Measurement Systems MSI-3750 User Manual

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ELECTRONIC DIGITAL WEIGHT INDICATOR

User Guide

Quality Industrial Weighing and Force Measurement Equipment

Measurement Systems International

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

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MSI-3750 Digital Weight Indicator

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TABLE OF CONTENTS

INTRODUCTION....................................................3

3750 Display....................................................... 3

3750 Front Panel ................................................ 4

Features .............................................................5

Batteries (Option) ...............................................6

Load Cell Hookup ............................................... 7

SECTION 1 – SCALE OPERATION ...................... 8

Power .................................................................8

Zero ....................................................................9

Tare..................................................................... 9

Setup Tare ........................................................13

Net/Gross ......................................................... 16

Units .................................................................16

Setup Units ....................................................... 17

Peak Hold (Function Key Option) ..................... 18

Print ..................................................................19

Test ................................................................... 19

SECTION 2 – FUNCTION KEYS ......................... 20

Setup Function Keys ........................................20

SECTION 3 – ID CODES..................................... 22

ID Code Organization ....................................... 22

Using ID Codes ................................................ 24

Setup ID Codes ................................................30

ID Code String 1 & String 2 .............................. 33

SECTION 4 – TOTAL / STATISTICS .................... 35

Total .................................................................. 35

Auto Total.......................................................... 36

Total Menu (Setup Total)................................... 37

View Total .........................................................40

Clear All Totals.................................................. 42

Statistics (Option) .............................................42

Definitions And Formulas..................................43

Using Statistics ................................................. 44

SECTION 5 – 3750 METER SETUP.................... 46

Main Setup Menu ............................................. 46

Filter.................................................................. 47

LCD Contrast....................................................48

Real Time Clock/Calendar................................49

Setup Power Menu ........................................... 50

LCD Backlight...................................................51

Bargraph Menu................................................. 52

Lock .................................................................. 54

SECTION 6 – SET POINTS.................................58

Setup Set Points Menu..................................... 58

Set Point 1 Through Set Point 8 ....................... 60

Using Set Points ............................................... 62

Enabling / Disabling Set Points ........................ 66

Using The MSI 3750 As A Grading Scale.........67

Relay Output Option ......................................... 69

Relay Applications ............................................ 70

Logic Output (Set Point 8) ................................ 72

Test Set Point Relays .......................................73

SECTION 7 – COMMUNICATION PORTS.......... 74

Electrical Conformance .................................... 74

Comm Port Cabling ..........................................75

Data Configuration............................................ 78

Output Control .................................................. 78

Comm Port Setup Menu ................................... 80

Comm Port Parameters Menu..........................81

Printer / Output Formatting ............................... 85

Example Printer Formatting.............................. 88

Programming The End Of Line String .............. 91

Editing The Print String..................................... 93

General Text/Control Character Entry .............. 94

Serial Output “@” Commands .......................... 95

Computer Operation ....................................... 107

SECTION 8 – SCALE CALIBRATION................ 112

Calibrate General Information ........................ 112

Enable Calibration .......................................... 112

Calibrate Setup Menu..................................... 114

To Select Legal Standard ............................... 114

To Calibrate (Standard Calibration) ................ 116

Calibration Error Messages ............................ 118

Reset Calibration ............................................ 120

Reset All .........................................................120

Initial Calibration ............................................. 122

To Enable/Disable AZM .................................. 125

To Adjust The Motion Band.............................127

Coarse Zero.................................................... 128

Raw Counts .................................................... 129

Calibration Flowchart...................................... 131

APPENDIX A – SPECIFICATIONS & OPTIONS 132

Specifications .................................................132

Options ........................................................... 133

Meter Mounting Bracket .................................135

APPENDIX B – ASCII TABLE ............................136

APPENDIX C – MENU MAPS............................ 137

APPENDIX D – WIRING CONNECTIONS ........ 141

Load Cell Connections ...................................141

RS-232 Connections ......................................141

2nd Comm Port & RS-485 Connections......... 142

Auxiliary Digital Input ...................................... 142

Relay Option Board Connections ...................143

The MSI Limited Warranty ................................. 144

MSI-3750 Digital Weight Indicator

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INTRODUCTION

The Measurement Systems International MSI 3750 Weigh Meter represents a new level of technology and performance in the Scale Industry. A 16 bit Microcontroller and 20 bit A/D Converter coupled with an alphanumeric display gives unprecedented versatility and programmability. The large, backlit, alpha-numeric display provides precise, unambiguous indication of operating modes such as Net, Gross, or Total. Digital calibration makes maintaining the scale a snap, and the single board, marine-proof (NEMA 4) construction makes for a rugged and reliable scale. An option card can be plugged in which provides 7 set point relays, a Logic Output, and an additional isolated RS232 port or RS-485 port. A Statistics option is available for process or production monitoring of up to 350 ID Codes. The 3750 is designed to meet or exceed the requirements of all regulatory agencies.

3750 DISPLAY

ozlb

∑

AUTO

SETUP

RF LINK REMOTE

0 50 75 100

METRIC

LEVEL

RF LEVEL

Motion Indicator

Center of Zero

Low Battery Warning

21 Segment Bargraph

Mode Annunciators

8 Character (0.5") Alpha-Numeric Message Display

Units Annunciators

6 Digit Weight Display (0.9")

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Measurement Systems

International

SETPOINT TOTAL

MSI-3750

SEATTLE WASHINGTON U.S.A.

TOTAL VIEW TOTALSET POINTSID # UNITS

max

III n =5,000 / III L n =10,000

EXIT

TARE

ASCII

MNO

ENTER

SETUP

EXIT

POWER

ZERO

CLR

@YZ

B/G

INSERT

NET/GROSS

ALPHA

ABC

SPACE

PQR

STU

DEF

GHI

JKL

VWX

Programable Function Keys

Alpha-numeric Keys

3750 FRONT PANEL

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FEATURES

• Designed to meet or exceed all US and international standards.

• 6 Large, .9” digits for clear weight readings from a distance.

• Up to 350 built-in ID Codes with separate Alphanumeric Names, Tare, Mode. ID Codes are addressed by any customer given name.

• Easy to read annunciation of ID Names and Menu Prompts are provided on eight .5” alphanumeric Characters.

• Full RS232 output formatting offers exceptionally versatile data output. Weight data can be printed in any desired way, the customer can add any alpha characters and/or printer formatting commands, including formatting for Bar Code printers.

• Analog bargraph provided for relative to full-scale weight indication. Also used for tilt indication with the Magnum Fork Lift System.

• Display illumination uses rugged, long life, LED back-lighting coupled with a transflective LCD to provide optimum display contrast under all ambient conditions from full sunlight to total darkness. Operation is light-sensing automatic or manually set.

• Versatile power input options: AC Only (90-260 VAC 45-65 Hz), 9-36 VDC Input, 18-60VDC and two D Cell Battery operation. Accessory Power Supplies are available to allow 250VDC operation as well.

• Easy to maintain: Full digital calibration assures reliable, repeatable measurements.

• Selectable for lb, kg, g, tons, metric tons, ounces, and per cent (some units and /or units switching may be prohibited in legal for trade units).

• Automatic or manual weight totalization for logging total throughput.

• Complete Marine sealing ensures reliable operations under harsh conditions. Rugged cast aluminum package is coated to resist corrosive atmospheres. Meets all requirements of NEMA 4 and IP65.

• 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.

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BATTERIES (OPTION)

Type: 2 Standard “D” Cells, or 2 High Capacity Ni-Cads. With standard D cells,

alkaline type is preferred but standard Carbon-Zinc can also be used. Using NiCads or Carbon-Zinc batteries typically will cut the available battery life in half.

Installing /Changing:

1) The batteries must have enough charge to ensure accurate operation. (2 batteries in series must total more than 1.6V).

2) Turn the 3750 off.

3) Remove the Battery Cover by turning the cap counter-clockwise.

4) Remove the old batteries by pushing in on the battery rapidly and allowing the spring to push the batteries out. Replace the batteries with two fresh “D” cells. The negative end goes in first.

5) Reinstall the battery cap by turning the knob clockwise.

6) (Optional) The batteries can be checked with the Test Mode. Power displayed is in relative % of battery life. If the number with fresh batteries is extremely low, (<20%) turn off the power, remove the batteries, and check that the polarity of both batteries is correct.

Low Battery Indication A small Battery Symbol will appear on the LCD when there is approximately

10% of battery life remaining. The symbol will start flashing when power failure is imminent. At this point the backlight will also turn off to try to conserve battery life. You must replace the batteries when the symbol starts flashing. The unit will automatically shut down if the batteries are not replaced shortly after the battery symbol starts flashing (actual time depends on load conditions).

12V CAR BATTERY INPUT (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.

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LOAD CELL HOOKUP

1) Unplug the meter, or if battery powered, remove the batteries. Remove the front panel of the 3750 with a properly sized Phillips screwdriver. Note the position of the seal screw that has a side hole (lower left corner viewed from the front).

2) Gently pull the front panel out and lay it down in front of the cast housing.

3) Loosen the right side (viewed from the back) liquid tight feedthrough connector fitting with a 3/4" open wrench. Feed the Load Cell cable through the liquid tight connector.

4) Strip and tin the Load Cell leads and attach them to the appropriate terminals with a small screwdriver. The 3750 comes standard with 4 terminal connections which are adequate for cable lengths of 50' (15 meters). Any shield should be connected to the Shield terminal. See Appendix D for wiring diagrams.

5) After pulling lightly on the wires to check for firm connection, take the slack out of the load cell cable as you close up the case.

6) Tighten the liquid tight feedthrough connector to ensure a watertight enclosure.

7) Put 2 screws in the front panel to hold it in place. Restore the power (batteries or AC).

8) Refer to the calibration section. If this is a first time hookup of this capacity load cell, perform the RESET CALIBRATION procedure followed by the INITIAL CALIBRATION procedure. If an identical Load Cell with the same capacity was replaced (or cable replaced, etc.) it should only be necessary to do a standard calibration.

9) If there were no calibration errors reported and the calibration is complete, install the remaining screws loosely. When all the screws are in place tighten them down in a left, right, up, down pattern, never tightening any one screw all the way until all the screws are mostly tightened. This ensures even pressure on the Oring. 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.

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SECTION 1 – SCALE OPERATION

POWER

Turns the Weight Indicator On and Off.

To Turn On the Power

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.

➀

POWER

ozlb

∑

AUTO

SETUP

RF LINK

REMOTE

0 50 75 100

METRIC

LEVEL

RF LEVEL

➁

1) Push POWER. The system performs a

display check: All segments and the Set Point/Total LED’s illuminate for 3 seconds, then turn off for 1/2 second.

2) The LCD displays “3750” and the software version number.

3) The Microcontroller tests the internal circuitry. Any test failure will produce an error message on the LCD.

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ZERO

Sets the zero reading of the scale. Use the zero key to take out small deviations in zero when the scale is unloaded. (See “TARE”, pg. 9, for zeroing (Tareing) package or pallet weights)

To Zero

Rules for Use:

1) Works in GROSS or NET mode.When in NET mode the display will return to the negative Tare value

2) The scale must be stable. The scale will not zero if the motion detect annunciator is on.

3) The scale will accept a zero setting over the full range of the scale (NTEP and other Legal-for-Trade models may have a limited zero range). Zero settings above 4% of full scale will subtract from the overall capacity of the scale. For example if you zero out 100 lb on a 1000 lb scale the overall capacity of the scale will reduce to 900 lb plus the allowed over-range amount.

TARE

Tare is typically used to zero out a known weight such as a packing container or pallet and display the load in NET weight. A Tare value is entered in one of three ways:

1) AUTO TARE – When the TARE key is pushed twice (or once if the Tare Mode is Auto), the current weight is zeroed and Net Weight is displayed.

2) KEYBOARD TARE – Using the numeric keys, the operator keys in the desired Tare Weight then pushes the ENTER Key.

3) TARE UP/DOWN – Using the Scroll Keys, the Tare value is changed one scale division at a time. TARE UP/DOWN is useful for incrementing or decrementing the current Tare value slightly. The Keyboard Tare and Tare Up/Down modes can be disabled through the use of SETUP TARE. In the “AUTO” mode a single push of the TARE key will enact AUTO TARE.

ZERO

Push ZERO. The weight reading must be stable within the motion band for the zero function to work. The display temporarily reads “ZEROED” and the digits display 0. The backup memory stores the zero reading, and can restore it even if power fails.

Final: The numeric digits display “0”(or 0.0 or 0.00, etc.).

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To Auto Tare Rules for Use:

1) Only positive gross weight readings can be tared. Weight can be tared in both the NET and GROSS modes. When in the NET mode, the TARE is not cumulative, all the weight is zeroed.

2) The motion annunciator must be off. The weight reading must be stable.

3) Setting or changing the tare has no effect on the Gross zero setting.

4) Taring will reduce the apparent over range of the scale. For example, taring a 10 lb container on a 60 lb scale, the scale will overload at a net weight of 50 lb (60-10) plus any additional allowed overload (usually ~4%).

5) The scale stores the Tare value in the current ID Code memory until cleared. Each available ID Code can store independent Tare values.

To Read the Tare Value

(without changing it)

TARE

key function must be set to “KBD/UPDN”.

➀

TARE

ASCII

➁

TARE

ASCII

NET INDICATION

1) Push TARE. The current Tare value is

displayed.

Note: If the TARE key is setup for “AUTO” only one push of the TARE key will be necessary.

2) Push TARE again. Assuming no motion,

the display temporarily reads “TARE SET” and then converts to a “NET” display. All following readings are deviations from the set Tare value.

1) Push TARE. The message display reads

“TARE” and the current Tare value appears on the numeric digits for 2 seconds. Note or Print the value as desired.

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.

➀

TARE

ASCII

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To Clear Tare and return to GROSS mode

To Keyboard Tare

(

TARE

key function must be set to “KBD/UPDN”)

1) Push TARE followed by CLR (ZERO).

The message display reads “TARE CLR”. The scale returns to the GROSS mode. Alternate method: Remove all weight from the scale (Gross Zero) and push TARE. The message display temporarily reads “TARE CLR”. Then the scale returns to the GROSS mode.

➀

TARE

ASCII

➁

ZERO

1) Push TARE. The display reads “TARE”.

Any current Tare value is displayed.

2) Using the numeric keys input the value desired. In this example we’ll use 0.5 lb as a Tare Value.

Note: The 3750 will automatically place a leading zero if the Tare value starts with the decimal point.

3) The Tare Value “0.5” is displayed. Push

ENTER to place the value in the 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.

➀

TARE

ASCII

➁

MNO

➂

ENTER

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To Use Tare Up/Down

(

TARE

key function must be set to “KBD/UPDN”)

1) Push TARE. The display reads “TARE”.

Any current Tare value is displayed. In this example a value of 9.5 LB was previously Tared.

2) Within 2 seconds after pushing the TARE key, use the UP or DOWN scroll keys to increment or decrement the Tare value. Each single push of the scroll keys will change the current Tare value 1 scale division. In this example, the scale increment is .5 lb.

3) The Tare Value “10.5” is displayed. Push

ENTER to place the value in the 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.

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.

➀

TARE

ASCII

➁

➂

ENTER

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SETUP TARE

Programs the TARE key mode (TAREMODE), the automatic TARE Clear function (AUTO CLR), and the TAREALL function. TAREMODE

1) AUTO – Only Auto Tare is in operation. Every time the TARE key is

pushed, the current weight on the scale is tared.

2) KBD/UPDN – In this mode, pushing the TARE key will enable the numeric keypad for Keyboard Tare and the UP/DOWN scroll keys for TARE UP/ DOWN. Also in this mode, pushing the TARE button a second time will enact AUTO Tare.

TAREALL The TAREALL feature allows a single Tare value to be shared by all ID Codes. With TAREALL enabled the individual Tares stored with each ID Code are ignored (but not erased). Disabling TAREALL will restore the original Tare values. TARE ALL is intended for those applications where a common carrier or pallet is used, but multiple ID Codes are necessary for data collection. AUTO CLR Enabling “AUTO CLR” causes the 3750 to clear the Tare Value after each lift greater than 0 NET. The Tare Value is cleared and the display mode reverts to Gross Weight once the load is removed (the weight goes below 0 NET). The “ON TOTAL” setting clears the Tare Value after the load is totaled. The default for the “AUTO CLR” function is “DISABLED” . When disabled, the Tare Value can only be cleared manually (see “To Clear Tare and return to Gross Mode”.)

TARE KEY MODE

TARE SETUP MENU

TARE AUTO CLEAR MENU

ON TOTAL ENABLED DISABLED

TAREMODE

AUTO CLR

ENTER

ENABLED DISABLED

TAREALL

ENTER

TAREALL MENU

AUTO KBD/UPDN

EXIT

SETUP

TARE

ASCII

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To Setup the Tare Key Mode

To Enable Tare Auto Clear

➀

EXIT

SETUP

➀

TARE

ASCII

TAREMODE

➁

ENTER

AUTO

➂

KBD/UPDN

√

ENTER

TAREMODE

➄

EXIT

SETUP

1) Push SETUP followed immediately by the

TARE switch.

