Cardinal 748 Technical/Operation Manual
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Cardinal 748 Technical/Operation Manual

Weight indicating instrument
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Cardinal
Cardinal Scale Manufacturing Co.
748
WEIGHT INDICATING INSTRUMENT
TECHNICAL/OPERATION MANUAL
P.O. Box 151
Webb City, MO 64870
8539-M041-O1 Rev H
PHONE: 417-673-4631
11/98
FAX: 417-673-5001
Printed in USA

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  • Page 1 Cardinal Cardinal Scale Manufacturing Co. WEIGHT INDICATING INSTRUMENT TECHNICAL/OPERATION MANUAL P.O. Box 151 Webb City, MO 64870 8539-M041-O1 Rev H PHONE: 417-673-4631 11/98 FAX: 417-673-5001 Printed in USA...

  • Page 2: Specifications

    SPECIFICATIONS Power Requirements ..115 VAC 60 Hz @ 0.07A (optional 230 VAC 50/60 Hz @ 0.03A) powering 12-18 VDC, 300-800 mA, wall plug-in UL/CSA listed power supply. Enclosure Size ....Desk Top: 11.3"W x 6.5"H x 3"D NEMA 4X: 13.5"W x 8.6"H x 4.6"D Operating Environment ..

  • Page 3: Installation

    1 - wall mounting bolt layout The 748 desktop enclosure may be mounted on a desktop or other smooth, flat, horizontal surface or may be mounted on a wall. Refer to figure no. 1 for a layout of wall-mounting bolts. Regardless of the manner in which the instrument is installed, the location should be free from temperature extremes and water.

  • Page 4: Pin Number

    All of the terminations to the desktop enclosure 18 VCD version of the 748 are 0.8 A REMOTE INPUT BCD OUTPUT ANALOG OUTPUT made on the rear panel SERIAL I/O LOAD CELL PWC OUTPUT PRINTER OUTPUT via “D” style connectors.
  • Page 5 19 .... GROUND be used for various functions. It will accept serial commands* 2 ..... Tx D allowing the 748 to be controlled remotely. Figure no. 6 3 ..... Rx D illustrates the pin layout for this connector. 11 .... Tx D RETURN * See SERIAL INPUT COMMANDS section for details.

  • Page 6: Load Cell Connection

    NEMA 4X ENCLOSURES For desk mounting of the 748 in the NEMA 4X enclosure, it is necessary to order separately a “DESK-MOUNT” kit. Refer to Assembly Instruction for Desk-Mount Kit (8539-M097-O1) for mounting instructions. The Model 748 in a NEMA 4X enclosure is normally mounted on the wall or some other vertical surface.

  • Page 7: Preset Weight Comparator

    RB8: 8 Relay Assembly OUTPUT (closed) ..28-240VAC @ 3A maximum for each plug-in relay. CONTROL INPUT ..5VDC @ 12mA from the 748 NEMA 4X main pc board assembly P11 or the desktop PWC OUTPUT connector. CONNECTION .... Removable plug-in screw terminals for up to 14 AWG wire.
  • Page 8 3.0A MAX Blue LOAD OPEN 3.0A MAX Violet Green White GROUND Gray 8539-C062-0A PWC Relay Board figure no. 10 - 748 NEMA 4X enclosure layout Serial PWC Output I/O Cable Cable Printer Cable Calibration Switch Load Cell Cable Load Cell Power...
  • Page 9 1200, 2400, 4800, 9600 and 19.2K baud are supported. RECORD FORMAT The information transmitted from the printer output port depends on the operation mode of the 748 at the time the PRINT key is pressed as well as the print format entered. Refer to the CALIBRATION section of this manual for additional information on the programming of the printer output format.

  • Page 10: Continuous Data Output

    - weight with leading zeros space WEIGHT ON DEMAND If the bi-directional serial has not been setup for continuous output, the 748 will respond to a weight request (ENQ). The host device (computer) sends: (hex 05) The 748 will respond: Sxxxxxx^UU^M^CC^CR - if no decimal point in weight display.
  • Page 11 (0Dhex) SERIAL INPUT COMMANDS The second serial port on the 748 is a bi-directional port and can both receive and transmit serial data. It is possible to control the operation of the 748 by transmitting serial commands to the instrument via this serial port.
  • Page 12 Hex Format to Transmit - 2H 34H 33H 34H 3H Equivalent Computer or Terminal Keys to press - Ctrl B 4 3 4 Ctrl C KeyCommand Equivalent Keyboard Key - TARE Function - Enter a Tare weight value Serial Command Format - STX5xxxxxxCKsumETX (xxxxxx = the tare weight value) Hex Format to Transmit...

  • Page 13: Checksum Calculation

    HEX ChecKsum value. RESPONSES TO SERIAL COMMAND FUNCTIONS The 748 will respond to every serial command received. The format will serve to indicate the manner in which the serial command was processed. The general format for the response to a serial...

