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Measurement Systems MSI-3750 User Manual

Quality industrial weighing and force measurement equipment
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E L E C T R O N I C
DIGITAL WEIGHT
INDICATOR
User
Guide
Quality
Industrial
Weighing
and Force
Measurement
Equipment
Measurement
Systems
International

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Summary of Contents for Measurement Systems MSI-3750

  • Page 1 E L E C T R O N I C User DIGITAL WEIGHT Guide INDICATOR Quality Industrial Weighing and Force Measurement Equipment Measurement Systems International...

  • Page 2: Table Of Contents

    Setup Set Points Menu ........58 Relay Option Board Connections ....143 Set Point 1 Through Set Point 8 ....... 60 The MSI Limited Warranty ......... 144 Using Set Points ..........62 Page 2 MSI-3750 Digital Weight Indicator User Guide...

  • Page 3: Introduction

    I N T E R N A T I O N A L INTRODUCTION The Measurement Systems International MSI 3750 Weigh Meter repre- sents a new level of technology and performance in the Scale Industry. A 16 bit Microcontroller and 20 bit A/D Converter coupled with an alpha- numeric display gives unprecedented versatility and programmability.

  • Page 4: 3750 Front Panel

    TOTAL SETUP ZERO EXIT ENTER TARE ASCII ALPHA NET/GROSS ID # SET POINTS TOTAL VIEW TOTAL UNITS INSERT EXIT SPACE Measurement Systems MSI-3750 International SEATTLE WASHINGTON U.S.A. Alpha-numeric Keys Programable Function Keys Page 4 MSI-3750 Digital Weight Indicator User Guide...

  • Page 5: Features

    • 8 set points standard – programmable for any in-range weight for operator alerts or process control. Optional set point Relay outputs are available for conveyor belt or any other process control. MSI-3750 Digital Weight Indicator User Guide Page 5...

  • Page 6: Batteries (Option)

    The 3750 can be configured to accept a 12V Car battery as a power source. A typical 12V Car battery will provide several weeks of operation before the battery must be recharged. Page 6 MSI-3750 Digital Weight Indicator User Guide...

  • Page 7: Load Cell Hookup

    This ensures even pressure on the O- ring. If you have access to a torque driver, tighten each screw to 3 to 4 in-lb. 10) Install the meter bracket. See drawing at end of manual. MSI-3750 Digital Weight Indicator User Guide Page 7...

  • Page 8: Section 1 - Scale Operation

    LCD. Rules for Use: 1) Make sure power is applied. The power source must have sufficient voltage (depends on power option). 2) Ambient temperature must be between -20°C to +60°C. Page 8 MSI-3750 Digital Weight Indicator User Guide...

  • Page 9: Zero

    Tare value slightly. The Keyboard Tare and Tare Up/Down modes can be disabled through the use of SETUP TARE. In the TARE “AUTO” mode a single push of the key will enact AUTO TARE. MSI-3750 Digital Weight Indicator User Guide Page 9...
  • Page 10 Alternate method: Remove all weight from the scale (Gross Zero). The numeric display will show the TARE weight as a negative number. This method is not as accurate due to the possibility of zero offset. Page 10 MSI-3750 Digital Weight Indicator User Guide...
  • Page 11 Tare Register. The display reads “TARE SET” and displays the Tare value for 1 second. All subsequent readings have the Tare value subtracted and are displayed in “NET” weight. MSI-3750 Digital Weight Indicator User Guide Page 11...
  • Page 12 Multiple Tare Memories The 3750 is capable of storing Tare values through the use of the ID Codes. Each ID code stores an independent Tare. See Section 3 “ID Codes” for more information. Page 12 MSI-3750 Digital Weight Indicator User Guide...

  • Page 13: Setup Tare

    TARE AUTO CLEAR MENU ON TOTAL TARE SETUP MENU ENABLED DISABLED SETUP TARE TARE KEY MODE AUTO CLR ENTER MENU TAREMODE ENTER EXIT ASCII AUTO KBD/UPDN TAREALL ENTER ENABLED DISABLED TAREALL MENU MSI-3750 Digital Weight Indicator User Guide Page 13...
  • Page 14 Push EXIT and try again. TAREMODE ASCII TAREALL 2) Push the scroll key to change the menu to “AUTO CLR”. AUTO ENTER 3) Push ENTER. The first selection is the DISABLED current AUTO CLR mode. Page 14 MSI-3750 Digital Weight Indicator User Guide...
  • Page 15 5) Push ENTER. TAREALL is now enabled ENTER and the 3750 is back in the SETUP TARE TAREALL menu. SETUP EXIT 6) Push to return to normal scale operation (with the TAREALL function ≈ enabled). EXIT MSI-3750 Digital Weight Indicator User Guide Page 15...

  • Page 16: Net/Gross

    “UNITS”. 3750s equipped with the Statistics Option are limited to one functional unit. Statistical Units can be changed only if all the ID Code Totals are Cleared using the “CLEAR ALL TOTALS” procedure in Section 4. Page 16 MSI-3750 Digital Weight Indicator User Guide...

  • Page 17: Setup Units

    √ Pounds will automatically be enabled. OIML units are limited to kg, g, and metric Tons. SETUP 5) When finished selecting units, push EXIT ≈ to return to normal scale operation. EXIT MSI-3750 Digital Weight Indicator User Guide Page 17...