Note: If the TARE switch was pushed too late, the scale will go into the main SETUP menu. Push EXIT and try again.

2) Push ENTER. The first menu choice is the

current TARE key mode. In this example, the “AUTO” mode is enabled. We’ll change the mode to “KBD/UPDN”.

3) Push the UP key to change the Tare Key

mode to “KBD/UPDN”.

4) Push ENTER. The Scale returns to the

SETUP TARE menu.

5) Push EXIT to return to normal operation with the TARE key function altered.

➀

EXIT

SETUP

➀

TARE

ASCII

TAREMODE

➁

TAREALL

➁

AUTO CLR

➂

ENTER

DISABLED

1) Push SETUP followed immediately by the

TARE switch. The first menu choice

“TAREMODE” appears.

Note: If the TARE switch was pushed too late, the scale will go into the main SETUP menu. Push EXIT and try again.

2) Push the UP scroll key to change the menu to “AUTO CLR”.

3) Push ENTER. The first selection is the current AUTO CLR mode.

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√

ENABLED

➄

ENTER

AUTO CLR

≈

EXIT

SETUP

4) Push the UP key to change the AUTO CLR

mode to “ENABLED”.

5) Push ENTER. The AUTO CLR is now

enabled and the 3750 is back in the SETUP TARE menu.

6) Push EXIT to return to normal scale

operation (with the AUTO CLEAR TARE function enabled).

To Enable TAREALL

➀

EXIT

SETUP

➀

TARE

ASCII

TAREMODE

➁

TAREALL

➂

ENTER

DISABLED

√

ENABLED

➄

ENTER

TAREALL

≈

EXIT

SETUP

1) Push SETUP followed immediately by the

TARE switch. The first menu choice

“TAREMODE” appears.

Note: If the TARE switch was pushed too late, the scale will go into the main SETUP menu. Push EXIT and try again.

2) Push the UP scroll key to change the menu

to “TAREALL”.

3) Push ENTER. The first selection is the

current TAREALL mode.

4) Push the UP key to change TAREALL to

“ENABLED”.

5) Push ENTER. TAREALL is now enabled

and the 3750 is back in the SETUP TARE menu.

6) Push EXIT to return to normal scale

operation (with the TAREALL function enabled).

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NET/GROSS

Switches the display between Net and Gross modes. Net Weight is defined as Gross Weight minus a Tare Weight. Note: Switching back to Gross mode from Net mode will not clear the Tare value. This allows the operator to use the Gross Mode temporarily without having to reestablish the Tare value. Only manually clearing the Tare or setting a new Tare will change the tare value held before switching into Gross Mode.

OIML Legal-for-trade units only: The

NET/GROSS

key is temporary action only. The Gross weight is displayed for 2 seconds and then the display returns to the Net Mode. The only way to return to permanent Gross readings is to clear the Tare (see “To Clear Tare and return to GROSS mode”, pg.11).

To Switch Between Net Mode and Gross Mode

NET INDICATION

INSERT

B/G

NET/GROSS

INSERT

B/G

NET/GROSS

1) Starting in the NET weight mode –This example has a TARE weight equal to 40.5 lb. Push NET/GROSS. The message will briefly display “GROSS”. All subsequent readings will be Gross weight until the

NET/GROSS key is pushed again, or until

the TARE is changed.

Note: If working with an ID Code present the ID Name will return to the message display after the “GROSS” or “NET” message shows.

2) Pushing NET/GROSS again will revert the display to the NET mode.

UNITS

Allows easy weight units conversions. Up to 8 Units are available. See “SETUP UNITS” for details on activating the available units.

Note: This operation requires that one of the Function Keys is setup as the

UNITS

key. See “FUNCTION KEYS”. The example given below has F5 programmed to be “UNITS” which is the default 3750 mode. Change the example as required if one of the other keys is programmed to be “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.

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To Change the UNITS

SETUP UNITS

Enables the desired weight units for activation by the UNITS key. For example, if an operator only wants pounds and kilograms activated, all other units can be disabled. This Menu is moved to the Calibrate Setup menu in NIST and OIML units.

Note: This operation requires that one of the Function Keys is setup as the

UNITS

key.

To Enable/Disable UNITS

UNITS

KILOGRAM

UNITS

SHORTTON

Push UNITS (Usually F5). The displayed weight will change to the next activated unit. If more than two units are activated, pushing the UNITS key will rotate through the available choices.

1) Push the SETUP key followed immediately by the UNITS key (usually F5). The menu will display “UNITS”

Tons available on capacities 2,000 lb and over. Metric Tons available on capacities 1000 kg and over. lb-oz, oz, and g available on scales 250 lb and under.

2) Push ENTER. The unit POUNDS will appear.

3) The numeric display will read “On” if the displayed unit is activated or will read “OFF” if it is inactivated. Use the LEFT or

RIGHT Cursor keys to change the status of

the displayed unit from “On” to “Off”

4) Use the UP Scroll key to scroll through all the available UNITS and use the LEFT or

RIGHT Cursor keys to enable (On) or

disable (OFF) the unit as desired.

Note: If the user attempts to disable all units, Pounds will automatically be enabled. OIML units are limited to kg, g, and metric Tons.

5) When finished selecting units, push EXIT to return to normal scale operation.

➀

EXIT

SETUP

➀

UNITS

➁

ENTER

➂

√

KILOGRAM



Scroll Through Available units

√

GRAMS

≈

EXIT

SETUP

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PEAK HOLD (FUNCTION KEY OPTION)

Allows monitoring peak weight. Uses a special mode of the A/D converter for capturing transient events. To Capture Peak Weight Readings

1) Program a FUNCTION key for “PEAKHOLD” (See Section 2).

2) Turn on the Peak Hold mode by pushing the selected FUNCTION key. The

display reads “PEAK NET” or “PK GROSS” to indicate peak hold mode is enabled. The display will only update when a greater value than previously recorded is detected.

To Clear Peak Weight Readings Turn off the Peak mode by pushing the FUNCTION key programmed as “PEAK HOLD”. The 3750 reads “PEAK OFF” and clears the peak value from memory. The display will revert to NET or GROSS mode.

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.

SELECT UNITS

LBS-OZ GRAMS OUNCES METRIC T TONS KILOGRAM POUNDS

ON OFF

EXIT

SETUP

UNITS

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➀

EXIT

SETUP

➀

@YZ

ozlb

∑

AUTO

SETUP

RF LINK

REMOTE

0 50 75 100

METRIC

LEVEL

RF LEVEL

Final: Either the reading returns to the pre-test condition, or an error message is displayed.

1) Push the SETUP key followed immediately by the 9 key.

a) All segments turn on for 1 second, then off

for 1/2 second.

b) All digits (7 segment and 16 segment)

count once from 0 to 9. All anunciators are tested including lb, kg, t. and the Total LED.

c) Battery condition is displayed next in the

form: % of Battery life with a figure from 1 to 100 on the digits. The % battery life will vary depending on whether the backlight is on or off.

d) Internal tests are performed to further

ensure scale integrity.

Sends the current displayed reading to the printer or selected Comm Port, unless otherwise setup in the Print Setup menu . Any or all weight, time, date, and scale parameter functions can be printed as set in the Comm Port Parameters Menu. Refer to Section 7 for more details.

Pushing the PRINT button alone will cause both Comm Ports to output their specified print string unless specifically disabled in the Comm Port Parameters Menu.

TEST

Provides a functional system test, and an on-demand display check without disturbing the current weighment. The Test function can be interrupted by pushing any key during the test.

Note: The TEST function is also available as a FUNCTION key function. See “FUNCTION Keys” Section 2.

Test Meter Operation

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SECTION 2 – FUNCTION KEYS

SETUP FUNCTION KEYS

The 3750 has five FUNCTION keys that can be programmed to any of several functions. The default functions are: ID#, SET POINTS, TOTAL, VIEW TOTAL, and UNITS. Each key can be programmed for other functions. For example, the UNITS key can be changed into a GRAND TOTAL key. Also any of the five keys can be disabled. MSI provides Function Key Labels with every 3750. After the Function Keys are programmed as desired, apply the appropriate label to the embossed area above the key. MSI can supply custom labels on request. For example, if the String 1 function is to be used to input a customer number, MSI can supply a label that reads “CUSTOMER”. Contact MSI to order custom Function Key labels.

EXIT

Function Default Function Description

CLRLATCH Clears any latched Set Points DISABLED Key does nothing

GRNDTOTL Gives the grand total of all ID Codes ID NUMBR F1 Push to change the ID Code PEAKHOLD Turns Peak Hold on and off. SCALENUM Changes the Scale Input

SETPOINT F2 Allows setting the set point values. STATS Shows Statistics on the current ID Code.

STRING 1

Direct access to ID String1. Use for Customer Name, Operator, etc.

STRING 2

Direct access to ID String2. Use for Customer Name, Operator, etc.

TEST Setup 9 Test Display, battery, A/D converter (see TEST) TOTL F3

Add current weight to the total (Manual Total) or turn Auto Total On/Off (Auto Total Mode).

UNITS F5 Change weight Units.

VIEW ∑ F4 Display the Total weight of the current ID Code.

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To Define the Function Keys

1) Push SETUP. First the LCD will display the SETUP Screen, then the first setup menu item is “KEY FCTN”.

In this example we’ll change the function of the SET POINTS key (F2) to “PEAK HOLD”.

2) Push ENTER. You are now in the KEY FUNCTION Menu. The LCD reads “ASSGN F1”.

3) Push the UP Scroll key to change to “ASSGN F2”.

4) Push ENTER. The Function Key selection list is shown.

5) Use the UP/DOWN keys to scroll through all the functions that F2 key can be set to. Stop on “PEAKHOLD”. Note: If you hold down the scroll key it will start to increment automatically.

6) Push ENTER to assign the PEAKHOLD function to F2. The display shows the menu item “ASSGN F2”.

7) Push EXIT (SETUP) twice to return to normal scale operation, or assign another Function key using steps 3-6.

➀

EXIT

SETUP

2s Delay KEY FCTN

➁

ENTER

ASSGN F1

➂

ASSGN F2

√

ENTER

SET

POINT

➄

EXIT

SCALENUM

➄

EXIT

PEAKHOLD

≈

ENTER

ASSGN F2

Some functions are not available on NIST and OIML configured 3750s.

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SECTION 3 – ID CODES

• The 3750 can store 12 ID codes (or up to 350 with optional memory, see options Appendix A).

• Each ID Code stores a Tare Value, a Total Value, a weighment counter, display mode (Net, Gross, Peak, etc.), Unit (lb, kg, ton, etc.), and two 20 character ID code print strings. With the optional Statistics Package, each product code also computes and stores Average, Min., Max., Standard Deviation, and Coefficient of Variance.

• Product Codes are created when a new name is entered by the user. The name can be all numbers, all letters, or a combination of numerals and letters. Once the name is entered by the user, the 3750 scans its memory to see if the ID Code already exists. If it does, all new totaled weighments are added to the previously totaled weighments, and any preexisting Tare value will be used for NET weight computation. If the name did not already exist, the 3750 creates a new ID Code.

• ID Codes are alphabetized when created using the standard ASCII convention.

• The 3750 provides a way to scroll through all existing ID Codes as an alternate means of selecting an existing ID code.

ID CODE ORGANIZATION

Total Counter

Print String 1 (20 Char)

Total Register

Display Mode

Average Wt

Minimum Wt

Maximum Wt

Standard Deviation

Coef of Variance

Total Register

ID CODE NAME

Up to 8 Characters

ID CODE NAME

Up to 8 Characters

Tare Register

Print String 2 (20 Char)

Up to 350

ID Codes

12 Standard

ID Codes

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Used to Initiate ID Code entry.

is the default ID# key. The location of ID# can be changed with the Function Key

Setup procedure.

Key Functions during ID Entry

Used to enter characters. If pushed twice Enter also functions as “EXIT and SAVE”.

Pushing the EXIT key will terminate the data entry and cause any changes made to be canceled. “EXIT and don’t SAVE”.

Clear. Will erase any character the cursor is positioned on and move the remaining characters to the left.

Note: Pushing CLEAR followed by the

LEFT

Cursor key will clear the entire data line.

Left and Right Cursor Keys. Use to position the cursor under characters to be edited. Use the Right Cursor as a space character.

In Alpha mode, the space key provides space and punctuation marks: @ ! “ # $ % & ‘ ( ) * +, – . / : ; < = > ? [ \ ] ^ _ `

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.

The ALPHA Key is used to change the data entry from Numeric to Alphanumeric. The LCD indicates “n” for numeric entry, “U” for upper case Alphanumeric, and “L” for lower case Alpha-numeric.

Alpha-numeric Keys. When the Alpha key is in the “n” condition, these keys provide direct numeric digits. When the Alpha key is in the “U” condition, the keys provide the letters and number. For example, the 2 key provides “D”, “E”, “F”, and “2” in rotation.

Up and Down Scroll keys (numeric mode). Used to scroll through the available character set. Using the Scroll keys can be an alternate to using the Alpha-numeric keys. They provide a convenient way to change, for example, a 1 to a 2.

Used to insert characters within a string. Position the cursor over the character you wish to insert in front of, then push the NET/GROSS key. The “highlight” character will appear on the current position. Pressing the DOWN Scroll key will delete the current character. Pressing the UP Scroll key will insert a character.

ID#

ENTER

EXIT

SETUP

ALPHA

SPACE

@YZ

➠

ABC

ZERO

EXIT

INSERT

B/G

NET/GROSS

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General Alpha-numeric Entry Procedure

1) Use the Aa1 (ALPHA) key to switch between numeric “n”, upper case “U”, or lower case “L”.

2) Press the desired character key. If a “B” is needed, push the ABC1 key twice.

3) Enter the displayed character by either pushing a different key, or the

ENTER key. If, for example, two “B”s in a row are needed, use the ENTER key.

4) Terminate the character string by pushing ENTER twice.

Note: Some lower case characters can not be properly represented on the 16 segment displays. Lower case letters with descenders may be represented with the upper-case equivalent on the LCD. However, when the ID Code is printed or transmitted to a computer, the proper lower case character will be sent. Font Substitutions: “F” for “f”, “P” for “p”, “X” for “x”,

1) Push ID# (usually F1). The current ID is

displayed.

2) Push the first digit of the new ID Code. In this example, the ID Code will be "567".

3) Push the second and third numbers.

Note: So far, the Enter key has not been necessary.

4) Push the ENTER key twice to terminate the ID Code entry. The 3750 pauses while checking its memory for a match. If no match is made the display reads "ADD ID".

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.

➀

ID#

➁

MNO

SETUP

➂

PQR

STU

SETUP

√

ENTER

SETUP

√

ENTER

SETUP

➄

USING ID CODES

To Create a New ID Code (Numeric example)

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To Create a New ID Code (Alpha example)

1) Push ID#. The current ID is displayed.

2) Push the Aa1 (ALPHA) key to enable the

Alphanumeric keys. The rightmost numeric digit displays a “U” indicating Upper Case. In this example, the ID Code will be “TEST 1a”.

3) Enter in the word “TEST”. As the “S” and “T” are on the same key, this is a good illustration of how to handle this situation. Push the STU7 key twice to get the “T” to appear.

4) Push the DEF2 key twice for an “E”. Note: So far, using the Enter key has not been necessary.

5) Push the STU7 key for an “S”.

6) Now, in order to get the next “T” to appear, the ENTER key must be pushed so that the cursor will move on to the next character position.

7) Push the STU7 key twice to get the “T” to appear.

8) Push the SPACE 0 key to input a space.

9) Push the ABC1 key four times to get a “1” to appear.

Note: Alternately the Alpha key could be pressed to numeric mode “n” to input a 1.

➀

ID#

➁

ALPHA

SETUP

➂

STU

➂

STU

√

DEF

√

DEF

➄

STU

TES

≈

ENTER

TES_

∆

STU

TESS

∆

STU

TEST

➇

SPACE

TEST_

➈

ABC

TEST A

➈

ABC

TEST B

➈

ABC

TEST C

➈

ABC

TEST 1

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To Access an Existing ID Code (Numeric only example)

The process of accessing an existing ID Code is identical to the process of creating a new ID Code. When the 3750 detects an ID Code entry it always checks to see if the Code already exists.

10) Push the Aa1 (ALPHA) key to change to

lower case letters. An “L” will indicate the change.

11) Push the ABC1 key for a lower case “a”.

12) Push the ENTER key twice to terminate the

ID Code entry. The 3750 pauses while checking its memory for a match. If no match is made the display reads “ADD ID”.

13) The new ID Code appears briefly on the screen. Next, the 3750 returns to normal scale operation with the new ID Code. Any Tare value and new totals will be stored in the new ID Code.

