Extech Instruments 48VTR Instruction Manual
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Extech Instruments 48VTR Instruction Manual

Extech Instruments 48VTR Instruction Manual

1/16 din process controller
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Model 48VTR 1/16 DIN Process Controller
1. INTRODUCTION
The 48VTR is a microprocessor-based device which can compare a process input
(thermocouple, RTD, or analog input) to a user-programmable setpoint and adjust the
process (via relay or analog output), to bring the process to the desired setpoint. This Three-
Mode PID controller offers:
Simultaneous Process Value (PV) and Setpoint Value (SV) display
Automatic alarm functions (11 in all)
Auto-Tuning automatically tailors the controller's response to a specific process
Security lock-out
Ramp-to-Setpoint and Soak functions
Input selectability
Visit us at www.TestEquipmentDepot.com
Back to the Extech 48VTR Product Info Page
Instruction Manual
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
English / Español

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  • Page 1 Model 48VTR 1/16 DIN Process Controller 1. INTRODUCTION The 48VTR is a microprocessor-based device which can compare a process input (thermocouple, RTD, or analog input) to a user-programmable setpoint and adjust the process (via relay or analog output), to bring the process to the desired setpoint. This Three-...

  • Page 2: Specifications

    F (-200 to 500 C); (DIN or JIS) Linear input range -1999 to 9999 display span (for 4-20mA, 1-5V, or special DC input). Temperature Stability 5uV/ C typical Repeatability 0.83 C (Thermocouple); 0.2 C (RTD); 1 digit (Linear) 48VTR English 9/00 Ver. 2.7...

  • Page 3: Mounting And Wiring

    Inputs: Terminal 1 is negative and terminal 2 is positive for TC and Analog inputs. 3- wire RTD use terminals 1-2-3 as shown. 2-wire and 4-wire RTD can also be used, refer to Figure 3. 48VTR English 9/00 Ver. 2.7...

  • Page 4: Meter Description

    LED lists the input types (J, K, Linear, etc.). The user can then select the desired type using the programming keys. Refer to later sections for more on programming. 48VTR English 9/00 Ver. 2.7...

  • Page 5: Return Key

    (0.0-100.0%). Press this key from any other mode to return to the normal SV display. The RETURN key is also used with the SCROLL key (pressed simultaneously) to move from one programming level to another. 48VTR English 9/00 Ver. 2.7...
  • Page 6 Try Auto Tuning first and then use Manual tuning afterward to fine tune the parameters if desired. For the instructions on how to initiate an Auto Tune session, refer to Sec. 11 48VTR English 9/00 Ver. 2.7...
  • Page 7 Act: Output control action. Set to "0" for cooling (direct) action or "1" for heating (reverse) action. unit: Unit of measure selection. Program as follows: degrees F degrees C Process inputs 48VTR English 9/00 Ver. 2.7...
  • Page 8 HiLt: High limit (of Span or Range). Set High Limit higher than the highest expected SV and PV display. Note that the high limit is restricted to the specification for the type of input selected. 48VTR English 9/00 Ver. 2.7...

  • Page 9: Auto Tuning

    Auto Tune session will automatically begin from Table III below. The controller defaults to Setting = ‘0’ (user initiates an Auto Tune session). To manually initiate an Auto Tune session, follow the procedure in Section 11.2. 48VTR English 9/00 Ver. 2.7...
  • Page 10 Manual mode. To manually adjust the controller's output, use the UP and DOWN arrow keys. To return to normal operation, press the RETURN key again. To re-lock the feature, press and hold the UP Arrow and RETURN keys until the display blinks. 48VTR English 9/00 Ver. 2.7...
  • Page 11 13. RAMP AND SOAK FUNCTIONS The Extech 48VTR controller operates as a fixed setpoint controller. However, the controller offers several advanced features which can enhance your application. These include Ramp-to-Setpoint and Soak/Event Timers. Refer to the details below. 13.1 Ramp-to-Setpoint (‘rAmP’ Parameter) To limit the rate at which the controller allows the process (PV) to move towards setpoint (SV), enter a value in units per minute for the 'rAmP' parameter.

  • Page 12: Customer Service

    15. WARRANTY EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a limited warranty may apply on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext.

  • Page 13: Appendix B - Programming Example

    The parameters not listed below either Heater Control Output inconsequential with (Adjusts Heater) regard to this example or they will not appear on the controller display due to the controller configuration. 48VTR English 9/00 Ver. 2.7...
  • Page 14 Calibration is rarely required. If calibration must be performed refer to Section 10 for details or contact Extech.' 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com Back to the Extech 48VTR Product Info Page 48VTR English 9/00 Ver. 2.7...

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