  • Page 18: Peak Hold (Function Key Option)

    Note: Peak Hold captures data at a reading rate of 7.5 times per second. It has a full scale step time constant of approximately 150ms. This function is not suitable for high speed dynamic testing. Page 18 MSI-3750 Digital Weight Indicator User Guide...

  • Page 19: Print

    100 on the digits. The % battery life will message is displayed. vary depending on whether the backlight is on or off. d) Internal tests are performed to further ensure scale integrity. MSI-3750 Digital Weight Indicator User Guide Page 19...

  • Page 20: Section 2 - Function Keys

    Add current weight to the total (Manual Total) or turn Auto TOTL Total On/Off (Auto Total Mode). UNITS Change weight Units. VIEW ∑ Display the Total weight of the current ID Code. Page 20 MSI-3750 Digital Weight Indicator User Guide...
  • Page 21 ASSGN ≈ EXIT 7) Push (SETUP) twice to return to normal scale operation, or assign another Function key using steps 3-6. Some functions are not available on NIST and OIML configured 3750s. MSI-3750 Digital Weight Indicator User Guide Page 21...

  • Page 22: Section 3 - Id Codes

    Print String 2 (20 Char) Total Register Total Counter Total Register 12 Standard ID Codes Display Mode Average Wt Minimum Wt ID CODE NAME Up to 8 Characters Maximum Wt Standard Deviation Coef of Variance Page 22 MSI-3750 Digital Weight Indicator User Guide...
  • Page 23 $ % & ‘ ( ) * +, – . / : ; < = > ? [ \ ] ^ _ ` SPACE Some of the punctuation marks are hard to recognize on the 16 segment display. Use the ASCII chart and the numeric display to verify the identity of the mark. MSI-3750 Digital Weight Indicator User Guide Page 23...

  • Page 24: Using Id Codes

    5) The new ID Code appears briefly on the screen. Next, the 3750 returns to narmal scale operation with tthe new ID Code. Any Tare value and new totals will be stored in the new ID Code. Page 24 MSI-3750 Digital Weight Indicator User Guide...
  • Page 25 9) Push the ABC1 key four times to get a “1” to appear. TEST Note: Alternately the Alpha key could be pressed to numeric mode “n” to input a 1. TEST TEST TEST MSI-3750 Digital Weight Indicator User Guide Page 25...
  • Page 26 ID Code “567” we used in the earlier example. SETUP 3) Push the second and third numbers. Note: So far, no Enter key has been necessary. SETUP Page 26 MSI-3750 Digital Weight Indicator User Guide...
  • Page 27 ID Code. The AARDVARK 3750 returns to normal scale operation with the new ID Code “AARDVARK” (for example) active. Any Tare value and new ENTER totals will be stored in the ID Code “AARDVARK”. MSI-3750 Digital Weight Indicator User Guide Page 27...
  • Page 28 3) Push to delete the ID Code. The previous ID Code is deleted and the next ID Code (alphabetically) will become active. EXIT ENTER Note: Push instead of cancel the ID Code delete. Page 28 MSI-3750 Digital Weight Indicator User Guide...
  • Page 29 3750 returns to the scale mode with the default ID code activated. Memory Full When the 3750s ID Code memory is full this screen appears if you try to enter a new ID Code. MSI-3750 Digital Weight Indicator User Guide Page 29...

  • Page 30: Setup Id Codes

    ID # SETUP NAME ID STRING 2 ID NAME ENTER Enter up to (Usually F1) 20 Char's EXIT STRING 2 ENTER STRING 1 ENTER Enter up to 20 Char's ID STRING 1 Page 30 MSI-3750 Digital Weight Indicator User Guide...
  • Page 31 See “General Alpha-Numeric Character Entry Procedure”. √ ...to finalize edit. NAME EXIT 5) The display reads “ID NAME”. Press SETUP to return to normal weighing mode or press DOWN to reach the next selection.. EXIT MSI-3750 Digital Weight Indicator User Guide Page 31...
  • Page 32 Number Display ENTER mode. DISP ≈ 7) You are back in the SETUP ID# menu. SETUP Return to normal scale operation (in PER CENT) by pushing EXIT ∆ EXIT Page 32 MSI-3750 Digital Weight Indicator User Guide...

  • Page 33: Id Code String 1 & String 2

    The message reads “ID NUMBR” NUMBR ENTER 2) Push ENTER to access the menus. NAME DISP 3) Use the key to find the desired ID Code String (“STRING 1” or “STRING 2”). STRING MSI-3750 Digital Weight Indicator User Guide Page 33...
  • Page 34 ...to input char. editing the String. When finished, push the ENTER ENTER ENTER key twice..to finalize See “General Alpha-Numeric Character Entry Procedure”. edit. Page 34 MSI-3750 Digital Weight Indicator User Guide...

  • Page 35: Section 4 - Total / Statistics

    5) When the total weight exceeds the display capability of 999,999 counts, or the total weighments count exceeds 9999, dashes will appear to reflect a MSI-3750 Digital Weight Indicator User Guide Page 35...

  • Page 36: Auto Total

    2) Weight readings must be greater than the set Total Threshold. 3) Each reading added to total must be preceded by a return to zero (Net or Gross) or below the Total Threshold. Page 36 MSI-3750 Digital Weight Indicator User Guide...