ALPHA

SETUP

ABC

TEST 1a

ENTER

TEST 1a_

ENTER

SETUP

1) Push ID#. (Usually F1, can be changed with the Function Key setup procedure). The current ID is displayed.

2) Push the first digit of the new ID Code. In this example, we are searching for the ID Code “567” we used in the earlier example.

3) Push the second and third numbers.

Note: So far, no Enter key has been necessary.

➀

ID#

➁

MNO

SETUP

➂

PQR

STU

SETUP

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4) Push the ENTER key twice to terminate the

ID Code entry. The 3750 checks its memory for a match. When the match is made the message reads “FOUND ID”.

Note: If at this step, the message reads “ADD ID”, then the name was not entered the same way it was created. See “Deleting an ID Code”.

5) The 3750 briefly shows the ID number and then returns to normal scale operation. Any Tare value and new totals will be stored in the ID Code “567”. Total readings will be added to any existing totals previously stored on ID Code “567”.

√

ENTER

SETUP

√

ENTER

SETUP

➄

Default ID Code

The 3750 maintains a default ID Code that functions identically to user entered ID Codes except that no name is required. Any totals taken in the default ID Code are included in the grand total. The best way to recognize that the default code is in operation is that it has no ID Code name. The default ID Code can be given a name using “SETUP ID CODES”, but it will not be alphabetized, it will always be first on the list.

Note: The default ID Code is number 1, therefore using the @C command (see section 7) will always start with #2 for user entered ID Codes.

To Scroll through Existing ID Codes

1) Push ID# (Usually F1, can be changed with the Function Key setup procedure). The current ID is displayed.

2) Using the UP or DOWN Scroll key, scroll through the available IDs.

Note: The UP key progresses forward through the alphabet. The DOWN key back steps alphabetically. The ID# Key will also function as the UP Scroll key.

3) When the desired ID Code appears, push the ENTER key to select the ID Code. The 3750 returns to normal scale operation with the new ID Code “AARDVARK” (for example) active. Any Tare value and new totals will be stored in the ID Code “AARDVARK”.

➀

ID#

➁

TEST 1a

➁

ZZZZZZZZ

➁

AARDVARK

➂

ENTER

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To Delete an ID Code

Note: This procedure will delete the current ID as displayed on the message line. Recall or scroll to the ID Code you wish to delete using either of the two methods detailed previously.

1) Push ID#. The current ID is displayed.

2) Push the CLR key. The message “CLR 1

ID” appears.

3) Push ENTER to delete the ID Code. The

previous ID Code is deleted and the next ID Code (alphabetically) will become active. Note: Push EXIT instead of ENTER to cancel the ID Code delete.

➀

ID#

➁

ZERO

➂

ENTER

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To Delete all ID Codes

The following procedure deletes all existing ID Codes and any totals and statistics stored in them. To delete just the Totals and Statistics while otherwise leaving the ID Code intact, see “To Clear All Totals” (in section 4, pg.42).

WARNING

1) Push ID#. The current ID is displayed.

2) Push the CLR key. The message “CLR 1 ID” appears.

3) Push the CLR key again. The message “CLR ALL” appears.

4) Push ENTER to delete all the ID Codes (and Total & Statistics Registers). The 3750 double checks your intent with an “R U SURE” screen.

Push EXIT or any other key to cancel Delete All ID Codes.

5) Push ENTER again to complete the Clear function. It can take a while to clear all the registers. The 3750 indicates “WAIT” while this is occurring. Once finished deleting, the 3750 returns to the scale mode with the default ID code activated.

➀

ID#

➁

ZERO

➂

ZERO

√

ENTER

SETUP

➄

ENTER

When the 3750s ID Code memory is full this screen appears if you try to enter a new ID Code.

Memory Full

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SETUP ID CODES

Allows Front Panel setup of ID Codes features. The 8 character ID Name can be edited, two 20 character print strings can be assigned to each ID Code, and the Numeric Display mode can be modified. In addition the display mode for the desired ID code can be changed to a PER CENT reading or the display can be turned off.

ID STRING 1

Enter up to

20 Char's

NORMAL PER CENT DISABLED

NUM DISP MENU

ID CODE

SETUP MENU

ID NAME MENU

INPUT ID NAME

NUM DISP

ID NAME STRING 2

ENTER

(Usually F1)

ID STRING 2

Enter up to

20 Char's

STRING 1

ENTER

EXIT

SETUP

ID #

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1) Push SETUP followed immediately by the

ID# key (usually F1). The message display

reads “ID NUMBR”.

2) Press ENTER. The display reads “ID NAME”.

3) Push ENTER to go to the edit screen.

4) The message display will show the far left character blinking. Use the LEFT/RIGHT Cursor keys to select the character you wish to edit. Use the UP/DOWN keys or use the standard Alpha-Numeric entry procedure to change the letter(s). When finished editing, push the ENTER key twice.

See “General Alpha-Numeric Character Entry Procedure”.

5) The display reads “ID NAME”. Press EXIT to return to normal weighing mode or press

UP or DOWN to reach the next selection..

➀

EXIT

SETUP

➀

ID#

ID NUMBR

➁

ENTER

ID NAME

➂

ENTER

Current ID Name appears

√

...to select char.

√

EXIT

...to scroll char.

√

ALPHA

ABC

...to input char.

√

ENTER

...to finalize edit.

ID NAME

➄

EXIT

SETUP

ID NAME The name of each ID Code can be changed as desired using the scroll keys, cursor keys, and the Alpha-numeric keys. This menu item is not used for initial ID Code name entry (see ID CODES). If the name is edited, it might no longer be in alphabetical order.

To Edit the current ID Code Name

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To Change the Numeric Display Mode

Use of the “DISABLED” mode can cause confusion as the weight reading blanks out. Be sure this is what you want to do before disabling the display. If the numeric display is blanked out, push the

SETUP

key twice,

up key to NUM DISP, push

ENTER

, up key to “NORMAL”, push

ENTER

push

EXIT

to return to normal operation.

CAUTION

1) Push SETUP followed immediately by the

ID# key. The message reads “ID NUMBR”.

2) Push ENTER to access the menus.

3) Push UP until the message reads “NUM DISP”.

4) Push ENTER. The message indicates the first “NUM DISP” menu choice – “NORMAL”.

5) Select the “NORMAL”, “PERCENT”, or “DISABLED” display modes by using the

UP/DOWN keys to scroll through the

choices. In this example, we’ll pick the “PER CENT” mode.

6) Push ENTER to set the Number Display mode.

7) You are back in the SETUP ID# menu. Return to normal scale operation (in PER CENT) by pushing EXIT .

➀

EXIT

SETUP

➀

ID#

ID NUMBR

➁

ENTER

ID NAME

➂

NUM DISP

√

ENTER

NORMAL

➄

PER CENT

≈

ENTER

NUM DISP

∆

EXIT

SETUP

NUM DISP The function of the numeric (weight) display can be modified. The “NORMAL” setting displays standard NET or GROSS weight. The “PERCENT” setting turns the numeric display into a percentage weight meter. In the PERCENT mode, the 0% and 100% values are determined by the BARGRAPH settings (see “BARGRAPH MENU” for setting the 0% and 100% values). You must set the 0% and 100% values for the PERCENT mode to function. The “DISABLED” mode turns off the weight display altogether. This would be used when only the bargraph is desired or the meter is used to check set points only.

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1) Push SETUP followed immediately by the

ID# key. The message reads “ID NUMBR”

2) Push ENTER to access the menus.

3) Use the UP key to find the desired ID Code String (“STRING 1” or “STRING 2”).

ID CODE STRING 1 & STRING 2

Each ID code can be further identified with one or two ID Code Strings. A string is simply a set of alphanumeric characters that can be displayed and/or printed. The ID Code Strings differ from the ID Code Name in that they are only used in conjunction with the RS-232 option and can’t be displayed on the Message display (except during the text entry process). Each string can be up to 20 characters in length. The MSI “@ codes” can also be embedded in the string which provides an extremely versatile output capability. See Section 7 – Comm Ports for more details on programming “@ codes”.

Use the ID Code Strings to set up a print string that changes with every ID code. Combined with the standard Comm Port print strings, the Code Labels can be used to design a very sophisticated bar code label with three fields that change with every ID Code – the ID Code Name, and ID String 1 and 2.

The entry procedure for ID Code Strings is identical to the Name procedure, except that you are not limited to 8 characters. After the first 8 characters are entered, the letters will scroll to the left.

The Function keys can be programmed to allow one button access to 1 or both ID Strings. This can be used for Operator ID entry, or direct access to the label printer data when the ID string is embedded in the main Comm Port output.

To Add or Edit an ID Code String

Select the ID Code you wish using the procedure "To Access an Existing ID Code" (page 26-27)

➀

EXIT

SETUP

➀

ID#

ID NUMBR

➁

ENTER

ID NAME

➂

NUM DISP

➂

STRING 1

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4) Push ENTER.The current string (if any)

will be displayed.

5) The message display will show the far left

character blinking. Use the LEFT/RIGHT Cursor keys to select the character you wish to edit. Use the UP/DOWN keys or use the standard Alpha-Numeric entry procedure to change the letter(s). When finished, push the ENTER key twice. (See “General Alpha-Numeric Character Entry Procedure”)

Note: The characters will scroll left or right when the string is larger than 8 characters. Use the LEFT or RIGHT cursor keys to maneuver through the string.

√

ENTER

➄

...to select char.

➄

EXIT

...to scroll char.

➄

ALPHA

ABC

...to input char.

➄

ENTER ENTER

...to finalize

edit.

To Access the ID Code Strings with the FUNCTION keys

For this procedure to function, a FUNCTION key must be programmed for “STRING 1” and/or “STRING 2”. The key(s) used for this purpose can be labeled to suit your needs (e.g. “CUSTOMER” or ‘OPERATOR”, etc.) See Section 2– Function Keys, for details.

1) Push the FUNCTION key once to access a

STRING. The current string (if previously entered) will display.

F3 shown for example only. Use the key you programmed for the STRING entry.

2) The current string is displayed. Use the UP/

DOWN keys to enter characters. Push ENTER when the desired character is

displayed. Use the LEFT and RIGHT cursor keys to move the cursor to allow editing the String. When finished, push the

ENTER key twice.

See “General Alpha-Numeric Character Entry Procedure”.

➀

STRING 1

➁

ABC

@YZ

...for numbers.

➁

ALPHA

ABC

...to input char.

➁

ENTER ENTER

...to finalize

edit.

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SECTION 4 – TOTAL / STATISTICS

TOTAL

• The 3750 can add independent weighments together and keep a counter of how many weighments were added (Totaled). The Weighments counter can be thought of as a box or palette counter.

• “TOTAL” always uses the displayed weight, so gross and net readings can be added into the same total.

• There are two modes of Totaling which are set in the SETUP TOTAL section. The Manual mode uses the TOTAL key to add the current weight to the previously totaled value. The Auto mode will automatically add the last, settled value to the total (or optionally the highest value). See “SETUP TOTAL” for instructions to enable the AUTO TOTAL modes.

• Both modes have a means to prevent the same load from totaling twice. Once totaled, the load must be removed from the scale before a new load can be added to the Total. Applied weight must be greater than the Total Threshold before it can be totaled. See “SETUP TOTAL” for instructions on how to set the Total Threshold.

To Total with the TOTAL Key

(Unit must be setup to Manual Total mode)

Rules for use:

1) The motion annunciator must be off, the scale must be stable unless motion

is disabled in the Setup Total menu.

2) Only positive readings can be accumulated.

3) The scale adds the current reading (relative to the Net zero or Gross zero

depending on mode) to the contents of the accumulate register.

4) After a weighment is totaled, the weight must go below the Total Threshold

before another weight can be added to the total. This assures that a weight on the scale is only added to the total once.

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

1) Place the weight to be totaled on the scale. When the weight has stabilized, push the

TOTAL Key (usually F3). The current

weight is added to the total register. The display gives an indication of how many weighments have been totaled. i.e. 1 TOTAL, 2 TOTAL, …x TOTAL.

TOTAL

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display overflow. The larger numbers can be printed through the use of the

PRINT button, or with a computer hookup.

AUTO TOTAL

SETUP Option, see “SETUP TOTAL” to enable Auto Total.

When the weight exceeds the Total Threshold the total function operates automatically. The displayed weight is held in a holding register and added when the weight returns below the Total Threshold. When a weight settles (no motion), the Total LED indicator will flash three times. If the weight changes to a new settled value the LED will flash again indicating that the previous settled reading has been replaced. The last settled reading is what will be used for totaling when the scale returns below the Total Threshold. The user must make sure that while removing the load the scale does not stabilize enough for a new reading or an erroneous weighment addition could occur. The last settled weight is actually added to the total when the scale returns to below the Total Threshold. The “AUTOPEAK” total mode works the same, except that the highest settled reading will be used for totaling on return to zero, rather than the last settled reading.

Auto Total Operation

1) Enable the Auto Total mode in the “SETUP TOTAL” menu (see “SETUP TOTAL”). Select either the “AUTONORM” or the “AUTOPEAK” mode. Exit from the setup menu.

2) Use the TOTAL key to disable (“TOTALOFF”) or enable (“TOTAL ON”) Auto Total.

3) Place the weight to be totaled on the scale. The Total LED will flash three or more times when the weight is settled. In high speed operations it is not necessary to wait for the three flashes. The total is accepted when the first flash appears.

4) Remove the weight. The screen will read “x TOTAL” where x is the number of totaled weighments.

Note: The total key is used as a Total On, Total Off, toggle key which is indicated briefly on the message display (i.e. “TOTAL ON” or “TOTAL OFF”). Auto Totaling will only occur in the TOTAL ON mode. The Auto Total On mode is indicated by an “AUTO ∑” annunciator on the LCD. This feature allows the user to turn off Auto Total for periods in which the scale needs to be used without adding to the total. Turning the Auto Total off does not erase the current total. See “To Clear the Total Value” to learn how to erase the Total.

Rules for Auto Total:

1) Cannot be in motion. An Auto Total acceptable reading is indicated by three or more short flashes of the Total LED.

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.

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TOTAL Menu (SETUP TOTAL)

Allows Front Panel entry of Totalization parameters.

∑ MODE The Manual mode requires that the TOTAL key (or IR Remote Total key) is pushed when the weight currently on the scale should be added to the previously accumulated value. The Auto Norm mode will automatically add the last, settled value to the total. The Auto Peak mode will automatically add the highest settled value to the total. All total modes require that the scale returns below the Total Threshold before the next weighment can be added. Applied weight must be greater than the Total Threshold before it can be totaled. See TOTAL for more details. In NIST or OIML standards, the AUTOPEAK and AUTONORM selections will not appear unless you enable AUTO Total in the Calibartion Setup menu. The use of AUTOTOTAL must be approved per application by the sealing official. ∑ MOTION Enables or disables Motion Detection for Manual Total. Has no effect on AUTOTOTAL. This menu item controls whether the scale has to be out of motion before it will total. In certain high vibration applications it is sometimes desirable to turn off the motion detect so that Totalization can occur. This feature is disabled for legal-for-trade systems. ∑ THRESHOLD Sets the weight value above which Totalization is allowed. For example, setting the threshold to 10% on a 200 lb scale will set the threshold at 20 lb. Only weight above 20 lb will add to the Total. Once totaled, the weight must return below the 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

MANUAL TOTAL MOTION DETECT

ENABLED DISABLED

KEY IN 0 to 100% THRESHOLD

TOTAL THRESHOLD

TOTAL SETUP MENU

∑ MOTION

∑ THRESH

(Default F3)

ENTER

TOTAL MODE MENU

DISABLED AUTOPEAK AUTONORM MANUAL

ENTER

∑ MODE

0-9

EXIT

SETUP

TOT AL

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Total all weight that exceeds 50kg. Since 50kg is 5% of 1000kg, the Total Threshold is set to 5%.

Note: The Threshold is entered in 1% increments.

To Set the TOTAL MODE

The following example assumes the F3 function key is programmed to “TOTAL”. If the TOTAL key has been moved to a different “F” key use that key for the following procedure.

1) Push SETUP followed immediately by the

TOTAL switch (usually F3).

2) Push ENTER. The first menu choice is

“MANUAL” (or the last set mode). In this example, we’ll enable the “AUTONORM” mode.

3) Push the UP or DOWN key to scroll

through the Total Mode options. Shown here are all the Total Mode Options to illustrate how the menu structure works. It is not necessary to go through all options.

4) When the desired choice is displayed, push

ENTER. The ENTER key should be

pushed after the LCD indicates “AUTONORM”.

5) Push the EXIT key to return to normal

scale operation. Auto Total is now enabled. The small “AUTO ∑” annunciator will appear.

➀

EXIT

SETUP

➀

TOTAL

∑ MODE

➁

ENTER

MANUAL

➂

AUTONORM

➂

AUTOPEAK

➂

DISABLED

➂

MANUAL

√

ENTER

∑ MODE

➄

EXIT

SETUP

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To Set the Total Threshold

To Turn Off Auto Total

It is often desirable to temporarily turn off Auto Total.

