Accu-Wave Radar Gauge Radar-Based Continuous Level Measurement Installation Manual DRAFT Part No.
Accu-Wave Radar Gauge Radar-Based Continuous Level Measurement Installation Manual DRAFT Part No. 717790 Version 1.
Disclaimer TN Technologies has made every effort to ensure the accuracy and completeness of this manual. However, we cannot be responsible for errors, omissions or any loss of data as a result of errors or omissions. TN Technologies reserves the right to make changes to the manual or improvements to the product at any time without notice. The material in this manual is proprietary and cannot be reproduced in any form without express written consent from TN Technologies.
Accu-Wave Table of Contents Table of Contents Chapter 1 Introduction ................................................................................................................................ 1-1 Description ..................................................................................................................................................... 1-1 Features and Benefits ........................................................................................................................
Accu-Wave Chapter 1 Introduction Chapter 1 Introduction The Accu-Wave Model 1440 Radar Level Gauge uses a microwave signal to continuously measure the level of the process material. The Accu-Wave provides better performance than sonic measurement systems, particularly in hostile environments, because the microwave signal is unaffected by mist, surface agitation, temperature changes, or pressure changes.
Chapter 1 Introduction Accu-Wave Measurement accuracy, however, is degraded when the process level is above the bottom of the probe.
Accu-Wave Chapter 1 Introduction Input/Output Characteristics Type Characteristics Comments 0-20 mA dc (adjustable range) Default range is 4-20 mA dc. Isolated, Loop-Powered, 24 Vdc Nominal Supply Voltage, 700 ohm max. load One current output is provided. RS485: One terminal block and one RJ11 Jack Half-duplex party line communication to host computer or Hand-Held Terminal. RS 232: One terminal block (Requires optional board.) Full duplex communication with a remote terminal or PC.
Chapter 1 Introduction Accu-Wave Extensive Alarms You can set up as many as 16 process alarms in addition to system fault alarms and warning alarms. Quick and Easy Setup The menus take you through the setup procedure step–by–step. Built-in help screens are provided at appropriate points in the menu structure.
Accu-Wave Chapter 1 Introduction Automatic verification and error correction software continuously monitors system operations. System faults can be programmed to set off alarms. How to Use This Manual This manual provides installation and maintenance/troubleshooting procedures for the Accu-Wave gauge. Installation and Maintenance Note: Reduced-size copies of the drawings referenced in this manual are included in .
Accu-Wave Chapter 2 Hardware Installation Chapter 2 Hardware Installation Licensing All microwave frequency tuning is completed at the factory (TN Technologies Inc., Round Rock, Texas).
Chapter 2 Hardware Installation Accu-Wave Hazardous Location Approvals The Accu-Wave is certified for use in hazardous locations as follows (approvals are pending as of 1 March 2000): FM • • • Class I, II, III, Division 1, Groups B, C, D, E, F, G Class I, II, III, Division 2, Groups B, C, D, F, G NEMA 4X CSA • • • Class I, II, III, Division 1, Groups B, C, D, E, F, G Class I, II, III, Division 2, Groups B, C, D, E, F, G TYPE 4X CENELEC • • EEx d IIB + H2 Eex n IIB + H2 Warning: Do not locate the un
Accu-Wave Chapter 2 Hardware Installation 3. There should be a clear path between the sensor and process material to avoid false reflections. Verify that the path is clear of pipes, beams, or any intermittent liquid sprays that could block the microwave beam.
Chapter 2 Hardware Installation Accu-Wave Mounting the Gauge When mounting the gauge, ensure there are no obstructions between the antenna and the surface of the process material. If obstructions cannot be avoided, refer to “False Echo Management” in the Accu-Wave Operation Manual (717791). Caution: Use proper lifting procedures to avoid injury.
Accu-Wave Chapter 3 Wiring Procedures Chapter 3 Wiring Procedures The Accu-Wave electronics includes the following boards. • • • Main Electronics Board RS-232 daughter board (optional). Hart Communications daughter board (future option). The required wiring steps are: • • connect 24 Vdc power supply to the gauge, and connect a remote computer terminal or Hand Held Terminal to the gauge via the serial communication port.
Chapter 3 Wiring Procedures Accu-Wave Wiring Instructions You will need a 1/8 inch bladed screwdriver to connect the wires to the plug-in connector. Refer to the Installation Layout drawing 868637 and Wiring diagram 868641. Follow all notes on the drawings. To wire the gauge: 1. Loosen the retaining screw at the base of the enclosure lid, then unscrew and remove the enclosure lid. 2. Pull the cable(s) through the conduit opening(s) in the enclosure. 3.
Accu-Wave Chapter 3 Wiring Procedures Serial Communications The gauge provides an RS-485 multi–drop serial interface port. An RS-232 single–drop is available with the optional RS-232 daughter board Both ports provide independent access to the measurements and software functions. The ports can be used simultaneously.
Accu-Wave Appendix A Returning Equipment for Service Appendix A How to Return Equipment for Service Call the TN Technical Services Department (Factory Service division) before returning equipment for repair. Many problems can be diagnosed and resolved over the phone. For after hours or weekend service, call our 24-hour Service number: 512-388-9320. Please include the following information with all units returned for repair: 1. Specific information about the problem. 2.
Accu-Wave Appendix B Parts List Appendix B Parts List Part No.
Accu-Wave Appendix C Specifications Appendix C Specifications Operating Principle Frequency modulated continuous wave (FMCW) radar signal which measures distance; microprocessor based transmitter computes level, volume and nine other measurements. Range Up to 115 ft. (35 m.) Reference Accuracy ±3 mm (1/8 in.) Repeatability ±3 mm (1/8 in.) Input Power 24 Vdc ±25%, 12 W Serial Outputs & Inputs RS-485 (Standard): Half duplex partyline communication to a host computer or hand-held terminal.
Accu-Wave Appendix D Drawings Appendix D Installation Drawings This Appendix contains reduced size copies of the drawings referenced in this manual. The drawings are provided in the order listed below.