  • Page 14: Setup And Calibration

    Your 748 indicator has been thoroughly tested and calibrated before being shipped to you. If you received the indicator attached to a scale, calibration is not necessary. If the 748 is being connected to a scale for the first time or recalibration is necessary for other reasons, proceed as indicated.
  • Page 15 CAUTION: When using the dual ranging feature of the 748, do not attempt to use a division value in the low range that is too small to provide adequate signal strength for stable operation of the instrument. Most scale installations will allow the smaller division to be 1/2 of the larger division value when the dual range feature is used.
  • Page 16 HIGH DECIMAL POINT Press to show the current setting. Press through Hi dP ENTER to enter the desired decimal point location and press to save it or to save the current setting. Must be the ENTER same as Low Decimal Point to be able to use Truck Storage. 0=XXXXXX 2=XXXX.XX 4=XX.XXXX 1=XXXXX.X 3=XXX.XXX HIGH CAPACITY...
  • Page 17 Press ENTER after making your selection. If NO is selected, the 748 will advance to the ZERO TRACKING RANGE. “C” NUMBERS Press to show the current value of the C1 number. If...
  • Page 18 * If any components have been changed that affect calibration and your scale is used in a commercial application and must be “Legal for Trade” you cannot use “C” numbers to re-calibrate. BAR GRAPH ENABLE/DISABLE Press to show the current settting. Press ENTER bAr= to enter the new setting and press...
  • Page 19 F YOU SELECTED LEVEL 3 FILTERING THEN: Press to show the current filter setting. Press ENTER through to enter the new filter value (1 to 16). The larger the number, the greater the effect. Then press ENTER to save it or to retain the current setting. Filter is the number of weigh samples that will be averaged before being displayed.
  • Page 20 SLEEP MODE (Battery Operation Only - see SETUP REVIEW) ENTER Press to show the current setting. Press through SLP= ENTER to enter the new setting. Then press to save it or to save the current setting. Weight applied to scale, or key pressed, will enable system operation.
  • Page 21 If you do not ENTER want to change or review the configuration of the serial port settings, press for NO then press to continue. If you bypass this section, the 748 will ENTER advance to the PRINTER TAB SETTINGS. SERIAL PORT BAUD RATE Press to show the current baud rate.
  • Page 22 CONTINUOUS SERIAL OUTPUT Press to show the current setting. Press ENTER ContS= to disable or enable the continuous output on the bi-directional serial port. Then press to save it or ENTER to save the current setting. A NO response will automatically select weight on demand.
  • Page 23 PRINTER PORT DATA BITS Press to show the current number of data bits. Press ENTER bitSP= to enter the new number of data bits for the printer serial port. Then press to save it or to save the ENTER current setting. PRINTER PORT STOP BITS Press to show the current number of stop bits.
  • Page 24 PRINTER TAB SETTINGS and the display will show no. If you wish to Press ENTER tAbS? program or review the location of the printed data on the key to change the display to YES. ticket, press the Otherwise leave the display at no and press the key to bypass these ENTER settings.
  • Page 25 TIME PRINT LOCATION This display shows the current setting for the location of C=1.01 the time (clock) printing. Use the numeric keys to enter the new location then press to save it or to save the ENTER current setting. DATE PRINT LOCATION This display shows the current position for printing of the d=2.01 date.
  • Page 26 The display will show all four (4) calibration or “C” numbers. Each number may be up to three (3) digits in length. By recording these numbers you will be able to return the 748 to its present calibration settings without using test weights...

  • Page 27: Fine Span Adjustment

    CALIBRATION “C” NUMBERS OR CALDAC (cont) your scale is used in a commercial application for buying or selling, you may not use the “C” numbers. The “C” numbers may be reviewed during normal operation by pressing the key. TEST CALIBRATION/SETUP COMPLETED The indicator will return to the first calibration prompt, duAL r?.
  • Page 28 SETUP AND CALIBRATION BEGIN 1. Press OFF key FLt= 2. Set the calibration switch to the CAL position filtering? 3. Press the ON/ZERO key dual dUAL ranging? 0 = no filtering 3 = custom 1 = minimal filtering filtering lo range 2 = moderate filtering yes = 1 key interval...
  • Page 29 continued from previous page PrtYS= time bi-directional yy.xx location port parity page 00.00 = disable 0 = none 1 = odd 2 = even printed data date yy.xx bitSS= no. of location yy = line no. data bits xx = no. of 00.00 = disable spaces 7 or 8...

  • Page 30: Setup Review

    Tare Weight Net Weight To enable the Setup Review feature, first turn the 748 off by pressing the OFF key. Press and hold the GROSS key and press and release the ON/ZERO key. Release the GROSS key. The 748 will respond by showing the prompt for the selection of power-up zeroing (PUO=).
  • Page 31 SETUP REVIEW 1. Press OFF key 2. Press and hold the F1 key 3. Press the ON/ZERO key PrtYS= bi-directional port parity 0 = none 1 = odd 2 = even PU0= re-zero on power up bitSS= no. of 0 = no 1 = yes data bits UnSt= 7 or 8...
  • Page 32 Continued from previous page tAbS? page printed data yy = line no. Truck Storage = yes xx = no. of spaces Truck Storage = no Temporary Truck First Printing time yy.xx location time yy.xx location 00.00 = disable date yy.xx 00.00 = disable location date...

