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Summary of Contents for Pennsylvania Scale Company 7700
- Page 1 Pennsylvania Scale Company Model 7700 Scale Calibration Manual Pennsylvania Scale Company 1042 New Holland Avenue Lancaster PA 17601 For online interactive tech support or more information on Pennsylvania Scale products, visit our website at www.pascale.com Revised September 3, 2002...
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Page 2: Introduction
Pennsylvania Scale Model 7700 Checkweighing Scale The 7700 can be calibrated from the front keypad, or through the RS-232 Interface. The scale employs a digital calibration technique that makes it very versatile when matching the scale to the requirements at hand. -
Page 3: 7700 Series Calibration
7700 SERIES CALIBRATION The calibration of the 7700 is divided into six major categories. The entry point to each of these categories are the calibration steps that are evenly divisible by ten. CALIBRATION CATEGORIES (20) = Program Operational Features Full capacity, resolution, zero range, zero tracking, enable weighing units, print condition, Canadian compatibility. -
Page 4: Data Entry Keys
DATA ENTRY KEYS Before attempting to calibrate the 7700 scale a thorough understanding of how to enter data into the scale is necessary. When the scale is put into the program or calibration modes, the buttons become redefined as follows:... -
Page 5: Calibration Procedure
CALIBRATION PROCEDURE To begin calibration: The calibration mode is entered by pressing the calibration button on the main circuit board. To access the main circuit board, remove the screws holding the tower backplate in place and lower the backplate. The main circuit board is mounted to the backplate and the location of the calibration button is shown below. -
Page 6: Calibration Steps
CALIBRATION STEPS STEP DESCRIPTION (* = Default Values) CAL 20 Manual Calibration Entry Point Press ZERO/ENTER button UnS 21 Primary Weighing Unit Use the UNITS button to select between “lb” or “unit”. (“unit” is a unit of measure used by the paint mixing industry, if “unit” is selected in step 21 the fourth unit selection will be disabled, since “lb/oz”... - Page 7 CALIBRATION STEPS (cont’d.) En4 26 Enable Fourth Unit, Pounds/Ounce split display Select Yes or No* by pressing the UNITS button. Press ZERO/ENTER button. Prt 27 Print Select form the table below by pressing the UNITS button: - Stable* Print only on stable - First Auto Print on first stable non-zero weight - Accept...
- Page 8 CALIBRATION STEPS (cont’d.) HLF 43 Half Capacity Apply half load and press ZERO/ENTER button. If a 1/2 capacity weight is not available, place a substitute weight on the platform, key in the amount of weight being used and press ZERO/ENTER. If creep correction is desired, wait sixty seconds between placing the weight on the platform and pressing the ZERO/ENTER button.
- Page 9 CALIBRATION STEPS (cont’d.) bau 61 Baud Rate Select a baud rate from the table below by pressing the UNITS button. 300 baud* 2400 baud 19200 baud 600 baud 4800 baud 1200 baud 9600 baud Press ZERO/ENTER button. LEn 62 Word Length Select either 7* bit or 8 bit word length by pressing the UNITS button.
- Page 10 CALIBRATION STEPS (cont’d.) Stf 71 Set Time Flag Select type of clock from the table below: Skip steps 72 &73 Military Time 12 hour clock, currently AM 12 hour clock, currently PM Press the ZERO/ENTER button. td1 72 Time Enter the current time as HHMMSS, All digits must be entered (leading zeros not required) Press the ZERO/ENTER button.
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Page 11: Building Formatted Print
BUILDING A FORMATTED PRINT The user defined formatted print is the string of information sent from the RS-232 port when the PRINT button is pressed, or the scale receives an SRP command from a computer or terminal. The user selects the format of this string by entering two digit print codes into the 20 available print slots, PSL 81 through PSL 100. -
Page 12: Example Of Formatted Print
EXAMPLE OF BUILDING A FORMATTED PRINT To build a simple formatted print that could be sent to a ticket printer the following print codes could be entered: PSL 81 - 65 (This is a carriage return and line feed.) PSL 82 - 30 (Prints the gross weight with prefix and suffix.) PSL 83 - 65 (Sends another carriage return and line feed.) PSL 84 - 32 (Prints the net weight with prefix and suffix.) PSL 85 - 65 (Sends a carriage return and line feed.) -
Page 13: Formatted Print Codes
FORMATTED PRINT CODES Print Prefix and Suffix Formatted Print Codes 02 = Current Time 03 = Current Date 04 = Current weighing unit suffix label 05 = "GROSS" prefix label 06 = "TARGET" prefix label 07 = "NET" prefix label 08 = "UNDER"... - Page 14 FORMATTED PRINT CODES (cont’d.) Continuous Output Print Codes 50 = Continuous output (Formatted print will be sent continuously as long as scale is turned on.) 51 = Toggled continuous output (The formatted print will be sent continuously after the PRINT button is pressed or an SRP command is received by the scale.
- Page 15 FORMATTED PRINT CODES (cont’d.) Formatted Print Codes 0 = Exits building of formatted print without loss of previously entered print codes 91-98 = Repeat Codes (repeats previous entry 1 to 8 times.) 99 = Marks the end of the formatted print CAL 0 Exit Calibration Re-install the rest of the screws into the backplate, the scale is now ready for operation.
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Page 16: Table Of Contents
SECTION 2 - PROGRAMMING/CALIBRATION CONTENTS INTRODUCTION --------------------------------------- 7700 SERIES CALIBRATION ------------------------ DATA ENTRY KEYS ---------------------------------- CALIBRATION PROCEDURE ----------------------- TO BEGIN CALIBRATION ---------------------- CALIBRATIONS STEPS ------------------------- BUILDING FORMATTED PRINT ------------- EXAMPLE OF FORMATTED PRINT --------- FORMATTED PRINT CODES --------------------- 12...
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