To Turn On Auto Total

Return to Auto Total operation.

1) Push TOTAL. The display reads

“TOTALOFF” and the small “AUTO ∑” annunciator turns off. Then the scale resumes normal operation but will not Total.

TOTAL

1) Turn on Auto Totaling by pushing the

TOTAL key. The display will read

“TOTAL ON” and the small “AUTO ∑” annunciator will appear.

TOTAL

∑

AUTO

1) Push SETUP followed immediately by the

TOTAL switch (usually F3).

2) Push the UP Scroll key until the menu

choice is “∑ THRESH”.

3) Push ENTER. The % Threshold Screen

will appear. The currently set threshold is displayed on the Weight Display.

4) Use the numeric keys to input the desired Total Threshold. Remember that the threshold is based on per cent of Scale capacity. In this example we’ll input 2% as a threshold.

Calculation example – If the Scale Capacity is 1000kg and the user wishes all weight above 50kg totaled, enter 5% (1000 x 0.05).

5) After the number is finished push ENTER.

6) Push the EXIT key to return to normal scale operation.

➀

EXIT

SETUP

➀

TOTAL

∑ MODE

➁

∑ THRESH

➂

ENTER

√

DEF

➄

ENTER

≈

EXIT

SETUP

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MSI-3750 Digital Weight Indicator

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To Enable/Disable Total Motion Detect

VIEW TOTAL

Displays the current Total value of the selected ID and allows the total(s) to be cleared.

The following examples assume the F4 function key is programmed to “VIEW TOTAL”. If the

VIEW TOTAL

key has been moved to a different F key use that key for the following

procedure.

To Display the Current ID’s Totaled Weight

1) Push SETUP followed immediately by the

TOTAL switch (usually F3).

2) Push the UP Scroll key until the menu

choice is “∑ MOTION”.

3) Push ENTER.

4) Change the state of Total Motion detect

with the UP key.

5) When the desired mode is displayed, push

ENTER.

Note: Total Motion has no effect on AUTO TOTAL. It is for use with MANUAL TOTAL only.

6) Push the EXIT key to return to normal

scale operation.

➀

EXIT

SETUP

➀

TOTAL

∑ MODE

➁

∑THRESH

➁

∑MOTION

➂

ENTER

ENABLED

√

DISABLED

➄

ENTER

≈

EXIT

SETUP

Push VIEW TOTAL. The totaled weight and the number of weighments will be displayed for 4 seconds.

VIEW TOTAL

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To Erase the last Totaled Weight

If the last totaled (automatic or manual) weighment was a mistake, it can be erased with the following procedure. This erases only the last weighed value.

1) Push VIEW TOTAL, (usually F4), then

CLR (ZERO). The message reads

“x TOTAL” (where x is the number of totaled weighments), then “CLRLAST∑”.

2) Press ENTER. The last weight totaled is

subracted and the number of weighments counter is reduced by one.

If you change your mind, push EXIT to cancel the Clear Last Total operation.

➀

VIEW TOTAL

➀

ZERO

➁

ENTER

To Clear the Total Value (Current ID Code only)

Note: At any time during the following procedure the

EXIT

key cancels the Clear

operation.

1) Push VIEW TOTAL, (usually F4), then

CLR (ZERO). The message reads

“x TOTAL” (where x is the number of totaled weighments), then “CLRLAST∑”.

2) Press CLR again. The message reads

“CLEAR ∑”.

3) Press ENTER. The total reading and the

number of weighments counter will revert to zero.

If you change your mind, push EXIT to cancel the Clear Total operation or push CLEAR to go back to the “CLRLAST∑” mode.

➀

VIEW TOTAL

➀

ZERO

➁

ZERO

➂

ENTER

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CLEAR ALL TOTALS

Allows Clearing all totals (and Statistics registers) on all ID codes at once.

To Clear All the Totals of all ID Codes at once.

1) Push SETUP followed immediately by the

VIEW TOTAL switch (usually F4).

2) Push ENTER to Clear all the Total

Registers (and Statistics Registers) of all ID Codes. The 3750 double checks your intent with an “R U SURE” screen.

3) Push ENTER again to complete the Clear

function. It can take a while to clear all the registers. The 3750 indicates “WAIT” while this is occurring.

WARNING! This will completely erase all Total and Statistics registers for every ID Code at once. If this is not what you want to do, push EXIT .

➀

EXIT

SETUP

➀

VIEW TOTAL

SETUP

➁

ENTER

SETUP

➂

ENTER

STATISTICS (OPTION)

The Statistics option works in conjunction with the Total function and adds MIN, MAX, Average, Standard Deviation, and Coefficient of Variance. All these computations are kept for every ID Code independently. The number of samples that statistics can be calculated for is limited only by memory requirements and will vary from a few thousand to >100000 samples. Individual samples are not stored. If needed, individual samples can be logged through either RS-232 port using the “PRINT on TOTAL” function.

A “GRAND TOTAL” function is also included with the Statistics option. The Grand Total adds all the weight in all the ID Codes and provides the following information: GRAND TOTAL, Number of Totals, and the Overall Average (GRAND TOTAL divided by Number of 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.

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DEFINITIONS AND FORMULAS

AVERAGE – is computed by dividing the total by the number of samples. MIN – is a single weight register that records the minimum weighment that was

added to the total. MAX– is a single weight register that records the maximum weighment that was

added to the total. STANDARD DEVIATION – is a measure of how widely values are dispersed

from the average value (the mean). The 3750 uses the “non-biased” or “n-1” method that is based on sampling a portion of each available weighment.

Standard Deviation uses the following formula where x is equal to the total, and n is equal to the number of samples.

nx x

∑∑

−

()

−

()

COEFFICIENT OF VARIANCE – is a relative dispersion calculated from the sample standard deviation and the mean with the following formula:

100 StdDev

Average

()

GRAND TOTAL – is computed by adding together the totals of all the ID Codes (adjusted to the default unit set in calibration if necessary).

GRAND AVERAGE – is computed by dividing the Grand Total by the number of samples of all the ID Codes.

Units and the Statistics Registers Due to the mathematical interaction of the Statistics Registers, only one unit (lb, kg, etc.) is available across all the ID Codes. So unlike standard ID Codes without statistics, once a total has been taken in any ID Code the units function is locked. 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.

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MSI-3750 Digital Weight Indicator

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1) Push STATS (usually F2). The first

statistic displayed is “AVG WGT”.

Note : The STATS key will not function until weight has been totaled in the current ID Code.

2) With a suitable printer or computer attached

to the COMM Port1, push PRINT.

➀

EXIT

STATISTICS

➁

1) Push STATS (usually F2). The first

statistic displayed is “AVG WGT”.

Note : The STATS key will not function until weight has been totaled in the current ID Code.

2) Push STATS (F2) again. The second

statistic is the Minimum Weight.

3) Push STATS (F2). The third statistic is the

Maximum Weight.

4) Push STATS (F2). The fourth statistic is

the Standard Deviation.

5) Push STATS (F2) again. The fifth statistic

is the Coefficient of Variance.

6) Push EXIT to return to normal scale

operation.

➀

EXIT

STATISTICS

➁

EXIT

STATISTICS

➂

EXIT

STATISTICS

√

EXIT

STATISTICS

➄

EXIT

STATISTICS

≈

EXIT

SETUP

USING STATISTICS

To View Statistics for the current ID Code

The following example assumes F2 was programmed to be “STATS”. Use the

VIEW TOTAL

key for the T otal and number of samples.

To Print the Current ID Code’s Statistics

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1) Push GRAND TOTAL (F5). The first

statistic displayed is the Grand Total obtained by adding the totals of all product codes.

Note : The GRAND TOTAL key will not function until weight has been totaled in at least 1 ID Code.

2) Push GRAND TOTAL (F5) again. The

second statistic is the number of samples.

3) Push GRAND TOTAL (F5). The third

statistic is the Grand average weight.

4) Push EXIT to return to normal scale

operation.

➀

GRAND ∑

➁

GRAND ∑

➂

GRAND ∑

√

EXIT

SETUP

To View the Grand Total and Average for all ID Codes

The following example assumes F5 was programmed to be “GRNDTOTL”.

1) Push GRAND TOTAL (usually F5). The

first statistic displayed is the Grand Total obtained by adding the totals of all product codes.

Note : The GRAND TOTAL key will not function until weight has been totaled in at least 1 ID Code.

2) With a suitable printer or computer attached

to the COMM Port1, push PRINT. All statistics plus the Grand Total statistic will print. Product Codes that have no Totaled Data will not print out in this procedure.

➀

GRAND ∑

➁

➀

VIEW TOTAL

➀

1) Push VIEW TOTAL (usually F4) followed

quickly by the PRINT key. Just the Total and the number of samples will print.

To Print the All Product Code’s Statistics

To Print the Current Product Code’s Total Only

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SECTION 5 – 3750 METER SETUP

MAIN SETUP MENU

Allows the user to set the A/D filter, the display contrast, the Time and Date, and program the Function keys

(

see section 2 for information on programming the function

keys

)

. Setup Functions are organized into Menus. You navigate through the

menus using the UP or DOWN Scroll keys. You select menu items using the

ENTER key. Pushing the EXIT key will step back one menu level at a time and

is used to return to normal scale operation. Using the EXIT key at the Selection level voids any change in the active menu.

NOTE: Not all the selections above are activated on every MSI 3750. Legal-for-trade issues and application issues require certain menu items to be under the 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).

ASSGN F5 ASSGN F4 ASSGN F3 ASSGN F2 ASSGN F1

TIMEDATE MENU

CLOCK MODE SET

MAIN SETUP MENU

ENABLED DISABLED

CONTRAST

8 STEPS ADJUST

FILTER MENU

HIGH MEDIUM LOW

CONTRAST

FILTER

ENTER

KEY FCTN

TIMEDATE

DATE TIME WEEKDAY

INPUT MM/DD/YY

INPUT HOUR:MIN

INPUT 1=SUN 2=MON 3=TUES 4=WED 5=THUR 6=FRI 7=SAT

EXIT

SETUP

EXIT

SETUP

VIEW ∑ UNITS TOTAL TEST STATS SETPOINT SCALE ID PEAKHOLD ID NUMBR GRNDTOTL DISABLED

KEY FUNCTION

24HR/SEC 24HR/MIN1 2HR/SEC 12HR/MIN

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FILTER

Use the LOW setting for most scale applications. It settles fastest and is intended for general use. Use the MEDIUM setting when the scale is being used under conditions that cause light to medium swinging. Use the HIGH setting when there is a lot of scale motion or vibration. There is a time penalty to pay for using the HIGH setting. The user should wait at least 5 seconds to ensure that the final reading has settled (Motion indicator off).

Not available in some legal-for-trade systems or the FILTER menu is moved to the Calibrate Setup Menu.

To Change the Filter Setting

➀

EXIT

SETUP

2s delay

SETUP

➁

SETUP

➂

ENTER

SETUP

√

SETUP

➄

ENTER

SETUP

≈

EXIT

SETUP

1) Push SETUP. Wait 2 seconds (or push

SETUP again).The message reads “KEY

FCTN”.

2) Push the UP scroll key to change the menu

selection to “FILTER”.

3) Push ENTER.

4) Select the “LOW”, “MEDIUM”, or

“HIGH” filter by using the UP/DOWN keys to scroll through the choices. In this example, we’ll pick the MEDIUM filter which is suitable to medium to high vibration situations.

5) Push ENTER.

6) You are back in the SETUP menu. Return

to normal scale operation (MEDIUM Filter on) by pushing EXIT (SETUP).

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CONTRAST

Used to optimize the contrast of the LCD at various viewing angles. This is factory preset for optimal viewing. By stepping through the 8 settings, the contrast can be improved for off-angle or temperature extreme applications. If the display is ghosting (off segments are visible), use a lower setting such as 1-4. If the display is too dim, use a higher setting such as 5-8.

To Adjust the LCD Contrast

➀

EXIT

SETUP

2s delay

SETUP

➁

➠

➁

SETUP

➂

ENTER

SETUP

√

EXIT

SETUP

√

EXIT

SETUP

➄

ENTER

SETUP

≈

EXIT

SETUP

1) Push SETUP. Wait 2 seconds (or push

SETUP again).The message reads “KEY

FCTN”.

2) Push the UP scroll key until the menu

selection is “CONTRAST”.

3) Push ENTER.

4) Adjust the contrast by pushing the UP or

DOWN key. Push ENTER when the

desired display contrast is achieved. There are 8 steps. You can also change the contrast directly by pushing the 1-8 key.

5) Push ENTER.You are back in the SETUP menu.

6) Return to normal scale operation by pushing EXIT (SETUP).

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REAL TIME CLOCK/CALENDAR

A clock/calendar for full time and date stamping is installed with the RS-232 option. The Clock can be set to automate weighing functions to time and date. When the scale is not being used, a digital clock display can be enabled. The Real Time Clock / Calendar is adjusted in the Setup Menu. The 3750 RTC is fully Y2K compliant. The user can choose 2 or 4 digit year outputs.

To Set the Time and Date

➀

EXIT

SETUP

2s delay

SETUP

➁

➠

➁

SETUP

➂

ENTER

SETUP

√

ENTER

HOURMIN

➄

DEF

SPACE

GHI

SPACE

≈

ENTER

1) Push SETUP. Wait 2 seconds (or push

SETUP again).The message reads

“KEY FCTN”.

2) Push the UP scroll key until the menu

selection is “TIMEDATE”.

3) Push ENTER. The menu reads "SET".

4) Push ENTER again.The message reads

“HOURMIN”. The current set time is displayed.

5) Input the hours and minutes in 24 hour mode with the numeric keys. The seconds field is fixed at 00. In this example we’ll push 2, 0, 3 key 0 key to input 20:30 hours (8:30PM).

Note: To Sync the 3750 Clock with an external clock push ENTER precisely at the 00 second point. The 3750 Real Time Clock can also be synched to the second if set through the Comm Port by computer.

6) When the proper time is displayed, push

ENTER. You are back in the TimeDate

menu.

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Follow a similar procedure for the Date entry. The Date is entered in the order MM DD YY. When finished setting all the Clock/Calendar parameters, push

EXIT three times to return to normal scale operation. To ensure Y2K compat-

ibility, any two year digits between 80 and 99 are assumed to be in the 1900s. All year dates from 00 to 79 are assumed to be in the 2000s. MODE The MODE sets the display mode of the real-time Clock when the clock is enabled. Select “12HR/MIN” to display the time in 12 hour format with hours, minutes, and a PM indication. Select “12HR/SEC” to display the time in 12 hour format with hours, minutes, seconds, and a PM indication. Select “24HR/MIN” for 24 hour indication with hours and minutes. Select “24HR/SEC” for 24 hour indication with hours, minutes, and seconds. CLOCK Select “ENABLED” to turn the scale into a clock calendar when the power is not on. The Micro-processor wakes up to update the display either every minute or every second depending on the mode selected. The processor will also check for activity on the Comm Ports to see if a Power up command is received. Therefore to achieve no worse than a 1 second turn on, set the mode to the 12HR/SEC or the 24HR/SEC selection. The mode has no effect on the power switch.

Note: Operating the Clock from a battery powered MSI 3750 has very little effect on battery life. The LCD and LCD drivers use only minimal power. The µC is only awake long enough to update the LCD so its average power consumption is small. Using the /MIN mode selections minimizes the µP power drain.

SETUP POWER MENU

Allows Front Panel entry of parameters involving power consumption.

BACKLIGHT MENU

ON AUTO OFF

LOW MEDIUM HIGH

BACKLIGHT

BRIGHTNESS MENU

24 HOURS 8 HOURS 4 HOURS 2 HOURS 1 HOUR 30 MIN 10 MIN DISABLED

AUTO OFF MENU

POWER SETUP MENU

LIGHTING

BRIGHT

POWER

AUTO OFF

ENTER

SETUP

AUTO OFF The AUTO OFF feature when enabled prolongs the battery life of the scale by turning the power off after a set time of non use. 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

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on, only the power key (or Remote) will turn it off.

LIGHTING

A photoresistor detects ambient light and determines if the backlight should be on or off (AUTO mode). The “ON” mode turns the backlight on full time. For decreased power drain, the “OFF” mode disables the backlight.

To Turn on the Backlight

➀

EXIT

SETUP

➀

POWER

AUTO OFF

➁

LIGHTING

➂

ENTER

OFF

√

➄

ENTER

LIGHTING

≈

EXIT

SETUP

1) Push SETUP followed immediately by the

POWER key.

2) Push the UP key to select the menu item “LIGHTING”.

3) Push ENTER.The current Backlight mode is shown.

4) Push the UP key until the message reads “ON”.

5) Push ENTER. The backlight will turn on.

6) Push EXIT (SETUP) to return to normal scale operation or use the UP/DOWN and

ENTER keys to change another Setup

Power parameter.

BRIGHT

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.

