NCI 7800 User Manual
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NCI 7800 User Manual

Weight classifiers
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Model
7800
Family
Weight
Classifiers
User's
Manual
7820
7885
7840
7880
7829
7824

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Summary of Contents for NCI 7800

  • Page 1 7820 Model 7880 7800 Family Weight Classifiers 7885 7829 7840 User’s Manual 7824...
  • Page 2 Risk of electrical shock. Do not remove cover. No user serviceable parts inside. Refer servicing to qualified service personnel. Weigh-Tronix reserves the right to change specifications at any time. 10/10/05 7800_U.P65 PN 7424-15170i e2 Printed in USA Model 7800 Family Weight Classifiers User’s Manual...

  • Page 3: Table Of Contents

    Configuration Mode ............20 Calibration Mode ..............24 Gravity Mode ..............27 Re-Calibration Mode ............28 Review/Test Scale Settings ..........29 Communication ..............31 Error Codes ................ 34 Troubleshooting ..............35 Spare Parts Listing ............. 37 Model 7800 Family Weight Classifiers User’s Manual...

  • Page 4: Specifications

    Specifications The NCI 7800 models are digital electronic parcel Description bench scales specifically designed for shipping applications and are Legal-for-Trade. The scales have built-in intelligence that enables them to be easily interfaced with a computer or other data- processing device.
  • Page 5 7885 (remote only) Key panel with ZERO and TEST keys. Optional remote display with 7 ft. cable. Level bubble located under weigh platter. Adjust- Scale Leveling able feet in each corner to level the scale. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 6 The scale has 100,000 internal counts. Dynamic Response The time from when weight is applied to the scale until a stable weight display is displayed: 0–1000d 1.5 seconds 1000d+ 2.0 seconds maximum mean average Model 7800 Family Weight Classifiers User’s Manual...

  • Page 7: Initial Setup

    Be sure the scale platter does not touch any adjacent surfaces. 2. To install the scale surface flush with a countertop, use the dimensions on the following page to guide construction. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 8 4. Make sure all power cords, remote display cables, etc., are not touching the live weigh- ing surface. 5. Plug the unit into an appropriate voltage outlet that is properly grounded. Model 7800 Family Weight Classifiers User’s Manual...

  • Page 9: Operation

    “- - - -” If necessary, reapply Remove the item from the scale platter. power to reset the initial zero setting. Refer to the Trouble- shooting section if the problem persists. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 10 CREASE key in the Gravity Mode. 7885 or Optional Remote Display All NCI 7800 bench scales, except the 7885, can have an optional remote display. If a remote display with keyboard is used, then Switch 3 (shown in Figure 1) determines which display keyboard is funcitional.
  • Page 11 The 7800 models power up ready for weighing Accessing the operations. Access the Menu mode by setting Menu Mode Switch 1 shown in Figure 1 or 2 to the OPEN or Menu mode position. Access the Gravity setting mode by setting...
  • Page 12 With Switch 2 in the Gravity Mode or OPEN Gravity Mode position, you may increase the local gravity value by pressing the ZERO key, or decrease the value by pressing the TEST key. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 13 Figure 3 Menu Structure Model 7800 Family Weight Classifiers User’s Manual...
  • Page 14 The NCI 7800 bench scales allow calibration Alternative Calibration using less than full capacity weights. See Table 1 Points for alternative weights that can be used to calibrate your scale for its designated capacity. Table 1 Alternative Capacity Calibration Weights...

  • Page 15: Diagnostics Mode

    100,000 counts of displayed this special mode or resolution. AZT is disabled. power reset the scale. Areas to view current configuration settings are: Filter, Protocol, Baud, Capacity, Type, Units, Prtout and Gravity Setting. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 16 7. Press the TEST key to perform the ROM test... PASS or FAIL is displayed briefly; then 8. Press the ZERO key... I/O is displayed. This stands for the INPUT/OUTPUT test. . Model 7800 Family Weight Classifiers User’s Manual...
  • Page 17 FILT is displayed. This stands for filter- menu to verify the ing. settings, but to make changes, you must 17. Press the TEST key... enter configuration or calibration. The current filter setting, FAST or SLO, is displayed. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 18 25. Press the TEST key... The current rounding type, SCALE for standard rounding or CLASS for classi- fier rounding, is displayed. 26. Press the ZERO key... UNITS is displayed. This stands for unit- of-measure. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 19 34. When you are finished, press the ZERO key, until DONE is displayed, then press the TEST key to return to the top menu level... DIAG is displayed. Or close Switch 1 to return to normal weigh- ing mode. Model 7800 Family Weight Classifiers User’s Manual...

