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Vishay JetWeigh-W Technical Manual

Wireless aircraft weighing system
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Summary of Contents for Vishay JetWeigh-W

  • Page 2 Vishay reserves the right to revise this manual at any time and to make changes in the contents hereof without obligation to notify any person of such revision or changes.

  • Page 3: Table Of Contents

    contents contents contents contents contents Table of Contents Section I - General Information 1.1 INTRODUCTION ........................1-1 1.2 SYSTEM COMPONENT DESCRIPTIONS ................1-2 1.2.1 Wireless Handheld Terminal .......................... 1-2 1.2.2 Wireless Load Cells ............................1-2 1.2.3 Load Cell Adapters ............................1-2 1.2.4 Thermal Printer ..............................

  • Page 4: Section I - General Information

    Aircraft Weighing System. sooner if trouble is observed or erroneous readings are suspected. JetWeigh-W kits are designed primarily for the weigh- ing of aircraft and aerospace vehicles, but can be The load imposed on a load sensor produces an used for other precision weighing applications, as well output signal directly proportional to the load applied.

  • Page 5: System Component Descriptions

    1.2.4 Thermal Printer surface of an adapter or the aircraft jack pad directly. JetWeigh-W systems ship with a high speed thermal printer. At the end of each weighment, aircraft specifi- NOTE: Load cells of identical capacity are interchange- cations, resultant weight data, and all other calcula- able.

  • Page 6: Section Ii - Pre-Operation

    10. The JetWeigh-W is programmed to identify left, 2.1.2 Preparation for Aircraft Weighing right, nose, or the sum of both sensors on a bogie. 1. Review the Equipment List of the aircraft being This requires that specific channels (load cells) be weighed.

  • Page 7: Terminal Setup

    Touch (with stylus - throughout) setup on the lower left corner of the screen to enter setup mode. Vishay recommends that setup be performed with the power adapter plugged in to conserve battery charge for actual wireless weighment.

  • Page 8: Gravity Factor Compensation

    Pre-operation Pre-operation Pre-operation Pre-operation Pre-operation c). Stability – use the drop-down menu to select 2.2.4 A/C The A/C menu (Figure 2-5) allows users to choose Normal, Relaxed, or User. Ambient air currents always affect weighments to some extent. If the from a predefined list of over 200 aircraft, or define aircraft is weighed indoors (hanger environment), the dimensions of a custom (“Other”) aircraft.

  • Page 9: Channel

    (based upon ID entry in segment “d” of paragraph 2.2.4). After completing all sequential parameter entries, the JetWeigh-W System is ready for “live” weighing op- eration. Figure 2-7. Changing Channel ID Information Figure 2-6. Load Cell Channel Configuration...

  • Page 10: Section Iii - Operation

    NOTE: The Operation LED should remain in the off state until actual weighment begins. 3.3 AIRCRAFT WEIGHING CYCLE Prior to weighment, Vishay recommends that the air- craft be raised and lowered 2 or 3 times (“dry runs”) to acclimate system load cells. Actual weighing is ac- complished in six steps;...
  • Page 11 Operation Operation Operation Operation Operation NOTE: A reading of NA for any valid channel indi- NOTE: cates that the load cell is malfunctioning or in the “OFF” If a red “battery” symbol appears to the left of any state. Zeroing is not valid. If the problem persists, re- channel ID, the load cell battery must be recharged fer to the Section IV - Troubleshooting.

  • Page 12: Lifting

    Operation Operation Operation Operation Operation 3.3.2 Lifting At this juncture, the aircraft must be jacked up so that it is resting exclusively on the load cell based jacks. Jacking should be done in accordance with aircraft manufacturer specifications, if provided. During the jacking or lifting phase, the Lifting menu (Figure 3-5) displays the successive measurements from all active channels and indicates the stability of the measure-...
  • Page 13 Operation Operation Operation Operation Operation 3.3.3 Weighing NOTE: Weighing (Figure 3-8) displays the current weight and The operator must be satisfied that the weighment percent of load readings for each channel (load cell). is valid in addition to the instruments “stable” Weight values for each channel are recorded on the prompt.

  • Page 14: Removing

    WARE. It is important that all load sensors are clear of the aircraft to provide a good zero return. The JetWeigh-W performs automatic checks to assure a good zero return (zero tracking if selected) and com- pensate for minor tolerance variations during zero re- turn.

  • Page 15: Section Iv - Weighing History

    4.2 RECALLING AIRCRAFT FROM THE LIBRARY. Many standard aircraft configurations are recorded in the JetWeigh-W Library. To choose a configuration from the library, view the drop down list at the Setup/ Aircraft Data page, as shown in Figure 4-2. Figure 4-3. Input Aircraft Screen...

  • Page 16: Section V - Troubleshooting

    Troubleshoot Troubleshoot Troubleshoot Section V - Troubleshooting Table 5-1. LED Status Indication 1.1 TROUBLESHOOTING OVERVIEW Section V provides troubleshooting information for the JetWeigh-W system. In many cases, simple battery System Load Cell LED Handheld Terminal Status State LED State charging or recharging will resolve communication and operation problems.

  • Page 17: Changing Rf Channels

    troubleshoot troubleshoot troubleshoot troubleshoot troubleshoot 3.4 CHANGING RF CHANNELS Communication problems are often resolved by switch- ing to a different RF channel. Figure 5-1 shows the Switch Channel button. Touching this button toggles the label caption between channels. Save the optimal channel settings by touching the Save Settings button.
  • Page 18 +1-301-722-7330 FAX: +250-762-9811 E-MAIL: vsi.usa@vishaymg.com E-MAIL: vsi.can@vishaymg.com Asia Vishay Systems Taiwan (Asia except Vishay Systems China China) No. 5 Binguan Nan Dao Youyi Rd., Hexi District, 15 Fl, No. 86, Sec. 1 Shintal 5 Tianjin China, Code 300061 Sijhih City, Taipei, Taiwan 22102...

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