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BARGRAPH MENU

Controls the operation and calibration of the Bargraph. The Bargraph can indicate relative weight. In conjunction with the “NUM DISP” setup mode, the BAR 0% and BAR 100% setting also control the numeric display PER CENT parameters.

The 0% and 100% points of the bargraph can be set to any weight within the capacity of the scale. Normally a lower weight is set for the 0% value. If desired, the 0% point can be set to a higher value than the 100% point if pour down or similar applications dictate.

BARMODE

The BARMODE menu has three settings:

1) LEVEL – Used only on the Magnum Lift Truck Scale. Indicates how level the vehicle is and if the level is within range for accurate weight readings.

2) PER CENT – The Bargraph represents a user programmed span of the weight reading. The 100% and 0% settings are programmable anywhere within the capacity of the scale.

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.

ENTER 100% VALUE

ENTER 0% VALUE

BARGRAPH

SETUP MENU

BARGRAPH

MODE MENU

LEVEL * PER CENT DISABLED

BARMODE

BAR 0%

BAR 100%

ENTER

0-9

EXIT

SETUP

CLR

ZERO

* Magnum LFT Scales Only

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➀

EXIT

SETUP

➀

ZERO

BAR MODE

➁

ENTER

MODEM

➂

PER CENT

√

ENTER

BAR MODE

➄

EXIT

BAR 0%

≈

ENTER

WEIGHT

∆

ABC

∆

SPACE

10_

➇

ENTER

BAR 0%

➈

BAR 100%

ENTER

WEIGHT

1) Push SETUP followed immediately by the

ZERO key. The Menu reads

"BAR MODE".

2) Push ENTER. The menu item will be the

current Bargraph Mode (defaults to "MODEM").

3) Push the UP key until the message reads

“PER CENT”. (How many times you push the UP key is dependent on the last mode set.).

4) Push ENTER.

5) Next , using the DOWN key, scroll to the

“BAR 0%” menu.

6) Push ENTER. The message display

indicates "WEIGHT" and the numeric display shows the current 0% value (defaults to 0).

7) Using the numeric keys enter the value that

you want to equal 0% on the bargraph. In this example we’ll key in 10lb (or whatever units the scale is in) as 0%.

8) Push ENTER.

9) Use the UP key to scroll to the the

“BAR 100%” selection.

10) Push ENTER.

To Set Up Bargraph Per Cent Operation

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Bargraph Resolution The bargraph has 20 segments plus under range and over range arrows. Each

segment is equal to a span of 5%. To calculate the resolution of each segment use the following formula.

100%Value - 0% Value

LOCK

The Lock function allows the user to lock various setups and or functions to prevent unauthorized changing or erasing of scale functions, features and statistical data. For added security an optional lock code (1-4 characters) can be entered. Once the MSI 3750 is locked the message “LOCKED” will appear whenever a locked function is tried. To unlock push SETUP NET/GROSS and enter the lock code number.

The “LOCKMODE” menu determines which functions/features are locked. For example, locking the SETUP key would prevent any setup functions from being used (except of course, the LOCK function (SETUP NETGROSS). There is no need to lock out functions that are only available on the Fx keys if no key is assigned to that function (e.g. PEAKHOLD). See “FUNCTION KEYS” for details on programming the Function Keys.

DEF

SPACE

20_

ENTER

BAR 100%

EXIT

SETUP

11) Using the numeric keys enter the value

that you want to equal 100% on the bargraph. In this example we’ll enter 20 lb as 100%.

12) Push ENTER...back to the MENU

level.

13) Push the EXIT (SETUP) key to return

to normal scale operation. The Bargraph is now activated. The 0% segment is equal to 10 lb, the 100% segment is equal to 20 lb.

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➀

EXIT

SETUP

➀

INSERT

B/G

NET/GROSS

LOCKCODE

➁

LOCKMODE

➂

ENTER

√

EXIT

➠

1) Push SETUP followed immediately by the

NET/GROSS key. The message display

reads “LOCKCODE”.

2) Push the UP key to select the menu item

“LOCKMODE”.

3) Push ENTER.The list of lockable items

appears. The numeric display indicates if the item is locked (Loc) or unlocked (UnLoc).

4) Use the UP or DOWN keys to scroll through the list. Use the LEFT or RIGHT cursor keys to toggle between locked and

Selecting Which Features to Lock

Note: You must set at least one item to “Loc” for the Lock Code to function.

LOCKMODE MENU

GRNDTOTL CLRLATCH ZERO VIEW ∑ UNITS TOTAL TEST TARE STRING 2 STRING 1 STATS SETUP SETPOINT SCALENUM PRINT POWER PEAKHOLD NETGROSS ID NUMBR

LOCK SETUP MENU

LOCK CODE ENTRY

ENTER UP TO 4 DIGIT CODE

LOCKMODE

LOCKCODE

ENTER

Loc UnLoc

EXIT

SETUP

INSERT

B/G

NET/GROSS

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unlocked.In this example we’ll lock out SETUP to prevent unauthorized changing of scale parameters. Use the DOWN key to scroll to “SETUP”.

5) Use the RIGHT cursor key to lock

“SETUP”. Use the UP/DOWN keys to scroll to any

other features you wish to lock or unlock. Use the LEFT/RIGHT keys to change the lock status.

6) Push EXIT (SETUP) to return to the Lock Menu, or push EXIT again to return to normal scale operation.

√

EXIT

➄

≈

EXIT

SETUP

➀

EXIT

SETUP

➀

INSERT

B/G

NET/GROSS

LOCKCODE

➁

ENTER

ENTRCODE

➂

ABC

➂

ABC

11_

➂

ABC

111_

√

ENTER

LOCKED

➄

EXIT

SETUP

1) Push SETUP followed immediately by the NET/GROSS switch. The message display reads “LOCKCODE”.

2) Push ENTER. The message reads “ENTRCODE”

3) Push ENTER if no security code is needed. If a custom lock code is desired, enter up to a four digit lock code with the

Numeric keys.

IMPORTANT! Make note of the code.

In this example, we’ll use “111” as a lock code.

4) Push ENTER to lock the 3750.

5) Push EXIT to return to normal scale operation. The LCD message reads “LOCKED” whenever a locked function is tried.

Lock Operation

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To Unlock

1) Push SETUP followed immediately by the NET/GROSS switch. The message display reads “LOCKCODE” .

2) Enter the Lock code with the Numeric keys.(the example lock code is 111) when finished, push ENTER. Note: If the lock code was empty just push ENTER and the scale will unlock.

➀

EXIT

SETUP

➀

INSERT

B/G

NET/GROSS

LOCKCODE

➁

ENTER

WARNING

If the lock code is lost, the calibration seal must be broken to reset and unlock the 3750. Follow the “RESET ALL” procedure then perform a complete calibration. MSI Service personnel can provide an unlock code if you are unable to recalibrate.

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SECTION 6 – SET POINTS

INTRODUCTION

The 3750 comes standard with 8 Software set points. The 3750 Meter can fill a variety of applications in control, batching, safety and informational warnings. Set points can also be used to trigger RS-232 data transmissions (see “COMM PORTS”). All the set point values can be changed directly from the front panel or downloaded from a computer or terminal via RS-232. All the set points put a message on the display or blink or blank the display. Set points 1 and 2 have front panel LED indication. Add the set points Relay Option for relay outputs. This option includes seven 115VAC 1A relays and an 8th logic output.

On dual input configured 3750s, each set point can be assigned to a single input A or B, the combination “A or B”, or the sum of the inputs A+B, designated as “A Ad b”.

SETUP SET POINTS MENU

DISABLED GRADING NORMAL

ALL SET POINTS

MODE MENU

SET PT 1 SET PT 2 SET PT 3 SET PT 4 SET PT 5 SET PT 6 SET PT 7 SET PT 8 OFF

SET POINTS

TEST MENU

VALUE DELAY MESSAGE DISPLAY WGT MODE LATCH

SET POINTS

PROGRAM MENU

TOTAL NETGROSS GROSS

INPUT UP to 20 CHAR's

GREATER LESSTHAN

ENTER

ABC

COMM 1 COMM 2 DISPLAY

ON OFF

ASSIGN MESSAGE

OUTPUT MENU

ENTER

ON OFF

BLANKLCD BLINKLCD NORMAL

INPUT SET PT VALUE

0-9

VALUE ENTRY

SCREEN

DEAD ZONE VALUE

SCREEN

MESSAGE ENTRY

DISPLAY MODE MENU

WEIGHT MODE MENU

0-9

INPUT DEAD ZONE VALUE

SP MODE 1-8

SET PT 1

SET PT 2

SET PT 3

SET PT 4

SET PT 5

SET PT 6

SET PT 7

SET PT 8

TEST SP 1-8

ENTER

ON OFF

OFF

A b

A or b

A Ad b

Multiple Input

Single Input

EXIT

INPUT DELAY IN SECONDS (1–1500s)

0-9

DELAY ENTRY

SCREEN

ENTER

EXIT

SETUP

EXIT

SET POINTS

EXIT

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➀

➠

➀

SETUP

➁

ENTER

DISABLED

➂

EXIT

GRADING

➂

EXIT

NORMAL

√

ENTER

➀

EXIT

SETUP

➀

EXIT

SET

➁

ENTER

1) Push SETUP followed immediately by the

SET POINTS key (usually F2).

2) Push the ENTER key. You are now in the

Setup Set Points Menu.

1) If necessary, use the UP or DOWN key to

scroll to the “SP MODE” menu.

2) Push the ENTER key. You are now in the

“SP MODE” menu. The current mode is displayed.

3) Use the UP or DOWN scroll key to select

the desired set point mode; NORMAL, DISABLED, or GRADING. In this example we will enable the set points as “NORMAL”.

4) Push ENTER to store your selection. You

are now back in the “SETUP SET POINTS” menu. Use the UP/DOWN keys to select the next set point menu or push

EXIT to return to normal scale operation.

Setup Set Points Menu Entry Procedure

SP MODE The SP MODE (All Set Points Mode) menu selection provides the Master enable/disable of set points. In addition, the set points can be configured in a “GRADING” mode, where each set point represents a grade threshold. The set points must be enabled in this menu to function.

All Set Points Mode Procedure

You must first be in the SETUP SET POINTS menu to proceed. See procedure above.

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SET PT1 THROUGH SET PT8

Set points are functional on the Front panel with LED anunciators (SP1-2) or messages (SP1-8). The MSI 3750 Relay Option Board adds up to 7 set point relay outputs and 1 external non-isolated logic output. These set points provide warnings and indications of weighing events. When the weight is above (greater than) or below (less than) a set value the 3750 can respond in a variety of ways:

• Turn on a relay.

• Blank or blink the Weight display.

• Send a message to the display.

• Send a message out either of the Comm Ports. These outputs are useful in batching and filling operations as well as safety related alarms. It is also easy to make window comparators by combining two set points. For example, program set point 5 for ≥50lb and set point 6 for ≤60lb. By combining the relay outputs, a window comparison for all weight between 50 and 60 lb has been created. See “Relay Applications” for more details. Another way to obtain window comparisons is to use the “GRADING” mode, however, all the set points become interactive.

Each set point has five sub-menus: “WGT MODE”, “VALUE”, “DISPLAY”, “LATCH”, and “MESSAGE”.

SET PT1 through SET PT8 (MAIN MENU LEVEL) On the main SETUP SET POINTS MENU level, each set point can be enabled on or off by using the scroll keys. Turning the set point off does not change any parameters set in the set point Program menus.

Dual Input Configured 3750s only:

On a dual input 3750, each set point can be set to “look” at either input or combinations of both inputs. There are 5 modes:

1) A – The set point compares to Input A.

2) b – The set point compares to Input B.

3) A or b – The set point compares to both Input A or Input B. If either input

meets the set point Value, the set point will trigger.

4) A Ad b – The set point compares to the sum of Input A and Input B.

5) OFF – The set point is disabled. Turning the set point off does not change

any parameters set in the set point Program menus.

WEIGHT MODE MENU The set point Weight Mode menu has three choices:

1) GROSS – In the “GROSS” mode the set point will operate at the value set

based on 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

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the “NET/GROSS” mode. In this mode the set point will operate at the value which represents either a Gross weight or a Net weight.

3) TOTAL – Set points can also be programmed to correspond to a Totaled Weight In the “TOTAL” mode you can enter a set point value greater than capacity.

DISPLAY MODE MENU The set point Response Menu is used to program what will happen when the set point becomes active. There are 3 choices:

1) BLINKLCD – The Weight Display will blink. This allows the weight still to be read while alerting the user that the set point is on.

2) BLANKLCD – The Weight Display will turn off. If you absolutely want to prevent weight readings when the set point is on.

3) NORMAL – The relay will change. Set points 1 and 2 also have a front panel LED indication. No other LCD indication is provided.

MESSAGE ENTRY The set point Message Entry screen allow the user to input a message of up to 20 characters. After inputting the message, you can assign the message to display on the LCD, and/or to transmit out either COMM Port. You can embed MSI “@ Codes” in the set point message that can cause the weight, time, date, etc., to print out the selected Comm Port. Messages displayed on the LCD are prioritized by the SP number. Set point 8’s message will take priority over SP1-7, Set point 7’s message will take priority over SP1-6, and so on. The most important message should be programmed into the highest used SP number.

DELAY The set point action can be delayed by entering a value from 1 to 1500 seconds. If the set point condition goes away before the delay time-out is completed, the set point action is canceled.

VALUE ENTRY The set point Value Menu is used to input the weight value for the set point. It also sets the sense of the set point…greater than (or equal to) or less than. Overload alarms should always use “GREATER”.

DEAD ZONE VALUE ENTRY After inputting the value, the 3750 allows entering a “Dead Zone” value (also known as hysteresis). The set point Dead Zone can be used to prevent relay chatter or to latch a set point over a specific weight range. 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

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➀

EXIT

➠

➀

EXIT

SETPT 2

➁

ENTER

➂

√

VALUE

➄

ENTER

GREATER

≈

LESSTHAN

1) Use the UP or DOWN key to scroll to the

set point (1-8) you wish to program.

2) Push the ENTER key. You are now in the

“SET POINTS PROGRAM MENU”. The LCD indicates if the set point is active (ON) or inactive (OFF).

In this example we’ll program set point 2, but the procedure applies for any set point.

3) Use the LEFT or RIGHT cursor key to

enable the set point. Dual Input 3750s: Use the LEFT or RIGHT Cursor keys to select A, B, A or B, A Ad b (Summed A+B)

4) The next step is to assign a weight value to

the set point. Use the UP key (if necessary) to scroll to the “VALUE” menu.

5) Push ENTER.

6) For a set point that will switch on when the weight is greater than or equal to the value

motor or solenoid. This can be prevented by using a dead zone to cause the set point to have one value for turning on, and a different value for turning off. For example: A set point set to ≥500 lb with a dead zone of 10 lb will turn on at ≥500 lb. It will not turn off until the weight goes below 490 lb (500–10). A set point set to ≤750 lb with a dead zone of 20 lb will turn on when the weight is ≤ 750 lb. It will not turn off until the weight is ≥770 lb (750+20).

Note: A Dead Zone value of zero is equal to 1/2 “d”.

SP LATCH MENU The set point Latch Menu is used to latch the set point relay on until it is cleared manually. There are two standard ways to clear a latched set point:

1) Program a function key to “RESET SP”.

2) Turn the 3750 off, then on again.

USING SET POINTS

Set Point Entry Procedure

You must first be in the SETUP SET POINTS menu to proceed. See procedure above.

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≈

GREATER

∆

ENTER

SETUP

➇

DEF

➇

SPACE

20_

➇

SPACE

200_

➈

ENTER

DEADZONE

MNO

SPACE

50_

ENTER

VALUE

DELAY

select "GREATER. For a "less than" set point, push the UP key to select "LESSTHAN". In this example we’ll program a overload warning set at ≥200lb so we will leave the sense at “GREATER”. LESSTHAN and GREATER are shown here for clarity. There is no need to use the

UP key to scroll to LESSTHAN if

GREATER is what you want.

7) Push ENTER to accept GREATER than as

the set point sensing mode. The weight entry screen now appears.

8) Input the desired set point Value with the numeric keys.

Note: Set point Values are limited to Capacity +5% unless the WGT MODE is “TOTAL”. Dual Input 3750s are limited to the sum of the capacity of Input A plus the capacity of Input B +5%.

9) Push ENTER to store your set point value.

10) You are now in the “DEAD ZONE VALUE MENU”.This step is optional. Skip to step 11 if a Dead Zone value is not needed (Dead Zone value of 0). Use the numeric keys to input the weight range desired for the Dead Zone.

In this example we desire a dead zone of 50 lb. The example set point will turn on at weights ≥200 lb and will turn off at weights ≤150 lb.

Note: The maximum value of the Dead Zone can not exceed the set point value. The error message “TOO BIG” will display.

11) Push ENTER to set the Dead Zone value. This is the end of the value entry for a set point. Now other parameters for set points can be entered.