  • Page 37: Total Menu (Setup Total)

    Total Threshold to enable the next totalization. This prevents the same weight from being totaled twice. Another example: On a scale with a capacity of 1000 kg the user desires to Auto MSI-3750 Digital Weight Indicator User Guide Page 37...
  • Page 38 LCD indicates ∑ MODE “AUTONORM”. √ SETUP 5) Push the EXIT key to return to normal scale operation. Auto Total is now enabled. The small “AUTO ∑” annunciator will EXIT appear. Page 38 MSI-3750 Digital Weight Indicator User Guide...
  • Page 39 1000kg and the user wishes all weight above 50kg totaled, enter 5% (1000 x 0.05). 5) After the number is finished push ENTER. SETUP ≈ EXIT 6) Push the key to return to normal EXIT scale operation. MSI-3750 Digital Weight Indicator User Guide Page 39...

  • Page 40: View Total

    F key use that key for the following procedure. To Display the Current ID’s Totaled Weight VIEW TOTAL VIEW TOTAL. The totaled weight Push and the number of weighments will be displayed for 4 seconds. Page 40 MSI-3750 Digital Weight Indicator User Guide...
  • Page 41 If you change your mind, push EXIT to cancel the Clear Total operation or push CLEAR to go back to the “CLRLAST ∑ ” mode. MSI-3750 Digital Weight Indicator User Guide Page 41...

  • Page 42: Clear All Totals

    Statistics are accessed in either of two ways: 1) Program a Function Key to be “STATS”. 2) The statistic registers can be accessed with a computer or terminal through an RS-232 /485 port. Page 42 MSI-3750 Digital Weight Indicator User Guide...

  • Page 43: Definitions And Formulas

    The only way to change units is to clear the registers using the CLEAR ALL TOTALS (SETUP VIEW TOTAL) procedure detailed in the Total Section. Once all the total and statistics registers are cleared, the units can be changed. MSI-3750 Digital Weight Indicator User Guide Page 43...

  • Page 44: Using Statistics

    Note : The STATS key will not function until weight has been totaled in the current ID Code. PRINT 2) With a suitable printer or computer attached to the COMM Port1, push PRINT. Page 44 MSI-3750 Digital Weight Indicator User Guide...
  • Page 45 To Print the Current Product Code’s Total Only VIEW TOTAL VIEW TOTAL (usually F4) followed 1) Push quickly by the PRINT key. Just the Total and the number of samples will print. PRINT MSI-3750 Digital Weight Indicator User Guide Page 45...

  • Page 46: Section 5 - 3750 Meter Setup

    Calibrate menu (under seal, see calibration section), and certain items to be disabled. Any or all menu items can be eliminated under software control (contact factory for details). Page 46 MSI-3750 Digital Weight Indicator User Guide...

  • Page 47: Filter

    ENTER vibration situations. 5) Push ENTER. SETUP SETUP SETUP 6) You are back in the menu. Return to normal scale operation (MEDIUM Filter ≈ EXIT on) by pushing (SETUP). EXIT MSI-3750 Digital Weight Indicator User Guide Page 47...

  • Page 48: Lcd Contrast

    1-8 key. √ EXIT SETUP ENTER 5) Push ENTER.You are back in the SETUP menu. SETUP 6) Return to normal scale operation by SETUP EXIT pushing (SETUP). ≈ EXIT Page 48 MSI-3750 Digital Weight Indicator User Guide...

  • Page 49: Real Time Clock/Calendar

    The 3750 Real Time Clock can also be synched to the second if set through the Comm Port by computer. ENTER 6) When the proper time is displayed, push ≈ ENTER. You are back in the TimeDate menu. MSI-3750 Digital Weight Indicator User Guide Page 49...

  • Page 50: Setup Power Menu

    Depressing any key, or any change in the detected weight will reset the time limit . This feature defaults to the disabled mode when initially calibrated. When disabled the scale will stay Page 50 MSI-3750 Digital Weight Indicator User Guide...

  • Page 51: Lcd Backlight

    The Fiber-Optic LED Backlight has three brightness settings. On battery powered units, use “LOW” to maximize battery life in low light situations. This feature is not available on units equipted with two Comm Ports. MSI-3750 Digital Weight Indicator User Guide Page 51...

  • Page 52: Bargraph Menu

    3) DISABLED – Turns off the Bargraph. The 3750 defaults to the DISABLED setting of the Bargraph. The following procedure shows how to set up the Bargraph for PER CENT operation. Page 52 MSI-3750 Digital Weight Indicator User Guide...
  • Page 53 10lb (or whatever SPACE ∆ units the scale is in) as 0%. ENTER 8) Push ENTER. 9) Use the key to scroll to the the 100% “BAR 100%” selection. ENTER WEIGHT 10) Push ENTER. MSI-3750 Digital Weight Indicator User Guide Page 53...