  • Page 33: Keypad Functions

    Damage to keyboard resulting from this practice will NOT be covered under warranty. ON-ZERO KEY This key performs two (2) functions. Pressing it when the 748 is off will apply power to ZERO the instrument. Pressing it when the 748 is on will cause an immediate zeroing of the weight display up to the selected limit of 4% or 100% of the scale’s capacity.
  • Page 34 If the weight is correct, press the ENTER key, otherwise use the numeric keys to enter the new value of stop weights and press the ENTER key. The 748 will now resume normal operation using the new start and stop weight values for the bar graph display. Note that when the displayed weight equals the start weight, the left most bar graph element will turn on.
  • Page 35 With pounds displayed ( lb annunciator turned on) pressing this key will change the weight units to kilograms and the kg annunciator will be turned on. Note that this feature must be enabled during setup of the 748. PRESET KEY This key performs two (2) functions.
  • Page 36 Note that annunciators are turned on to indicate that the display is in the mode corresponding to the annunciator label and that the annunciators flash on and off to indicate that the 748 is waiting for an input from the keyboard for the mode indicated by the flashing annunciator.
  • Page 37 Preset weight comparator value less its Trim weight value. TRUCK STORAGE OPERATION Note that the truck storage feature must have been enabled during setup and calibration of the 748 to be operational. If it was not enabled the following functions CANNOT be performed. NOTE: The truck storage is disabled if the Dual Ranging Feature has been selected and the decimal point setting for the High Interval differs from the decimal point setting for the Low Interval.
  • Page 38 3. A ticket containing the stored weight and accumulated weight along with the ID number will be printed. 4. If the ID number entered does not exist, the display will flash ErrorOr and the 748 will return to normal operation.

  • Page 39: Error Codes

    ID number, it is processed in the same manner: Press ID, key-in ID number, press PRINT. ERROR CODES The 748 is equipped with software that indicates when an error in the operation takes place. The following lists the error code displays supported by the 748 along with their meaning. Should you encounter an error display, please refer to this list for the cause.
  • Page 40 Internal RAM failure. CORRECTIVE ACTION: consult your scale serviceman. Err r The RAM test has detected one or more failures in the external 748 RAM memory. CORRECTIVE ACTION: consult your scale serviceman. No battery-backed RAM. The time and date, zero dead load, DAC no bbr output calibration, and truck file data has been lost.

  • Page 41: Care And Cleaning

    CARE AND CLEANING 1. DO NOT submerge indicator in water, pour or spray water directly on instrument. 2. DO NOT use acetone, thinner, or other volatile solvents for cleaning. 3. DO NOT expose equipment to temperature extremes. 4. DO NOT place equipment in front of heating/cooling vents. 5.

  • Page 42: Optically Isolated Inputs

    Calibration mode by gaining access to the calibration switch. Refer to the CALIBRATION section of this manual for additional information. When the 748 senses that the optional I/O board is present, it will cause the calibration sequence to include the steps necessary to calibrate the analog output.
  • Page 43 4 mA. Adjust the OFFSET potentiometer on the I/O board to set the voltage output to zero and/or the current output to 4 milliamperes. On completion, press ENTER. Step 7 The 748 will return to Step 1. NOTE: Because of interaction between the OFFSET and SPAN adjustments, answer YES to Step 1 and repeat calibration until no further adjustment is necessary.

  • Page 44: Appendix B - Part Identification

    Gimbal 8539-D094-EA Main PC Board (LCD) 6540-1052 Knob 8539-D094-FA Main PC Board (LED) 6021-1199 Thumbscrew 8539-C012-0A 748 Option Board 6024-0083 Rubber Washer 8539-C017-0A Cable: Duplex Serial 8539-B020-0A Cable: Analog Output 8539-B015-0A Cable: Power Connector 8539-B021-0A Cable: Remote Input 8539-B104-0A Cable: Printer...
  • Page 45 8539-D094-DA Main PC Board (LED) 8539-C066-0A 4 PWC Relay Assy 8539-D003-08 Keypad (LCD) 8539-C067-0A 8 PWC Relay Assy 8539-D003-18 Keypad (LED) 8539-C062-0A Relay Board Assy 8539-C012-0A 748 Option Board 8534-D390-08 Mounting Bracket 6021-0623 Screw, 6-32 x .75 6024-0081 Washer, Rubber 6680-0004...
  • Page 46 APPENDIX C CALIBRATION SEAL INSTALLATION If your Model 748 Weight Indicating Instrument is used in a commercial application it must be tested and sealed by your local weights and measurements official. The 748 is designed to accept a lead and wire security seal to prevent unauthorized access to the calibration adjustments. Installation of this seal differs with the type of enclosure.

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