12) This step is optional, skip to step 16 if a time delay is not needed. Push the UP key to the “DELAY” menu.

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ENTER

DEF

ENTER

DELAY

MESSAGE

ENTER

Refer to secton 7 for text entry

procedures.

COMPORT2

SCREEN

ENTER

MESSAGE

EXIT

DISPLAY

ENTER

NORMAL

13) Push ENTER. The “SPx DLAY” (where

‘x’ is 1-8) entry screen will appear.

14) Use the Numeric keys to input the delay

time in seconds. 1 to 1500 seconds. In this example we’ll enter a 2 second delay

which delays the set point responses. Note: If you input a number larger than 1500 the message “TOO BIG” will appear.

15) Push ENTER to set the delay time.

16) This step is Optional, skip to step 21 if a set

point Message is not needed. Push the UP key to the “MESSAGE” menu.

17) Push ENTER. The message entry screen

will appear.

18) Use the ALPHA, 1-9 and ENTER keys to

input a message up to 20 characters. You can include “@” codes for printing current weight, time, and date with the set point message. See the Comm Port Section 7 for details on entering the message. Refer to section 7 for text entry procedures.

19) After the text entry, you can assign the message to Commport1, Commport2, and/ or the LC Display “SCREEN”. Use the UP key to see the message assign choices. Use the LEFT Cursor key to change from “OFF” to “ON”.

20) After you have set all the message assignments, push ENTER to finish.

21) This step is Optional, skip to step 23 if blinking or blanking the display is not needed. Next, tell the set point how to display when the set point turns on. Use the

DOWN key to move to the “DISPLAY”

menu.

22) Push ENTER.The first menu choice will be the last set mode. In this case, the “RESPONSE” was set to “NORMAL”.

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EXIT

BLANKLCD

EXIT

BLINKLCD

ENTER

DISPLAY

EXIT

➠WGT MODE

ENTER

NETGROSS

GROSS

ENTER

WGT MODE

EXIT

SETUP

SETPT 2

to select another set point or

EXIT

SETUP

to return to scale operation.

23) For this example we’ll change the display mode to “BLINKLCD” by pushing the

DOWN key twice.

24) Push ENTER to store your choice. You are now back in the “SET POINTS PROGRAM MENU”.

See “DISPLAY MENU” above for a description of each menu choice.

25) Push the DOWN scroll key as necessary to locate the “WGT MODE” menu.

26) Push ENTER to go into the “WGT MODE” menu. In our example, we’ll have set point 2 respond to GROSS weight regardless of any Tare value. The first menu choice will be the last set mode. In this case, the set point was in the NETGROSS mode.

27) Use the UP or DOWN key to scroll through the menu choices.

28) When the desired choice appears push

ENTER to store your selection. You are

now back in the “SET POINTS PROGRAM MENU”. See “MODE MENU” above for a description of each menu choice.

29) This step is optional, skip to step 31 if you don’t need to enable the set point latch. Push the UP key to scroll to the “LATCH” screen.

30) Push the LEFT cursor key to toggle the set point latch “OFF” to “On”.

31) You are now back in the “SET POINTS PROGRAM MENU”. Push EXIT to return to the “SETUP SET POINTS” menu.

32) From here, you could scroll to another set point and repeat steps 1-30, or push EXIT again to return to normal scale operation.

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.

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➀

EXIT

SETUP

➀

EXIT

SETPOINT

➁

ENTER

➂

EXIT

➠

➂

EXIT

√

➄

EXIT

SETUP

1) Push SETUP followed immediately by the

SET POINTS key (usually F2).

2) Push the ENTER key. You are now in the

“SETUP SETPOINTS MENU.

3) Use the UP or DOWN key to scroll to the

set point (1-8) you wish to enable or disable.In this example we’ll enable set point 2, but the procedure applies for any set point.

4) Use the LEFT or RIGHT cursor key to

enable the set point. Dual Input 3750s: Use the LEFT or RIGHT Cursor keys to select A, B, A or B., A Ad b (Summed A+B).

5) Push EXIT to return to normal scale operation or use the UP or DOWN keys to scroll to other set points.

ENABLING / DISABLING SET POINTS

It is often useful to be able to set up a set point ahead of time and disable it for testing purposes.

To Enable or Disable a SINGLE Set Point

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➀

EXIT

SETUP

➀

EXIT

SETPOINT

➁

ENTER

SETUP

➂

ENTER

NORMAL

√

EXIT

DISABLED

➄

ENTER

≈

EXIT

SETUP

1) Push SETUP followed immediately by the

SET POINTS key (usually F2).

2) Push the ENTER key. You are now in the

“SETUP SETPOINTS MENU.

3) The “SP MODE” menu is the first selec-

tion. Push the ENTER key.

4) You are now in the “SP MODE” menu. The

current mode is displayed. Use the UP or

DOWN scroll key to select “DISABLED”.

5) Push ENTER to store your selection. You

are now back in the “SETUP SET POINTS” menu.

6) Push EXIT to return to normal scale

operation.

To Disable all Set Points

You must enable the set point menus to proceed. See procedure above.

To re-enable all the Set Points Follow steps 1-5 above except on step 4 select the “NORMAL” (or GRADING) mode. This does not override the settings of each set point. You must enable them individually if they were in the “OFF” condition.

USING THE MSI 3750 AS A GRADING SCALE

The MSI 3750 with or without the Set points relay option, can be set up as a multiple zone (up to 8) grading scale. The relay outputs can be connected to grading lights, or to automatic bins. In this example the 3750 will be used to grade in 6 zones, with additional over and under zones for a total of 8. In this example our grading zones are: <10 lb, 10 to 10.5 lb, 10.5 to 11 lb, 11 to 11.5 lb,

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.

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➀

EXIT

SETUP

➀

EXIT

SETPOINT

➁

ENTER

SETUP

➂

ENTER

NORMAL

√

EXIT

GRADING

➄

ENTER

1) Push SETUP followed immediately by the

SET POINTS key (usually F2).

2) Push the ENTER key. You are now in the

“SETUP SETPOINTS MENU.

3) The “SP MODE” menu is the first selec-

tion. Push the ENTER key.

4) You are now in the “SP MODE” menu. The

current mode is displayed. Use the UP or

DOWN scroll key to select “GRADING”.

5) Push ENTER to store your selection. You

are now back in the “SETUP SET POINTS” menu.

6) Use the “SET POINT ENTRY PROCEDURE” above to program all 8 set points to the following settings:

≈ Set point 1: On, MODE = GROSS, MESSAGE = “<10”, VALUE = 10. Set the

DEAD ZONE to 0 on this and all subsequent set points. Set point 2: On, MODE = GROSS, MESSAGE = “10–10.5”, VALUE = 10 Set point 3: On, MODE = GROSS, MESSAGE = “10.5–11”, VALUE = 10.5 Set point 4: On, MODE = GROSS, MESSAGE = “11–11.5”, VALUE = 11 Set point 5: On, MODE = GROSS, MESSAGE = “11.5–12”, VALUE = 11.5 Set point 6: On, MODE = GROSS, MESSAGE = “12–12.5”, VALUE = 12, Set point 7: On, MODE = GROSS, MESSAGE = “12.5–13”, VALUE = 12.5 Set point 8: On, MODE = GROSS, MESSAGE = “>= 13”, VALUE = 13

∆

EXIT

SETUP

EXIT

SETUP

7) Return to normal scale operation by

pushing EXIT twice after entering the last set point (8)

Grading Setup Procedure

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 “GRADING” mode the “GREATER” and “LESSTHAN” selections will be ignored.

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RELAY OUTPUT OPTION

This option adds 7 SPDT Relays and 1 Logic Level output to the MSI 3750. The relays can be used in conjunction with alarms, motors, and other control circuitry to provide a complete automated production line, or to provide additional information to the scale operator. Relay Function: The total of 8 set point outputs are addressable through the set point routines of the 3750. Each set point output is fully programmable to respond to weight changes. This section is intended to cover the electro-mechanical details of hooking up and using the set point outputs. For details on programming the set points, refer to the “SET POINTS” section. Electrical Specifications

Contacts Form C, common pin with 1 normally open, 1 normally closed contact Contact Rating 2A 30V DC, 0.6A 110V DC, 1A 125V AC (not rated for 240VAC!) Max. Power 60W, 125VA Expected Life Mechanical: 108 Cycles

Electrical: 105 Cycles @ 0.5A 125V AC resistive

Fuse 2A 125V rated SMD fuse (MSI P/N 10473) Isolation 280VAC 50/60 Hz Logic Output 1 normally high output, 1 normally low output (not isolated).

Fanout:1 TTL load, 25 CMOS loads

RELAY CABLING

The Relay connections are made into terminal blocks found on the circuit board internal to the MSI 3750. Due to wash down requirements, use round cable that has an outside diameter of .187” to .312” (5mm to 8mm) for proper sealing with the watertight fittings. The terminal blocks are suitable for wires from 16 to 24 gauge. There are up to three watertight fittings dedicated to the Set point Outputs. Multiple conductor cable will be necessary to access all of the relays. Cable Installation Procedure

1) Unplug the 3750 from the AC or DC power source.

2) Remove the 10 screws holding the front panel on.

3) Strip the outer insulation from the cable. Peel back the foil shield (if any) being careful not to nick the conductors. Cut off the foil shield leaving the drain wire intact. Strip 3/16” (5mm) from each conductor and tin the wires. Slip a piece of sleeving over the drain wire and tin the end of the drain wire. It is also wise to shrink a short piece of heat shrink tubing over the end of the outer jacket to further insulate the shield.

4) Loosen the watertight feedthrough and remove the white plug. Feed the cable through the watertight feedthrough.

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

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terminal strips. After all the pins are connected, lightly wiggle and tug on each wire to ensure that they are securely attached.

6) Tighten the watertight feedthrough around the outer insulation to ensure the water seal.

7) Replace the front panel being careful to seat the gasket evenly around the lip of the cabinet. Screw down the 10 screws in a criss-cross pattern to seat the gasket evenly.

RELAY APPLICATIONS

Some examples of uses for the set point relays are: Using the normally open position of a set point as a switch to turn on a light or siren when the set point is reached, using the normally closed position to cut out a motor when a set point is reached, or using the set point relays to change speeds on a motor. See Figure 1 for an example hook up to a lamp. The normally open (NO) contact of a relay is used to turn devices on when a set point is reached, while the normally closed (NC) contact is used to turn a device off when the set point is reached. The common (COM) contact connects the power to the relay.

Neutral

Hot

Turn on a Lamp when the Setpoint is reached

SMD FUSE

Relay

Figure 1

Set points are often used in conjunction with automatic conveyer belts. By using the set point relays, conveyor belts can be controlled by weight. Using two set points allows speed control for dribbling or speeding up, etc. Figure 2 shows a simple arrangement where the motor is turned off when a set point is reached. Pay attention to the current and voltage ratings of the relay when using them for motor control. It may be necessary to use a boost relay externally as in Figure 3.

SMD FUSE

Relay

Cut off a motor when the Setpoint is reached

Neutral

Hot

MOTOR

Figure 2

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Powering an External Relay for Higher Voltage or Higher Power

SMD FUSE

Relay

External

Relay

+24V Typ

+24V Return

Figure 3 By combining the relay outputs of 2 or more set points, complex in limits, out of limits, and speed controls can be implemented. In Figure 4, two set point outputs are combined to cut off a motor when the weight is outside two limits. In Figure 5 two relays are combined to turn on a motor when the weight is outside two limits.

SMD FUSE

Relay

SMD FUSE

Relay

Cut off a motor when the weight is out of limits

Motor is off when the weight is >5.5lbs or <4.5lbs

SP1 Set for <4.5lb SP2 Set for >5.5lb

SP1

SP2

MOTOR

Figure 4

SMD FUSE

Relay

SMD FUSE

Relay

Turn on a motor when the weight is out of limits

Motor is on when the weight is >5.5lbs or <4.5lbs

SP1 Set for <4.5lb SP2 Set for >5.5lb

SP1

SP2

MOTOR

Figure 5

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Programmable Logic Controllers (PLCs) are in common use for machinery control. The 3750 can interface to PLCs with the relay outputs or with the logic output on set point 8. Figure 6 shows one possible way of interfacing to a PLC. More sophisticated PLCs are able to take data directly from RS-232 and integrate the data into the control process. See the RS-232 option section for details.

Logic Input to PLC

+5V from PLC

Isolated Interface to a PLC

SMD FUSE

Relay

Logic Gnd from PLC

Figure 6

LOGIC OUTPUT (SET POINT 8)

Set Point 8 is unique from Set Points 1-7. The output consists of a logic output capable of driving standard TTL loads. As the output is in reality 4000B series CMOS devices, it may be necessary to provide an external pull-up resistor in certain cases. Values of 1kΩ to 4.7kΩ usually will suffice. There are two complementary outputs as shown in Figure 7. The TTL Hi output goes high when the set point is tripped. The TTL Low output goes low when the output is tripped. The logic output ground must be connected to provide a reference level. Output level is nominally 5V but can vary from 4.8 to 5.2V.

TTL LO

GND

TTL HI

Setpoint 8

Isolated Ground

Isolated

+5V

Figure 7

Besides providing a direct logic output to PLCs or other controllers, the logic output can be used to drive external relays. Figure 8 shows an example of the logic output driving an external N-channel MOSFET which can turn on a highpower relay.

WARNING

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 with logic inputs or base/gate connections to transistors.

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Figure 8

TEST SET POINT RELAYS

To test the connections and exercise the relays use the following procedure.

1) Push SETUP followed immediately by the SET POINTS key (usually F2).

Push ENTER. You are now in the SET POINTS menu.

2) Use the DOWN key to scroll to the “TEST SP” selection. Push ENTER.

3) Use the UP key to step progressively through each set point. Each relay will

turn on in succession and the message display indicates which set point relay is activated.

4) When done testing the relays push EXIT twice to return to normal scale

operation.

Driving External Relays with Setpoint 8

External

Relay

+24V Typ

+24V

Return

10kΩ

Resistor

Logic Level

N-Chan

Power MOSFET

TTL LO

GND

TTL HI

Setpoint 8

Isolated Ground

Isolated

+5V

WARNING

This procedure will turn on and off any device connected to the relays. Make sure that doing so will not cause a safety hazard or damage property or goods.

WARNING

Potentially fatal voltages are present within the meter! Always remove power from the meter and your circuit before opening the cabinet and connecting the relay circuits. Ensure that the conductors to your circuit 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.

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SECTION 7 – COMMUNICATION PORTS

INTRODUCTION

• The MSI 3750 is equipped with a single RS-232 serial input/output and a Real Time Clock/Calendar. The Comm Port is intended for interfacing printers, data loggers, scoreboards, and computers to the 3750 Meter. The real-time clock allows the user to time and/or date stamp any data obtained from the 3750.

• The data output is fully formatable. The 3750, under menu control will print control characters for easy interfacing to any label printer. An initialize string combined with start string, product labels, user programmable data, weight data, and end strings, provides complete control over printed data.

• A second Comm Port option is available (must be ordered separately). The second Comm Port can be RS-485, RS-422, RS-232, or a Fiber-Optic output. The second Comm Port has independent data string and port settings from Comm Port1 and can be used for a different function than Comm Port1. For example, a printer could connect to Comm Port1, and a scoreboard or computer to Comm Port2.

• Many scales and weigh meters suspend weighing operation while printing and will not function until a print job is completed. The MSI 3750 RS-232 option uses advanced DMA (direct memory access) techniques for transmitting the print strings. This prevents long print jobs from interfering with scale operation.

Comm Port Function The RS-232 output is used in conjunction with the PRINT key to output weight and total data to a printer or can be used for 2-way communications with a computer. In addition there are several automatic print modes including print on Total, when there is a weight change, or when a set point is reached. Interval and continuous printing is available for data logging or interfacing Scoreboard displays.

ELECTRICAL CONFORMANCE

COMM PORT 1 The electrical characteristics of the serial input/output conform to the EIA Standard EIA-232-D (downward compatible with RS-232-C). Comm Port 1 is configured as 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.

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COMM PORT 2 (2nd Comm Port Option only) Comm Port 2 can be configured in three ways:

1) RS-232 – In the RS-232 mode, the electrical characteristics of the serial output is configured to conform to the EIA Standard EIA-232-D (downward compatible with RS-232-C). The port is configured as DCE. Cable connections include RXD (input), TXD (output), Signal Ground, and RTS (Output). The RTS output is passive and indicates to the DTE port that the cable connection is made. 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. In addition, 32 RS-485 devices can be daisy-chained together providing networking capabilities. In accordance with RS-485 standards the cabling should be terminated at the extreme ends of the cable (not at each node) with a 120Ω resistor in series with a 0.1µF ceramic capacitor. Cable Connections are I/O+, I/O-, and signal ground. Serial data is both transmitted and received on the same lines (half duplex). As an output, the 485 Driver is compatible with RS-422 Receivers.