  • Page 54: Lock

    Fx keys if no key is assigned to that function (e.g. PEAKHOLD). See “FUNCTION KEYS” for details on programming the Function Keys. Page 54 MSI-3750 Digital Weight Indicator User Guide...
  • Page 55 ENTER the item is locked (Loc) or unlocked (UnLoc). DOWN 4) Use the keys to scroll through the list. Use the LEFT RIGHT cursor keys to toggle between locked and √ EXIT MSI-3750 Digital Weight Indicator User Guide Page 55...
  • Page 56 ENTER ENTER 4) Push to lock the 3750. LOCKED √ EXIT 5) Push to return to normal scale SETUP operation. The LCD message reads “LOCKED” whenever a locked function is tried. EXIT Page 56 MSI-3750 Digital Weight Indicator User Guide...
  • Page 57 If the lock code is lost, the calibration seal must be broken to reset and unlock the 3750. Follow the “RESET ALL” procedure then WARNING perform a complete calibration. MSI Service personnel can provide an unlock code if you are unable to recalibrate. MSI-3750 Digital Weight Indicator User Guide Page 57...

  • Page 58: Section 6 - Set Points

    ENTER A or b SET PT 2 WEIGHT MODE MENU A Ad b ALL SET POINTS SET PT 1 TOTAL MODE MENU NETGROSS ENTER SP MODE GROSS ENTER DISABLED EXIT GRADING NORMAL Page 58 MSI-3750 Digital Weight Indicator User Guide...
  • Page 59 You are now back in the “SETUP SET ENTER POINTS” menu. Use the UP/DOWN keys √ to select the next set point menu or push EXIT to return to normal scale operation. MSI-3750 Digital Weight Indicator User Guide Page 59...

  • Page 60: Set Point 1 Through Set Point 8

    Gross Weight regardless of any tare value. This is the mode to use for Safety warnings. 2) NETGROSS – If the set point should operate relative to a tared weight, use Page 60 MSI-3750 Digital Weight Indicator User Guide...
  • Page 61 In certain situations, without dead zone, the set point will respond to small weight fluctuations. This can cause the set point relay to turn on and off rapidly, possibly damaging a MSI-3750 Digital Weight Indicator User Guide Page 61...

  • Page 62: Using Set Points

    “VALUE” menu. GREATER 5) Push ENTER. LESSTHAN ≈ 6) For a set point that will switch on when the weight is greater than or equal to the value Page 62 MSI-3750 Digital Weight Indicator User Guide...
  • Page 63 Now other parameters for set points DELAY can be entered. 12) This step is optional, skip to step 16 if a time delay is not needed. Push the to the “DELAY” menu. MSI-3750 Digital Weight Indicator User Guide Page 63...
  • Page 64 DOWN key to move to the “DISPLAY” EXIT menu. ENTER 22) Push ENTER.The first menu choice will be NORMAL the last set mode. In this case, the “RESPONSE” was set to “NORMAL”. Page 64 MSI-3750 Digital Weight Indicator User Guide...
  • Page 65 NOTE: In order for set points to function they must be enabled in both the individual Mode menu and the general “SP MODE” menu. See “All Set Point Mode Procedure” , pg. 59. MSI-3750 Digital Weight Indicator User Guide Page 65...

  • Page 66: Enabling / Disabling Set Points

    A, B, A or B., A Ad b (Summed A+B). √ EXIT 5) Push to return to normal scale operation or use the DOWN keys to SETUP scroll to other set points. EXIT Page 66 MSI-3750 Digital Weight Indicator User Guide...

  • Page 67: Using The Msi 3750 As A Grading Scale

    11.5 to 12 lb, 12 to 12.5 lb, 12.5 to 13 lb, and ≥13 lb. Also, by programming the optional “MESSAGE”, the display gives an indication of the Grade, removing the need for any external lights or bins, etc., in a manual grading operation. MSI-3750 Digital Weight Indicator User Guide Page 67...
  • Page 68 NOTE: When GRADING mode is selected, the “VALUE” entry skips the “GREATER” and “LESSTHAN” entries. If the set points values were entered prior to enabling the “GRAD- ING” mode the “GREATER” and “LESSTHAN” selections will be ignored. Page 68 MSI-3750 Digital Weight Indicator User Guide...

  • Page 69: Relay Output Option

    5) Insert the wires as shown in the following diagram. Push down the white lever with a small screwdriver, insert the wire, then release the lever. It might be necessary to use needle nose pliers to help insert the wires into the MSI-3750 Digital Weight Indicator User Guide Page 69...

  • Page 70: Relay Applications

    It may be necessary to use a boost relay externally as in Figure 3. Cut off a motor when the Setpoint is reached Relay MOTOR Neutral SMD FUSE Figure 2 Page 70 MSI-3750 Digital Weight Indicator User Guide...
  • Page 71 Turn on a motor when the weight is out of limits Relay MOTOR SMD FUSE Motor is on when the weight is >5.5lbs or <4.5lbs Relay SP1 Set for <4.5lb SP2 Set for >5.5lb SMD FUSE Figure 5 MSI-3750 Digital Weight Indicator User Guide Page 71...

  • Page 72: Logic Output (Set Point 8)

    Do not connect any voltage outputs to the Logic Output Pins. They are protected for up to 15V only. The Logic Output should be interfaced only WARNING with logic inputs or base/gate connections to transistors. Page 72 MSI-3750 Digital Weight Indicator User Guide...

  • Page 73: Test Set Point Relays

    Ensure that the conductors to your circuit WARNING are securely fastened in the terminal block and that the cable is securely fastened in the watertight fitting. All wiring should comply with local electrical codes. MSI-3750 Digital Weight Indicator User Guide Page 73...

