage that might otherwise come from rapid changes in device temperature. Using the TEC:TRATE command, it is possible to control the temperature ramp rate of the controller, limiting the rate of change to specific degrees Celsius per minute.

  • Page 25: Resistive Heaters And Heat/Cool Only Modes

    TECPak User’s Manual · Page 25 Resistive Heaters and Heat/Cool Only Modes TECPak supports temperature control using resistive heaters instead of Peltier coolers. With resistive heaters, cooling is obviously not possible, and the TECPak must be configured to not attempt to cool the output, or a run-away condition will occur when the cooling current actually causes additional heating.

  • Page 26: Using The Autotune Function

    Page 26 · TECPak User’s Manual value until the set point is achieved without oscillation. In many systems, the D term is not needed and may be left at zero. For additional information on PID loop tuning, consult online resources such as Wikipedia (http://en.wikipedia.org/wiki/PID_controller) or search for terms such as “Ziegler-Nichols method”, or “PID Loop”.

  • Page 27: Compensating For Cable Resistance

    TECPak User’s Manual · Page 27  Any condition that causes the output to turn off (temperature limits, sensor limits, etc.)  Systems with very low P or I terms In the Auto-Tune fails due to thermal system limitations, you will need to manually modify the PID parameters as described in the section above or select factory gain setting.

  • Page 28: Using The Analog Interface

    Page 28 · TECPak User’s Manual Using the Analog Interface The Analog Interface is a feature not found on our bench top temperature controllers, as it is designed to be used in applications where a user interface, or even a PC, is not required. The Analog Interface has two sections: the logic level control/status pins, and the analog control/monitor pins, plus an auxiliary power supply.
  • Page 29 TECPak User’s Manual · Page 29 state. Later, if the logic input goes from true to false, then the output will be turned off. In this way, on/off operation can be supported simultaneously through the analog interface and the PC interface without conflict. On/Off Status Output This logic level output reflects the present output state of the instrument.
  • Page 30 Page 30 · TECPak User’s Manual For example, if V was 1.00V, T was 200 and T was -100, then ANALOG-HIGH ANALOG-LOW would be 20°C: SETPOINT = (1.00 / 2.5 * (200 – (–100)) + (–100), or SETPOINT = (1.00 / 2.5 * (200 + 100)) – 100 = 20 SETPOINT To achieve less sensitivity per °C, you can narrow the high and low temperature points to the actual operating range you need (perhaps T...
  • Page 31 TECPak User’s Manual · Page 31 First, to calculate the actual sensor resistance, you need to take the voltage output and multiply it by two. This is because the output voltage goes through a divide-by-two circuit before being output, and you need to double it to return it to the actual voltage.
  • Page 32 Page 32 · TECPak User’s Manual Connecting to the Analog Interface Connecting to the Analog Interface is very straightforward. Because the inputs and outputs are buffered, you do not need any external filters or buffers, unless your application requires it. The logic level interfaces are all high impedance, as is the Analog Set Point Input.

  • Page 33: Specifications

    TECPak User’s Manual · Page 33 Specifications All values relate to a one-hour warm-up period. Specifications for standard models. Custom models may vary. Description 585-04-08 585-05-12 Drive Channel Current Range (A) Compliance Voltage (V) Max Power (W) Resolution (A) 0.01 Accuracy (+/- [% set point + mA]) 0 + 30 Noise/Ripple (mA, rms)
  • Page 34 Page 34 · TECPak User’s Manual Range (Ω) 20 – 192 Resolution (Ω) 0.01 Accuracy (+/- [% reading + Ω]) 0.03 + 0.1 Current Limit Resolution (mA) Accuracy (+/- mA) Other Fan Supply 4 – 8.5V, 350mA max TEC Connector Female DB-15 Computer Interface USB 2.0 Full Speed (Type B),...

  • Page 35: Error Messages

    TECPak User’s Manual · Page 35 Error Messages Error Description Cause Code E-100 General Error The error code is non-specific, and is generally used when no other error code is suitable. E-102 Message too long The message is too long to process (USB/Serial only).
  • Page 36 Page 36 · TECPak User’s Manual Error Description Cause Code E-415 Sensor short, output A sensor short circuit was detected and the turned off output was turned off. E-416 Cal failed An error occurred during calibration that caused the calibration to fail. The unit is no longer in calibration mode.

  • Page 37: Calibration, Maintenance And Service

    TECPak can be obtained by contacting the distributor from where you purchased the instrument, or directly from Arroyo Instruments. A complete list of distributors is available on the Arroyo web site. You can contact Arroyo Instruments through one of these methods:...
  • Page 38 User’s Manual Warranty Arroyo Instruments warrants that this product will be free from defects in material and workmanship and will comply with Arroyo Instruments’ published specifications at the time of sale for a period of one year from date of shipment.
  • Page 39 TECPak User’s Manual · Page 39 European Community Declaration of Conformity EC Declaration of Conformity I/We Arroyo Instruments 1201 Prospect Street San Luis Obispo, CA declare that 585 Series TECPak In accordance with the following directives EMC Directive: 89/336/EEC Low Voltage Directive: 73/23/EEC...
  • Page 40 Page 40 · TECPak User’s Manual Copyright © 2019, Arroyo Instruments. All Rights Reserved. P/N 530-1017 Rev G...

This manual is also suitable for:

Tecpak 585-04-08Tecpak 585-05-12

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