3) Fiber-Optic Output (Option) – The Fiber-Optic Output provides an output capable of driving 3000 feet of plastic fiber optic cable. This is an output only and intended for driving printers or transmitting data to a computer when no computer control or handshaking is necessary.

COMM PORT CABLING

The Comm Port 1 RS-232 connections are made into TB3 found on the circuit board internal to the MSI 3750. Due to wash down requirements, no interface cable is supplied. Cables with an outside diameter of .187” to .300” (5mm to

7.5mm) are sealable with the watertight fitting. Preferably, cables should have

twisted pair connections with an over shield. In the table below, twisted pairs are represented by A, B, and C. RS-232 Cable Installation, Comm Port 1

1) Unplug the power cable. Remove the 10 screws holding the front panel on.

2) Strip the outer insulation 1.5” (40mm) from the cable. Peel back the foil shield (if any) being careful not to nick the conductors. Cut off the foil shield leaving the drain wire intact. Strip 3/16” (5mm) from each conductor and tin the wires. Slip a 1 5/16” (33mm) piece of sleeving over the drain wire and tin the end of the drain wire. It is also wise to shrink a short piece of heat shrink tubing over the end of the outer jacket to further insulate the shield.

3) Loosen the center watertight feedthrough and remove the white plug. Feed the RS-232 cable through the center watertight feedthrough.

4) The terminal block uses push levers. Insert the wires as shown in the

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following diagram. Insert a small flat bladed screwdriver in the white lever and push down to insert the wire. Use only the wires necessary for your application per table 1. Be sure to terminate the shield wire in position 1 (Shield Ground AKA Frame ground). In the Duplex w/ CTS/RTS mode where there are two signal grounds, connect both signal grounds to pin 6. After all the pins are connected, lightly wiggle and tug on each wire to ensure that they are securely attached. Reset or reposition the wires as necessary.

5) Replace the front panel being careful to seat the gasket evenly around the lip of the cabinet. Screw down the 10 panel screws in a criss-cross pattern to seat the gasket evenly.

6) Tighten the watertight feedthrough around the outer insulation to ensure the water seal.

TB3 RS-232

RS-232 Shield Ground

RS-232 Xmitter (Output)

RS-232 Receive (Input) RS-232 RTS (Output)

RS-232 CTS (Input)

RS-232 Signal Ground

COMM PORT 1

Std RS-232 Option

23456

SHLD

TXD

RXD

RTS

CTS

SGND

RS-232 Cable Installation, Comm Port2

1) Unplug the power cable. Remove the 10 screws holding the front panel on.

2) Strip the outer insulation 1.5” (40 mm) from the cable. Peel back the foil shield (if any) being careful not to nick the conductors. Cut off the foil shield and the drain wire. Strip 3/16” (5 mm) from each conductor and tin the wires. It is wise to shrink a short piece of heat shrink tubing over the end of the outer jacket to further insulate the shield.

3) Loosen the center watertight feedthrough and remove the white plug. Feed the RS-232 cable through the center watertight feedthrough. If the center watertight feedthrough is occupied, install the 2nd Comm Port cable through the watertight feedthrough on the rear panel.

4) Insert the wires as shown in the following diagram. Insert a small flat bladed screwdriver in the white lever and push down to insert the wire. Use only the wires necessary for your application per table 1. Note that RTS is a passive output in Comm Port 2 and that there is no CTS. After all the pins are connected, lightly wiggle and tug on each wire to ensure that they are securely attached. Reposition the wires as necessary.

5) Replace the front panel being careful to seat the gasket evenly around the lip

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of the cabinet. Screw down the 10 front panel screws in a criss-cross pattern to seat the gasket evenly.

6) Tighten the watertight feedthrough around the outer insulation to ensure the water seal.

RS-485 Cable Installation, Comm Port2

1) Remove the 10 screws holding the front panel on.

2) Strip the outer insulation 1.5” (40mm) from the cable. Peel back the foil shield (if any) being careful not to nick the conductors. Cut off the foil shield leaving the drain wire intact. Strip 3/16” (5mm) from each conductor and tin the wires. Slip a 1 5/16” (33mm) piece of sleeving over the drain wire and tin the end of the drain wire. It is wise to shrink a short piece of heat shrink tubing over the end of the outer jacket to further insulate the shield.

3) Loosen the center watertight feedthrough and remove the white plug. Feed the RS-485 cable through the center watertight feedthrough. If the center watertight feedthrough is occupied, install the 2nd Comm Port cable through the watertight feedthrough on the rear panel.

4) Insert the wires as shown in the following diagram. Insert a small flat bladed screwdriver in the white lever and push down to insert the wire. Connect wire 1A to I/O+ and wire 2A to I/O-. Connect the shield to pin 3 ground After all the pins are connected, lightly wiggle and tug on each wire to ensure that they are securely attached. Reposition the wires as necessary.

5) Replace the front panel being careful to seat the gasket evenly around the lip of the cabinet. Screw down the 10 front panel screws in a criss-cross pattern to seat the gasket evenly.

6) Tighten the watertight feedthrough around the outer insulation to ensure the water seal.

TB5

Fiber-Optic Xmitter + Fiber-Optic Xmitter – RS-485/232 Signal Ground

RS-232 RTS (Output)

RS-232 RXD (Input)

RS-485 I/O+

RS-485 I/O–

RS-232 TXD (Output)

OPTION BOARD

COMM PORT 2

2nd Comm Port Option

FO OUT

+–

GND

TXD

RTS

RXD

TXD+

TXD-

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DATA CONFIGURATION

The 3750 serial port options are configured with the “COMPORT” Menus. Standard data configuration is:

Parameter Default Menu Choices

Baud Rate 9600 300, 600, 1200, 2400, 4800, 9600, 19200 Data Bits 8 7 or 8 Parity None None, Even, Odd Start Bits 1 1 (can't be changed) Stop Bits 1 1 or 2

Data parameters are independent for Comm Port 1 and Comm Port 2.

Data String Buffers

A Data String is simply a collection of characters stored in memory, that are used to format the Comm Port output. Data Strings are defined by the user. The length of the formatting strings are limited to 255 characters.. However, since 3 or 4 character commands can cause an output of up to 99 characters in length, the following numbers do not represent the maximum size of the data output. The 3750 offers the programmer the ability to print any and all weight data, time and date stamp, and formatting controls suitable for even the most complex bar code printer.

Data Format

Each transmitted reading consists of a number of programmable character strings. Data is completely user programmable and can include formatting characters and text in addition to all weight parameters. The End-of-Line string is used for Carriage Return or other end-of-line control characters. These are easily entered through the Comm Port menu or downloaded through a computer.

OUTPUT CONTROL

The MSI 3750 serial ports function in any of 10 modes:

1) Front Panel Print Key:

This is a print on command mode which works when the print button on the front panel is pushed. The Print key is active in all modes unless disabled by computer control or the Lock Function. The “MOTN DET” menu determines if printing is allowed or disallowed when the weight is in motion and/ or not stable.

2) Computer Control:

The computer can control and receive data from the MSI 3750 through the

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use of simple ASCII commands. These commands can be sent through the use of a data communications terminal, or a custom computer program. The “MOTN DET” menu determines if printing is allowed or disallowed when the weight is in motion and/or not stable.

3) Print on Total: When the weight is totaled, one transmission of data will occur. Once transmitted, the scale must return below the Total Threshold (See Total Setup pg. 37) to re-enable the transmission. Interval has no effect in this mode.

Using Print on Total with the Auto Total enabled should not be used with any weight printout other than W7. Use “Print on Load” to print the totaled weight.

4,5 & 6) Print on Set-Point:

Set-point1, Set-point2, or Set-point 1&2 can be configured to trigger a data print. Once transmitted, the set-point must go off then on again to transmit again. Print on a set point can also be configured to print when two setpoints are true. This configuration allows printing when the weight is outside two limits or when the weight is inside two limits (windowed). The “MOTN DET” menu determines if printing is allowed or disallowed when the weight is in motion and/or not stable.

7) Print On Change: Every time the weight changes 1 full display count or more, one transmission of data will occur. The “MOTN DET” menu determines if printing is allowed or disallowed when the weight is in motion and/or not stable. Interval has no effect in this mode.

8) Print on Load Change: When the load weight exceeds the Total Threshold and motion ceases, one transmission of data will occur. Once transmitted, the scale must return below the Total Threshold to re-enable the transmission. Interval has no effect in this mode.

9) Print Continuous or on Intervals: The Data String can be transmitted continuously for driving scoreboards. The “MOTN DET” menu determines if printing is allowed or disallowed when the weight is in motion and/or not stable.

10) Print on CTS (Clear to Send, a RS-232 handshake line): By toggling the CTS line from space to mark, the print string will be transmitted. If the interval is set, the string will continue to print as long as CTS is asserted.

In addition to the Control modes above, each of the 8 set points can independently send a formatted print string. This is detailed in Section 6. These print strings are usually used for warnings or annunciation of weighing events. As the 3750 “@” commands can be buried in the set point strings, this capability greatly expands the versatility of the Comm Ports.

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There is also a special print mode used with the VIEW ∑ key. Pushing VIEW ∑ followed immediately by the PRINT key will output just the current ID Codes total and Total Count. See “@W7” for formatting information on this special output.

COMMPORT SETUP MENU

COMM PORT setup and Data Formatting.

COMM PORT 1

This menu choice leads to the COMM PORT PARAMETERS Menu for all parameters related to COMM PORT 1.

COMM PORT 2

This menu choice leads to the COMM PORT PARAMETERS Menu for all parameters related to COMM PORT 2.

SCALE ID

This menu designates an ID number that is required for multiple scale setups (usually networked with RS-485). The user can assign a unique number per scale from 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).

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COMM PORT PARAMETERS MENU

RS-232 RS-485 F-OPTIC

INPUT ID 1-255

FORMAT MODE CONTROL MOTION INTERVAL SETTINGS

COMMPORT2 TYPE

COMM PORT SETUP MENU

EVEN ODD NONE

COMPORT2 COMPORT1

COM2TYPE

SCALE ID

300 600 1200 2400 4800 9600 19,200

ENABLED DISABLED

DUPLEX OFF TALK LISTEN

PRINTKEY CONTIN ON CTS ON SP1 ON SP2 SP1+SP2 ON TOTAL ON CHANG ON LOAD

DATA STRTLINE END LINE WAIT CHR

Enter Up to 255 Characters

Enter Up to 4 Characters

Enter 1 Character

BAUDRATE STOPBITS DATABITS PARITY HANDSHAK

ONCE ON

INPUT INTERVAL 0-28800s

1 BIT 2 BIT

7 BIT 8 BIT

BAUD RATE

RTS/CTS XON/XOFF NONE

DATA ENTRY

STRING SELECT

OUTPUT

CONTROL

COMM PORT

PARAMETERS MENU

STOP BITS

PARITY

HANDSHAKING

(No RTS/CTS on Port 2)

DATA BITS

DATA FLOW

COMM PORT

SETTINGS

EXIT

SETUP

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FORMAT

The FORMAT menu is the heart of the communications system. It controls the data output generated by the 3750 Meter.

DATA: The “DATA” section is where all printing and formatting commands are entered. This is covered in depth in the “Printer/Output Formatting” section.

STRTLINE: The “START LINE” string can be 0 to 4 characters long. It is intended for commonly used commands that usually precede printed lines. Typically ESC codes are used on some printers to enable or format the print string. The start of line string is usually referred to as the “SOL string”. The string defaults to empty.

END LINE: The “END-OF-LINE” string can be 0 to 4 characters long. Most commonly used for Carriage Return (CR) or Line Feed (LF), or CR/LF. The EOL string defaults to Line Feed. See “Programming the End of Line String” for an example.

WAIT CHR: The “WAIT CHARACTER”, if entered, will cause the print output to pause after each EOL string until the designated character is received by the port. To use the Wait Character mode, the Comm Port mode must be Duplex. Once the proper Wait Character has been received the 3750 will output the next data string up to the next EOL string.

MODE: The MODE menu sets the communications mode for the port. Use “TALK” for outputting data to a printer that uses hardware handshaking or no handshaking. Use “DUPLEX” for printers with software handshaking (XON / XOFF, etc.) or to talk and listen to a computer. Use “LISTEN” to only receive commands from a computer. Use “OFF” to disable the port (and save power on battery units).

CONTROL: The control menu designates the condition that causes the 3750 to output data. The Print key will always work unless specifically locked out. When the designated control is received by the scale, the print string specified in the “DATA” menu will be transmitted. If the “MOTION” parameter is enabled, the motion annunciator must be off for the scale to output data. If a valid control is received, the 3750 will wait for the next settled (out of Motion) reading before it will output data. See descriptions of the Control Modes in the “Output Control” section on pg. 78..

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

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Comm port while the weight is in motion.

INTERVAL: Selecting “ONCE” means that after the trigger condition, a single transmission of data will occur. Selecting “ON” enables a timed transmission rate. A print interval can be entered from 0 to 28,800 seconds. Used in conjunction with the Continuous output mode, this can generate a time based datalogging system. An interval of 0 seconds means that the scale will output data at the highest rate possible (limited to 4 readings per second). Interval used with other control modes can be useful for control and monitoring purposes.

SETTINGS: The Settings menu is used to set standard Comm Port parameters: BAUDRATE: Standard Baud Rates available are 300, 600, 1200, 2400, 4800, 9600, 19200. The 3750 defaults to 9600 Baud. See “To Set The Baud Rate”. STOP BITS: Either 1 or 2 Stop Bits can be set. The 3750 Stop Bits default to 1. DATA BITS: Either 7 or 8 Data Bits can be set. If 7 bit mode is set, Data Characters above 127dec cannot be sent or received. The 3750 defaults to 8 bits. PARITY: Parity mode is NONE, EVEN or ODD. The 3750 defaults to “NONE”, parity off. 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.

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To Set the Baud Rate

1) Push SETUP followed immediately by the

PRINT key. The message reads “COMPORT1”.

2) Push ENTER. The message reads “FOR-

MAT”.

3) Push the DOWN key to locate the “SET-

TINGS” sub-menus.

4) Push ENTER. The first sub-menu choice in

the Settings menu is “BAUDRATE”.

5) Push ENTER. The current Baud Rate is

displayed.

6) Use the UP or DOWN key to scroll

through the available Baud Rates.

7) When the desired rate is shown, push

ENTER. You are now back in the “SET-

TINGS” Menu.In this example we’ll change the Baud Rate to 19,200.

8) Either use the UP/DOWN scroll keys to

select another SETTINGS menu or push the

EXIT key three times to return to normal

scale operation.

Each push of the EXIT key will backup 1 menu level.

➀

EXIT

SETUP

➀

COMPORT1

➁

ENTER

FORMAT

➂

EXIT

SETTINGS

√

ENTER

BAUDRATE

➄

ENTER

9600

≈

19200

≤

ENTER

BAUDRATE

≥

EXIT

SETUP

EXIT

SETUP

EXIT

SETUP

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PRINTER / OUTPUT FORMATTING

The RS-232 Option can format virtually any Printer or Serial Data Device including complex bar-code label printers through the use of the built in printer formatting. To use this versatile feature, the user must input command codes and data in a specific manner. Each command code consists of a 1 or 2 letter mnemonic. Some command codes also require a numeric suffix.

A simple example of this structure is the default print data string: @W1@E º. The “@W” command code means to print weight. The “1” means print the current display mode. The “@E” will cause the End-of-line string to be printed. The command string must always be terminated by an ASCII 255 character. The 3750 indicates ASCII 255s with “ º”.

By combining the “@” commands with standard ASCII characters, control characters, etc., any data available from the scale, plus any additional text, can be printed in any order desired. Using formatting controls typical to modern barcode printers is simply a matter of formatting the printer strings.

The MSI 3750 character set includes all upper case letters, lower case letters, numbers, and most of the rest of the standard ASCII set.

General Alpha-numeric Entry Procedure

1) Use the Aa1 (ALPHA) key to switch between numeric “n”, upper case “U”, or lower case “L”.

2) Press the desired character key. If a “B” is needed, push the ABC key twice.

3) Enter the displayed character by either pushing a different key, or the

ENTER key. For example, if two “B”s in a row are needed, use the ENTER key.

4) Terminate the character string by pushing ENTER twice.

LCD Display Character Set

ABCDEFGHIJKLMNOPQRSTUVWXYZ [\] ”_’ abcdefghijklmnopqrstuvwxyz~spc !”$%&? ( ) *+. – 0123456789:;<=>?@

Control characters and any other character can be printed with the following procedure.

Alternate Characters and Control Characters

1) Push the TARE key. This enables the ASCII numeric entry

mode. A place holder character indicates an ASCII character not included in the MSI 3750 character set.

2) 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

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the desired character number is displayed push ENTER.

See “Programming the End of Line String” for an example of using the ASCII entry mode.