  • Page 20: Configuration Mode

    1. From the DIAG display, press the ZERO key until CONF is displayed, or from the normal weighing mode, move Switch 1 to the Menu ode or the OPEN position; then press the ZERO key until CONF is displayed. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 21 When the choice you want is available autoprint and displayed, press the TEST key... manual print modes of operation. The choice is accepted and the display shows PROT. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 22 <CR> ..Represents the carriage return character (ØD hex) 14. When finished configuring your scale, press the ZERO key until DONE is displayed; then press the TEST keys, or close Switch 1 to return to the normal weighing mode. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 23 TEST button can also be utilized for a remote push button to initiate the manual send se- quence. Model 7800 Family Weight Classifiers User’s Manual...

  • Page 24: Calibration Mode

    SCALE or CLASS – Selectable only when calibrated in LBS (lb) mode. Selection of SCALE rounds weight at 0.5 divisions. Selection of CLASS sets device up as a weight classifier rounding at 0.9 divisions. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 25 TEST key... That choice is accepted and a scale capacity is displayed. Example: 100.02 If a different capacity selection is desired, press the ZERO key to scroll through the choices. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 26 DIAG is displayed, or return Switch 1 to the closed position. The scale returns to normal weighing mode. The scale is now tested, configured, and cali- brated. It is ready for use in your application. Model 7800 Family Weight Classifiers User’s Manual...

  • Page 27: Gravity Mode

    .0002. When the correct value is displayed, simply return Switch 2 to the CLOSED position. The scale will now use this new relationship between calibration and local gravity for its weight calculations. Model 7800 Family Weight Classifiers User’s Manual...

  • Page 28: Re-Calibration Mode

    5. When the choice you want is displayed, press the TEST key. 6. To change the capacity/resolution, press the ZERO key until RESO is displayed. 7. Press the TEST key. The current capacity/ resolution setting is displayed. Model 7800 Family Weight Classifiers User’s Manual...

  • Page 29: Review/Test Scale Settings

    To review the current system settings, press and hold the TEST key until the display shows, “ - - - - - - - - “. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 30 When finished running tests or viewing the settings, press the ZERO key until DONE is displayed. Then press the TEST key to return to normal (i.e., weighing) mode of operation. Model 7800 Family Weight Classifiers User’s Manual...

  • Page 31: Communication

    Communication The NCI 7800 family scales come factory config- ured as a serial RS-232 interface device. There is one 9-pin DE type female connector accessible at the rear of the unit. The functional pinout of this connector is compatible with a standard PC with a pass through cable.
  • Page 32 Standard Commands Scale Response <LF>xxxx.xxuu<CR> <LF>hh<CR><ETX> Results Returns decimal weight with units plus scale status. S<CR> Scale Response <LF>hh<CR><ETX> Results Returns to scale status. Z<CR> Scale Response <LF>hh<CR><ETX> Results Scale is zeroed, returns status. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 33 (div-A) <CR> xxxxxx (div-n) <CR> Results Returns weight normalized to 100,000 division with AZT on/off. Protocol must be set for NCI and the scale must be in the “DIAG” (diagnostics) sub-menu. Otherwise, the scale will respond with the unrecognized command response.

  • Page 34: Error Codes

    The error codes are broken down into two hexadecimal numbers, with each bit defining a single error condition. The error codes are defined as follows: Model 7800 Family Weight Classifiers User’s Manual...

  • Page 35: Troubleshooting

    Display shows unrecognized characters 1. Check software PROM for proper insertion. 2. Check display cables for the proper connec- tion. 3. Replace PROM. 4. Replace the display board. 5. Replace the main board. Model 7800 Family Weight Classifiers User’s Manual...
  • Page 36 1. Check cable connection at both the rear of the scale and the host device. 2. Check communication setting and baud rate on both scale and software. 3. Perform I/O loopback test. Model 7800 Family Weight Classifiers User’s Manual...

  • Page 37: Spare Parts Listing

    7154-16365-100 7885-75 Loadcell 7154-16335-100 7880-125, 150 Loadcell 7154-16365-150 7829-125 Loadcell 7154-16365-150 7840-125, 150 Loadcell 7154-16365-150 7824-125, 150 Loadcell 7154-16365-150 Remote Display Kit 7300-16577-01 7820 Feet 7075-15475-02 7880, 29, 40, 24, 85 Feet 7075-13082 Model 7800 Family Weight Classifiers User’s Manual...
  • Page 38 Notes Model 7800 Family Weight Classifiers User’s Manual...
  • Page 39 Model 7800 Family Weight Classifiers User’s Manual...
  • Page 40 1000 Armstrong Drive Fairmont, MN 56031 Telephone: 507-238-4461 Facsimile: 507-238-4195 E-Mail: service@wt-nci.com www.wt-nci.com...

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