  • Page 74: Section 7 - Communication Ports

    DCE. Cable connections include RXD (input), TXD (output), Ground, CTS (input), RTS (output), and Shield Ground (also known as Frame Ground). CTS/RTS handshaking is optional and the lines do not need to be connected. Page 74 MSI-3750 Digital Weight Indicator User Guide...

  • Page 75: Comm Port Cabling

    There is no shield ground connection due to the isolated port. Tie the shield ground to the chassis of the DTE side. Cut any shield ground off and insulate it from the MSI-3750 chassis. 2) RS-485 – The RS-485 mode is a half-duplex serial communications channel capable of driving up to 4000 feet of cable.
  • Page 76 Reposition the wires as necessary. 5) Replace the front panel being careful to seat the gasket evenly around the lip Page 76 MSI-3750 Digital Weight Indicator User Guide...
  • Page 77 COMM PORT 2 2nd Comm Port Option OPTION BOARD Fiber-Optic Xmitter + RS-485 I/O– RS-485 I/O+ Fiber-Optic Xmitter – RS-485/232 Signal Ground RS-232 RXD (Input) RS-232 RTS (Output) RS-232 TXD (Output) MSI-3750 Digital Weight Indicator User Guide Page 77...

  • Page 78: Data Configuration

    2) Computer Control: The computer can control and receive data from the MSI 3750 through the Page 78 MSI-3750 Digital Weight Indicator User Guide...
  • Page 79 As the 3750 “@” commands can be buried in the set point strings, this capability greatly expands the versatility of the Comm Ports. MSI-3750 Digital Weight Indicator User Guide Page 79...

  • Page 80: Commport Setup Menu

    1 to 255. COM2TYPE This menu designates the operating mode of Comm Port 2. Comm Port 2 works as a RS-232, RS-485, or Fiber Optic output (units installed with fiber optic output option only). Page 80 MSI-3750 Digital Weight Indicator User Guide...

  • Page 81: Comm Port Parameters Menu

    2 BIT COMM PORT BAUDRATE 7 BIT RS-232 SETUP MENU STOPBITS 8 BIT RS-485 DATABITS F-OPTIC PARITY HANDSHAK EVEN COMM PORT NONE RTS/CTS SETTINGS XON/XOFF NONE HANDSHAKING (No RTS/CTS on Port 2) MSI-3750 Digital Weight Indicator User Guide Page 81...
  • Page 82 MOTION: When enabled the scale will only print settled data, i.e. when the motion detection annunciator is off. In legal for trade systems, the MOTN DET menu item is not editable. Use disabled when it is necessary to send data out the Page 82 MSI-3750 Digital Weight Indicator User Guide...
  • Page 83 HANDSHAK(e): Comm Port Handshaking is set in this menu. Use XON/XOFF for software handshaking commonly used in communicating with computers. Use CTS/RTS for hardware handshaking. Use NONE for situations where no handshaking is required or possible. MSI-3750 Digital Weight Indicator User Guide Page 83...
  • Page 84 SETTINGS menu or push the SETUP SETUP SETUP EXIT key three times to return to normal scale operation. ≥ EXIT EXIT EXIT Each push of the EXIT key will backup 1 menu level. Page 84 MSI-3750 Digital Weight Indicator User Guide...

  • Page 85: Printer / Output Formatting

    Use the UP/DOWN keys to scroll to the decimal number of the desired ASCII character. Refer to the ASCII table in Appendix B. The left digits on the LCD represent the character position. The right digits represent the ASCII decimal character number. When MSI-3750 Digital Weight Indicator User Guide Page 85...
  • Page 86 ENTER. See “Programming the End of Line String” for an example of using the ASCII entry mode. POSITION OF CURSOR DECIMAL ASCII CHARACTER CODE SETUP PRINT STRING ASCII NULLS Page 86 MSI-3750 Digital Weight Indicator User Guide...
  • Page 87 $ % & ‘ ( ) * +, – . / : ; < = > ? [ \ ] ^ _ ` SPACE Some of the punctuation marks are hard to recognize on the 16 segment display. Use the ASCII chart and the numeric display to verify the identity of the mark. MSI-3750 Digital Weight Indicator User Guide Page 87...

  • Page 88: Example Printer Formatting

    @D2 causes the current date to be printed in MM/DD/YY format Ω @E causes the end-of-line string to be sent. 255 is used by the 3750 to terminate the entire print string. Page 88 MSI-3750 Digital Weight Indicator User Guide...
  • Page 89 “ 1. 27” meaning the first character is an ASCII 27. 7) Push the 4 key to enter the next needed ∆ character. Push ENTER. ENTER ∆ 8) Using the step 5 procedure, enter an ASCII MSI-3750 Digital Weight Indicator User Guide Page 89...
  • Page 90 Í4ÍPEARSÍÍ5@E@W3 Note: Only 8 characters are viewable at a time. Use the Left/Right Scroll Keys to move the string window for checking purposes. ALPHA ALPHA Page 90 MSI-3750 Digital Weight Indicator User Guide...