SETUP

POSITION OF CURSOR

CHARACTER

DECIMAL ASCII

CODE

PRINT STRING ASCII NULLS

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3750 Key Functions during Data Entry

Enables the “ENTER ASCII” mode. Use this key to enter ASCII characters and control characters not included in the standard MSI 3750 character set.

Used to enter characters. If pushed twice Enter also functions as “EXIT and SAVE”.

Pushing the EXIT key will terminate the data entry and cause any changes made to be canceled. “EXIT and don’t SAVE”.

Clear. Will erase any character the cursor is positioned on and move the remaining characters to the left.

Note: Pushing CLEAR followed by the LEFT Cursor key will clear the entire data line.

Left and Right Cursor Keys. Use to position the cursor under characters to be edited. Use the Right Cursor as a space character.

In Alpha mode, the space key provides space and punctuation marks: @ ! “ # $ % & ‘ ( ) * +, – . / : ; < = > ? [ \ ] ^ _ `

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.

The Alpha Key is used to change the data entry from Numeric to Alphanumeric. The LCD indicates “n” for numeric entry, “U” for upper case Alphanumeric, and “L” for lower case Alpha-numeric.

ENTER

EXIT

SETUP

ALPHA

SPACE

@YZ

➠

ABC

ZERO

EXIT

INSERT

B/G

NET/GROSS

TARE

ASCII

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EXAMPLE PRINTER FORMATTING

The following example will take you step by step through a formatting process. The end result of this example will produce a printout similar to this:

PEARS

4.500 lb NET 8/15/2002

In this example we’ll use control characters to both print in red and expand the characters for “PEARS”. Note: control codes used in this example are unique to a specific printer (a Star Micronics DP8340) and are used for example only. The necessary string will be:

∂ The 27 is an ESC followed by a 4 which equals “Red Character Print

instruction”

∑ The 14 is an SO which turns on the Expanded character instruction ∏ The 20 is an DC4 which turns off the Expanded character instruction π The 27 is an ESC followed by a 5 which turns off the Red Character Print

instruction

∫ @E causes the end-of-line string to be sent.

❻ @W3 causes the current Net weight to be printed. If the scale was in the

NET mode, @W1 would have worked as well.

❼ @D2 causes the current date to be printed in MM/DD/YY format

Ω @E causes the end-of-line string to be sent.

❾ 255 is used by the 3750 to terminate the entire print string.

ASCII String Notes

27 14 20 27 255

4 P E A R S 5 @ E @ W 3 @ D 6 @ E

❶ ❷ ❸ ❹ ❺ ➏ ❼ ➑ ❾

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Example Print Data Formatting

1) Push SETUP followed immediately by the

PRINT key. The message reads “COM-

PORT1”.

2) Push ENTER. The message reads “FOR-

MAT”.

3) Push ENTER. The message reads

“DATA”.

4) Push ENTER. The LCD changes into the

formatting mode. Any previously stored printer DATA will appear on the screen. You can just write over the top of it.

5) First we need to enter an ASCII ESC character.

Referring to the ASCII chart (Appendix B) we find the an ESC is decimal 27. We will use the ASCII entry mode to place a 27 in the string.

Push ASCII (TARE). The LCD message changes to “ASCII”. The numeric digits indicate the decimal number of the ASCII character.

6) Push the 2 key then the 7 key. Push

ENTER. The resultant string so far should

look like this:

The Í character takes the place of the 27 we just entered. This can be verified by backspacing 1 space and noting the decimal display. It should read “ 1. 27” meaning the first character is an ASCII 27.

7) Push the 4 key to enter the next needed

character. Push ENTER.

8) Using the step 5 procedure, enter an ASCII

14.

➀

EXIT

SETUP

➀

COMPORT1

➁

ENTER

FORMAT

➂

ENTER

DATA

√

ENTER

SETUP

➄

TARE

ASCII

≈

DEF

≈

STU

27_

≈

ENTER

Íººººººº

∆

JKL

∆

ENTER

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9) Next enter the text “PEARS” through the

use of the ALPHA key and the appropriate Letter keys. (See “General Alphanumeric Entry Technique”).The resultant string so

far should look like this:Í4ÍPEARS

10) Use the ASCII mode to enter the following two characters – the “DC4” (dec 20) and an “ESC” (dec 27).The resultant string so far

should look like this:Í4ÍPEARSºº

11) Enter the “5”. Since the Alpha mode is in the Upper case condition, push the 5 key four times (or push the ALPHA key to change to the numeric mode).

12) Enter the “@E” to embed the end of line string in the Data String.

13) Enter the “@W3” to place the Net Weight reading in the Data string.The resultant string so far should look like this:

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.

≥

TARE

ASCII

ABC

JKL

ENTER

➈

ALPHA

➈b

PQR

➈c

DEF

➈

ABC

PEA

➈

PQR6PQR6PQR

PEAR

➈

STU

PEARS

➈

ENTER

➉a

TARE

ASCII

DEF

SPACE

ENTER

➉b

TARE

ASCII

DEF

STU

ENTER

MNO

@YZ

DEF

@YZ

VWX

ALPHA

GHI

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14) Enter the “@D2” to date stamp the printed Data.

15) Enter the “@E” to terminate with another end of line string.

The entire string must end with an ASCII 255. If the final character is not followed by a 255

character “

” put one in. To force an ASCII

255 position the cursor 1 character past the last wanted character and push the CLR key.

16) Finish out the String Entry by pushing

ENTER twice.

Final String

å4åPEARSåå5@E@W3@D2@Eº

Push EXIT to return to normal scale operation or use the UP/DOWN keys to continue through the COMMPORT setup menus.

ALPHA

@YZ

DEF

ALPHA

DEF

ALPHA

@YZ

DEF

ENTER ENTER

EXIT

SETUP

1) Push SETUP followed immediately by the

PRINT key. The message reads “COM-

PORT1”.

2) Push ENTER. The message reads “FOR- MAT”. The “END LINE” entry screen is in the FORMAT Menu.

➀

EXIT

SETUP

➀

COMPORT1

➁

ENTER

FORMAT

PROGRAMMING THE END OF LINE STRING

The End of Line String is used to terminate print strings and is printer dependent. The default string is Line Feed (LF=ASCII 10). In this example a Carriage Return (CR=ASCII 13) will be added to the EOL String. Refer to the ASCII table in the Appendix for proper codes.

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3) Push ENTER. The message reads

“DATA”.

4) Use the UP key to scroll to “END LINE”.

5) Push ENTER. You are now in the EOL

entry screen. The current EOL String is displayed. The cursor is flashing on the LF character.

6) Insert a character position by pushing the

NET/GROSS key. The LF (10) character

will move to the right. The place holder character (255) is now flashing.

7) Since the CR is a control character, push

the TARE key to enable the ASCII Entry screen.

8) Change the 255 character into a CR by

pushing 1 then 3 then ENTER. The EOL screen reappears with the cursor on the next character, the LF that was present before. The EOL string now consists of two characters (other than the place holders).

You can use the cursor keys to verify that character 1 is a 13 (Carriage Return) and that character 2 is a 10 (Line Feed).

9) Push ENTER twice to return to the Format

Menu.

10) Use the UP/DOWN keys to scroll to another FORMAT menu, or push the EXIT key several times to return to normal scale operation. Each push of the EXIT key will backup 1 menu level.

➂

ENTER

DATA

√

STRTLINE

√

END LINE

∞

ENTER

SETUP

≈

INSERT

B/G

NET/GROSS

SETUP

Flashing Character

≤

TARE

ASCII

➇

ABC

➇

GHI

13_

➇

ENTER

SETUP

➈

ENTER

➉

EXIT

SETUP

EXIT

SETUP

EXIT

SETUP

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EDITING THE PRINT STRING

To change a character

Use the LEFT(<) and RIGHT (>) Scroll keys (Alpha mode must be “n”) to move around in the print string. The flashing digit indicates the editable character. Once the desired character is flashing, use the Alpha key to change to the Alpha mode, then use the letter keys to change it. If you need to change it to a character not in the 3750 character set, use the ASCII number entry procedure. Push ENTER twice to store the edited string.

To insert a character

Use the LEFT(<) and RIGHT (>) Scroll keys to move around in the print string. The flashing digit indicates the editable character. Insert a new character in front of the flashing digit by pushing the NET/GROSS key. Next input the desired character. Push ENTER twice to store the edited string.

To delete a character

Position the cursor (blinking character) over the character you wish to delete. Push CLR. The remaining characters move over 1 space. Push ENTER twice to store the edited string.

Note: Pushing the EXIT key will exit out of the menu and restore the string as it was. The changes must be saved with the double ENTER key push or by pushing the POWER key.

To disable the Entire Print String

Position the cursor (blinking character) over the first character in the Print String. Push INSERT to insert a “º” (ASCII 255) character at the beginning of the String. Push ENTER twice to store the disabled string. This procedure is more efficient than using the CLR key to delete the entire String, especially if the String is very long. The 3750 ignores all characters past the first “º” it encounters. To enable the string, position the cursor over the “º”character and push

CLEAR. This procedure can also be used to divide a long print string into smaller

parts by inserting a “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.

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GENERAL TEXT/CONTROL CHARACTER ENTRY

Text or control characters are simply entered into the printer data string. All ASCII characters from 0dec to 127dec can be entered with the exception of the “@” symbol which the 3750 uses for its control characters (enter “@@” to print a single “@”). If 8 bit data transmission is enabled additional codes 128 to 255 can also be assigned. These upper numbers are often used for graphics characters on printers. “@” Commands are case sensitive, only capital letters are used.

Input Data Form

With the exception of characters following the command “@” symbol, all characters are treated as printable text or control characters. The MSI 3750 represents characters that can’t be displayed on the LCD with a “å“. Terminate the string with a dec255 character (ASCII 255). ASCll 255 characters are represented with a “º“. The “ASCII Entry Mode” is provided to input Control 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.

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SERIAL OUTPUT “@” COMMANDS

The printer formatting “@” commands and their data configurations are as follows:

@@ PRINT AN “@”

Purpose: Use the @@ command to cause the output to send an “@” sign. Since this character is normally used for printer formatting, this is the only way to output the @ sign by itself.

@B PRINT BLANK SPACES

Purpose: Use the @B command to cause the output to send a series of spaces. Can be used to position data on a label without having to enter multiple spaces.

Input Data Form: @Bxx where xx is any number from 01 to 99 which equals the number of spaces desired.

Note: Exactly two digits must follow the “@B” command.

Output Data Form: “x” spaces are output limited to 99. For more spaces use two @B commands in series.

Note: For spaces fewer than 5, it is more efficient to enter spaces instead of the @B command.

Example - Building on the previous example, we’ll center the “MSI 3750” on a 20 column printer:

@B06å4åMSI3750åå5º

The @B06 command printed 6 spaces followed by “MSI 3750” in red expanded characters.

@C PRINT ID CODE NUMBER

Purpose: Use the @C command to cause the output to send the current product code number. The number can vary from 0 to 999 depending on the current ID# that the scale is set in. Note that the blank place holder ID# is always 1, so the lowest alpha entry will be ID#2.

Input Data Form:

@C1 to print the ID Code number plus descriptor @C2 to print the ID Code number only

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123456789101112

123

12345678

DAY

MONTH

YEAR

DAY OF THE WEEK

12345678910

1234567

DAY MONTH

YEAR

910

2345678

DAY

MONTH YEAR

2345678

MONTH

DAY

YEAR

Output Data Form:

@C1 ID CODE # 4

Length: 12 Justification: “ID CODE” left justified, number right justified.

@C2 4

Length: 3 Justification: right

@D PRINT DATE

Purpose: Use the @D command to print the date register of the real time clock/calendar.

Input Data Form:

@D1 Full alpha date in the form DDMMMYY with the month spelled out @D2 Print date in the form MM/DD/YY @D3 Print date in the form DD/MM/YY (European Standard) @D4 Print the day of the week @D5 Full alpha date in the form DDMMMYYYY with month spelled out @D6 Print date in the form MM/DD/YYYY @D7 Print date in the form DD/MM/YYYY (European Standard)

Output Data Form:

@D1 25JUL00

Length: 8 Justification: left, leading day zero suppressed

@D2 4/ 25/ 00

Length: 8 Justification: full, leading month zero suppressed

@D3 25/ 07/01

Length: 8 Justification: left, leading day zero suppressed

@D4 SATURDAY

Length: 10 Justification: left, position 10 always a space.

@D5 25JUL2000

Length: 10 Justification: left, leading month zero suppressed, pos 10 is space

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234567

MONTH

DAY

YEAR

8910

234567

DAY

MONTH

YEAR

8910

@D6 07/ 25/ 2001

Length: 10 Justification: full, leading month zero suppressed

@D7 25/ 07/ 2001

Length: 10 Justification: full, leading day zero suppressed

@E PRINT END OF LINE

Purpose: Use the @E command to output the end-of-line string. The EOL string is entered in the printer Format section

Input Data Form:

Output Data Form: Sends out the EOL string. Usually a Carriage Return or Line Feed, CR/LF, ETX, etc. Can include formatting commands. See Format

@H PRINT HORIZONTAL TABS

Purpose: Use the @H command to send a series of Tabs. Can be used to position data on a label without having to enter multiple spaces. Not all printers support tabs. Check with printer manual for proper application of tabs in printer formatting.

Input Data Form: @Hxx where xx is any number from 01 to 99 which equals the number of tabs desired. Note: you must enter two digits following the “@H”.

Output Data Form: “x” tabs are printed (limited to 99). For more tabs use two @H commands in series.

@I PRINT SCALE ID

Purpose: Use the @I command to print the scale ID number. Probably most important when multiple scales are in the area and there is a need to identify which scale supplied the data. Not to be confused with ID Codes, see @N and @C.

Input Data Form: @I1 Print scale ID# (0-255) and descriptor

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123

@I2 Print scale ID# (0-255) only Output Data Form:

@I1 SCALE ID#123

Length: 12 Justification: word left, number right, leading zeros suppressed

@I2 123

Length: 3 Justification: right

@L PRINT ID CODE STRINGS

Purpose: Use the @L command to print one or both of the ID Code Strings. ID Code Strings will change as the ID code number is changed. ID Code Strings can include text, numbers, and control codes thereby allowing the printer format or text to change with the ID Code.

Input Data Form:

@L1 Print ID Code String 1 @L2 Print ID Code String 2

Output Data Form: Depends on user entered Strings. Up to 20 bytes unless “@” codes are embedded, which could increase the length of data generated by this command. Caution: Do not embed an “@L” command inside the ID String as this will cause an endless loop.

@M PRINT WEIGHING MODE

Purpose: Use the @M command to print either the current weighing mode or print the internal mode strings.

Input Data Form:

@M1 Print current displayed weighing mode @M2 Print “GROSS” @M3 Print “NET” @M4 Print “TARE” @M5 Print “TOTAL” @M6 Print “T CNT” (Total CouNT= number of weighments totaled) @M7 Print “TOTAL T CNT” @M8 Reserved - Not used on 3750 @M9 Print “GROSS+” or “NET+” or “AD2TOT” depending on the last

totaled weight mode.

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123456

123456789101112

123456

Output Data Form:

@M1 ******

Length: 6 Justification: left

*****

= Current Displayed mode, see

@M2,@M3, @M4, @M8.

@M2 GROS S

Length: 6 Justification: left

@M3 NET

Length: 6 Justification: left

@M4 TARE

Length: 6 Justification: left

@M5 TOTAL

Length: 6 Justification: left

@M6 T- CNT

Length: 6 Justification: left

@M7 TOTAL, T- CNT

Length: 12 Justification: left

@M9 If Gross weight is added GROS S +

Length: 6 Justification: left

@M9 If Net weight is added NET+

Length: 6 Justification: left

@M9 If Register is Empty AD2 TOT

Length: 6 Justification: left, the “+” indicates that it is the weight from the last

totaled register

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1234567

HH MM

1234567

AM/PM

12345

HH MM

1234567

AM/PM

91011

@N PRINT ID CODE NAME

Purpose: Use the @N command to print the current ID Code Name.

Input Data Form:

Output Data Form:

@N IDNAME**

Length: 8 Justification: left (*Up to 8 Characters)

@S PRINT START OF LINE STRING

Purpose: Use the @S command to output the Start of Line string. The SOL string is preprogrammed in the “COMM PORT Setup Menus”.

Input Data Form: @S Print SOL String

Output Data Form: Sends out the SOL string, a maximum of 4 bytes.

@T PRINT TIME

Purpose: Use the @T command to print the current time register from the real-time Clock.

Input Data Form:

@T1 12 hour format with HH:MM @T2 12 hour format with HH:MM:SS @T3 24 hour format with HH:MM @T4 24 hour format with HH:MM:SS

Output Data Form:

@T1 2:08 PM

Length: 8 Justification: full, leading hours zero suppressed

@T2 2:08: 36 PM

Length: 11 Justification: full, leading hours zero suppressed

@T3 14: 08

Length: 5 Justification: left, leading hours zero suppressed

Measurement Systems MSI-3750 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual