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Sterling Scale XC780 Operation Manual

High accuracy piece counter
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STERLING SCALE
XC780 HIGH ACCURACY PIECE COUNTER
OPERATION MANUAL

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Summary of Contents for Sterling Scale XC780

  • Page 1 STERLING SCALE XC780 HIGH ACCURACY PIECE COUNTER OPERATION MANUAL...
  • Page 2 rev. V1.1 07/02/91...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS page # Chapter 1 General Information Installation Chapter 2 Keyboard Functions Annunciator Lights Operation Single Scale Operation Multiple Scale Operation Standard Features Operation General Operation Tips for Piece Counting Chapter 3 Parameter Setup Parameter List Calibration Quick Calibration Calibration Setup Static Prevention Chapter 4...
  • Page 4 Sterling Scale reserves the right to make any refinements or changes without notice.

  • Page 5: General Information

    GENERAL INFORMATION The Sterling Scale Model XC780 is a high accuracy piece counter designed for industrial applications. Standard Features include: -High Resolution-1,000,000 internal counts for optimum accuracy -Fast Update Rate-10 times per second -Up to four scale operation -Full keyboard calibration-with fine span digital adjust...
  • Page 6 Counting.

  • Page 7: Installation

    If the built-in scale is used no load cell wiring will be necessary. If an external load cell is connected to the XC780, remove the dust cover and connect the load cell cable to the seven pin load cell input terminal block(P6) as shown in figure 1.
  • Page 8 3. Connect any external printer or computer cables required. Connect the AC/DC adaptor to the input plug in the back of the XC780. clip supplied in the hardware kit may be used to hold the cable in place so it cannot be accidentally removed.
  • Page 9 "Calibration Setup". Note: If the XC780 is to be used in a potentially high static area, such as plastic filling or counting, special precautions MUST be taken. See the...

  • Page 10: Keyboard Functions

    KEYBOARD FUNCTIONS The XC780 keyboard contains 20 switches, 21 annunciator lights, and an 8 digit display. SHIFT used activate upper functions some keyswitches, similar to the way the SHIFT key works on a typewriter. The SHIFT actuated function is the function shown on the upper portion of the key.
  • Page 11 SCALE SELECT is used to select from the various options available for each parameter. (See "Parameter Setup" and "Calibration" for details). The COUNT key is used to enter the piece count mode in the XC780. COUNT: There are several ways to use this key to count parts:...
  • Page 12 [ . ] : The decimal point key is used to enter a decimal point into any numeric entry string. The TIME key is used to enter the time/date mode if your XC780 is TIME: equipped with the time/date option.

  • Page 13: Annunciator Lights

    See "Piece Count Operation" for more details. Reserved for future use. ANNUNCIATOR LIGHTS: The kg lamp is on when the XC780 is displaying weight in kilograms(kg). The g lamp is on when the XC780 is displaying weight in grams(gr). The lb lamp is on when the XC780 is displaying weight in pounds(lb).
  • Page 14 The GROSS lamp is on when the XC780 is displaying the GROSS: gross weight. The NET lamp is on when the XC780 is displaying the net NET: weight. The zero light comes on when the scale is within +/- 1/4 ZERO: graduation of center zero.

  • Page 15: Operation

    If the Time/Date option is installed, the XC780 will return to the same mode it was in when power was interrupted. Allow five minutes to warm up for maximum precision.

  • Page 16: Multiple Scale Operation

    MULTI SCALE OPERATION COUNTING OPERATION: Fixed sample operation: Press the SCALE SELECT key to select the scale you will use to sample parts. Place the fixed number of sample parts on the scale platform and press the COUNT key. The display will show the sample count.
  • Page 17 Note: Storing an average piece weight and tare weight in memory: either or both can be stored depending on the setup of the scale. Count parts using the any method. Enter an ID number 1 to 300 via the keyboard. Press the SHIFT key and then the APW|STORE key.
  • Page 18 Enter the ID number of the part on the keyboard and press the ID key. Count parts using any method. Press the SHIFT key and then press the 7|+ACCUM key to add the displayed quantity to the accumulated quantity. Subtract from Accumulator: Enter the ID number of the part on the keyboard and press the ID key.

  • Page 19: General Operation

    Display Over/Setpoint 2 Value: Press the SHIFT key and then the 3|SP 2 key to display the upper comparator or setpoint 2 value. GENERAL OPERATION Zero the scale: Press the ZERO key. Any weight on the scale is subtracted and the scale will display zero. Display gross weight: While in the COUNT mode, press the SHIFT key and then the 5|GROSS key to temporarily display the gross weight.
  • Page 20 Select a new scale : Press the SCALE SELECT key to switch to the next scale. This button only works if more than one scale is selected in calibration setup.

  • Page 21: Tips For Piece Counting

    Fixed sample counting, APW storage by ID, and barcoding capabilities can greatly increase the speed and efficiency of counting operations. Place the XC780 on a solid surface- In order to achieve the full high resolution capabilities of the XC780, the surface it sets on must not move at all.
  • Page 22 If RESET is pushed when counting to display the weight, you can return to the count mode by simply pressing the APW key. The XC780 remembers the last APW used and recalls that value when the APW key is pressed while in the weight mode.

  • Page 23: Parameter Setup

    The RESET key is used to exit parameter setup. RESET: The J3 jumper on the XC780 logic board is used to lock out entry into the parameter and calibration setup modes. Placing a jumper plug on J3 will lock out entry into the setup modes, removing the jumper enables access.
  • Page 24 *If the "diSAbLEd" message is press the PRINT key to enter parameter setup. displayed, remove the J3 jumper on the 780-001 digital board to enter parameter setup. Step 2: The "SEtuP 01" message will now be displayed. Enter the number of the parameter you wish to modify on the keypad and press the PRINT key.

  • Page 25: Parameter List

    Allows for Scale configuration and initial calibration. This procedure is used when first connecting a new scale platform to the XC780. number of scales in the system, the scale capacities, and the incremental weight(graduation size) of each scale can be configured.
  • Page 26 current scale when the weight is less than 1/5 of one graduation from center zero. This feature allows for correction of zero drift due to load cell drift, temperature changes, or deadload drift(dust, evaporation,etc). Use zero tracking only if counting parts which individually weigh more than 0.2 scale graduations.
  • Page 27 XC780. The XC780 will recompute the APW as pieces are added if: 1) Sample enhancement is enabled.
  • Page 28 Near zero is less than .04% of full scale capacity. Setpoint Output mode Selects the control mode for the setpoint/comparator outputs. Select: oFF - To disable setpoint or comparator operation. The outputs will be in there de-activated state as defined by the "SPA" parameter. CutoF - To select setpoint/cutoff operation.
  • Page 29 StbL - If serial data output occurs continuously when the XC780 is in weigh or count mode, ONLY when the scale weight is stable. Auto - If serial data output is to occur ONCE when the scale net weight exceeds 0.04% of capacity...
  • Page 30 Selects the format used for serial RS-232 data output. Select: - If using standard printer format. See the "RS-232C Output Format" section in the XC780 Technical manual for an example of the standard printer output format. This format requires no operator programming.
  • Page 31 F - Beeper does not sound when a key is pushed. StAtn Station Number Allows a station number to be assigned to the XC780. The station number can be output to a printer or host computer and is required when using the XC780 in a multi-drop communications network.
  • Page 32 is the current transaction serial number. Enter the desired number (0-99999) on the numeric keypad. Enter [0] to reset the serial number. Press the print key to save the new transaction serial number in non-volatile memory.
  • Page 33 "smooth out" displayed reading. The XC780 is a very sensitive instrument, which can be affected by vibration or air currents which cannot be felt be the operator. Increasing digital averaging will stabilize the weight reading if mechanical vibration is present.
  • Page 34 0.4% full scale loading with the smallest size part to be counted. The XC780 must be in weight mode to use single key, fixed sample counting. Sample Enhancement - Sample enhancement is used to automatically correct for inconsistent piece weights.
  • Page 35 When both ID- APW and ID-tare are not selected only the accumulated quantity is stored. Data Output Mode - The output data parameter selects when the XC780 will output data from the RS-232 printer port. NonE disables the output completely.
  • Page 36 Programmable Ticket Format" and Operator Programmable Output Format" sections of the XC780 Technical manual for details. bEEPer Enable - The beeper control turns the XC780 beeper on and off. Turn off the beeper to conserve battery power or operate quietly.
  • Page 37 Serial Number - The serial number feature allows a serial number to be entered which then output using operator programmable output formats. Each time data output, serial number automatically incremented by one to allow tracking of parts or tickets. To enter the serial number: Step 1: Select "Serno...

  • Page 38: Calibration

    The RESET key is used to exit calibration. RESET: The J3 jumper on the XC780 logic board is used to lock out entry into the parameter and calibration setup modes. Placing a jumper plug on J3 will lock out entry into the setup modes, removing the jumper enables access.
  • Page 39 Step 6: In a few seconds, when motion clears, the "EntEr Lb", "EntEr kg", or "EntEr gr" message will be displayed and the XC780 will beep twice.(The units used for calibration are entered using the Calibration Setup parameter (SETUP 01)).
  • Page 40 NOTE: When using Fine Span Digital Adjust, be sure that the error noticed is SPAN error. Inaccurate test weights, zero shift, or platform problems may appear as span error. Correcting for these types of errors with fine span digital adjust can actually induce larger errors. To enter a Fine Span digital adjust correction: Step 1.

  • Page 41: Calibration Setup

    Calibration Setup: Calibration Setup is used whenever a new scale is connected to the XC780. All parameters controlling calibration are configured during calibration setup. Calibration in this mode takes approximately two minutes. Be sure you have an accurate calibration weight of at least 25% of full scale capacity and do not cause motion in the area of the XC780 during calibration.
  • Page 42 XC780 will beep twice. Step 11: Enter the weight to be used for calibration on the numeric keypad and press the PRINT key. The "StEP2 32" message will be displayed with the value counting down. When the optimum step 2 value is reached(not necessarily 0), the display will exit scale 1 and proceed to the next scale if selected.
  • Page 43 1st Scale Capacity will be automatically displayed(10,000 to 15,000 displayed graduations). Other values may be selected but the XC780 will reject any entered data requiring greater than 50,000 displayed graduations. The graduation size is the minimum displayed weight change.
  • Page 44 The units selected here effect only calibration entries.To select displayed units see Parameter Setup. XC780 can be calibrated with one unit type and display another. Select: Lb - Calibration weights are in pounds(lb) Kg - Calibration weights are in...

  • Page 45: Static Prevention

    The XC780 was tested to withstand 25,000 Volts ESD non-destructive and 15,000 volts ESD non-disruptive. Line transient tests have also been performed on the XC780 using the standard IEEE 587 line transient standard category A(8 usec x 20 usec pulse).
  • Page 46 This type of device is used in critical applications where the instrument cannot be allowed to shut down, even if the power does. The XC780 Battery Operation option provides a similar function. Selecting the right power protection components for your application requires careful consideration.
  • Page 47 The best way to protect the XC780 from excessive static is to provide a SHORT, THICK GROUND line directly from the XC780 enclosure to earth ground. The best earth ground point is a copper grounding rod driven directly into the earth next to the instrument.
  • Page 48 ERROR MESSAGES When the XC780 is powered up, it executes a built in self test. Any errors found will displayed on the main display. Incorrectly entered data, calibration problems, and incorrect sequence of operation will also cause error messages to appear.
  • Page 49 EE rE Non-volatile Memory Read Error - Consult factory representative if this error occurs. rA Err RAM Memory Error - Consult factory representative if this error occurs. Error __ Communications Error - Check use of Ready/Busy line and consult factory representative.
  • Page 50 JUMPER SETTINGS Digital board(780-001): Backlight no jumper Backlight off 1 -> 2 Backlight on Parameter no jumper Unlock parameters Lock 1 -> 2 Lock parameters Expansion BUS no jumper Expansion BUS activated 1 -> 2 Expansion BUS de-activated Interrupt 1 -> 2 Expansion BUS interrupt enabled Control 2 ->...

  • Page 51: Glossary Of Terms

    GLOSSARY OF TERMS Accumulation - The process of adding the current displayed value to a saved total value in memory. Accuracy - The measure of closeness of a reading to a known good value. Average Piece Weight(APW) - The average weight of one(1) part used while counting.
  • Page 52 Parity - An error detection method used for serial communication. Platter - The area of the scale where the weight is applied. Remote Scale - A scale base not internal to the XC780, but connected to it. Resolution - the smallest change in weight that the scale can distinguish.

  • Page 53: Specifications

    SPECIFICATIONS Physical: Dimensions - 12.375" wide x 16.55" deep x 3.5" high Weight - 18 lbs (20 lbs w/ battery option) Shipping Weight - 22 lbs (24 lbs w/ battery option) Operating Temperature Range - 0 deg C(32 F) to 40 deg C(104 F) Maximum Humidity - 85% non-condensing Power Requirement - 115 vac, 60 Hz, .25 amp, single phase Static Protection - 25,000 volts, 801.2 human body model...

  • Page 54: Warranty

    This warranty DOES NOT apply if: 1. The XC780 has been repaired or modified by anyone other than Sterling Scale if in their judgement such repair or modification has detrimentally effected the performance or reliability of the product.

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