  • Page 91: Programming The End Of Line String

    PRINT key. The message reads “COM- EXIT SETUP PORT1”. PRINT 2) Push ENTER. The message reads “FOR- COMPORT1 MAT”. The “END LINE” entry screen is in ENTER the FORMAT Menu. FORMAT MSI-3750 Digital Weight Indicator User Guide Page 91...
  • Page 92 SETUP SETUP another FORMAT menu, or push the EXIT key several times to return to normal scale operation. Each push of the EXIT key will EXIT EXIT EXIT backup 1 menu level. Page 92 MSI-3750 Digital Weight Indicator User Guide...

  • Page 93: Editing The Print String

    “ º ” character at discrete locations. Note: Memory space is always allocated for the Print Strings. There is no benefit to actually deleting characters past the first º MSI-3750 Digital Weight Indicator User Guide Page 93...

  • Page 94: General Text/Control Character Entry

    Characters and any other character not included in the standard 3750 character set. Use the ASCII table (Appendix B) to determine the decimal number equal to any desired character. See “Example Printer Formatting”, pg. 88, for a tutorial in programming a print string. Page 94 MSI-3750 Digital Weight Indicator User Guide...

  • Page 95: Serial Output "@" Commands

    Note that the blank place holder ID# is always 1, so the lowest alpha entry will be ID#2. Input Data Form: to print the ID Code number plus descriptor to print the ID Code number only MSI-3750 Digital Weight Indicator User Guide Page 95...
  • Page 96 Length: 10 Justification: left, position 10 always a space. YEAR MONTH @D5 2 5 J U L 2 0 0 0 Length: 10 Justification: left, leading month zero suppressed, pos 10 is space Page 96 MSI-3750 Digital Weight Indicator User Guide...
  • Page 97 Not to be confused with ID Codes, see @N and @C. Input Data Form: Print scale ID# (0-255) and descriptor MSI-3750 Digital Weight Indicator User Guide Page 97...
  • Page 98 Print “T CNT” (Total CouNT= number of weighments totaled) Print “TOTAL T CNT” Reserved - Not used on 3750 Print “GROSS+” or “NET+” or “AD2TOT” depending on the last totaled weight mode. Page 98 MSI-3750 Digital Weight Indicator User Guide...
  • Page 99 If Net weight is added Length: 6 Justification: left A D 2 T O T If Register is Empty Length: 6 Justification: left, the “+” indicates that it is the weight from the last totaled register MSI-3750 Digital Weight Indicator User Guide Page 99...
  • Page 100 Justification: full, leading hours zero suppressed AM/PM 2 : 0 8 : 3 6 Length: 11 Justification: full, leading hours zero suppressed @T3 1 4 : 0 8 Length: 5 Justification: left, leading hours zero suppressed Page 100 MSI-3750 Digital Weight Indicator User Guide...
  • Page 101 Totals (weighments counter) Total + n Totals (Combined @V5 and @V6) Reserved - not functional on 3750 Last Totaled Weight Note : will print dashes if no weight has been totaled. MSI-3750 Digital Weight Indicator User Guide Page 101...
  • Page 102 Length: 20 Justification: Weight - right, Units - left, Mode - left, ***** = Current Scale Display mode (GROSS, NET, PK GRSS or PK NET) Does not include Total, Tare, or Target. Page 102 MSI-3750 Digital Weight Indicator User Guide...
  • Page 103 @W9 - - - - - - - - A D 2 T O T Length: 20 Justification: Weight - right, Units - left, Mode - left, the “+” indicates that it is the weight from the last totaled register MSI-3750 Digital Weight Indicator User Guide Page 103...
  • Page 104 Use the @Y command to print the statistics of the current ID Code with text descriptor. Input Data Form: Average weight Minimum weight Maximum weight Standard Deviation Coefficient of Variance (%) Grand Total Grand Average Grand Number of Samples Page 104 MSI-3750 Digital Weight Indicator User Guide...
  • Page 105 PRINT ALL STATISTICS & GRAND TOTAL (requires Statistics Option) Purpose: Use the @Z command to print the statistics of all the ID Codes followed by the Grand Total Statistics. Input Data Form: Print All without labels Print All with labels MSI-3750 Digital Weight Indicator User Guide Page 105...
  • Page 106 @1W1 Print the Weight in the last display mode of Scale A. @2V2 Print the Gross Weight of Scale B. Output Data Form: Is dictated by the suffix command, see “@W” and “@V”. Page 106 MSI-3750 Digital Weight Indicator User Guide...

  • Page 107: Computer Operation

    I N T E R N A T I O N A L COMPUTER OPERATION The MSI-3750 can interface to computers via the RS-232 or RS-485 options. All functions can be controlled remotely and all setups can be downloaded automati- cally.
  • Page 108 Enter value = to 100% Terminate Value with any com- 100% Value mand or a “;” (semicolon). Bar Graph 0% Enter value = to 0% Terminate Value with any com- Value mand or a “;” (semicolon). Page 108 MSI-3750 Digital Weight Indicator User Guide...
  • Page 109 Enter Lock Code Value to lock or unlock the scale as set in the Lock Mode menu. Turn on the None Clock mode must be enabled with Power seconds showing. Delay at least 200ms before sending commands MSI-3750 Digital Weight Indicator User Guide Page 109...
  • Page 110 Set Point Dead Enter value in current Terminate weight value with a Zone Value units semicolon or another command. General Set 1=Disabled Points Mode 2=Normal Enable 3=Grading Set Point Latch 0=Off 1=On Page 110 MSI-3750 Digital Weight Indicator User Guide...
  • Page 111 If your printer prints lower case Mode 2=lower case letters select 2. Set Units 1=lb 2=kg Terminate Value with any com- 3=tons mand or a “;” 4=metric tons (tne) 5=oz 7=daN 8=lb-oz MSI-3750 Digital Weight Indicator User Guide Page 111...

  • Page 112: Section 8 - Scale Calibration

    (at least 20% of capacity) for the load receptor connected to the MSI 3750. Calibrate a Legal- For-Tade 3750 with test weights certified by the appropriate regulatory agency. Page 112 MSI-3750 Digital Weight Indicator User Guide...
  • Page 113 “LOAD EE?” for 2 seconds. 3) The first item in the Calibrate Setup Menu appears Use the DOWN scroll keys to locate the desired Calibrate operation as described in the follow- ing procedures. MSI-3750 Digital Weight Indicator User Guide Page 113...

  • Page 114: Calibrate Setup Menu

    Note (Dual Load Cell Systems Only): The “STANDARD” menu is not available on Dual Load Cell ABC Systems. The standard is fixed at “Industrial”. Note: Before starting the following procedure, you must be in the Top Menu Level of Calibration. See “Enable Calibration”. Page 114 MSI-3750 Digital Weight Indicator User Guide...
  • Page 115 Use the keys to scroll to the next calibration operation or push EXIT EXIT to return to normal scale operation. NOTE: Contact MSI for details on the differences between the various configurations. MSI-3750 Digital Weight Indicator User Guide Page 115...

  • Page 116: To Calibrate (Standard Calibration)

    In this example, we show calibrating 500 . 2 _ with a Test Weight certified at 500.2 lb. ≈ Metric Cal Example : 5 lb of dead weights are Page 116 MSI-3750 Digital Weight Indicator User Guide...
  • Page 117 “CAL OK” then “STOR- SETUP EXIT ING”. Calibration is complete, push to return to normal scale operation, or push UP/DOWN to choose another Calibrate EXIT Setup function. Seal the calibration port. MSI-3750 Digital Weight Indicator User Guide Page 117...

  • Page 118: Calibration Error Messages

    INIT CAL on the scale. procedure. Displayed when the entered 1) Input the capacity CPACTY scale capacity is zero or the properly (Init Cal) capacity register is empty. Capacity register zeroed Page 118 MSI-3750 Digital Weight Indicator User Guide...
  • Page 119 Displayed when the weight of procedure (coarse zero) 0 MAG WT the Magnum unit entered is to add counts on the low Magnum weight not less than or equal to zero. end. entered or ≤0 MSI-3750 Digital Weight Indicator User Guide Page 119...

  • Page 120: Reset Calibration

    Codes, all Set Points, all Print Strings, and resets all the CAUTION registers back to factory defaults. DO NOT initiate this function unless you are prepared and qualified to perform a complete initialization and Calibration procedure. Page 120 MSI-3750 Digital Weight Indicator User Guide...
  • Page 121 ENTER EXIT. 4) The system will now be in the “UNCAL’ED” state. Push the cal switch UNCAL’ED and use the “INITIAL CALIBRATION” procedure to calibrate the 3750. MSI-3750 Digital Weight Indicator User Guide Page 121...

  • Page 122: Initial Calibration

    ∆ the capacity value. In this example we’ll set the meter Capacity at 1000_ SPACE 1000 kg. The Capacity is defined as the ∆ maximum weight the scale is expected to weigh. Page 122 MSI-3750 Digital Weight Indicator User Guide...
  • Page 123 If you cannot load the scale to SETUP capacity, use the gain table to set the gain. This table cannot be absolutely correct due to variations in offsets and dead loads and is MSI-3750 Digital Weight Indicator User Guide Page 123...
  • Page 124 1000kg capacity scale with a Test Weight CAL’ING certified at 2000 lb. Since 2000 lb is equal 907.2 kg (2000*.4536) we’ll use 907.2 here. 17) Once the weight on the load receptor is Page 124 MSI-3750 Digital Weight Indicator User Guide...

  • Page 125: To Enable/Disable Azm

    AZM range so that the produce isn’t also zeroed out. Note: Before starting the following procedure, you must be in the Top Menu Level of Calibration. See “Enable Calibration”. MSI-3750 Digital Weight Indicator User Guide Page 125...
  • Page 126 MSI 3750. Also use caution in setting the AZM window too large. This can cause the scale to CAUTION zero unexpectedly. MSI recommends keeping AZM below 5d for most applications. Page 126 MSI-3750 Digital Weight Indicator User Guide...

  • Page 127: To Adjust The Motion Band

    ENTER. SETUP EXIT 5) Push to return to normal scale EXIT operation, or push DOWN to choose another Calibrate Setup function. Note: In Legal-for-Trade systems the Motion Band can not be adjusted. MSI-3750 Digital Weight Indicator User Guide Page 127...

  • Page 128: Coarse Zero

    SW4. If the offset is negative (at zero load the Bargraph is under 10%), turn on SW3. Do not have both SW3 and SW4 on at the same time. Turning both on will not damage the scale, but the Page 128 MSI-3750 Digital Weight Indicator User Guide...

  • Page 129: Raw Counts

    Next follow the “INIT CAL” procedure completing all the steps up to and including step 6. Be sure you set the appropriate gain for your load cell(s). Now instead of Zeroing the Scale, push the EXIT key twice. The MSI-3750 Digital Weight Indicator User Guide Page 129...
  • Page 130 Remember that Raw Counts is typically 10 times the resolution displayed so don’t worry about getting the readings exact. Once the readings have converged, enable Calibration and calibrate the system with the “Init Cal” procedure. Page 130 MSI-3750 Digital Weight Indicator User Guide...

  • Page 131: Calibration Flowchart

    SPAN Cal ERROR ERROR Too much Too little or dead load or INPUT VAL too much offset in the weight on the TEST load cell. scale. WEIGHT or Correct with Coarse Zero MSI-3750 Digital Weight Indicator User Guide Page 131...

  • Page 132: Appendix A - Specifications & Options

    • 400 hours (2000Ω gages) or 100 hours (350Ω gages) typical with occasional use of the LCD backlight . Typically 100 hours (2000Ω gages) with continu- ous use of backlight (on low setting). Page 132 MSI-3750 Digital Weight Indicator User Guide...

  • Page 133: Options

    This feature should not be confused with Weigh Meters that have multiple inputs that switch between inputs. The 3750 converts two scales independently and can check against set points even MSI-3750 Digital Weight Indicator User Guide Page 133...
  • Page 134 Any key or all keys can be duplicated external to the meter. Factory set for TOTAL. Can be changed by special order. • Mounting Bracket For Wall or Bulkhead Mounting. 180° Swing Page 134 MSI-3750 Digital Weight Indicator User Guide...

  • Page 135: Meter Mounting Bracket

    M E A S U R E M E N T S Y S T E M S I N T E R N A T I O N A L METER MOUNTING BRACKET MSI-3750 Digital Weight Indicator User Guide Page 135...

  • Page 136: Appendix B - Ascii Table

    ^S DC3 ^T DC4 ^U NAK ^V SYN ^W ETB ^X CAN ^Y EM ^Z DUB ^ [ ESC ^ \ FS < ^ [ GS ^ ^ RS > ^ _ US Page 136 MSI-3750 Digital Weight Indicator User Guide...

  • Page 137: Appendix C - Menu Maps

    MODE MENU 100% PRINT VALUE ENTER POWER BAR 100% ENTER PEAKHOLD VALUE LEVEL * NETGROSS SETUP ZERO PER CENT ID NUMBR BAR 0% ENTER DISABLED BARMODE ENTER EXIT * Magnum LFT Scales Only MSI-3750 Digital Weight Indicator User Guide Page 137...
  • Page 138 ID # SETUP NAME ID STRING 2 ID NAME ENTER Enter up to (Usually F1) 20 Char's EXIT STRING 2 ENTER STRING 1 ENTER Enter up to 20 Char's ID STRING 1 Page 138 MSI-3750 Digital Weight Indicator User Guide...
  • Page 139 2 BIT COMM PORT BAUDRATE 7 BIT RS-232 SETUP MENU STOPBITS 8 BIT RS-485 DATABITS F-OPTIC PARITY HANDSHAK EVEN COMM PORT NONE RTS/CTS SETTINGS XON/XOFF NONE HANDSHAKING (No RTS/CTS on Port 2) MSI-3750 Digital Weight Indicator User Guide Page 139...
  • Page 140 M E A S U R E M E N T S Y S T E M S I N T E R N A T I O N A L Page 140 MSI-3750 Digital Weight Indicator User Guide...

  • Page 141: Appendix D - Wiring Connections

    RS-232 CONNECTIONS 2 3 4 5 6 COMM PORT 1 Std RS-232 Option RS-232 RS-232 Shield Ground RS-232 Signal Ground RS-232 Xmitter (Output) RS-232 CTS (Input) RS-232 Receive (Input) RS-232 RTS (Output) MSI-3750 Digital Weight Indicator User Guide Page 141...

  • Page 142: 2Nd Comm Port & Rs-485 Connections

    Auxiliary input can be a contact closure(normally open), Common (pin 1) a MOSFET or BJT (normally off), or a TTL output (normally high, 5V max). e.g. connect a N.O. contact between pins 1 and 2. Page 142 MSI-3750 Digital Weight Indicator User Guide...

  • Page 143: Relay Option Board Connections

    (Lo True on Set Point 8) Typical for all seven relays TTL Output (Hi True on Set Point 8) Relay Common Contact Relay Normally Closed Contact TTL Output Ground +5V Out (<20mA) Relay Normally Open Contact MSI-3750 Digital Weight Indicator User Guide Page 143...

  • Page 144: The Msi Limited Warranty

    In no event shall the Company be liable for the cost of any repairs or alterations made by others except those repairs or alterations made with its specific written consent, nor shall Measurement Systems International be liable for any damages or delays whether caused by defective workmanship, materials or otherwise.
  • Page 146 Measurement Systems I N T E R N A T I O N A L 14240 INTERURBAN AVENUE SOUTH SEATTLE, WASHINGTON 98168-4660 U.S.A. © 1999 by Measurement Systems International 206-433-0199 • FAX: 206-244-8470 Printed in U.S.A. Web: www.msiscales.com • Email: info@msiscales.com...

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